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RELATED APPLICATIONS
[0001] The present application claims priority from and is a
continuation-in-part of PCT application PCT/IL02/00790, filed on Sep. 25,
2002, which designates the US, now published in English as WO 03/026475.
It also claims priority as well as the benefit under 119 (e) of U.S. Ser.
No. 60/492,998, filed on Aug. 7, 2003. This application is also a
continuation-in-part of PCT/IL02/00215, filed on Mar. 18, 2002,
PCT/IL01/01019, filed on Nov. 4, 2001, PCT/IL01/00903, filed on Sep. 25,
2001. The disclosure of all of these applications, which designate the US
and were filed in English, are incorporated herein by reference.
FIELD OF THE INVENTION
[0002] The present invention relates to anastomotic connectors.
BACKGROUND OF THE INVENTION
[0003] Two blood vessels can be connected to form an anastomotic
connection in many methods, including, for example, using surgical clips,
using sutures, and using anastomotic connectors, for example as provided
by Kaster in U.S. Pat. No. 5,234,447, the disclosure of which is
incorporated herein by reference.
SUMMARY OF THE INVENTION
[0004] A broad aspect of some embodiments of the invention relates to
various types of anastomotic connectors and clips.
[0005] An aspect of some embodiments of the invention relates to a one
piece clip adapted to form a part of an anastomotic connection, which
clip is self locking. Optionally, the clip is pre-stressed so that when
released, is closes and locks. Alternatively or additionally, the clip
includes multiple locking positions.
[0006] An aspect of some embodiments of the invention relates to a one
piece clip adapted to close and release from a delivery system when
allowed to close, by the delivery system.
[0007] A broad aspect of some embodiments of the invention relates to
locking two part connectors, in which an elongate hook section, having a
hook at its end, is pulled through a medallion section and locked to the
medallion section at its tip and the rest of the hook section removed,
for example by tearing. In an exemplary embodiment of the invention, a
plurality of two part connectors are used to complete an anastomosis,
with each such connector acting as a clip. One potential advantage of not
rigidly tying together the connectors is that the vessels of the
anastomosis are not constrained by the such tying and are free to find a
minimal stress-position and/or motion pattern.
[0008] An aspect of some embodiments of the invention relates to locking a
two part anastomosis connector, in which tearing of an extension off of a
hook section helps lock the hook section to a medallion section. In an
exemplary embodiment of the invention, the tearing causes some parts of
the hook section to distort and the hook section is configured so that
the distortion causes a width of one section to be increased relative to
a width of a passage in another section. In one example, the passage is
narrowed. Alternatively or additionally, the width of the section is
increased.
[0009] An aspect of some embodiments of the invention relates to a two
part connector in which an elongate hook section includes a slot which
engages a matching tab in a medallion section, which medallion section
travels along the hook section. In an exemplary embodiment of the
invention, the locking of the medallion section is within the slot.
Alternatively or additionally, the locking of the medallion is on the
outside of the hook section.
[0010] An aspect of some embodiments of the invention relates to a two
part connector in which the hook section includes elements that move to
effect the locking. Optionally, the medallion is passive with no parts
thereof moving or substantially distorting for the locking.
Alternatively, the medallion may have moving or distorting parts as well.
[0011] An aspect of some embodiments of the invention relates to a method
of locking a hook section to a medallion where the hook section includes
a first locking mechanism which engages a section of the medallion and
where the medallion includes a second locking mechanism which engages a
part of the hook section.
[0012] An aspect of some embodiments of the invention relates to a lock
mechanism for a hook section, in which a widened section of the hook
section includes an internal slot to allow the widened section to be
compressed when a medallion section travels over it.
[0013] An aspect of some embodiments of the invention relates to providing
a ring attachment on a medallion section. Optionally, the ring attachment
may be used to increase a size of an aperture meant for a hook section,
for example to assist in mounting the medallion on the hook section or to
assist removal therefrom. Optionally, the ring attachment is adapted to
be torn off, for example by pulling.
[0014] An aspect of some embodiments of the invention relates to a set of
clip sections provided as a single connector in which staggered tearing
times are provided. In an exemplary embodiment of the invention, the
individual connectors are designed such that when tearing forces are
applied, not all the connectors feel the forces at the same time. Thus, a
smaller force needs to be applied to tear all the connectors. In one
example, a single ring is used as a backing for all the medallions,
However, each hook section has a different distance between the location
where it is held by a pulling system and a location where the medallion
is locked. The hook sections with the shortest distance, are torn first.
Other variations may be provided, for example, different medallions may
have different thicknesses or different hook sections may have different
elongation properties or mechanical structures, allowing one hook section
to elongate more before it tears, while a less-elongating hook section is
torn before. Alternatively, the pulling system is skewed, pulling on some
hook sections before others. The tearing may be designed, for example, to
tear opposing legs together or serially, or to tear the legs in a
different order, for example around the connection, possibly only one and
possibly more than one leg at a time.
[0015] An aspect of some embodiments of the invention relates to an
anastomotic connector in which a plurality of pullers form a part of a
ring connector and pass inside the ring and, once released, pull blood
vessel tissue towards the connector, to complete an anastomotic
connection. Optionally, the pullers rotate alternatively or additionally
to retracting. Optionally, the pullers pierce blood vessel tissue.
Alternatively, the pullers do not pierce blood vessel tissue.
[0016] In an exemplary embodiment of the invention, the pullers are
attached to a connector body via a curved section that describes an arc
of greater than 270 degrees. Optionally, this curved section is long
enough so that the pullers can have a considerable motion without
exceeding elastic, super-elastic or shape memory properties of the
material from which the connector is made. Optionally, the curved section
flattens during the deployment.
[0017] There is thus provided in accordance with an exemplary embodiment
of the invention, a self-locking clip adapted for vascular tissue
connection, comprising:
[0018] a body;
[0019] a sharp extension on one side of the body and adapted to pierce
blood vessel tissue; and
[0020] a base on another side of said body, said base adapted to interlock
with said extension, at least to prevent retraction of said extension
from said bas after inserted,
[0021] wherein said clip is pre-disposed to assume a closed configuration
where said base locks to said extension. Optionally, said extension
defines a plurality of locking positions. Alternatively or additionally,
said base defines an aperture adapted to receive said extension.
Optionally, said aperture is adapted to guide said extension to be
locked.
[0022] In an exemplary embodiment of the invention, said clip is adapted
to be used as part of a set of a plurality of clips to complete single
anastomosis connection.
