US20120091183A1 - Method of Fabricating a Stiff Anvil for a Surgical Instrument - Google Patents
Method of Fabricating a Stiff Anvil for a Surgical Instrument Download PDFInfo
- Publication number
- US20120091183A1 US20120091183A1 US13/335,581 US201113335581A US2012091183A1 US 20120091183 A1 US20120091183 A1 US 20120091183A1 US 201113335581 A US201113335581 A US 201113335581A US 2012091183 A1 US2012091183 A1 US 2012091183A1
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- US
- United States
- Prior art keywords
- insert
- anvil
- fabricating
- strength
- fabricated
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
Images
Classifications
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- 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
- A61B17/07207—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 the staples being applied sequentially
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00526—Methods of manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00964—Material properties composite
-
- 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
- A61B2017/07214—Stapler heads
- A61B2017/07257—Stapler heads characterised by its anvil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
Definitions
- the invention generally relates to surgical staplers and stapling.
- a surgical stapler 2 typically includes a staple holder 4 and an anvil 6 .
- the staple holder 4 and anvil 6 are configured to close together and clamp tissue therebetween. After clamping, the staple holder 4 deploys a plurality of staples into that tissue.
- a challenge faced by most surgical staplers 2 is beam deflection.
- the surgical stapler 2 clamps tissue that is sufficiently thick and/or tough, the distal end of the anvil 6 may not close completely relative to the staple holder 4 . Instead, the distal end of the anvil 6 may bend away from the staple holder 4 , because more force is required to compress the tissue than to cause the distal end of the anvil 6 to bend. Many attempts have been made to solve this problem.
- Some surgical staplers 2 utilize an “I-beam” mechanism, where the upper and lower portions of the I-beam each slide in a corresponding channel in the staple holder 4 and anvil 6 .
- the I-beam takes up space in the surgical stapler 2 , limits cutting and stapling operations to being performed by motion in the distal direction, and adds to the part count.
- Other surgical staplers 2 have been proposed that utilize exotic, highly-stiff materials to reduce or eliminate beam deflection.
- Stiffness is the force required to produce a unit deflection of a structure, and is related to the elastic modulus of the material from which the structure is fabricated.
- Strength is the ability of a structure to resist loads.
- stiff, high-modulus materials are not high-strength materials, with the result that such materials are not practical for fabrication of an anvil 6 .
- FIG. 1 is a side view of a surgical stapler.
- FIG. 2 is a cross-section side view of an exemplary anvil.
- FIG. 3 is a cross-section end view of the anvil of FIG. 2 .
- FIG. 4 is a cross-section end view of another exemplary anvil.
- FIG. 5 is a cross-section end view of another exemplary anvil.
- the Endocutter Document describes a surgical stapler 2 having a staple holder 4 and an anvil 6 .
- the anvil 6 described in this document may be used in place of the anvil 6 described in the Endocutter Document, or in place of a convention anvil in any suitable surgical stapler 2 .
- an insert 8 is held within the body 10 of the anvil 6 . That is, the body 10 is the part of the anvil 6 that receives the insert 8 .
- the insert 8 may have any cross-sectional shape, such as circular, oval, rectangular, square, or any other suitable shape.
- the cross-sectional shape of the insert 8 may be constant, or may vary, along the length of that insert 8 .
- the insert 8 may extend along part, or all, of the body 10 of the anvil 6 . If the insert 8 extends along only part of the body 10 of the anvil 6 , the insert 8 may be located at any suitable longitudinal position within the body 10 of the anvil 6 .
- the insert 8 is stiffer than the body 10 , and the body 10 is stronger than the insert 8 .
- the insert 8 may be any high-modulus material, such as, for example, tungsten carbide.
- the insert 8 may be a different ceramic, metal, or any other suitable high-modulus material.
- the body 10 may be any high-strength material, such as, for example, 17-4 PH stainless steel.
- the body 10 may be ceramic, a different metal, or any other suitable high-strength material. Numerical analysis indicates that the use of a tungsten carbide insert 8 in conjunction with a 17-4 PH stainless steel body 10 results in an anvil 6 approximately three times stiffer than an anvil 6 composed of 17-4 PH stainless steel alone.
- the insert 8 may be a high-strength material
- the body 10 may be a high-modulus material.
- “high-modulus” of the insert 8 or body 10 refers to a material having a higher modulus than the material from which the other is fabricated.
