US20150119932A1 - Endocutter with auto-feed buttress - Google Patents

Endocutter with auto-feed buttress Download PDF

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Publication number
US20150119932A1
US20150119932A1 US14/589,113 US201514589113A US2015119932A1 US 20150119932 A1 US20150119932 A1 US 20150119932A1 US 201514589113 A US201514589113 A US 201514589113A US 2015119932 A1 US2015119932 A1 US 2015119932A1
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US
United States
Prior art keywords
buttress
staples
target tissue
staple holder
effector
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.)
Abandoned
Application number
US14/589,113
Inventor
Bryan D. Knodel
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.)
Aesdex LLC
Dextera Surgical Inc
Original Assignee
Cardica 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 Cardica Inc filed Critical Cardica Inc
Priority to US14/589,113 priority Critical patent/US20150119932A1/en
Publication of US20150119932A1 publication Critical patent/US20150119932A1/en
Assigned to AESDEX, LLC reassignment AESDEX, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DEXTERA SURGICAL INC.
Assigned to AESCULAP AG reassignment AESCULAP AG ASSET PURCHASE AGREEMENT Assignors: AESDEX, LLC
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/10—Surgical instruments, devices or methods, e.g. tourniquets for applying or removing wound clamps, e.g. containing only one clamp or staple; Wound clamp magazines
    • A61B17/105—Wound clamp magazines
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07292—Reinforcements for staple line, e.g. pledgets

Definitions

  • the endocutter 2 may then be reset for firing again, as described in the Multi-Fire Application.
  • the lower portion of the cable or cables 12 may be tensioned and/or moved proximally toward the handle, thereby dragging the upper portion of the cable or cables 12 distally.
  • the upper portion moves distally, it carries the next segment of buttress 8 along with it.
  • That segment of buttress 8 moves into position on the upper surface of the staple holder 4 , covering some or all of the openings 6 as described above.
  • the endocutter 2 may then be actuated again, substantially as described above.