[0023] There is also provided in accordance with an exemplary embodiment
of the invention, a clip delivery system, comprising:
[0024] a plurality of clips adapted for vascular tissue connection, each
clip comprising: [0025] a body; [0026] a sharp extension on either
end of said body, [0027] wherein said clip is pre-disposed to form a "C"
shape;
[0028] an inner tube defining a plurality of slots; and
[0029] an outer tube axially movable with respect to said inner tube,
[0030] wherein said inner and outer tube define a receptacle for said
clip, said clip being released when said outer tube is retracted relative
to said inner tube and wherein said inner tube defines a slot adjacent
said receptacle, said slot adapted to receive a bent-back section of a
backwards pointing one of said extensions. Optionally, said body defines
an aperture and wherein said inner tube defines a matching protrusion to
said aperture and wherein said body curves when released, such that said
aperture is released from said protrusion.
[0031] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0032] a hooked element comprising: [0033] an elongate body; [0034] a
designated tear location structurally defined at a location along said
body; [0035] a hooked tip adapted to pierce a blood vessel; and
[0036] a base element adapted to lock to said hooked section at said
locking location,
[0037] wherein said hooked element is adapted to not tear vascular tissue.
Optionally, said hooked tip is adapted to not cut vascular tissue.
Alternatively or additionally, said hooked tip has the shape of a needle.
Alternatively or additionally, said hooked tip is manufactured by cutting
and smoothing a planar material.
[0038] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0039] a hooked element comprising: [0040] an elongate body; [0041] a
designated tear location structurally defined at a location along said
body; [0042] a designated locking location structurally defined at a
location along said body, [0043] a hooked tip adapted to pierce a blood
vessel; and
[0044] a base element adapted to lock to said hooked section at said
locking location,
[0045] wherein said designated tearing location is configured to enhance a
locking of said locking location. Optionally, said tearing location is
configured so that tearing causes the bending of at least one part of
said hooked element to narrow a passage of a portion of said base element
within said hooked element. Alternatively or additionally, said tearing
location is configured so that tearing causes the bending of at least one
part of said hooked element to widen a portion of said hooked element
which travels within said base element. Alternatively or additionally,
said tip is adapted to pierce vascular tissue without causing tearing.
[0046] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0047] a hooked element comprising: [0048] an elongate body having a
slot defined therein; [0049] a designated tear location structurally
defined at a location along said body; [0050] a designated locking
location structurally defined at a location along said body; [0051] a
hooked tip adapted to pierce a blood vessel; and
[0052] a base element adapted to lock to said hooked section at said
locking location and including a section that fits in said slot,
[0053] wherein said designated locking location is located in said slot.
Optionally, said hooked element comprises a second designated locking
location on an outside of said hooked element. Alternatively or
additionally, said tip is adapted to pierce vascular tissue without
causing tearing. Alternatively or additionally, said base element is
planar.
[0054] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0055] a hooked element comprising: [0056] an elongate body; [0057] a
designated tear location structurally defined at a location along said
body; [0058] a designated locking location structurally defined at a
location along said body; [0059] a hooked tip adapted to pierce a blood
vessel; and
[0060] a base element adapted to lock to said hooked section at said
locking location,
[0061] wherein said designated locking location is defined by at least one
active portion on said hooked element which engages a portion of said
base section. Optionally, said base element includes no portions that
move relative to a center of gravity of said base element during a
locking activity. Optionally, said base element is planar.
[0062] In an exemplary embodiment of the invention, said tip is adapted to
pierce vascular tissue without causing tearing.
[0063] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0064] a hooked element comprising: [0065] an elongate body; [0066] a
designated tear location structurally defined at a location along said
body; [0067] a designated locking location structurally defined at a
location along said body; [0068] a hooked tip adapted to pierce a blood
vessel; and
[0069] a base element defining a second locking location adapted to lock
to said hooked element, wherein both said base element and hooked element
each include at least one portion that moves during locking.
[0070] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0071] a hooked element comprising: [0072] an elongate body having an
axis; [0073] a designated locking location structurally defined at a
location along said body; [0074] a hooked tip adapted to pierce a blood
vessel; and
[0075] a base element having an aperture adapted to ride on said body,
said base element adapted to lock to said hooked element at said
designated locking location,
[0076] wherein said locking location comprises at least one widening on
said hooked element perpendicular to said axis and at least one aperture
formed in said body adjacent said widening.
[0077] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip adapted for vascular tissue
connection, comprising:
[0078] a hooked element comprising: [0079] an elongate body having an
axis; [0080] a hooked tip adapted to pierce a blood vessel; and
[0081] a base element having an aperture adapted to ride on said body and
wherein at least one section of said base element contacting said
aperture is adapted to be elastically moved to widen said aperture and
comprising: [0082] at least one holder adapted to widen said aperture
when pulled against a resistance of said hooked element in said aperture.
Optionally, said holder comprises an apertured holder. Optionally, said
aperture contains a thread.
[0083] In an exemplary embodiment of the invention, said holder is adapted
to be torn off said base element.
[0084] There is also provided in accordance with an exemplary embodiment
of the invention, a method of mounting a base element of an anastomotic
clip on a hooked element of an anastomotic clip, comprising:
[0085] placing said hooked element in an aperture of said base element;
and
[0086] pulling on a holder section of said base element to widen said
aperture.
[0087] There is also provided in accordance with an exemplary embodiment
of the invention, a method of demounting a base element of an anastomotic
clip on a hooked element of an anastomotic clip, comprising:
[0088] pulling on a holder section of said base element to widen an
aperture of said base element on which said hooked element is mounted;
and
[0089] removing said base element.
[0090] There is also provided in accordance with an exemplary embodiment
of the invention, a connector clip set adapted for performing a vascular
anastomotic connection, comprising:
[0091] a plurality of connector clips, each comprising: [0092] a hooked
element comprising: [0093] an elongate body having an axis, a first end
and a second end; [0094] a pulling point adapted to have a pulling force
applied to at said first end [0095] a hooked tip adapted to pierce a
blood vessel at said second end [0096] a resting point for a base
element between said ends; and [0097] a base element adapted to ride
on said body and stop at said resting point,
[0098] wherein a distance between said resting point and said pulling
point is different for different ones of said clips. Optionally, said
resting point is adapted to withstand a force of at least 1 Kg applied
from said pulling point.
[0099] There is also provided in accordance with an exemplary embodiment
of the invention, a pulling connector adapted for vascular tissue
connection, comprising:
[0100] a ring; and
[0101] a plurality of hooked elements having an elongate body and curved
into said ring,
[0102] wherein said elongate elements are pre-disposed to retract such
that they pull vascular tissue towards said ring to complete an
anastomotic connection. Optionally, said hooked elements rotate when
released. Alternatively or additionally, said curves flatten when
released.
