US20140339287A1 - Pin alignment assembly for surgical stapler - Google Patents
Pin alignment assembly for surgical stapler Download PDFInfo
- Publication number
- US20140339287A1 US20140339287A1 US14/446,940 US201414446940A US2014339287A1 US 20140339287 A1 US20140339287 A1 US 20140339287A1 US 201414446940 A US201414446940 A US 201414446940A US 2014339287 A1 US2014339287 A1 US 2014339287A1
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- United States
- Prior art keywords
- alignment pin
- surgical stapler
- contact area
- opening
- end cap
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- Abandoned
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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
-
- 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
-
- 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
-
- 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
- A61B2017/07264—Stapler heads characterised by its anvil characterised by its staple forming cavities, e.g. geometry or material
Definitions
- the present disclosure relates generally to a surgical stapling apparatus and, more specifically, to a surgical stapling apparatus having a pin alignment assembly including lead-in and/or catch features.
- Surgical stapling instruments used for applying parallel rows of staples through compressed living tissue are well known in the art, and are commonly used, for example, for closure of tissue or organs prior to trans-section, prior to resection, or in anastomoses, and for occlusion of organs in thoracic and abdominal procedures.
- such surgical stapling instruments include an anvil assembly, a cartridge assembly for supporting an array of surgical staples, an approximation mechanism for approximating the anvil and cartridge assemblies, an alignment pin assembly for capturing tissue between the cartridge and anvil assemblies and for maintaining alignment between the cartridge and anvil assemblies during approximation and firing, and a firing mechanism for ejecting the surgical staples from the cartridge assembly.
- the approximation mechanism and the firing mechanism can include distinct actuators for effecting approximation and firing of the staples.
- An alignment pin assembly advances an alignment pin from the cartridge assembly into engagement with the anvil.
- the alignment pin assembly can be automatically actuated upon operation of the approximation mechanism and/or manually operated.
- the distal end of the alignment pin is received within an opening formed in the anvil assembly.
- the opening formed in the anvil assembly is typically sized slightly larger in diameter than the diameter of the alignment pin being received therein. This configuration prevents lateral movement of the alignment pin prior to and during firing of the surgical staples.
- an alignment pin assembly including an alignment pin configured to be advanced prior to actuation of a stapler and an end cap defining an opening configured to receive the alignment pin prior to actuation of the stapler.
- the end cap includes an alignment pin contact area formed about the opening configured to direct the alignment pin into the opening.
- the alignment pin contact area may define a substantially V-shaped or U-shaped profile. In some embodiments, the contact area can have curved surfaces.
- the alignment pin contact area may define in one embodiment an angle of about one-hundred fifty degrees to about one-hundred seventy degrees, and preferably in one embodiment an angle of about one-hundred sixty degrees.
- the end cap may be configured for reception on a distal end of an anvil assembly. Alternatively, the end cap may be integrally formed with an anvil assembly.
- the end cap may include a boss feature on a distal side of the opening for frictionally engaging the alignment pin.
- the boss feature can include at least a first and second boss member.
- Each of the boss members may include an alignment pin engagement surface.
- a surgical stapler including a handle assembly, an elongated body extending from the handle assembly, a cartridge assembly mounted on the distal end of the elongated body and including an alignment pin configured for advancement from the cartridge assembly, and an anvil assembly positioned distal of the cartridge assembly.
- the anvil assembly includes an opening configured to receive the alignment pin, the opening including an angled alignment pin contacting area to provide a lead in configuration.
- the alignment pin contact area defines a substantially V-shaped profile, while in another embodiment the alignment pin contact area defines a substantially U-shaped profile.
- the alignment pin contact area can define curved surfaces.
- the alignment pin contact area may define an angle of about one-hundred fifty degrees to about one-hundred seventy degrees, and preferably in one embodiment may define an angle of about one-hundred sixty degrees.
- the end cap may include a boss feature for frictionally engaging the alignment pin.
- the boss feature may include at least a first and second boss member. Each of the boss members may include an alignment pin engagement surface.
- the surgical stapler can have in some embodiments a tolerance equal to approximately half the width of the contact area, thereby enabling the alignment pin to be directed within the opening if a lateral misalignment from the opening is less than or equal to a distance measuring up to approximately half the width of the contact area.
- FIG. 1 is a perspective view of a prior art surgical stapling device
- FIG. 2 is an enlarged perspective view of the distal end of the prior art surgical stapling device of FIG. 1 ;
- FIG. 3 is an enlarged perspective view of a portion of the anvil assembly of the prior art surgical stapling device of FIG. 1 ;
- FIG. 4 is a cross-sectional schematic view of the anvil assembly and alignment pin of the prior art surgical stapling device of FIG. 1 ;
- FIG. 5 is an enlarged perspective view of the distal end of the surgical stapling device of FIG. 1 including an end cap according to an embodiment of the present disclosure
- FIG. 6 is an enlarged perspective view of detail 6 of FIG. 5 ;
- FIG. 7 is a cross-sectional end view taken along line 7 - 7 of FIG. 6
- FIG. 8 is an enlarged end view of detail 6 of FIG. 5 with the alignment pin in the retracted position and not shown;
- FIG. 9 is a cross-sectional view of the end cap and alignment pin of FIG. 5 prior to engagement of the alignment pin with the end cap;
- FIG. 10 is a cross-sectional view of the end cap and alignment pin of FIG. 5 upon engagement of the alignment pin with the end cap;
- FIG. 11 is an enlarged end view of a distal end of an anvil assembly including an alternative embodiment of an end cap according to the present disclosure
- FIG. 12 is an enlarged side view of the distal end of the anvil assembly of FIG. 11 ;
- FIG. 13 is an enlarged perspective view of the end cap of FIG. 11 .
