Source: http://www.google.com/patents/US4917114?dq=5,410,344
Timestamp: 2014-07-25 21:19:03
Document Index: 596976367

Matched Legal Cases: ['art.\n8', 'art 62', 'art 62', 'art 58', 'art 62', 'art 62', 'art 62', 'art 58', 'arts 58', 'arts 58', 'art 62', 'art 62']

Patent US4917114 - Surgical fastener and surgical stapling apparatus - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsThe two-part surgical fastener is composed of an annular stapling part having projecting prongs and annular retaining board having an annular gap which receives the prongs. Barbs on the prongs serve to abutt against a retaining ring on the retaining part to maintain a fixed relationship between the parts...http://www.google.com/patents/US4917114?utm_source=gb-gplus-sharePatent US4917114 - Surgical fastener and surgical stapling apparatusAdvanced Patent SearchPublication numberUS4917114 APublication typeGrantApplication numberUS 07/176,695Publication dateApr 17, 1990Filing dateApr 1, 1988Priority dateOct 17, 1986Fee statusPaidPublication number07176695, 176695, US 4917114 A, US 4917114A, US-A-4917114, US4917114 A, US4917114AInventorsDavid T. Green, Herbert W. KorthoffOriginal AssigneeUnited States Surgical CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (17), Referenced by (125), Classifications (9), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetSurgical fastener and surgical stapling apparatusUS 4917114 AAbstract The two-part surgical fastener is composed of an annular stapling part having projecting prongs and annular retaining board having an annular gap which receives the prongs. Barbs on the prongs serve to abutt against a retaining ring on the retaining part to maintain a fixed relationship between the parts for stapling purposes. The anvil assembly on which the retaining part of the fastener is mounted as fingers which can be collapsed radially inwardly after stapling to permit ease of removal.
What is claimed is: 1. A surgical fastener comprisingan annular stapling part having a plurality of axially extending circumferentially spaced prongs, each said prong having a sharp tip for piercing tissue; an annular retaining part having an annular gap for receiving said prongs, said gap being of an axial length less than an axial length of said prongs to permit passage of said prongs therethrough; and catching means for holding said prongs in said retaining part to clamp the pierced tissue therebetween. 2. A surgical fastener as set forth in claim 1 wherein said catch means includes a radially extending barb on at least some of said prongs for abutting against said retaining part.
8. A surgical fastener as set forth in claim 1 wherein each of said parts is made of a tissue absorbable polymer.
9. A surgical fastener comprisingan annular stapling part having a plurality of axially extending circumferentially spaced prongs, each said prong having a sharp tip for piercing tissue; an annular retaining part including an inner cylindrical guide wall and a concentrically disposed outer retaining ring defining an annular gap for receiving said prongs; and catch means for holding said prongs in said retaining part between said guide wall and said retaining ring. 10. A surgical fastener as set forth in claim 9 wherein said catch means includes a radially extending barb on at least some of said prongs for abutting against said retaining ring.
11. A surgical fastener as set forth in claim 10 wherein at least one of said guide wall and ring is radially resiliently deformable to permit passage of said barbs therebetween.
12. A surgical fastener as set forth in claim 9 wherein each of said parts is made of a tissue absorbable polymer.
This is a division of application Ser. No. 920,581 filed Oct. 17, 1986, now U.S. Pat. No. 4,752,024.
Heretofore, various types of surgical stapling devices have been known wherein a stapling function takes place at a location which is relatively remote for the location at which the stapling device is held and actuated by an operator. For example linear closure surgical stapler devices are described in U.S. Pat. No. 3,494,533 and circular anastomosis surgical stapler devices are described in U.S. Pat. Nos. 4,304,236; 4,351,466; 4,473,077 and 4,488,523 as well as U.S. Pat. Nos. D. 273,041 and 271,944. Typically, the stapling devices described in these patents operate by placing tissue to be stapled in a clamped manner between an anvil assembly and a fastener holding assembly, both of which are located at the distal end of the instrument The clamped tissue is stapled by driving one or more fasteners from the holding assembly so that the ends of the fasteners pass through the tissue and are formed properly by contact with the anvil assembly. The forces required to operate the instrument are applied by the operator of the instrument to one or more actuator elements located at or near the proximal end of the instrument. The distal and proximal portions of the instrument are joined by a longitudinal connecting shaft structure along which the actuating forces and motions are transmitted to the distal operation elements. This type of construction, including relatively widely spaced distal and proximal portions, may be employed for any of several reasons, such as the relative inaccessibility of the tissue to be stapled, the need for good visibility of the tissue during stapling, and the like.
Briefly, the invention provides a surgical fastener which is comprised of an annular stapling part having a plurality of axially extending circumferentially spaced prongs each of which has a sharp tip for piercing tissue. In addition, the fastener has an annular retaining part with an annular gap for receiving the prongs of the stapling part. In addition, catch means are provided for holding the prongs in the retaining part in order to clamp pierced tissue therebetween. For example, the catch means may include a radially extending barb on at least one of the prongs for abutting against the retaining part
The invention also provides a method of stapling the tubular ends of a pair of vessels together which includes the steps of clamping the tubular ends of the vessels between an anvil assembly and a surgical fastener holding assembly, driving an annular stapling part through the clamped ends of the tissue into an annular retaining part removably supported on the anvil assembly and severing the clamped ends on a circular cutting line disposed radially within the stapling part.