[0103] In an exemplary embodiment of the invention, said hooked elements
are adapted to pierce blood vessel tissue without tearing.
[0104] In an exemplary embodiment of the invention, said ring defines a
plurality of recesses for said hooked elements.
[0105] In an exemplary embodiment of the invention, said ring is
substantially rigid.
[0106] There is also provided in accordance with an exemplary embodiment
of the invention, a method of deploying a tearing vascular anastomotic
connector having multiple tearing points, comprising:
[0107] tearing a first leg to complete a first part of an anastomosis; and
[0108] tearing a second leg after said first tearing to complete a second
part of said anastomosis. Optionally, the method comprises applying a
continuous force to said connector during said first and second tearing
and in between.
BRIEF DESCRIPTION OF THE FIGURES
[0109] Non-limiting embodiments of the invention will be described with
reference to the following description of exemplary embodiments, in
conjunction with the figures. The figures are generally not shown to
scale and any sizes are only meant to be exemplary and not necessarily
limiting. In the figures, identical structures, elements or parts that
appear in more than one figure are preferably labeled with a same or
similar number in all the figures in which they appear, in which:
[0110] FIG. 1A is a perspective view of a closed self-locking clip, in
accordance with an exemplary embodiment of the invention;
[0111] FIG. 1B is a side-cross-sectional view of a deployed clip forming a
part of an anastomotic connection, in accordance with an exemplary
embodiment of the invention;
[0112] FIGS. 2A-2C illustrate a process of using the clip of FIG. 1, in
accordance with an exemplary embodiment of the invention;
[0113] FIG. 3 illustrates a delivery system for deploying a plurality of
self-releasing clips, in accordance with an exemplary embodiment of the
invention;
[0114] FIGS. 4A and 4B show plan views of a hook section of a
hook-medallion connector, in accordance with an exemplary embodiment of
the invention;
[0115] FIG. 4C shows a deployed hook-medallion connector, in accordance
with an exemplary embodiment of the invention;
[0116] FIG. 4D shows a plurality of hook and medallion connectors, during
deployment, in accordance with an exemplary embodiment of the invention;
[0117] FIGS. 5A and 5B show alternative forward parts of hook sections, in
accordance with exemplary embodiments of the invention;
[0118] FIGS. 6A-6D show embodiments of hook sections with inner slots, in
accordance with exemplary embodiments of the invention;
[0119] FIG. 6E shows a medallion section suitable for riding on a hook
section of FIGS. 6A-6D, in accordance with an exemplary embodiment of the
invention;
[0120] FIGS. 7A-7D show embodiments of medallion sections that ride on a
slot of a hook section, in accordance with exemplary embodiments of the
invention;
[0121] FIGS. 8A-8E show embodiments of medallions sections having locking
to a hook section by one or more tabs of the medallion engaging the hook
section from its front and/or back side, in accordance with exemplary
embodiments of the invention;
[0122] FIGS. 9A-9C show medallions in which locking tabs lock into
apertures defined in a side of a hook section, in accordance with an
exemplary embodiment of the invention; and
[0123] FIGS. 10A-10E illustrate a puller connector and its use, in
accordance with an exemplary embodiment of the invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Self Locking Clip
[0124] FIG. 1A is a perspective view of a closed self-locking clip 100, in
accordance with an exemplary embodiment of the invention. FIG. 1B is a
side-cross-sectional view of a deployed clip 100. Clip 100 comprises an
extension 102 having a sharp point 103, that is adapted to pass through a
target vessel 120, in a minimally-traumatic manner and pass through an
aperture 106 in a base section 104 of clip 100. Optionally or
additionally, aperture 106 defines one or more engagement areas 112
and/or extension 102 defines one or more engagement areas 108, such that
clip 100 can lock, at least to prevent retraction of tip 103, in one or
more locking positions.
[0125] In an exemplary embodiment of the invention, aperture 106 comprises
a wide section marked with reference number 106 and a narrow section 110
where locking occurs. Optionally, the wider aperture section serves to
define a part of base 104 as a spring section which is pre-disposed to
oppose widening of slot 110. Optionally, slot 110 continues into a body
section 107 of clip 100, that connect the base and extension sections of
clip 100.
[0126] FIG. 1B is a cross-sectional view showing only one wall of a graft
vessel 122 and part of a wall of aorta 120. FIG. 1B shows a particular
eversion of graft vessel 122 on clip 100. However, in other embodiments,
graft 122 need not be everted and may be, for example, transfixed on
extension 102. The position of graft 122 relative to body 107 is
optionally determined by an optional tissue stop 118. If no such tissue
stop is provided and body 107 is narrow, then graft 122 may, for example,
lie entirely outside of vessel 120.
[0127] A potential advantage of not having a tissue stop, which advantage
may be practiced in other embodiments described herein if a tissue stop
is not used, is that the force that a physician applies on the graft
vessel can cause the vessel to selectively slide up. For example, if an
oblique connection is desired, pulling the vessel into position may cause
the vessel parts mounted on clips in the oblique angled section of the
anastomosis to slide up, while vessel parts on the acute angled sections
will not slide up. Such forces may be applied, for example, during the
anastomosis or after it is completed.
[0128] FIGS. 2A-2C illustrate a process of deploying clip 100, in
accordance with an exemplary embodiment of the invention. While a
plurality of clips are generally used, for clarity, only a single clip is
shown.
[0129] In FIG. 2A, only a tip 103 of clip 100 protrudes from a delivery
system 200. As will be clearer in the following figures, in an exemplary
embodiment of the invention, clip 100 is held between an outer tube
(visible) 202 and a mostly hidden inner tube 204. In an exemplary
embodiment of the invention, a graft vessel is provided through delivery
system 200, so that it exits via an aperture 206 at its end.
[0130] In an exemplary embodiment of the invention, the configuration of
FIG. 2A is used for eversion, with a graft (not shown) being everted over
tube 202 and, in the process, being transfixed by tips 103. It should be
noted that even though clip 100 has a tendency (elastic, super elastic or
shape memory, for example) to achieve the geometry of FIG. 2A, extension
108 is mostly straight, so that tip 103 does not bend away from the axis
of tube 202.
[0131] In FIG. 2B, inner tube 204 is advanced, so that all of extension
102 is advanced forward and released from between tubes 202 and 204 and
therefore, curves backwards. In an exemplary embodiment of the invention,
this configuration is used for engaging a target vessel, for example an
aorta. Delivery system 200 is placed into an aperture in the blood
vessel, for example in the configuration of FIG. 2A, and extension 102 is
released. Delivery system 200 is then pulled back, so that tip 103
engages the target vessel from inside. This step is considered complete
when all of tips 103, of all the clips used are seen to protrude from the
outside wall of the blood vessel. Alternatively, delivery system 200 may
be inserted into the target vessel when already in the configuration of
FIG. 2B, as there are no forward pointing sharp points or elements to
interfere with such motion.
