CA1233719A - Two-piece tissue fastener with ratchet leg staple and sealable latching receiver - Google Patents

Two-piece tissue fastener with ratchet leg staple and sealable latching receiver

Info

Publication number
CA1233719A
CA1233719A CA000456772A CA456772A CA1233719A CA 1233719 A CA1233719 A CA 1233719A CA 000456772 A CA000456772 A CA 000456772A CA 456772 A CA456772 A CA 456772A CA 1233719 A CA1233719 A CA 1233719A
Authority
CA
Canada
Prior art keywords
leg
receiver
tissue
fastening member
portions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000456772A
Other languages
French (fr)
Inventor
Robert H. O'holla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ethicon Inc
Original Assignee
Ethicon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ethicon Inc filed Critical Ethicon Inc
Application granted granted Critical
Publication of CA1233719A publication Critical patent/CA1233719A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
    • F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
    • F16B5/0642—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship the plates being arranged one on top of the other and in full close contact with each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064—Surgical staples, i.e. penetrating the tissue
    • A61B17/0643—Surgical staples, i.e. penetrating the tissue with separate closing member, e.g. for interlocking with staple
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064—Surgical staples, i.e. penetrating the tissue
    • A61B2017/0647—Surgical staples, i.e. penetrating the tissue having one single leg, e.g. tacks

Abstract

Abstract of the Disclosure An absorbable fastener is provided to hold together portions of mammalian tissue and includes a T-shaped fastening member and a receiver adapted to receive the leg of the fastening member. The fastening member leg has a plurality of resilient frustoconical members. One of the frustoconical members cooperates with a retaining ring in a bore of the receiver to effect engagement of the fastening member and receiver. The adjacent frustoconical members sealingly engage the receiver and isolate the retaining ring from the body fluids and tissue.

Description

~33'731 ~

DESCRIPTION
Technical Field .
This invention relates, in general, to the fas-tening together of portions of tissue in surgical procedures A
Background of the Invention In various surgical procedures, fasteners in the formof staples or the like are employed for hold-ing tissue portions together to facilitate healing of a wound or incision. For example, a locking staple, having a tongue and groove structure by which the staple is locked, is disclosed in U.S. Patent No.
2,881,762. A metal staple especially adapted for ligating blood vessels is disclosed in U.S. Patent 15 No. 3,079,608. International Patent Application No.
PCT/SU79/00049, which is made available to the publi~, discloses a variety of fastening devices and instru~
ments for performing circular anastomoses on the large intestine. The aforementioned disclosures serve as examples of a wide variety of tissue fastening devices and techniques that may be employed in general and/or specific ~urgical situations.
One common type of fastening device for joining or holding together soft tissue portions is the gener-ally "U"-shaped staple which is typically fabricated from a suitale metal. Such staples, althrough gener-ally described as having two legs joined to define a "U"-shape when unclinched, may also be regarded as having a configuration of an "open" loop when un-clinched. The legs need not necessarily be parallelbut are typically adapted for penetrating the tissue portions and for receiving between them some of the tissue material.

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Other examples of V-shaped or open loop staples, as well as of methods and instruments for applying such staples to tissue, are disclosed in UOSO patent Nos. 3,252,643, 3,482,428, 3~692~224,
3,790,057, 31795~034~ 3,8~9,683, ~,lg8,982,
4,316,468, and 4,319,.576.
:, Other tissue fastening devices have been proposed and differ from staples per se in that these ~' other devices may have a plurality of components and do not have to be clinched in the manner used to set a staple. One such device is disclosed in U.S.
Patent NoO 4,060,089 and includes a fastener strip provided with a plurality of longitudinally spaced, parallel prongs which are adapted to penetrate two ~: 15 overlapped tissue portions from one side so that the distal ends of the pron~s project from the other side . of the tissue portions.
; The fastener device further includes a retainer strip which is adapted to be placed on the other side of the tissue portions opposite the fastener strip to engage the ends of the projecting fastener strip prongs and thus secure the tissue portions tightly between the fastener ~trip and the retainer strip. The retainer ~trip defines frustoconical openings for receiv~ng the fastener strip prongs which each include a plurality of spaced~apart, frustoconical engaging members for engaging the retainer strip a~ a d~sired position relative to the pronqs. This provides for the ~' 30 eapability of adjusting the distance between the fastener strip and khe retainer strip. Such a fastening device may be fabricated from a biodegradable or absorbablè material~

