Source: http://www.google.com/patents/US20030178465
Timestamp: 2017-07-21 07:18:48
Document Index: 105226527

Matched Legal Cases: ['art 7', 'art 7', 'art 7', 'art 7', 'art 24', 'art 7', 'art 24', 'art 24', 'art 7', 'art 7', 'art 7', 'art 7', 'art 7', 'art 7']

Patent US20030178465 - Surgical stapling instrument - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA surgical stapling instrument comprises a frame having a body portion and a handle. A staple fastening assembly is provided in the distal region of the instrument and includes a cartridge device, which comprises at least one closed row (10, 12) of staples, and an anvil. The anvil is movable relative...http://www.google.com/patents/US20030178465?utm_source=gb-gplus-sharePatent US20030178465 - Surgical stapling instrumentAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS20030178465 A1Publication typeApplicationApplication numberUS 10/287,067Publication dateSep 25, 2003Filing dateNov 4, 2002Priority dateNov 28, 2001Also published asCA2413140A1, CA2413140C, DE10158246C1, EP1316290A2, EP1316290A3, EP1316290B1, US6978922, USRE39841Publication number10287067, 287067, US 2003/0178465 A1, US 2003/178465 A1, US 20030178465 A1, US 20030178465A1, US 2003178465 A1, US 2003178465A1, US-A1-20030178465, US-A1-2003178465, US2003/0178465A1, US2003/178465A1, US20030178465 A1, US20030178465A1, US2003178465 A1, US2003178465A1InventorsFederico Bilotti, Mark Neurohr, Laszlo CsikyOriginal AssigneeFederico Bilotti, Mark Neurohr, Laszlo CsikyExport CitationBiBTeX, EndNote, RefManPatent Citations (15), Referenced by (90), Classifications (8), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetSurgical stapling instrument
[0023] In the following, the invention is described in more detail by means of an embodiment. The drawings show in [0024] [0024]FIG. 1 a side view of the staple fastening assembly of an embodiment of the surgical stapling instrument according to the invention, [0025] [0025]FIG. 2 an isometric view onto an end part which forms the distal surface of the cartridge device of the staple fastening assembly of FIG. 1, [0026] [0026]FIG. 3 an isometric view of the distal portion of the staple driving device of the embodiment, [0027] [0027]FIG. 4 an isometric view onto the staple-forming surface of the anvil of the embodiment of the stapling instrument, [0028] [0028]FIG. 5 an isometric view onto the staple-forming surface of the anvil of another embodiment of the stapling instrument. [0029] [0029]FIG. 1 is a side view of the staple fastening assembly 1 which forms the distal portion of a surgical stapling instrument. The staple fastening assembly 1 includes a cartridge device 2 (which comprises, in the embodiment, two closed rows of staples) and an anvil 4. The anvil 4 is mounted at the distal end of a shaft 5 and can be moved relative to the cartridge device 2, i.e. along the longitudinal axis of the staple fastening assembly 1, in order to adjust the size of the gap between the anvil 4 and the cartridge device 2. [0030] The cartridge device 2 comprises a housing 6 which contains the staples, a circular knife, as well as components of a moving device (adapted to move the anvil 4 relative to the cartridge device 2), a staple driving device (adapted to drive the staples out of the cartridge device 2 towards the anvil 4), and a knife actuating device (adapted to move the knife towards the anvil 4). The end face of the cartridge device 2, i.e. the surface from which the staples exiting from the cartridge device 2 are expelled towards the anvil 4, is formed in an end part 7 inserted into the circumferential wall of the housing 6. [0031] The staple fastening assembly 1 can be removably mounted on a shaft of the stapling instrument by means of a coupling 8 provided at the proximal end region of the cartridge device 2. The terms “proximal” and “distal” relate to the view of the person operating the stapling instrument. [0032] Generally, the overall design and the mechanical components, drive mechanisms and safety features of the surgical stapling instrument are as in a conventional circular stapling instrument; the three-dimensional shape of the staple lines and some details of the staple driving device, however, are different, as explained in the following. [0033] [0033]FIG. 2 shows the end part 7 in an isometric view. The distal surface of the end part 7 comprises slots from which the staples are expelled towards the anvil 4 when the stapling instrument is “fired”. These slots are arranged in two closed rows, thus defining a first closed row 10 of staples (the outer one in FIG. 2) and a second closed row 12 of staples (the inner one in FIG. 2). [0034] Three of these exit slots of the first