[0132] In FIG. 2C, tube 202 is further retracted, so that base section 104
of clip 100 is released and can lock to extension 102. A property of
aperture 106 in accordance with some embodiments of the invention can be
see, that aperture 106 is inclined so that if extension 102 lands in a
wide section thereof and is pre-stressed to close towards body 107, the
sides of aperture 106 will guide such closing.
[0133] Also visible in FIG. 2C is a mechanism for holding clips 100, in
which a plurality of raised areas 210 define a plurality of recesses 208
between them. Each recess having the depth of the thickness of one clip
and adapted to contain one clip. When tube 202 lies over tube 204, the
clips are prevented from returning to their closed shape, except as they
are released.
Self Releasing Clip
[0134] FIG. 3 illustrates a delivery system 300 for deploying a plurality
of self-releasing clips 320, in accordance with an exemplary embodiment
of the invention. Clips 320 are two sided clips having a body 322 with
one extension on either end, 324 and 326. When released, as shown, the
clips close to form a "C" shape. The deployment process can be as in
FIGS. 2A-2C.
[0135] An exemplary delivery system 300 is shown, in which clips 320 are
held between an inner tube 304 and an outer tube 302. In an exemplary
embodiment of the invention, clips 320 are each maintained in an axial
position by a projection 310 of inner tube 304, which fits into a recess
or aperture 328 of clip 320. Optionally, when clip 320 is released, body
322 curves, curving aperture 328, thereby allowing projections 310 to
slide by clips 320.
[0136] It should be noted that unlike clip 100, clip 320 has two curved
extensions. In an exemplary embodiment of the invention, a plurality of
slots 312 are provided in tube 304, so that extension 324 can be bend all
the way back without distorting the clip in a manner which prevents
deployment to the correct shape. In one example, when held by delivery
system 300, the tip of extension 324 contacts the inner wall of tube 302,
extension 324 is bent into slot 312 and the rest of clip 320 lies flat or
is curved as does clip 100, in FIGS. 2A and 2B respectively. Optionally,
tube 302 is coated on the inside with a softer material, such as a
plastic, so that the point of extension 324, if made of metal, is not
blunted.
Medallion and Hook Connector
[0137] FIGS. 4A and 4B show a hook section 402 of a hook-medallion
connector, in accordance with an exemplary embodiment of the invention.
FIG. 4C shows a deployed hook-medallion connector 400, in accordance with
an exemplary embodiment of the invention. FIG. 4D shows a set of
connectors during deployment, prior to tearing thereof.
[0138] In a typically anastomosis, a plurality of hook-medallion
connectors 400 are used, surrounding the anastomosis location. Each
connector 400 comprises a hook section 402 and a medallion section 404.
When deploying, a forward section 406 of hook section 402 engages and
locks to medallion section 404 and the rest of hook section 402 is torn
off and removed from the body.
[0139] Deployment may be similar, for example to that of FIGS. 2A-2C,
except that instead of releasing a back section, hook sections 402 are
retracted until they lock and tear. An exemplary delivery system is
described in PCT publication WO 03/026475, the disclosure of which is
incorporated herein by reference. After deployment, the connectors may be
independent of each other, or be attached, for example by thin wires or
sutures.
[0140] Referring in greater detail to FIG. 4A, hook section 402 comprises
a body 410 having a slot 412 defined at one end thereof, and a tissue
engaging tip 414 defined at another end thereof. Slot 412 is provided as
an anchoring point for an engager (not shown) which retracts hook section
402 with sufficient force to tear it off of forward section 406. Tissue
engaging tip 414 is shown as flat, however, when deployed, it is curved
into a hook shape, as shown in FIG. 4C, for example. In an exemplary
embodiment of the invention, the hook shape is configured so that it is
about at the level of the plane of medallion 404, for example slightly
below or slightly above. The exact position may depend on the amount of
tissue trapped therein.
[0141] Referring in greater detail to FIG. 4B, forward section 106
comprises tip 414 and a tissue engaging section 420. Optionally, one or
more tissue stops (e.g., increased width sections) are provided to
control the slippage of tissue with respect to section 420. These stops
are not show but may be positioned, for example between tip 414 and stop
424, described below. A locking area 426 is provided for locking to
medallion section 404. One or more stop tabs 424 are provided to prevent
forward motion of medallion 404. Optionally, tabs 424 are made strong
enough to withstand the forces of tearing without substantial distortion,
for example, forces of 1, 2.5, 5, 10, 20, 25 or more Kg. One or more back
tabs 428 are provided to prevent medallion 404 from falling off of hook
section 402. As shown, back tabs 428 are inclined in the forward
direction and step-like in the backward direction. Optionally, the
step-like structure makes reverse passage of medallion 404 difficult,
while the inclined structure makes it easier. In an exemplary embodiment
of the invention, a slot 436 is provided between tabs 428, so that the
material of tabs 428 can be pressed into slot 436 while medallion 404 is
passed over it One or more slots 432 are provided behind tabs 428, to
define weakened areas 434, for tearing. Slot 436 optionally extends
between two such weakened areas.
[0142] In an exemplary embodiment of the invention, slots 432 and weakened
areas 434 are configured so that tearing forces will tend to cause tabs
428 to bend out rather than in. In the example shown, cut-out section 430
is provided to assist in such bending. The tearing action will generally
first elongate and then tear. In the configuration shown, this will tend
to cause tabs 428 to bend away from slot 436.
[0143] In an exemplary embodiment of the invention, tip 414 is
manufactured so that it does not tear vascular tissue. While tip 414 may
be made from a planar material, In an exemplary embodiment of the
invention, it is smoothed, for example using electro-polish so that the
only sharp section thereof is its needle like tip. Thus, it will tend to
not tear vascular tissue when inserted thereto.
[0144] Referring in greater details to FIG. 4C, medallion section 404
comprises a ring section 440 through which tissue and tip 414 pass and a
locking section 441 including an aperture 442 which rides on hook section
402. In the embodiment shown, aperture 442 is slightly undersized to
receive hook section 402 and is thus elastically predisposed to engage
hook section 402. In the embodiment shown, aperture 442 includes does not
completely encircle hook section 402, an opening 450 is provided.