,~

- :

~23~37~9 i We also know of another tlssue fastening device ! having a plurality of components and wherein the fas-teners are made from various polymeric materials and the legs of the U-shaped staple portion of the fastener have a taper to improve the penetration of the staple into tissue.
i Although many of the above-discussed types of tissue fastening devices and techniques are satisfactory in various applications, there is a need :~ 10 to provide an improved two-piece fastenin~ device, especially one completely fabricated from absorbable materials.
Also, it would be desirable to provide an improved fastening device fabricated from absorbable materials that can provide primary approximation of the tissue edges to insure that the tissue edges are in continuous contact.
~, When designing a two-piece fastener fabricated from absorbable materials, care must be ~ 20 taken to ensure that the two-pieces will remain ::: together in clamping relationship on the tissue --even as the fastener material ~egins to be absorbed , by the body. Thus, it wold be desirable to provide an impro~ed two-piece tissue fastener that can be ~5 fabricated from absorbable materials and that has a latching mechanism that will remain functional for a sufficiently long time period as the fastener :~ ~ material is bei~g absorbed.
Fur~her, ~uch an improved fastener should : ~0 ~provide a desired amount of hemostatic oompression to minimize bleeding, but allow ~ome ~ollateral blood circulation to the wound or inci sion edges of the tissue to promote healing. In addition, such an proved fastener should have the capability to 35 accommodate varying tlssue thicknesses and should 7~3 leave as little tissue cuff or margin as possible in effecting the joining of the tissue.
Further, it would be beneficial if such an improved fastener had a configuration ~hat would enable the fastener to be fabricated with as ~mall a size as possible to minimize dosage. Also, another desirable feature of such an improved fastener would be a fastener ~onfiguration that minimizes the possible sites of formation of pockets of infection in the tissue.
Further, such an improved fastener would desirably provide the surgeon with tactile f~edback and compensating control during the application of the fastener.
Finally/ such an improved fastener should have the capability for maintaining the tissue portions in approximation and compression for a minimum of 21 days in v_v~.
It would also be advantageous to provide such a fastener with a design that would facilitate its application ~o the tissue portions with a simple yet effective method. It would also be desirable if the improved fastener oould readily accommodate application by means of an appropriately design~d instrument.
Su_ma~y_o~ the Invention An impro~ed fastener is provided to hold together portions of mammalian tissue, such as are defined by a wound or incision, to facilitate healing : 30 of ~he wound or in~i ion.
The fastener include~ a fa~tenin~ member and :a cooperating receiver~ The fastening member includes at ~east one leg with a distal end adapted to be pa~ed through and project from the tissue : 35 portio;is. The fastening member also includes a ,, ~33~7~ 3
-5 tissue clamp member connected to the leg and adapted to lie substantially against one of the tissue portions. ~he leg has on its exterior along at least a portion of its length a plurality of sealing : 5 members each defining 1) a resilient, annular sealing portion lying generally ~n a plane substantially normal to the longitudinal axis of the ley and 2) a surface tapering inwardly from the annular ~ealing portion towards the distal end of the leg.
A receiver is adapted to be disposed against the other of the tissue portions opposite the fastening member. The receiver defines an aperture therein for receiving the fastening member leg after the leg has been inserted through the tissue ~ 15 portions. The receiver defines an annular retaining : ring on the inside surface of the aperture for engaging the annular sealing portion of one of the sealing members of ~he leg to prevent withdrawal of the leg from the aperture after the leg has been received in the receiver with the sealing portions of : adjacent sealing me~bers sealingly engaging the surface of the receiver in the aperture.
To join the tissue portions with the fastener, the two tissue portions are first approximated in a generally face-to-face relationship. Next, the fastening member ~s positioned on one side of the tissue portions with the leg oriented at an appropriate angle to pen~trate the ~i~sue por~ions. The receiver is positioned on the other side of the tissue por~ions opposite the : ~ fastening member and with the aperture generally in alignment with the fastening member leg.
Relative movement is then effected between ~he fastening member on the one hand and the tissue portions and receiver on the other hand to cause ~E$~-562 ~33~7~