closed row 10 are designated by the reference numerals 14, 15, and 16. As shown in FIG. 2, the exit slots 14, 15, and 16 and all the other exit slots of the first closed row 10 lie in the same plane, i.e. a plane perpendicular to the longitudinal axis of the staple fastening assembly 1. Between the exit slots 14 and 15, there is a gap or recess 18, whereas a protrusion 19 emerges from the area between the exit slots 15 and 16. This pattern is repeated along the circumference of the first closed row 10. In this way, the line along which the first closed row 10 of staples is arranged, i.e. the line around the first closed row 10 following the surface topography of the end part 7 and descending into the recess 18 and ascending around the protrusion 19, has a stepped shape. It is this line which defines, in the area of the first closed row 10, the tissue contact between the cartridge device 2 and the anvil 4 when the stapling instrument is operated. [0035] In a similar manner, the line along which the second closed row 12 of staples is arranged has a stepped shape as well. In this case, however, the exit slots of the staples are located in two different planes, each perpendicular to the longitudinal axis of the staple fastening assembly 1. As shown in FIG. 2, exit slots 20 and 22 are in the same plane which is more distal than the plane of the exit slots of the first closed row 10. Exit slot 21, which is arranged between the exit slots 20 and 22, is located in the other plane and is more proximal than the exit slots of the first closed row 10. This pattern is repeated along the circumference of the second closed row 12. In the embodiment, the peaks of the protrusions 19 are in the plane of the exit slots 20 and 22, whereas the grounds of the recesses 18 are in the plane of exit slot 21. Exit slot 21 and the corresponding exit slots of the second closed row 12 are radially aligned with the recesses 18. As shown in FIG. 2, the staples of the first closed row 10 and the staples of the second closed row 12 are staggered with respect to each other. [0036] In FIG. 2, a staple guide part 24 is located below the distal surface of the end part 7. The staple guide part 24 comprises guide slots 26 for guiding the staples of the first closed row 10 and guide slots 28 for guiding the staples of the second closed row 12. Each of theses guide slots 26, 28 accommodates one staple, the pointed ends of the staple facing the corresponding exit slot. The staple guide part 24 as well as the end part 7 are preferably made of a medical grade resin by injection moulding and may be manufactured as one component. [0037] The circular knife, which is not shown in the figures, is guided at the inner periphery of the end part 7. It is moved in distal direction when the stapling instrument is actuated, as usual with conventional circular staplers. In the embodiment, the cutting edge of the knife has a stepped shape which essentially follows the stepped shape of the line along which the second closed row 12 of staples is arranged. [0038] [0038]FIG. 3 shows the distal portion 30 of the staple driving device of the stapling instrument. In the embodiment, this portion is designed as an integrally moulded sleeve structure. It includes an actuator shaft 32 distally ending at a base 34 which is reinforced by means of ribs 35. The proximal end of the actuator shaft 32 is coupled to an actuating rod inside the shaft of the stapling instrument when the staple fastening assembly 1 is mounted to the distal end of this shaft. When the instrument is “fired”, i.e. when an actuating trigger located at the handle of the instrument is operated, the actuating rod is moved in distal direction, thus pushing the sleeve structure 30 in distal direction as well. [0039] For each staple, the staple driving device 30 comprises a pusher protruding in distal direction and parallel to the longitudinal axis of the staple fastening assembly 1. These pushers are arranged in two rows, i.e. the outer pushers 36 for the first closed row 10 of staples and the inner pushers 38 and 39 for the second closed row 12 of staples. In the assembled state of the staple fastening assembly 1, the pushers 36 are guided in the guide slots 26, whereas the pushers 38 and 39 are guided in the guide slots 28. As shown in FIG. 3, all of the pushers 36 have the same length, but the pushers 39 are shorter than the pushers 38. The end side of each pusher 36, 38 and 39 abuts at the crown of a staple such that the staples are expelled from the exit slots of the first closed row 10 and the second closed row 12 when the instrument is fired. [0040] The shorter pushers 39 are assigned to exit slot 21 and the corresponding exit slots