Abstract

Surgical apparatus may include a staple holder and a buttress positioned on the upper surface of the staple holder, where the staple holder is configured to fire multiple sets of staples, and where the buttress is advanceable between firings such that the staple holder is configured to deploy multiple sets of staples through the buttress. A surgical method of treating tissue within the body of a patient may include providing an endocutter having a staple holder and having a plurality of staples, where a plurality of but less than all of the staples are arranged in a firing position within the staple holder; engaging tissue of the patient with the staple holder; deploying the plurality of staples in firing position through a buttress and into tissue of the patient; disengaging the end effector from tissue of the patient; moving a plurality of staples into firing position; engaging tissue of the patient with the staple holder; advancing a segment of buttress relative to the staple holder; and repeating the deploying.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This patent application is a continuation application of U.S. patent application Ser. No. 13/645,416, Attorney Docket No. 354-2, filed on Oct. 4, 2012, which is a divisional application of U.S. patent application Ser. No. 12/381,316, Attorney Docket No. 258, filed on Mar. 9, 2009, now U.S. Pat. No. 8,317,071, issued Nov. 27, 2012. The contents of the aforementioned applications are incorporated herein by reference in their entireties for all purposes.
    • FIELD OF THE INVENTION
  • The invention generally relates to a surgical tool and method, and more specifically to an endocutter utilizing buttress material.
    • BACKGROUND
  • An endocutter is a surgical tool that staples and cuts tissue to transect that tissue while leaving the cut ends hemostatic. An endocutter is small enough in diameter for use in minimally invasive surgery, where access to a surgical site is obtained through a trocar, port, or small incision in the body. A linear cutter is a larger version of an endocutter, and is used to transect portions of the gastrointestinal tract. A typical endocutter receives at its distal end a disposable single-use cartridge with several rows of staples, and includes an anvil opposed to the cartridge. The surgeon inserts the endocutter through a trocar or other port or incision in the body, orients the end of the endocutter around the tissue to be transected, and compresses the anvil and cartridge together to clamp the tissue. Then, a row or rows of staples are deployed on either side of the transection line, and a blade is advanced along the transection line to divide the tissue.
  • An endocutter, or other surgical stapler, is sometimes utilized to treat tissue that is friable, diseased, or otherwise in a weakened condition. A buttress is known to be used in conjunction with a surgical stapler in order to distribute the force exerted by contact between the staple back and tissue across a greater amount of tissue, thereby decreasing the load on fragile tissue. However, no buttress delivery system is known for a true multi-fire surgical instrument that is capable of firing multiple groups of staples into tissue without the need to exchange cartridges or remove the staple holder from the patient.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of the staple holder of an endocutter configured to automatically feed a segment of buttress material.
  • FIG. 2 is a cutaway view of the distal end of the staple holder of FIG. 1.
    •
  • The use of the same reference symbols in different figures indicates similar or identical items.
    • DETAILED DESCRIPTION
  • Referring to FIGS. 1-2, an endocutter 2 may include a staple holder 4. In the interest of clarity and brevity, with the exception of the description provided herein, one exemplary staple holder 4 may be configured substantially as set forth in FIG. 34 and the accompanying text of U.S. patent application Ser. No. 12/263,171, filed Oct. 31, 2008 (the “Multi-Fire Application”), which is hereby incorporated by reference in its entirety. A plurality of openings 6 are shown in phantom in FIG. 1 on the upper surface of the staple holder 4, through which staples are deployed. A slidable buttress 8 is positioned on the upper surface of the staple holder 4. The buttress 8 may be substantially as wide as the staple holder 4, or may be narrower or wider if desired. The buttress 8 may be substantially flat, and the edges of the buttress 8 may curve downward slightly to conform to the shape of the upper surface of the staple holder 4. Alternately, the buttress 8 may be shaped to conform to a different shape of the upper surface of the staple holder 4. Alternately, the buttress 8 need not conform to the shape of the upper surface of the staple holder 4, in whole or in part.
  • The buttress 8 may be perforated substantially along its longitudinal centerline, or about a different line. The perforations 10 may be rectangular, round, oval or shaped in any other suitable manner. The buttress 8 is perforated in a manner that allows easy separation of the buttress into two separate pieces after actuation of the endocutter, as described in greater detail below. The buttress 8 may be fabricated from any suitable material, such as (but not limited to) VICRYL®, produced by Ethicon, Inc. of Somerville N.J.; DEXON®, produced by Sherwood-Davis and Geck of St. Louis, Mo.; TEFLON®, produced by E. I. DuPont de Nemours & Co. of Wilmington, Del.; GORE-TEX®, produced by W.L. Gore of Flagstaff, Ariz.; animal material such as tanned bovine pericardium; biocompatable elastomers such as ε-caprolactone glycolide; or polymers, whether resorbable or not.