- “high-strength” of the insert 8 or body 10 refers to a material having a higher strength than the material from which the other is fabricated.
- the insert 8 and body 10 may be fabricated in any suitable manner.
- the insert 8 and the body 10 may be fabricated separately, and then the insert 8 may be placed into a corresponding cavity 12 within the body 10 .
- the insert 8 may be held in place by a pressure or interference fit, by adhesive, by welding, by pinning, or by any other method, mechanism and/or structure.
- the body 10 may be insert-molded about the insert 8 , or vice versa. Metal injection molding may be used to fabricate the body 10 about the insert 8 , or to fabricate the insert 8 within the cavity 12 defined in the body 10 .
- the body 10 may be cast about the insert 8 .
- the insert 8 may be cast in place within the cavity 12 .
- a different exemplary anvil 6 may include two or more inserts 8 a , 8 b held within the cavity in the body 10 .
- the inserts 8 a , 8 b may have any suitable cross-sectional shape.
- each insert 8 a , 8 b may have a generally rectangular cross-sectional shape, where the rectangle is wider than it is tall.
- the inserts 8 a , 8 b may have substantially the same cross-sectional area and shape as one another, or may be shaped and/or sized differently from one another.
- one of the inserts 8 a , 8 b may be thicker than the other.
- the inserts 8 a , 8 b each may extend substantially the same length longitudinally, and/or may be located in substantially the same longitudinal position in the anvil 6 . Alternately, at least one insert 8 a , 8 b may be shorter than another, and/or may be located in a different longitudinal position in the anvil 6 .
- One insert 8 a may be fabricated from a high-strength material, and another insert 8 b may be fabricated from a high-modulus material; such inserts 8 a , 8 b may be stacked relative to each other in any suitable order.
- the body 10 may be fabricated from plastic or other material, where the anvil 6 relies on the inserts 8 a , 8 b for both strength or stiffness, or may be fabricated from any other material, where the anvil 6 does not rely entirely on the inserts 8 a , 8 b to provide both strength and stiffness.
- each insert 8 a , 8 b may be fabricated from a high-strength material and the body 10 may be fabricated from a high-modulus material, or vice versa.
- an upper insert 8 a may be fabricated from a material that is stronger in compression than in tension
- a lower insert 8 b may be fabricated from a material that is stronger in tension than compression.
- the upper insert 8 a is further from the staple holder 4 than the lower insert 8 b .
- the use of terms such as “upper”, “lower” and “upwards” merely refers to the orientation of figures on the page for clarity and brevity, and does not limit the arrangement of the staple holder 4 and anvil 6 , nor the orientation of the anvil 6 in use.
- the tendency of the distal end of the anvil 6 to bend upward away from the staple holder 4 is resisted both by the tensile strength of the lower insert 8 b and the ability of the upper insert 8 a to withstand compression.
- high modulus materials are stronger in compression than in tension, so in such a configuration the upper insert 8 a may be fabricated from a high-modulus material and the lower insert 8 b may be fabricated from a high-strength material.
- a different exemplary anvil 6 may be fabricated from two separate, stacked layers 14 a , 14 b .
- an insert 8 may not be utilized.
- an insert 8 may be provided in conjunction with the two layers 14 a , 14 b if desired; in such a configuration, the layers 14 a , 14 b may form the body 10 of the anvil 6 , and the insert 8 is received into the cavity 12 of the body 10 .
- the layers 14 a , 14 b may be fabricated from different materials and stacked in any order.
- an upper layer 14 a may be fabricated from a high modulus material such as tungsten carbide, and a lower layer 14 b may be fabricated from a high-strength material such as 17-4 PH stainless steel.
- the upper layer 14 a may be fabricated from a high-strength material and the lower layer 14 b may be fabricated from a high modulus material.
- the layers 14 a , 14 b may be fixed to one another to form a rigid anvil 6 , and such fixation may be accomplished in any suitable manner, such as by adhesive, by welding, by pinning, by insert molding, or by metal injection molding.
- one layer 14 may include one or more apertures (not shown) defined therein, and the other layer 14 may include one or more projections (not shown) configured to be received in those apertures.
- the layers 14 a , 14 b each may extend along the entire length and width of the anvil 6 . Alternately, at least one layer 14 may extend along less than the entire length and/or width of the anvil 6 . If so, the other layer 14 may extend upward or downward to fill the remaining space. Alternately, one layer 14 may be composed of two or more separate pieces, each extending along less than all of the entire length and/or width of the anvil 6 .