penetration of the tissue portions by the fastening member leg and to cause a portion of the fastening member leg to be received within the receiver.
The relative movement is effected until the clamp me~ber is disposed against the surface of one of the tissue portions and until the receiver is disposed against the other of the tissue portions.
At this point, the retaining ring of the receiver is engaged by one of the annular sealing portions on the fastening member leg and prevents separation of the fastening member and receiver. Adjacent seal-ing portions on either side of the engaged sealing portion isolate the engaged sealing portion from the body tissue and prevent immediate absorption of the engaged sealing portion.
According to a further broad aspect of the pre-sent invention, there is provided a fastener adapted to hold together two portions of mammalian tissue, such as are defined by a wound or incision, to facili-tate healing of the wound or incision. The fasteneris made from an absorbable polymer and comprises a fastening member including at least one leg with a distal end adapted to be passed through and project from the tissue portions. The fastening member also includes a tissue clamp member connected to the leg and adapted to lie substantially against one of the tissue portions. The leg has on its exterior along at least a portion of its length a plurality of sealing members each defining (1) a resilient, annular sealing portion lying generally in a plane substantially normal to the longitudinal axis of the leg, and (2) a surface tapering inwardly from the annular sealing portion towards the distal end of the leg. A receiver is adapted to be disposed against the other of the tissue portions opposite the fastening member. The receiver defines an aperture therein ~ .~
jA,, - 6a - ~ ~3~

for receiving and fastening member leg after the leg has been inserted through the tissue portions. The ! receiver defines an annular retaining ring on the inside surface of the aperture for engaging the annular sealing portion of one of the sealing members of the leg to prevent withdrawal of the leg from the aperture after the leg has been received in the receiver with the sealing portions of adjacent sealing members seal-ingly engaging the surface of the receiver in the aperture, whereby the annular retaining ring is iso-lated from the mammalian tissue by the sealing portions to prevent immediate absorption of the ring.
Numerous other features of various embodiments of a novel tissue fastener will be apparent from the following detailed description and accompanying drawings.
Brief Description of the Drawings In the accompanying drawings forming part of the specification, and in which like numerals are employed to designate liXe parts throughout the same.
Figure 1 is a perspective view of a first embodiment of the fastener of the present invention which includes a fastening member and receiver;
Figure 2 is a cross-sectional view taken gener-ally along the plane 2-2 in Figure l;
Figure 3 is a fragmentary, partial cross-sectional - ~iew of two portions of mammalian tissue defined by an incision or wound with some of the tissue cut away to better show interior detail and illustrating the fastening member of Figure 1 inserted through the two portions of the tissue and fully engaged with the receiver of Figure l; and ~ ::
,~ ' ' ~L2~33~