  • The buttress 8 may be connected to at least one cable 12. Advantageously, two cables 12 are provided, one attached to the buttress 8 at or near each lateral edge thereof. Further, the buttress 8 may be attached to each cable 12 substantially along the entire length of the buttress 8, such that as each portion of the buttress 8 is deployed in tissue, the remaining portion of the buttress 8 is still attached to each cable 12. Alternately, the buttress 8 may be attached to the cable 12 only at certain discrete points along the buttress 8. Each cable 12 is partially wound around a pulley 14, which may be the same pulley as described in the Multi-Fire Application about which a feeder belt is rotated. Alternately, the pulley 14 may be a different pulley 14 that shares the same axle as the pulley about which a feeder belt is rotated. Like a feeder belt, the cable 8 is partially wound about the pulley 14, such that a portion of the cable 12 is located closer to the upper surface of the staple holder 4 than the remaining portion of the cable 12. The cable 12 may extend into the handle of the endocutter 2, such that the handle is configured to pull the lower segment of the cable 12 proximally into the handle. The handle also may be configured to tension the upper segment of the cable 12. The handle may be substantially as described in the Multi-Fire Application, and may be configured to pull the lower segment of the cable 12 proximally into the handle in the same manner and/or with the same components used to retract the lower portion of a feeder belt proximally toward the handle. Alternately, the handle may be configured to tension and/or retract the cable 12 proximally in any other suitable manner.
  • The buttress 8 may be long enough to be utilized with all of the groups of staples to be fired. Where the staples are configured to be fired along a particular length of staple line, such as defined by a row of openings 6, the buttress 8 may be substantially as long as that staple line length multiplied by the number of firings of which the endocutter 2 is capable. Alternately, the buttress 8 may be shorter, such as where the endocutter 2 is customized for a particular surgical procedure in which a particular number of actuations is known to be used, and in which the buttress 8 is only needed in conjunction with a subset of actuations, and those actuations occur at the beginning of the surgical procedure.
  • The proximal end of the buttress 8 may extend along the lumen of a shaft connected to the staple holder, and may extend as far as the handle of the endocutter 2. If so, the proximal end of the buttress 8 may be stored in any suitable manner, such as by winding about a spool, or by folding within a housing. The proximal end of the buttress 8 may be tensioned, but need not be tensioned at all times, or at all.
  • In use, the staple holder 4 is placed in proximity to tissue to be treated, such as described in the Multi-Fire Application. The tissue may be clamped, and the endocutter 2 is then actuated to fire a plurality of staples. As the free end of each staple moves upward through the corresponding opening 6 in the staple holder 4, that free end penetrates into and then completely through the buttress 8. Each free end of each staple then penetrates into tissue and against the anvil, such as against a corresponding staple forming pocket defined in the surface of the anvil. As that free end bends, it may once again penetrate the buttress 8, this time from the other side, either into or completely through the buttress 8.
  • During staple deployment, or after, a knife may slide along the slot 16, cutting tissue adjacent to the staple holder 4, as set forth in the Multi-Fire Application. The knife may cut the buttress 8 along the perforations 10, thereby separating the buttress 8 into two separate strips. Alternately, the knife cuts through tissue but does not cut through the buttress 8, and the perforations 10 are sized such that tension between the two newly-cut pieces of tissue pulls the buttress 8 apart along the line of perforations 10. The two strips of buttress 8 act to interconnect the staples along a staple line, as well as distribute the force exerted by those staples against tissue across a larger surface area, reducing the loading on that tissue. The buttress 8 may also include transverse perforations 18 that allow the particular strip of buttress 8 to more easily disengage from the segment of buttress 8 connected to the proximal end of that strip. Thus, the buttress 8 may be transversely perforated at longitudinally-spaced intervals. In this way, a distal portion of the buttress 8 is separated from a remainder of the buttress 8 after the staples have been deployed into tissue and the buttress is secured in place in tissue.
  • The endocutter 2 may then be reset for firing again, as described in the Multi-Fire Application. During that reset process, the lower portion of the cable or cables 12 may be tensioned and/or moved proximally toward the handle, thereby dragging the upper portion of the cable or cables 12 distally. As that upper portion moves distally, it carries the next segment of buttress 8 along with it. That segment of buttress 8 moves into position on the upper surface of the staple holder 4, covering some or all of the openings 6 as described above. The endocutter 2 may then be actuated again, substantially as described above.
  • While the invention has been described in detail, it will be apparent to one skilled in the art that various changes and modifications can be made and equivalents employed, without departing from the present invention. It is to be understood that the invention is not limited to the details of construction, the arrangements of components, and/or the method set forth in the above description or illustrated in the drawings. Statements in the abstract of this document, and any summary statements in this document, are merely exemplary; they are not, and cannot be interpreted as, limiting the scope of the claims. Further, the figures are merely exemplary and not limiting. Topical headings and subheadings are for the convenience of the reader only. They should not and cannot be construed to have any substantive significance, meaning or interpretation, and should not and cannot be deemed to indicate that all of the information relating to any particular topic is to be found under or limited to any particular heading or subheading. Therefore, the invention is not to be restricted or limited except in accordance with the following claims and their legal equivalents.