of the second closed row 12, whereas the longer pushers 38 are assigned to the exit slots 20, 22 and the other exit slots in the more distal plane for the second closed row 12. The length of the pushers 36 is between that of the pushers 38 and 39, corresponding to the location of the exit slots of the first closed row 10. This design results in an almost simultaneous exit of all staples from their exit slots when the instrument is fired. [0041] [0041]FIG. 4 is an isometric view onto the proximal surface of the anvil 4, which includes a peripheral rim 40 and an end plate 42. The proximal end side of the rim 40 is designed as a staple-forming surface 43. For each staple, the staple-forming surface 43 comprises a pair of staple-forming grooves which form or bend the pointed ends of the staple when these ends are pushed against the staple-forming surface 43 upon firing the instrument. [0042] The relief of the staple-forming surface 43 is essentially a negative of the relief of the end surface of end part 7. Thus, in the mounted state of the anvil 4, the grooves 44, 45, and 46 match to the exit slots 14, 15, and 16 of the first closed row 10, and a protrusion 48 between the grooves 44 and 45 fits into the recess 18, whereas a recess 49 accommodates the protrusion 19 when the anvil 4 is close to the cartridge device 2. Similarly, the locations of grooves 50, 51, and 52 match to the positions of the exit slots 20, 21, and 22 of the second closed row 12. [0043] Generally, the stapling instrument is operated like a conventional circular stapler. By moving the anvil 4 towards the cartridge device 2, the tissue ends to be stapled are clamped between the end surface of end part 7 and the staple-forming surface 43 of the anvil 4. The tissue follows the stepped shapes of the lines along which the first closed row 10 and the second closed row 12 of staples are arranged and is forced by protrusions like the protrusion 48 or the staple-forming surface 51 on the anvil 4 into corresponding recesses like the recess 18 or the area of the exit slot 21, and vice versa. The width of the recesses like recess 49 or recess 18 is somewhat larger than the width of the corresponding protrusions like protrusion 19 or protrusion 48, such that the tissue is not squeezed in the protrusion/recess pairs. [0044] When the instrument is fired, the staples of the first closed row 10 and the second closed row 12 are expelled almost simultaneously from the end surface of the end part 7, penetrate the tissue parts and are formed at the staple-forming surface 43 of the anvil 4. Immediately afterwards, the cutting edge of the circular knife, which is mounted on the staple driving device 30 inside the pushers 38 and 39 of the second closed row 12, cuts the tissue. [0045] After firing, the distance between the anvil 4 and the cartridge device 2 is somewhat increased in order to release the anastomosis seam. Because of the stepped structures of the end surface of the end part 7 and the staple-forming surface 43 of the anvil 4, the staple lines of the anastomosis seam have a greater length than comparable staple lines resulting from corresponding smooth surfaces in a conventional circular stapler of the same outer diameter. Consequently, retraction of the instrument is easier. [0046] [0046]FIG. 5 is an isometric view onto the proximal surface of the anvil 4′ of a second embodiment of the surgical stapling instrument. The anvil 4′ is the counterpart of a cartridge device having two closed raws of staples, in which the designs of the outer closed raw of staples and of the inner closed raw of staples are reversed with respect to the cartridge device 2 of the first embodiment. To facilitate comparison with FIG. 4, in FIG. 5 the same reference numerals are used as in FIG. 4, but they are primed. [0047] The relief of the staple-forming surface 43′ is essentially a negative of the relief of the end surface of the cartridge device of the second embodiment. In a corresponding staple driving device, the lengths of the pushers are adjusted to the locations of the staples in the cartridge device of the second embodiment. The cartridge device and the staple driving device of the second embodiment are not shown in the figures because the details are evident from a comparison with the first embodiment. 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ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BILOTTI, FEDERICO;NEUROHR, MARK;CSIKY, LASZLO;REEL/FRAME:013787/0475;SIGNING DATES FROM 20021015 TO 20021029Sep 19, 2006RFReissue application filedEffective date: 20060807Oct 3, 2006RFReissue application filedEffective date: 20060807RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services