Figure 4 is a view similar to Figure 3 but showing a p~rtion of the receiver cut away to illustrate the latching mechanism.
escriRtion of the Preferred_Embodlment This invention may be used in many different forms. The specification and accompanying drawings disclose only one specific form as an example of the use of the invention. The precise shapes and sizes of the components herein described are not essential to the invention unless otherwise indicated. The invention is not intended to be limited to the embodiment illustrated, and the scope of the invention will be pointed out in the appended claims~
A preferred embodiment of the fastener is : lS illustrated in Figures 1-4 and is designated generally therein by reference numeral 50. ~he fastener 50 is illustrated in Figures 3 and 4 in the : fully assembled, "set" configuration wherein it is : shown holding together two portions 52 and 54 of mammalian tissue, such as are defined by a wound or incision, to facilita~e healing of the wound or incision. Typi~ally, a plurality of such fasteners 50 would be used to close a wound or incision.
However, with just a small wound or incision, one fastener S0 may be sufficient.
The fastener 50 includes two Qomponents, a generally T-shaped fastening member 60 and a receiver 62, which are initially separated as illustrated in Figure 1 and which are adapted to cooperate to compress or hold between them the tissue porti~ns.
The fa~tening member includes at least one leg 66 which is adapted ~o be passed through and project from the tissue p~rtions. The leg 66 has a distal end 70 which is preferably rounded ~o aid in its passing through the tissue portîons and through .

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, . .

~33~3 the receiver 62 in a manner described in detail hereinafter.
Connected to the other end of ~he leg 66 is a outwardly projecting cross piece or enlarged member, such as clamp member 68. The clamp member 68 and leg 66 are orien~ed relative to each other in a generally perpendicular relationship to define a generally T-shaped configura~ion. The cross member or clamp member 68 may hav~ the shape of a regular parallelpiped (as illustrated) or may have any other suitable shape.
Preferably, the leg 66 has a generally solid, aylindrical shape. The leg 56 has on its exterior along at least a portion of its length a plurality of sealing ~embers 80. Preferably, each sealing member 80 has a frusto~onical shape. Each sealing member 80 defines 1) a resilient, annular sealing portion 82 lying ~enerally in a plane substantially normal to the longitudinal axis vf the 20 leg 66 and 2) a surface 84 ~such as the frustoconical surface illustrated) tapering inwardly from the annular sealinq portion 82 towards the distal end 70 of the leg 66O As can be seen in Figure 1, the surface 84 faces away from the clamp member 68.
As best illus~rated in Figure 3, the receiver 62 is adapted to ~e disposed again~t one of the tissue portions opposite the fa~tening member 60. ~he receiver 6~ def~nes a firs~ side 73 (Figure 1) adapted to be disposed against a ti~sue portion ; 30 (tissure portion 52 shown in Figures 3 and 4). The reoeiver 62 also has a seoond side 75 (Fiyure ~) facing gener~lly away from the first side 73. ~n exterior, peripheral surface 77 extends between the : first and second ~ide~ of the ~eaeiver 62.

~3~

The receiver 62 defines an aperture, such as a general1y cylindrical bore 75 (Figures 1 and 2), extanding from the first side 73 of the receiver to the second side 75 of the receivPr. The bore 76 has a diameter less than the largest diameter vf the annular sealing porti~n 82 of each sealing member 80. However, the diameter of the bore 76 is ~reater than the smallest cross sectional dimension of the portions of the fastening member leg between the annular sealing portions 82. In the embodiment illustrated, the bore 76 has a length or depth sufficient to accommodate (i.e., surround) a length of the fastening member leg having at least four of the sealing members 80.
The receiver 62 also defines an annular retaining or latching ring 90 on the inside surface of the aperture or ~ore 76 for engaging an annular sealing portion 82 of one of the sealing members 80~
This prevents withdrawal of the fastening member leg ~0 66 from the bcre 76 after the leg 6~ has been : received in the re~eiver 62 with the Bealing portions 82 of adjacent sealing members 80 seallngly enyaging ~ the surfa~e of the receiver 62 in the bore 76.
; Preferably, the latching or retaining ring 30 is integrally formed with the receiver 62. ~he ring 90 proj~ct~ inwardly into the bore 76 an amount sufficien~ to prevent movement of a fastening member sealing por~ion 82 paæt the ring 90 when ~he fastening member 60 is pulled relative to the receiver 62 in a direction tending to separate ~he fastening member 60 and receiver 62. ~owever, the retaining ring 90 does no~ project so far ~nwardly that movement of the sealing members B0 past the retaining ring 90 in the other direction is prevented.