Optionally, this allows a greater degree of movement for a pair of back
tabs 448 which press against a back side of hook section 402. One or more
removed sections 446 may be provided adjacent tabs 448, to define desired
elastic properties of tabs 448. In general it should be noted that as a
section is made thicker, a greater force is required to elastically
deform it. Further, depending on the geometry of the section, a certain
force may cause permanent distortion. Generally, sections that are longer
have a greater distance they can be distorted elastically. In an
exemplary embodiment of the invention, various removed sections are
provided to control elastic forces and amount of movement without
distortion, for example, a pair of removed sections 444 are provided
adjacent a tab 452 on a front side of aperture 442. The removed sections
sizes may be the same or may be different, depending, for example, on the
desired properties. It should be noted that while a symmetric medallion
is shown, an asymmetric design can be used as well. In an exemplary
embodiment of the invention, medallion section 404 is substantially
passive in that during locking and/or sliding, no parts of the medallion
move relative to the center of gravity of the medallion. Optionally, any
elastic ability of the medallion is to provide some leeway while mounting
it on the hook sections or for applying a constant force against the hook
section.
[0145] FIG. 4D shows a cross-sectional view of an exemplary anastomotic
connection, after locking and prior to tearing.
[0146] The forces applied during tearing can be quite large, for example,
2.5 Kg per hook section, if all the hook sections are torn together, this
might require a robust delivery system and/or cause movement by the user.
In an exemplary embodiment of the invention, a connector set for an
anastomosis is provided in which not all hooks are designed to bear
tearing forces at a same time, thus a smaller force can be applied.
Alternatively or additionally, the hook tearing may be staggered for
other reasons, such as the ability to connect one side of the anastomosis
first, for example for an oblique connection.
[0147] In some embodiments of the invention, the delivery system is
designed to bear first on some hook sections and then on others.
Alternatively, the hooks sections and/or medallion sections are designed
to achieve a desired effect. In an exemplary embodiment of the invention,
a set of connectors, for example arranged in a delivery systems is
provided in which each hook has a desired relative tearing time.
[0148] In an exemplary embodiment of the invention, the distance between
stop 424 and slot 412 is different for different hooks. The hooks with a
shorter distance will feel a tearing force applied between those two
points, first. Alternatively, slot 412 is made of different lengths for
different hooks. Alternatively or additionally, different thickness
medallions are provided. Alternatively or additionally, different
elongation properties for different hook section are provided, for
example, a bent ribbon section may be provided in one hook section to
allow its greater elongation. Alternatively, chemical, mechanical and/or
heat treatments are used to vary elongation.
Hook Section Variations
[0149] As can be appreciated, many variations on hook section 402 can be
provided within the scope of the invention. for example, FIGS. 5A and 5B
show alternative forward parts of hook sections, in accordance with
exemplary embodiments of the invention. FIG. 5A shows an embodiment where
a slot 536 underlies a locking area 526 as well as back locking tabs 528.
Also, in this embodiment, a weakened area 534 is defined by cut outs on
one or both sides, such as a widening of slot 536 and/or a narrowing of
the body of the hook section from outside. Optionally, the part of slot
536 underlying locking area 526 is used for an inner locking of the
medallion section, provided by a tab of the medallion section entering
slot 536. Example medallions with a tab that locks to a slot underlying a
locking area are described below. Alternatively or additionally, the
elongated slot 536 increases the flexibility of back locking tabs 528. An
elongated slot, however, may cause leakage of blood along the slot.
[0150] FIG. 5B shows a variation in which a slot 586 serves only to define
a pair of weakened areas 584. This is an extreme example of a
flexibility/sealing tradeoff, in that there will be no leakage when the
slot is not in the blood vessel.
[0151] In another variation (not shown) a portion of the hook section is
adapted to bend out of the plane of the hook and thus create an effective
thickening of the hook. Such a thickening can also prevent reverse
movement of the medallion on the hook.
Inner Slot Engagement
[0152] In FIGS. 4A-5B, the medallion section slides along the outside of
the hook section. In some alternative embodiments, the medallion section
at least engages a slot defined on the inside of the hook section
[0153] FIGS. 6A-6D show embodiments of hook sections with inner slots, in
accordance with exemplary embodiments of the invention. FIG. 6E shows a
medallion section suitable for riding on a hook section of FIGS. 6A-6D,
in accordance with an exemplary embodiment of the invention.
[0154] Referring to FIG. 6A, a hook section 602 includes a body 610 with a
forward section 606 shown in more detail in FIG. 6B. An optional back
slot 612 is provided for engagement by a puller. Alternatively, a
different structure, such as a "T" shaped end, may be used. A slot 637
for a medallion is provided along body 610 and into forward section 606.
[0155] Referring to FIG. 6B, forward section 606 has only inner locking
mechanisms. Locking of a tab section of the medallion is provided in a
locking area 625 which is a continuation of slot 637. One or more inner
backwards tabs 629 are inclined so that forward motion along slot 637 is
possible, while backwards motion once locking area 625 is reached, is
difficult or impossible. Weakened areas 634 are optionally weakened by
the provision of weakening apertures 632. It should be noted that in this
and other embodiments, other methods of weakening may be used, for
example, thinning, aperture forming, heat or chemical treatment and/or
mechanical treatment.
[0156] While locking area 625 may have a length equal to the thickness of
a medallion section, optionally, a greater length is provided, for
example to allow the medallion some freedom of rotation and/or motion.
[0157] FIG. 6C shows a variant forward section 660, in which an external
advancement stop 664 is provided to stop forward movement of the
medallion and/or to stop advancement of tissue along section 660. A pair
of inside backwards locking tabs 669 are shown for stopping reverse
movement of a medallion out of a locking area 665. Optionally, the
inclined nature of advancement stops 664 serves the purpose of providing
an elastic stop whereby if the force applied to the medallion is
sufficient, a small advancement is possible.
[0158] A pair of weakened areas 674 are defined by a widening 672 in slot
677. It should be noted that when tearing weakened areas 674, locking
tabs 669 will tend to bend inwards.
[0159] In the particular embodiment shown, slot 677 is narrower than slot
665. In other embodiments, they may be the same width or slot 677 may be
wider. Optionally, for example as will be shown below for some designs of
medallions, a first tab section of the medallion rides in slot 677 and
when slot 677 widens into slot 665, additional tab sections of the
medallion enter slot 665. Optionally, for some medallion designs, no
parts of the medallion are ever inside slot 677, except for locking area
665, when locking occurs.
[0160] Another difference which can be noted between section 606 and
section 660, is that a body 620 of FIG. 6B is thinner than a body 678 of
FIG. 6C. This variation may depend, for example, on the robustness of the
blood vessels being attached and/or the size of the anastomosis.