Claims (14)

What is claimed is:
1. A surgical method for treating tissue at a surgical site of a patient, comprising:
placing an end-effector of an endocutter into the surgical site of the patient, the end-effector includes a staple holder, a buttress over the staple holder, and a plurality of staples in the staple holder;
finding a target tissue to be treated;
engaging the target tissue by the end-effector;
deploying the plurality of staples into said target tissue through said buttress, wherein the buttress provides support to said target tissue as said plurality of staples are deployed into said target tissue; and
separating said buttress from said staple holder after deployment of said plurality of staples.
2. The method of claim 1, wherein the separated buttress remains with the stapled target tissue.
3. The method of claim 1, wherein said buttress includes openings to allow deployment of said plurality of staples through said buttress.
4. The method of claim 1, further comprising:
disengaging said end-effector from said target tissue after deploying said plurality of staples;
finding a next target tissue to be treated;
advancing a next portion of the buttress over the staple holder;
advancing a next plurality of staples into a firing position within the staple holder;
engaging said next target tissue by said end-effector; and
deploying said next plurality of staples into said next target tissue through said next portion of the buttress for continuous firing or deploying of staples for treatment of the next target tissue.
5. The method of claim 4, wherein the next portion of the buttress provides support to said next target tissue as said next plurality of staples are deployed into said next target tissue.
6. The method of claim 4, wherein repeated deploying of staples from said staple holder selectively being done without removing said end-effector from said surgical site.
7. The method of claim 1, further comprising cutting said buttress while deploying said plurality of staples.
8. The method of claim 1, further comprising cutting said buttress and said target tissue while deploying said plurality of staples.
9. A surgical method for treating tissue at a surgical site of a patient, comprising:
placing an end-effector of an endocutter into the surgical site of the patient, the end-effector includes a staple holder, a buttress over a surface of said staple holder, and a plurality of staples in said staple holder;
finding a target tissue to be treated;
engaging the target tissue to be treated by said end-effector; and
deploying the plurality of staples into said target tissue through said buttress, wherein the buttress provides support to said target tissue as said plurality of staples are deployed into said target tissue.
10. The method of claim 9, further comprising:
separating said buttress from said surface of said staple holder after deployment of said plurality of staples.
11. A surgical method for treating tissue at a surgical site of a patient, comprising:
placing an end-effector of an endocutter into the surgical site of the patient, the end-effector includes a staple holder, a movable strip of buttress over a surface of the staple holder, and a plurality of staples in the staple holder;
finding a target tissue to be treated;
engaging the target tissue by said end-effector; and
deploying the plurality of staples into said target tissue through a portion of said movable strip of buttress, wherein the portion of said movable strip of buttress provides support to said target tissue as said plurality of staples are deployed into said target tissue.
12. The method of claim 11, further comprising:
separating said portion of said movable strip of buttress from said surface of said staple holder after deployment of said plurality of staples.
13. The method of claim 12, further comprising:
disengaging said end-effector from said target tissue after deploying said plurality of staples;
finding a next target tissue to be treated;
advancing a next portion of the movable buttress over the staple holder;
advancing a next plurality of staples into a firing position within the staple holder;
engaging said next target tissue by said end-effector; and
deploying said next plurality of staples into said next target tissue through said next portion of the movable buttress for continuous firing or deploying of staples for treatment of the next target tissue.
14. The method of claim 13, further comprising:
separating said next portion of said movable strip of buttress from said surface of said staple holder after deployment of said next plurality of staples.
US14/589,113 2009-03-09 2015-01-05 Endocutter with auto-feed buttress Abandoned US20150119932A1 (en)

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US12/381,316 US8317071B1 (en) 2009-03-09 2009-03-09 Endocutter with auto-feed buttress
US13/645,416 US8926658B1 (en) 2009-03-09 2012-10-04 Endocutter with auto-feed buttress
US14/589,113 US20150119932A1 (en) 2009-03-09 2015-01-05 Endocutter with auto-feed buttress

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