~Z~3~

The fastening member 60 and receiver 62 may be formed from suitable materials, such as thermoplastic polymer materials that are absorbable by mammalian tissue. For example, the fastening member and receiver may be molded from absorbable polymers or copolymers of poly-dioxanone, lactide, glycolide and the likeO The fastener may also be molded from a combination of both such materials.
The fastener 50 is used to join the tissue portions 52 and 54 (Figures 2 and 3) in a novel manner. Specifically, the tissue portions 52 and 54 are first approximated in surface-to-surface relationship as best illustrated in Figure 2. Then the fastening member 60 is positioned on one side of the tissue portions with the leg 6Ç oriented a~ an appropriate angle to penetrate the tissue portions.
The receiver 62 is held on the other side of the tissue portions opposite the fastening member 60 with the ~ore 76 generally in ali~nment with the fastening member leg 66.
Next, relative movement between the fastening member 60 and the receiver 62 is effected to urge the fastening member and the re~eiver closer together to cause the fastening member leg 66 to pen~trat~ the tissue portions 52 and 54 and to locate at least a p~rtion of the fastening member leg 66 within the receiver 62. The relatiYe movement between the fastenlng member 60 and the rece~ver 62 is terminated when the clamp member 68 is at a desired distance from the receiver C2 to secure the tissue portions togeth~r. Preferably, this ~ovement is terminated after ~he tissue portions have been compressed together a desired amount.
As the fastenin~ member leg 66 is pushed through receiver 62, the sealing members 80 are ~337~

inwardly deformed as they pass through the smaller diameter bore 76 and as they are moved past the even smaller diameter retaining ring 90. When a member 80 has passed the retaining ring 90, the member 80 expands outwardly into contact with the wall of the bore 760 When the tissue portions 54 and 52 have been compressed the desired amount~ the app3.ied forces effecting the relative movement between the fastening member 60 and the receiver 62 are removed. Then the fastening member 60 and the receiver 62 tend to be forced apart by the compressed tissues. This may effect a small, reverse relative movementO However, this small, reverse movement is limited as will next be explained.
When the relative positions of the fastening member 60 and receiver 62 are as illustrated in Figures 3 and 4, a sealing member 80 immediat~ly adjacent, but below, the receiver retaining ring 90 will limit any reverse relative movement between the fas~ening member 60 and receiver 62. In this orientation, the retaining rinq 90 in the bore 76 of the receiver 62 engages the annular sealing portion 82 of the member 80 and prevents withdrawal of the leg 66 from the receiver 62.
The distal end of the fastenin~ member leg 66 will ~ypically protrude from the receiver 62 opposite ~he side of the rec~iver 62 that i8 contacting one of the tissue portions. If desired, the protruding end of the leg 66 may be severed flush with the ~ttom of the receiver 62 by a suitable : means. Preferably, during the step of ~evering the protruding portion of the fastening member leg 66, the protrudin~ l~rtion of the fas~ening member leg is surrounded with a suitable container for catching ~he :,, ~233~ ~