- the layers 14 a , 14 b may each be substantially the same height. Alternately, one layer 14 may be thicker than the other, depending on the desired stiffness and/or strength of the anvil 6 as a whole. As another example, the anvil 6 may be fabricated from three or more layers 14 .
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
- This application is a divisional of U.S. patent application Ser. No. 12/489,355, filed on Jun. 22, 2009, which is hereby incorporated by reference in its entirety.
- The invention generally relates to surgical staplers and stapling.
- Referring to
FIG. 1 , asurgical stapler 2 typically includes astaple holder 4 and ananvil 6. Thestaple holder 4 andanvil 6 are configured to close together and clamp tissue therebetween. After clamping, thestaple holder 4 deploys a plurality of staples into that tissue. A challenge faced by mostsurgical staplers 2 is beam deflection. When thesurgical stapler 2 clamps tissue that is sufficiently thick and/or tough, the distal end of theanvil 6 may not close completely relative to thestaple holder 4. Instead, the distal end of theanvil 6 may bend away from thestaple holder 4, because more force is required to compress the tissue than to cause the distal end of theanvil 6 to bend. Many attempts have been made to solve this problem. Somesurgical staplers 2 utilize an “I-beam” mechanism, where the upper and lower portions of the I-beam each slide in a corresponding channel in thestaple holder 4 andanvil 6. However, the I-beam takes up space in thesurgical stapler 2, limits cutting and stapling operations to being performed by motion in the distal direction, and adds to the part count. Othersurgical staplers 2 have been proposed that utilize exotic, highly-stiff materials to reduce or eliminate beam deflection. Stiffness is the force required to produce a unit deflection of a structure, and is related to the elastic modulus of the material from which the structure is fabricated. Strength is the ability of a structure to resist loads. However, it is a truism of material science that stiff, high-modulus materials are not high-strength materials, with the result that such materials are not practical for fabrication of ananvil 6. -
FIG. 1 is a side view of a surgical stapler. -
FIG. 2 is a cross-section side view of an exemplary anvil. -
FIG. 3 is a cross-section end view of the anvil ofFIG. 2 . -
FIG. 4 is a cross-section end view of another exemplary anvil. -
FIG. 5 is a cross-section end view of another exemplary anvil. - The use of the same reference symbols in different figures indicates similar or identical items.
- U.S. Patent Application Publication No. 2009/0065552, published on Mar. 12, 2009 (the “Endocutter Document”), is hereby incorporated by reference herein in its entirety. The Endocutter Document describes a
surgical stapler 2 having astaple holder 4 and ananvil 6. Theanvil 6 described in this document may be used in place of theanvil 6 described in the Endocutter Document, or in place of a convention anvil in any suitablesurgical stapler 2. - Referring to
FIGS. 2-3 , aninsert 8 is held within thebody 10 of theanvil 6. That is, thebody 10 is the part of theanvil 6 that receives theinsert 8. Theinsert 8 may have any cross-sectional shape, such as circular, oval, rectangular, square, or any other suitable shape. The cross-sectional shape of theinsert 8 may be constant, or may vary, along the length of thatinsert 8. Theinsert 8 may extend along part, or all, of thebody 10 of theanvil 6. If theinsert 8 extends along only part of thebody 10 of theanvil 6, theinsert 8 may be located at any suitable longitudinal position within thebody 10 of theanvil 6. Advantageously, theinsert 8 is stiffer than thebody 10, and thebody 10 is stronger than theinsert 8. Theinsert 8 may be any high-modulus material, such as, for example, tungsten carbide. However, theinsert 8 may be a different ceramic, metal, or any other suitable high-modulus material. Thebody 10 may be any high-strength material, such as, for example, 17-4 PH stainless steel. However, thebody 10 may be ceramic, a different metal, or any other suitable high-strength material. Numerical analysis indicates that the use of atungsten carbide insert 8 in conjunction with a 17-4 PHstainless steel body 10 results in ananvil 6 approximately three times stiffer than ananvil 6 composed of 17-4 PH stainless steel alone. The combination of a high-modulus insert 8 and a high-strength body 10 results in ananvil 6 that is stronger than theinsert 8 alone could be, and stiffer than thebody 10 alone could be. Alternately, theinsert 8 may be a high-strength material, and thebody 10 may be a high-modulus material. For the purposes of this document, “high-modulus” of theinsert 8 orbody 10 refers to a material having a higher modulus than the material from which the other is fabricated. Similarly, “high-strength” of theinsert 8 orbody 10 refers to a material having a higher strength than the material from which the other is fabricated. - The