[0161] FIG. 6D shows a forward section variation 680, in which a locking
area 686 is defined between at least one forward outside tab 684 and at
least one backward outside tab 688. A weakened area 694 is defined by a
weakening aperture 692. Optionally, a slot 697 continues (not shown)
adjacent locking area 686, thereby providing an inner locking area.
Alternatively, in the embodiment shown, a section of the medallion stays
in slot 697, against an end 698 thereof. Alternatively, slot 697 is used
for the tearing mechanisms. As can be appreciated, the forces applied
during tearing are considerable and might conceivably damage the
connector. In an exemplary embodiment of the invention, tearing forces
are not applied to the medallion or to locking area 686. Instead, a tab
of the deliver system rides in slot 697. Tearing is achieved by pulling
back on the hook connector from its far end (e.g., 612, FIG. 6A) while
maintaining the tab in place against end 698.
[0162] FIG. 6E shows a medallion 640 including a tab section 650 which can
ride along a slot in a hook section, such as slot 637. While a ring
section 640 is shown, it should be noted that in some applications this
ring section can be replaced by a sharp extension adapted to impale
tissue, for example, an extension of tab 650 bent into the figure plane
towards the tip of the hook section. More examples of such a design and
other clips designs are provided in a PCT application filed by a same
applicant "By-Pass inc.", in the Israel receiving office, on same date as
the instant application, having a title of "Sliding Surgical Clip" and
having an attorney docket number of 088/03506, the disclosure of which is
incorporated herein by reference. Furthermore, while a locking section
641 is shown, in some embodiments of the invention, this section is
dispensed with and riding and locking are provided by tab 650. In the
embodiment shown, however, a pair of optional forward locking tabs 648
are shown which urge against parts of the hook section that ride in an
area 642 adjacent tabs 648. Alternatively or additionally, backwards tabs
652 are provided for a similar function. Locking area 641 optionally
functions as an elastic spring to urge the tabs against the hook section,
optionally into apertures or cut-outs defined in the hook section for
that purpose.
Slot Riding Medallion Variations
[0163] FIGS. 7A-7D shows embodiments of medallion sections that ride on a
slot of a hook section, in accordance with exemplary embodiments of the
invention;
[0164] FIG. 7A shows a medallion 700, in which a tab 702 is adapted to
ride inside slot 337, for example. One or more front tabs 704 are
optionally provided to urge against the hook section, optionally locking
into apertures of the hook section. A ring section 706 optionally also
serves as a spring for tabs 704. An alternative locking mechanism is that
walls 703 on either side of tab 702 engage a locking area such as area
686.
[0165] FIG. 7B shows a medallion 720, in which a tab riding section 722
includes a mushroom extension 723, to prevent it from slipping off slot
637. A pair of side tabs 728 are provided to apply force from the sides
of the hook section. Ring 726 optionally provides tabs 728 with some
elasticity. Medallion 720 is optionally mounted by distorting extension
723 during mounting.
[0166] FIG. 7C shows a medallion 740, which has no ring. Side and/or
forward pressure on the hook section are provided by extension sections
744 (forward) and 748 (side), which receive their elasticity from a
spring section 750.
[0167] FIG. 7D shows a medallion 760 similar to medallion 740 of FIG. 7C,
including a ring section 766. In an alternative embodiment, a mushroom
section 763 of a riding tab 762 is extended to act as a ring section
(e.g., to receive the tip of the hook section and/or to serve as a stop
to prevent tissue motion).
Front and/or Back Locking Medallion Variations
[0168] FIGS. 8A-8E show embodiments of medallions with means for locking
to a hook section by one or more tabs of the medallion engaging the hook
section from its front and/or back side, in accordance with exemplary
embodiments of the invention.
[0169] FIG. 8A shows a medallion 800, in which a hook section fits in an
aperture 802 thereof. When the hook section is to be locked, an aperture
of the hook section is moved to be adjacent a forward locking tab 804 of
medallion 800 and is urged into the aperture of the hook, by virtue of
the original width of aperture 802 being smaller than a thickness of the
hook. A spring section 808 optionally provides elasticity for this
urging. An optional ring section 806, is shown as well.
[0170] FIG. 8B shows an alternative medallion 820, in which both a forward
locking tab 824 and a backwards locking tab 825 are provided projecting
into an aperture 822 for the hook section. In the embodiment shown, a
spring 828 is provided only for backwards locking tab 825. Alternatively
or additionally, a spring is provided for tab 824.
[0171] FIG. 8C shows an alternative medallion 840, in which a forward
locking tab 844 and a backwards locking tab 845 are provided projecting
into a hook aperture 842. One or both the tabs may be optional, for
example, if the hook section includes a locking tab. An optional side
section 849 optionally defines the width of aperture 842. Optionally,
section 849 is elastically urged into aperture 842. Optionally, a
pull-ring 850 is provided, which can be used to open aperture 842 by
pulling on a spring 848 which advances tab 845 into aperture 842.
Optionally, pull ring 850 is used during mounting, to widen the aperture.
Alternatively or additionally, pull ring 850 is used to suture the
medallions together. A weaken section 852 is optionally provided to
assist in removing pull ring 852, for example by bending or by tearing.
[0172] While a closed ring section 846 is shown, in other embodiments, the
ring section is open, for example defining to fingers or arcs away from
aperture 842.
[0173] FIG. 8D shows an alternative medallion 860, in which only a
backwards locking tab 865 is provided. Optionally, however, a slot 874 is
provided in a body ring 866, which slot enables ring 866 to provide
elasticity for two side tabs 869 that engage the hook section from the
sides. Optionally one or more side horns 876 are provided near tab 865,
to prevent over advancing of tab 865 into the hook section. Alternatively
or additionally, such circular cutouts are provided as part of a cutting
design process which takes a minimum cutting radius into account,
especially when there is a need for straight lines.
[0174] In this variation, a pull-ring section 870 is ellipsoid rather than
round.
[0175] FIG. 8E shows an alternative medallion 880, in which a forward
locking tab 884 is long enough to completely pass through a matching
aperture in the hook section. A pair of tabs 889 is optionally provided
to urge the hook section onto tab 884. Due to the large distance of
motion, in an exemplary embodiment of the invention, a pair of long
springs 888 are provided, which attach to the far side of a ring section
886. Optionally, tab 884 extends from ring section 886.
Side Aperture Medallion
[0176] In some embodiments of the invention, locking is provided by a tab
of the medallion fitting into a narrowing of the hook section. Connector
400 is an example of this mechanism, in which the "narrowing" is made by
providing a widening on either side of the locking area. In alternative
embodiments, the width of the hook section is relatively except for a
narrowing section. While in connector 400, the medallion section was not
required to cooperate, In the embodiments of FIG. 9A-9C, the medallion
actively urges tabs into a narrowing (relative or absolute) of the hook
section.