leg protruding pvrtion after it is severed sc as to prevent the severed portion of th~ leg from falling into the surrounding tissue or body cavity.
Re~ardless of whether the projecting leg portion of ~he fastening member 60 is severed flush with the bottom of the receiver 62, it $s seen that the sealing members 80 within the bore 76 of the receiver 62 sealingly engage the sides of the b~rP 76 and isolate the retaining ring 90. Specifically, with reference to Figure 4, it is seen that the third member 80 from the bottom of the leg 66 is engaged with, and retained by, the retaining ring 90. The adjacent, second member 80 from the bottom of the leg (below the member 80 engaged with the ring 90) is sealingly engaged with the bore 76 in region A.
Simil~rly, the member 80 immediately adjacent and above the member 80 engaged with the ring 90 is also sealingly engaged with the bore 76 at region B.
The sealing enga~ement effected between the sealing m~mbers 80 and the receiver 62 at regions A
and B effectively prevents the ingress of body fluids and tis~ue.. Thus, the relatively small amount of material forming the latching ring 90 and the annular sealing portio~ 82 is not immediately affected by the ~5 body fluids and ~issues and is not immediately : absorbed. ~ence, the novel retaining or latchlng structure is initially undisturbed and remains functional.
. On the other hand, the exterior portions of the f~stening member 60 and of the receiver 62 are in : direct contact with the body fluids and tissues.
Absorption o~ ~hese exterior p~r~ions begins immediatelyO By the time the fas~ener material is absorbed exterior of the s~al regions A and B, the clamped tissues portions 52 and 54 have healed :
.

suffisiently and further clamping is no longer required~ Thus, ingress of the body fluids and tissues to the region of the retaining ring 90 can be permitted, and indeed does occur. Complete absorption o~ the retaining ring 90 and other interior portions of the fastener 50 can then occur.
The above-described method for applying the fa~tener 50 to the tissue portions 52 and 54 may be effected with a suitable instrument specifically designed for holding the fastening member 60 and receiver 62 and for driving the fastening member 60 through the tissue portions and into engagement with the receiver 62. Such an instrument (not illustrateæ) may include a pair of pivotally mounted jaws with one of the jaws adapted for holding the receiver 62 on one side of the tissue portions and with the other of the jaws adapted for holding the fastening member 60 on the other side of the tissue portions. A suitable driving member may be provided as part of the instrument for driving the fastening member Ç0 from its holding jaw, into the tissue : p~rtions, and finally into engagement with the receiver ~2. To facilitate tissue penetration, the fastening member leg distal énd 70 could, if desired, be made more pvinted than is illustrated.
The in trument may include a suitable mechanism for severing the protruding porklon of the fastening m~mber leg 66 after the fastening member 60 and receiver 62 have been locked togetber with the tissue portions under the desired amoun~ of compression. I~ is ~o be realized tha~ such an instrument might be preferably provided with means for applying a plurali~y of such fastaners simultaneously.

7~.~

From the foregoing, it will be observed that numerous variations and modifications may be effected without departing from the true spirt and scope of the novel concept of the invention. It is to be understood that no limitation with respect to the specific article, instrument, and methods illustrated herein is intended or should be inferred7 It is, of course, intended to oover by the appended claims all such modifications as fall within the scope of the claims.

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Claims (6)