insert 8 andbody 10 may be fabricated in any suitable manner. As one example, theinsert 8 and thebody 10 may be fabricated separately, and then theinsert 8 may be placed into acorresponding cavity 12 within thebody 10. Theinsert 8 may be held in place by a pressure or interference fit, by adhesive, by welding, by pinning, or by any other method, mechanism and/or structure. As another example, thebody 10 may be insert-molded about theinsert 8, or vice versa. Metal injection molding may be used to fabricate thebody 10 about theinsert 8, or to fabricate theinsert 8 within thecavity 12 defined in thebody 10. As another example, thebody 10 may be cast about theinsert 8. As another example, theinsert 8 may be cast in place within thecavity 12. - Referring also to
FIG. 4 , a differentexemplary anvil 6 may include two ormore inserts body 10. Theinserts insert inserts inserts inserts anvil 6. Alternately, at least oneinsert anvil 6. Oneinsert 8 a may be fabricated from a high-strength material, and anotherinsert 8 b may be fabricated from a high-modulus material;such inserts body 10 may be fabricated from plastic or other material, where theanvil 6 relies on theinserts anvil 6 does not rely entirely on theinserts insert body 10 may be fabricated from a high-modulus material, or vice versa. - Optionally, an
upper insert 8 a may be fabricated from a material that is stronger in compression than in tension, and alower insert 8 b may be fabricated from a material that is stronger in tension than compression. Theupper insert 8 a is further from thestaple holder 4 than thelower insert 8 b. The use of terms such as “upper”, “lower” and “upwards” merely refers to the orientation of figures on the page for clarity and brevity, and does not limit the arrangement of thestaple holder 4 andanvil 6, nor the orientation of theanvil 6 in use. In this way, as theanvil 6 andstaple holder 4, the tendency of the distal end of theanvil 6 to bend upward away from thestaple holder 4 is resisted both by the tensile strength of thelower insert 8 b and the ability of theupper insert 8 a to withstand compression. Typically, high modulus materials are stronger in compression than in tension, so in such a configuration theupper insert 8 a may be fabricated from a high-modulus material and thelower insert 8 b may be fabricated from a high-strength material. - Referring to
FIG. 5 , a differentexemplary anvil 6 may be fabricated from two separate,stacked layers insert 8 may not be utilized. However, aninsert 8 may be provided in conjunction with the twolayers layers body 10 of theanvil 6, and theinsert 8 is received into thecavity 12 of thebody 10. Thelayers upper layer 14 a may be fabricated from a high modulus material such as tungsten carbide, and alower layer 14 b may be fabricated from a high-strength material such as 17-4 PH stainless steel. As another example, theupper layer 14 a may be fabricated from a high-strength material and thelower layer 14 b may be fabricated from a high modulus material. Thelayers rigid anvil 6, and such fixation may be accomplished in any suitable manner, such as by adhesive, by welding, by pinning, by insert molding, or by metal injection molding. Optionally, one layer 14 may include one or more apertures (not shown) defined therein, and the other layer 14 may include one or more projections (not shown) configured to be received in those apertures. Such a configuration may facilitate the connection of the layers 14 to one another. Thelayers anvil 6. Alternately, at least one layer 14 may extend along less than the entire length and/or width of theanvil 6. If so, the other layer 14 may extend upward or downward to fill the remaining space. Alternately, one layer 14 may be composed of two or more separate pieces, each extending along less than all of the entire length and/or width of theanvil 6. In this way, the material properties of a particular layer 14 may be fine-tuned. Thelayers anvil 6 as a whole. As another example, theanvil 6 may be fabricated from three or more layers 14. - 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 (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/335,581 US20120091183A1 (en) | 2009-06-22 | 2011-12-22 | Method of Fabricating a Stiff Anvil for a Surgical Instrument |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/489,355 US8087562B1 (en) | 2009-06-22 | 2009-06-22 | Anvil for surgical instrument |