FIG. 1 illustrates a perspective view of a surgical stapling apparatus constructed in accordance with the invention in place within an intestine:
The stapling apparatus 1 includes a shaft 14 and a hand screw 16 which is articulated to the shaft 14 in order to move the shaft 14. As indicated in FIG. 4, the apparatus 1 includes an anvil assembly 17 which is mounted on a distal end of the shaft 14 and includes an anvil 18 which faces a surgical fastener holding assembly 20 which is also mounted on the shaft 14 for relative movement with the anvil assembly 17 to maintain the two ends of the intestine areas 22, 24 therebetween (see FIG. 1).
Referring to FIG. 4, the shaft 14 is provided with a screwthread 30 at the proximal end which mates in an internally threaded sleeve extension 32 of the hand screw 16. The sleeve extension 32 is secured to the hand screw 16 so that both turn together and thus the rotation of the hand screw 16 causes longitudinal movement of the shaft 14. By tightening the hand screw 16, the anvil assembly 17 can be moved towards the holding assembly 20 so that the tissue can be clamped therebetween with proper spacing between the anvil assembly 17 and the holding assembly 20. Calibration means (not shown) may be provided to ensure proper spacing, for example as described in U.S. Pat. No. 4,473,077.
Referring to FIGS. 6 and 12, the actuator means includes an actuator 50 which is abutted against the distal end of the tube 48 and is disposed within the holding assembly 20. In this respect, the holding assembly is provided with a pad 51 (FIG. 12) which frictionally retains the actuator 50 in place until the actuator 50 is driven clear of the pad 51 by the tube 48. The actuator 50 carries an annular push ring 54 as well as an annular blade or scalpel 52 which is retained between the actuator 50 and push ring 54. In addition, a plastic spacer ring 56 is concentrically disposed between the push ring 54 and the annular scalpel 52. As indicated in FIG. 6, the push ring 54 is provided with a plurality of circumferentially disposed slots at the distal end.
An annular retaining part 62 is also mounted at the free ends of the fingers 80 of the anvil 18. As indicated, the retaining part 62 includes an inner cylindrical guide wall 64 and an outer retaining ring 66 which are concentrically disposed relative to each other to define an annular gap for receiving the prongs 60. To this end, the gap is of an axial length less than an axial length of the prongs 60 to permit passage of the prongs 60 therethrough. Suitable means in the form of posts 68 (FIG. 8) are provided to secure the retaining ring 66 to the cylindrical wall 64. An annular flange 67 is also provided between the post 68 and the guide wall 64 (FIG. 7).
Referring to FIGS. 9 and 10, wherein like reference characters indicate like parts as above, each prong 60 of the stapling part 58 has a sharp tip for piercing tissue while the retaining part 62 is positioned to receive the prongs 60. Catch means are also provided for holding the prongs 60 in the retaining part 62 in order to clamp the pierced tissue therebetween. As illustrated, the catch means includes a radially extending barb 69 on each prong 60 with a proximally facing surface 70 which can be engaged against the retaining ring 66 of the retaining part 62. As indicated, each barb 69 extends radially outwardly of a prong 60 so that the proximally facing surface 70 can be engaged against the retaining ring 66 and particularly on a side remote from the stapling part 58.
When the two parts 58, 62 are brought together, the prongs 60 pierce the tissue and then enter into the gap between the guide walls 64 and retaining ring 66. At this time, the guide wall 64 and ring 66 temporarily deform due to the wedging action of the barbs 69. After the barbs 69 clear the retaining ring 66, the ring 66 and wall 64 snap back into their normal relationship in which the surfaces 70 of the barbs 69 engage against the retaining ring 66 thus securing the parts 58, 62 together while also clamping the two ends of tissue together. Of note, the flange 67 protects uninvolved tissue from the sharp ends of the prongs 60 (see FIG. 13).
Referring to FIGS. 6 and 12, the anvil assembly 17 also includes an anvil head 81 having an internal conical wall (83 as as shown in FIGS. 11 and 14) which receives the anvil with the fingers 80 abutting against the wall. In addition, the anvil head 81 has a central shaft 86 about which the hub 82 is mounted via an axial opening 84. The shaft 86 also has an external screw thread 88 on which a hub retainer 92 is thus via internal screw threads 94. The hub retainer 92 is thus able to freewheel in relation to the anvil head 81, that is, the hub retainer 92 can be threaded into abuttment with the hub 82 with a greater or lesser degree of force. In this way, the anvil head 81 and retainer 92 cooperate to form a means for biasing the fingers 80 of the anvil 18 radially inwardly of the cutting block 76 to permit movement of the fingers 80 radially inwardly in response to removal of the cutting block 76 from the fingers 80. As indicated in FIG. 12, cutting block 76 holds the fingers 80 in a tensioned state. In addition, the fingers 80 are suitably shaped so as to hold the retaining part 62 in a snap fit relation (see FIG. 12). When the cutting block 76 and retaining part 62 are in place, dimensional stability is imparted to the resilient finqers 80.
The invention thus provides a surgical fastener of two-part construction which can be readily manipulated and oriented in place for stapling of body tissue in an anastomosis procedure. Because the fastener parts are annular with the prongs of one part fitting into an annular groove of the other part, precise registration of the prongs relative to the annular gap is not required.
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ClassificationA61B17/115Cooperative ClassificationA61B17/1155, A61B17/115European ClassificationA61B17/115Legal EventsDateCodeEventDescriptionOct 16, 2001FPAYFee paymentYear of fee payment: 12Sep 30, 1997FPAYFee paymentYear of fee payment: 8Oct 1, 1993FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google