The embodiments of the invention in which an exclu-sive property or privilege is claimed are defined as follows:-
1. A fastener adapted to hold together two portions of mammalian tissue, such as are defined by a wound or incision, to facilitate healing of the wound or incision, said fastener being made from an absorbable polymer, said fastener comprising:
a fastening member including at least one leg with a distal end adapted to be passed through and project from said tissue portions, said fastening member also including a tissue clamp member connected to said leg and adapted to lie substantially against one of said tissue portions, said leg having on its exterior along at least a portion of its length a plurality of sealing members each defining (1) a re-silient, annular sealing portion lying generally in a plane substantially normal to the longitudinal axis of said leg and (2) a surface tapering inwardly from said annular sealing portion towards the distal end of said leg; and a receiver adapted to be disposed against the other of said tissue portions opposite said fastening member, said receiver defining an aperture therein for receiving and fastening member leg after said leg has been inserted through said tissue portions, said receiver defining an annular retaining ring on the inside surface of said aperture for engaging said annular sealing portion of one of said sealing members of said leg to prevent withdrawal of said leg from said aperture after said leg has been received in said receiver with the sealing portions of adjacent sealing members sealingly engaging the surface of said receiver in said aperture, whereby said annular retaining ring is isolated from the mammalian tissue by the sealing portions to prevent immediate absorp-tion of said ring.
2. The fastener in accordance with claim 1 in which said fastening member is a generally T-shaped member, in which a portion of said leg has a generally solid cylindrical shape, and in which the distal end of said leg opposite said clamp member has a generally rounded configuration to facilitate placement of said leg through said tissue.
3. The fastener in accordance with claim 1 in which said leg is generally perpendicular to said clamp member.
4. The fastener in accordance with claim 1 in which said fastening member is molded from an absorbable thermoplastic polymer and in which said receiver is molded from an absorbable thermoplastic polymer.
5. The fastener in accordance with claim 1 in which each said receiver has (1) a first side adapted to be disposed against the other of said tissue portions, (2) a second side facing generally away from said first side, and (3) an exterior peripheral surface extending between said first and second sides;
in which said receiver aperture extends from said first side of said receiving member to said second side of said receiver; and in which each said receiver aperture is a bore having a diameter less than the largest diameter of said sealing member annular sealing portion of said fastening member and in which said receiver bore has a depth sufficient to accommodate a length of said fastening member leg having at least four of said sealing members.
6. A fastener adapted to hold together two portions of mammalian tissue, such as are defined by a wound or incision, to facilitate healing of the wound or I

incision, said fastener being made from an absorbable polymer, said fastener comprising:
a generally T-shaped fastening member, said fastening member comprising a leg adapted to be passed through and project from said tissue portions and comprising a tissue clamp member connected to one end of said leg and adapted to lie substantially against one of said tissue portions; said leg having on its exterior along at least a portion of its length a plurality of substantially frustoconical members each defining (1) a resilient, annular sealing portion lying generally in a plane substantially normal to the longitudinal axis of said leg and (2) a frusto-conical surface tapering inwardly from said annular sealing portion and facing away from said clamp member;
and a receiver having a first side adapted to be disposed against the other of said tissue portions and a second side facing generally away from said first side; said receiver having an exterior peripheral surface extending between said first and second sides;
said receiver defining a bore extending from said first side of said receiver to said second side of said receiver for receiving said fastening member leg after said leg has been inserted through said tissue portions, said receiver defining an annular retaining ring on the inside surface of said bore for engaging said annular sealing portion of one of said frustoconical members of said leg to prevent withdrawal of said leg from said bore after said leg has been received in said receiver with the sealing portions of adjacent frustonical members sealingly engaging the surface of said receiver in said bore, whereby said annular retaining ring is isolated from the mammalian tissue by the sealing portions to prevent immediate absorption of said ring.
CA000456772A 1983-06-20 1984-06-18 Two-piece tissue fastener with ratchet leg staple and sealable latching receiver Expired CA1233719A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US506,086 1983-06-20
US06/506,086 US4532926A (en) 1983-06-20 1983-06-20 Two-piece tissue fastener with ratchet leg staple and sealable latching receiver

Publications (1)

Publication Number Publication Date
CA1233719A true CA1233719A (en) 1988-03-08

Family

ID=24013118

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000456772A Expired CA1233719A (en) 1983-06-20 1984-06-18 Two-piece tissue fastener with ratchet leg staple and sealable latching receiver

Country Status (5)

Country Link
US (1) US4532926A (en)
JP (1) JPS6012049A (en)
CA (1) CA1233719A (en)
DE (1) DE3422721A1 (en)
GB (1) GB2141630B (en)

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US6656182B1 (en) 1982-05-20 2003-12-02 John O. Hayhurst Tissue manipulation
US4712550A (en) * 1985-04-08 1987-12-15 Sinnett Kevin B Retinal tack
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GB2141630B (en) 1986-08-28
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DE3422721A1 (en) 1984-12-20
US4532926A (en) 1985-08-06

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