[0177] FIG. 9A shows a medallion 900 in which a pair of side locking tabs
912 lock into apertures or notches (e.g., a narrowing) defined in a side
of a hook section, in accordance with an exemplary embodiment of the
invention. A pair of springs 908 are adapted to urge tabs 912 towards an
aperture 902 where the hook section rides. Optionally, springs 908 allow
tabs 912 to be moved sideways as well as forwards and backwards. This
allows the dimensions of aperture 902 to be limited by tabs 912, even
before locking. Optionally, a ring section 906 provides some sideways
elasticity, which sideways motion is made possible by a slot 910
separating springs 908 from each other.
[0178] FIG. 9B shows an alternative medallion 920, in which an aperture
902 for the hook section is defined on either side by a side tab 932, by
a front tab 924 and by a back tab 925. Optionally, back tab 925 is
elastically urged into aperture 922 by a spring 927. Alternatively or
additionally, front tab 924 is elastically urged into aperture 922 by a
spring 929. Alternatively or additionally, locking is provided by side
tabs 932, which are mounted on springs 928, attached to ring 926.
[0179] FIG. 9C shows an alternative medallion 940 similar to that of FIG.
9B, in which a pair of springs 947 that urge a backwards tab 945 into an
aperture 942 are more pronounced. Similarly, a pair of springs 949 which
urge a front tab 944 into aperture 942 are also more pronounced. In this
embodiment, the increased prominence of the springs comprises increased
length caused by additional bends, which allow for more elastic motion.
Puller Connector
[0180] FIGS. 10A-10E illustrate a puller connector 1000 and its use, in
accordance with an exemplary embodiment of the invention. FIGS. 10A and
10B show connector 100 in pre-deployed and post-deployed configurations,
with no blood vessels attached. In an exemplary embodiment of the
invention, connector 1000 is pre-stressed to go from one configuration to
the other, for example, being elastic, super elastic or shape memory.
Alternatively, it may be plastically deformed to pass between
configurations, for example by pulling on looped body sections 1006,
described below.
[0181] Connector 1000 comprises a ring 1002 to which are attached a
plurality of pullers 1004. In an exemplary embodiment of the invention,
pullers 1004 have looped bodies 1006 with forward sections 1008 which
extend into ring 1002. Forward sections 1008 optionally comprise hooked
ends 1010, which may be, for example, adapted to pierce blood vessel
tissue with minimum trauma and/or tearing. Alternatively or additionally,
at least some of ends 1010 are adapted to not pierce blood vessel tissue,
for example being flattened. Alternatively or additionally, at least some
of ends 1010 are adapted to pierce tissue only a certain distance, for
example by being forked and/or by including tissue stops (not shown)
which widen ends 1010.
[0182] Optionally a recess 1012 is provided in ring 1002 to receive hook
1010 when puller 1004 is retracted. As shown, the recess is approximately
the width of hook 1010. Alternatively, it may be wider, for example to
prevent pinching of tissue between hook 1010 and recess 1012.
[0183] FIG. 10B shows connector 1000 with pullers 1004 retracted. In an
exemplary embodiment of the invention, the length and shape of pullers
1004 allows a relatively long pulling motion to be provided on connector
1000 itself, without requiring a specialized delivery system beyond that
required for releasing connector 1000 to pull on pullers 1004.
Alternatively or additionally, the shape of pullers 1004 allows a
rotational movement to be carried out by hooks 1010. Optionally, a ring
1002 is not provided and is either dispensed with or provided as part of
the delivery system. In this case, the base sections of pullers 1004 are
optionally made wide, so that they apply force to a relatively large
section of the blood vessel with which it is in contact. Alternatively,
ring 1002 is made radially expandable, for example, using expandable cell
sections between adjacent pullers.
[0184] It should be noted that FIG. 10B shows hooks 1010 lying inside of
recesses 1012. However, if recesses 1012 are not wider than shown, the
existence of vascular tissue between hook 1010 and recesses 1012 may
prevent such a configuration. Alternatively, if hooks 1010 pierce the
vascular tissue, such configuration, as shown, is possible, with all of
the vascular tissue lying within ring 1002.
[0185] FIGS. 10C-10E show the deployment of connector 1000, in one design
variation thereof, where the pullers are not substantially rotated by the
pulling. In some cases, the hooks rotate, for example, 10 degrees, 30
degrees, 50 degrees or any intermediate or large amount of rotation.
[0186] In FIG. 10C, a graft vessel 1040 is everted and mounted on hooks
1010 and hooks 1010 are inserted into a target vessel 1042. The delivery
system is optionally retracted to engage target vessel 1042 by hooks
1010.
[0187] In FIG. 10D, hooks 1010 have retracted sufficiently to pierce
target vessel 1042 and to push vessel 1040 hard enough against ring 1002
so that graft vessel 1040 is also pierced by hooks 1010 (a second time).
if the everted section of graft vessel 1040 is short enough, no second
piercing will occur.
[0188] FIG. 10E shows an optional further retraction configuration, in
which hooks 1010 pass through recesses 1012 (not shown) in ring 1002.
[0189] The following documents, the disclosures of which are incorporated
herein by reference describe connectors, delivery systems and/or other
tools and methods which are useful in conjunction with embodiments of the
prevent invention:
[0190] PCT/IL02/00790, filed on Sep. 25, 2002, now published as WO
03/026475;
[0191] U.S. Ser. No. 60/492,998 filed on Aug. 7, 2003.
[0192] PCT/IL02/00215, filed on Mar. 18, 2002, now published as WO
02/074188;
[0193] PCT/IL01/01019, filed on Nov. 4, 2001, now published as WO
02/47532;
[0194] PCT/IL01/00903, filed on Sep. 25, 2001 now published as WO
02/30172;
[0195] PCT/IL01/00600, filed on Jun. 28, 2001, now published as WO
02/47561;
[0196] PCT/IL01/00267, filed on Mar. 20, 2001, now published as WO
01/70091;
[0197] PCT/IL01/00266, filed on Mar. 20, 2001, now published as WO
01/70090;
[0198] PCT/IL01/00074, filed on Jan. 25, 2001, now published as WO
01/0119;
[0199] PCT/IL01/00069, filed on Jan. 24, 2001, now published as WO
01/70118;
[0200] PCT/IL00/00611, filed on Sep. 28, 2000, now published as WO
01/41624;
[0201] PCT/IL00/00609, filed on Sep. 28, 2000, now published as WO
01/41623,
[0202] PCT/IB00/00310, filed on Mar. 20, 2000, now published as WO
00/56228;
[0203] PCT/IB00/00302, filed on Mar. 20, 2000, now published as WO
00/56227;
[0204] PCT/IL99/00674, filed on Dec. 9, 1999, now published as WO
00/56223;
[0205] PCT/IL99/00670, filed on Dec. 8, 1999, now published as WO
00/56226;
[0206] PCT/IL99/00285, filed on May 30, 1999, now published as WO
99/62408; and
[0207] PCT/IL99/00284, filed on May 30, 1999, now published as WO
99/62415. The disclosure of all of these applications, which designate
the US and were filed in English, are incorporated herein by reference.