US13/335,581 US20120091183A1 (en) | 2009-06-22 | 2011-12-22 | Method of Fabricating a Stiff Anvil for a Surgical Instrument |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/489,355 Division US8087562B1 (en) | 2009-06-22 | 2009-06-22 | Anvil for surgical instrument |
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Publication Number | Publication Date |
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US20120091183A1 true US20120091183A1 (en) | 2012-04-19 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US12/489,355 Active 2029-09-22 US8087562B1 (en) | 2009-06-22 | 2009-06-22 | Anvil for surgical instrument |
US13/335,581 Abandoned US20120091183A1 (en) | 2009-06-22 | 2011-12-22 | Method of Fabricating a Stiff Anvil for a Surgical Instrument |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US12/489,355 Active 2029-09-22 US8087562B1 (en) | 2009-06-22 | 2009-06-22 | Anvil for surgical instrument |
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US (2) | US8087562B1 (en) |
Cited By (152)
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US8939343B2 (en) | 1997-09-23 | 2015-01-27 | Covidien Lp | Surgical stapling apparatus including a drive beam |
US9289211B2 (en) | 2013-03-13 | 2016-03-22 | Covidien Lp | Surgical stapling apparatus |
US9445811B2 (en) | 2008-09-23 | 2016-09-20 | Covidien Lp | Knife bar for surgical instrument |
US9498216B2 (en) | 2011-12-01 | 2016-11-22 | Covidien Lp | Surgical instrument with actuator spring arm |
US9629628B2 (en) | 2013-03-13 | 2017-04-25 | Covidien Lp | Surgical stapling apparatus |
US9655617B2 (en) | 2007-08-31 | 2017-05-23 | Covidien Lp | Surgical instrument |
US9662108B2 (en) | 2013-08-30 | 2017-05-30 | Covidien Lp | Surgical stapling apparatus |
US9668733B2 (en) | 2014-04-21 | 2017-06-06 | Covidien Lp | Stapling device with features to prevent inadvertent firing of staples |
US9717498B2 (en) | 2013-03-13 | 2017-08-01 | Covidien Lp | Surgical stapling apparatus |
US9724093B2 (en) | 2008-09-23 | 2017-08-08 | Covidien Lp | Surgical instrument and loading unit for use therewith |
US9757126B2 (en) | 2014-03-31 | 2017-09-12 | Covidien Lp | Surgical stapling apparatus with firing lockout mechanism |
US9814463B2 (en) | 2013-03-13 | 2017-11-14 | Covidien Lp | Surgical stapling apparatus |
US9820737B2 (en) | 2006-10-06 | 2017-11-21 | Covidien Lp | Surgical instrument including a locking assembly |
US9848874B2 (en) | 2014-02-14 | 2017-12-26 | Covidien Lp | Small diameter endoscopic stapler |
US9861366B2 (en) | 2014-05-06 | 2018-01-09 | Covidien Lp | Ejecting assembly for a surgical stapler |
US9867613B2 (en) | 2013-12-19 | 2018-01-16 | Covidien Lp | Surgical staples and end effectors for deploying the same |
US9918717B2 (en) | 2015-03-18 | 2018-03-20 | Covidien Lp | Pivot mechanism for surgical device |
US9987012B2 (en) | 2015-07-21 | 2018-06-05 | Covidien Lp | Small diameter cartridge design for a surgical stapling instrument |
US10039545B2 (en) | 2015-02-23 | 2018-08-07 | Covidien Lp | Double fire stapling |
US10039532B2 (en) | 2015-05-06 | 2018-08-07 | Covidien Lp | Surgical instrument with articulation assembly |
US10045782B2 (en) | 2015-07-30 | 2018-08-14 | Covidien Lp | Surgical stapling loading unit with stroke counter and lockout |
US10064622B2 (en) | 2015-07-29 | 2018-09-04 | Covidien Lp | Surgical stapling loading unit with stroke counter and lockout |
USD829903S1 (en) | 2015-02-26 | 2018-10-02 | Covidien Lp | Shipping wedge |
US10085749B2 (en) | 2015-02-26 | 2018-10-02 | Covidien Lp | Surgical apparatus with conductor strain relief |
US10111660B2 (en) | 2015-12-03 | 2018-10-30 | Covidien Lp | Surgical stapler flexible distal tip |
US10117650B2 (en) | 2015-05-05 | 2018-11-06 | Covidien Lp | Adapter assembly and loading units for surgical stapling devices |
US10172615B2 (en) | 2015-05-27 | 2019-01-08 | Covidien Lp | Multi-fire push rod stapling device |
US10213204B2 (en) | 2015-10-02 | 2019-02-26 | Covidien Lp | Micro surgical instrument and loading unit for use therewith |
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