[0208] In addition, a PCT application filed on same date with the present
application, by applicant "By-Pass Inc.", and describing anastomotic
connectors is "Sliding Surgical Clip", attorney docket number 088/03506,
the disclosure of which is incorporated herein by reference. A PCT
application filed on same date with the present application, by applicant
"By-Pass Inc.", and describing leg arranging systems is "Anastomotic Leg
Arrangement", attorney docket number 088/03504, the disclosure of which
is incorporated herein by reference.
[0209] A provisional application filed on even date with the instant
application, by applicants Loshakove, et. al and having attorney docket
number 088/03695 and title "Bypass Punch Anastomosis Delivery System" is
also incorporated herein by reference and describes an exemplary delivery
system.
[0210] A clip or a connector may be manufactured of various materials,
including for example, metals (e.g., stainless steel, NiTi alloys and
titanium), plastics and bio-absorbable materials. Optionally, the clip is
formed of a material that exhibits elastic, super elastic and/or shape
memory properties.
[0211] Some of these applications describe anastomosis delivery systems
and hole making apparatus and/or other device useful in cooperation with
the present invention. Some of these applications describe delivery
systems in which separate steps are provided for retracting and tearing,
and even, in some embodiments, for advancement of medallion sections.
[0212] The above described clips and connectors and their use may be
varied in many ways. For example, the hook sections and/or the medallions
may be interconnected before or after the anastomosis, for example, using
a flexible element, such as a suture, or a rigid element, such as a metal
bar.
[0213] In an exemplary embodiment of the invention, the tips that are
designed to penetrate blood vessel tissue are sharpened to minimize
trauma to the blood vessels, during attaching, and especially to reduce
tearing and/or dissection. For example, the tips may be formed to be
needle like, so that they have no edges that can tear nearby tissue,
except when inserted, tip first. Such forming may be, for example, by
electro-polishing.
[0214] While the above clips have been described in general for any type
of blood vessel, it should be appreciated that particular modifications
may be desired for certain vessel types. For example, the aorta is
thicker, while a coronary vessel is thinner, thus suggesting different
amounts of space in the clip. For example, an aorta may be 3 mm thick,
while a coronary vessel may be less than 1 mm thick.
[0215] In an exemplary embodiment of the invention, clip 100 is between
0.17 mm and 0.2 mm thick, is 0.4 mm wide on its body and 0.8 mm wide at
its base and curves in a radius of 0.8 mm. With reference to FIG. 4, a
space between the hook section and the medallion after locking can be,
for example, 0.25 mm. The hook can be, for example, between 0.15 and 0.17
mm thick and between 0.29 and 0.35 mm wide. The medallion can be, for
example, 0.4 mm thick with an area about 0.8 mm by 0.6 mm. These sizes
are only exemplary and are intended to give a measure of the size of the
elements involved. Each such dimension can be, for example, twice as
large or half the size, depending on the particular application
[0216] It should be noted that the term "connector" should be construed
broadly to include various types of connectors, including one part, two
part and multiple part connectors, some of which when deployed, result in
a plurality of individual clip-like sections.
[0217] The term "eversion", where used means not only complete eversion of
180 degrees, but also partial eversion or flaring, for example of 90
degrees. Also, in some embodiments, mounting without eversion is
provided.
[0218] Measurements are provided to serve only as exemplary measurements
for particular cases. The exact measurements stated in the text may vary
depending on the application, the type of vessel (e.g., artery, vein,
xenograft, synthetic graft), size of connector, shape of hole (e.g.,
incision, round) and/or sizes of vessels involved (e.g., 1 mm, 2 mm, 3
mm, 5 mm, aorta sized).
[0219] In some embodiments, one or more of the devices, generally
sterilize, described above, are packaged and/or sold with an instruction
leaflet, describing the device dimensions and/or situations for which the
device should be applied. Also within the scope of the invention are
surgical kits comprising sets of medical devices suitable for making
anastomotic connections.
[0220] It should be appreciated that the above may be varied and still
fall within the scope of the invention, for example, by changing the
order of steps or by providing embodiments which include features from
several described embodiments or by omitting features described herein.
Section headings where are provided are intended for aiding navigation
and should not be construed to limiting the description to the headings.
[0221] When used in the following claims, the terms "comprises",
"comprising", "includes", "including" or the like means "including but
not limited to".
[0222] It will be appreciated by a person skilled in the art that the
present invention is not limited by what has thus far been described.
Rather, the scope of the present invention is limited only by the
following claims.
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This office represents
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would have been immediately visible and obvious to anyone who spoke and
interacted with him because he had incontinence problems, an eye that bulged
out of its socket, and fell frequently.
The defendants, fearing significant damages settled the case to avoid potential for significant
damages. Today Ms. Washington is happily living at her home with a comfortable mortgage
payment.
Mitch Abdallah, Esq.
Criminal Defense Attorney Steven Creed has decided that starting fresh would be best for him and his newly adopted son. After tragedy has left Steven the guardian of his best friends young son, and after discovering a distant cousin, Steven leaves his busy law office in Denver and moves to Stone Creek, Arizona. Comfortably well off with the inheritance from his mother and grandfather, Steven buys an old run down ranch out side of town and opens a pro bono law office. Never had he expected to meet and fall for the county Prosecutor.
Most of the attention to the Tucson shootings on Jan. 8, 2011 is focused on Gabrielle Giffords. Not only is Giffords a sitting congress woman, but her miraculous survival after having been shot through the head at close range made that fact in itself, newsworthy.
The Padres infield is in a bit of flux these days. Their best offensive player, Adrian Gonzalez, still does have trade rumors swirling all around him, and it is only a question of when, not if, Gonzalez gets dealt. It appears very unlikely that their nominal double play combination (Eckstein and Tejada) are coming back as well. The only infielder that is secure in his starting job is 3b Chase Headley.