- proximal will refer to the portion of the instrument closer to the operator and the term “distal” will refer to the portion of the instrument further from the operator.
- FIGS. 1-3 A prior art surgical stapling device 10 is shown in FIGS. 1-3 .
- stapling device 10 includes a stationary handle 14 , a pivotable trigger 16 , an elongated central body portion 18 , a cartridge assembly 20 and an anvil assembly 22 .
- Thumb buttons 24 are slidably positioned on each side of body 12 and are movable to manually advance an alignment pin 38 distally from cartridge assembly 20 . (The pin 38 can alternately be automatically advanced upon actuation of trigger 16 .)
- a release button 26 is positioned on the proximal portion of body 12 and is depressible to allow cartridge assembly 20 to return from an approximated position disposed adjacent to anvil assembly 22 to a position spaced from anvil assembly 22 .
- anvil assembly 22 includes an anvil 36 .
- Anvil 36 includes an opening 67 configured to receive alignment pin 38 therethrough during operation of stapling device 10 .
- Anvil assembly 22 further includes a cap 39 .
- Cap 39 provides anvil assembly 22 with a smooth surface which is less likely to snag tissue during use.
- opening 67 formed in anvil 36 includes a diameter slightly larger than the diameter of alignment pin 38 .
- Alignment pin 38 may include a tapered or rounded distal free end 38 a.
- the size and configuration of alignment pin 38 and opening 67 provides surgical stapling device 10 with a tolerance equal to approximately half of the width of alignment pin 38 , or a distance “x”. In this manner, alignment pin 38 may be laterally misaligned a distance of “x” before distal end 38 a of alignment pin 38 will not be received within opening 67 .
- “x” is equal to about 0.039 inches.
- surgical stapler 10 has been described to the extent necessary to disclose the aspects of the present disclosure. A more detailed discussion of the structure and function of a surgical stapler that is substantially similar to surgical stapler 10 is disclosed in commonly owned U.S. Pat. No. 6,817,508 (the '508 patent), the entire contents of which are incorporated by reference herein. Although described with reference to surgical stapling device 10 , the aspects of present disclosure may be modified for use with other stapling devices having an advanceable alignment pin.
- End cap 51 may be composed of plastic, polymer or any other suitable material. End cap 51 defines a substantially D-shaped member configured to be received over an end of anvil assembly 22 . End cap 51 may be frictionally secured to anvil assembly 22 or may instead be secured thereto using adhesives, mechanical fasteners or the like. It could also have a snap in feature or interlocking structure to engage an upper or side surface of the anvil assembly and optionally glued for additional holding. In some embodiments, end cap 51 is integrally (monolithically) formed with anvil assembly 22 .
- end cap 51 is configured to be received on a pre-existing stapler; however, it is also envisioned that surgical staplers may be modified to incorporate the end cap. It is envisioned that the aspects of the present disclosure may be modified for use with any instrument including an alignment pin. As shown, end cap 51 is positioned above (in the orientation of FIG. 6 ) the rows of staple forming anvil depressions.
- end cap 51 defines an opening 53 configured to align with an opening formed in anvil 36 of stapler 10 when end cap 51 is securely received on anvil assembly 22 .
- End cap 51 defines an alignment pin contact area 55 about opening 53 which provides a lead in feature.
- Alignment pin contact area 55 is configured to direct alignment pin 38 towards opening 53 .
- the width of alignment pin contact area 55 is limited only by the width of end cap 51 .
- Alignment pin contact area 55 in the illustrated embodiment includes a substantially V-shaped profile defining an angle ⁇ , ranging in one embodiment by way of example from about one-hundred fifty degrees (150°) to about one-hundred seventy degrees (170°), and preferably, in one embodiment, about one-hundred sixty degrees (160°).
- alignment pin contact area 55 includes a substantially U-shaped profile.
- An upper portion 55 a of alignment pin contact area 55 also includes a curved or angled profile.
- Upper portion 55 a of alignment pin contact area 55 is configured to further direct distal end 38 a of alignment pin 38 towards opening 53 in end cap 51 .
- alignment pin contact area 55 includes a coating, e.g., silicone, configured to reduce the friction between distal end 38 a of alignment pin 38 and end cap 51 to facilitate sliding of alignment pin 38 against alignment pin contact area 55 .
- End cap 51 includes a boss feature 57 configured for frictionally engaging and retaining alignment pin 38 upon receipt of distal end 38 a of alignment pin 38 through opening 53 .
- Boss feature 57 is configured to prevent premature retraction of alignment pin 38 during the actuation of stapler 10 by the interference fit provided by the ridges 59 a, 59 b.
- Boss feature 57 includes first and second boss members 57 a, 57 b extending inwardly about opening 53 . Although shown including two boss members 57 a, 57 b, it is envisioned that end cap 51 may include one or more than two boss members.
- First and second boss members 57 a, 57 b each include a pin engagement surface 59 a, 59 b, respectively, configured to engage alignment pin 38 as distal end 38 a of alignment pin 38 is received through opening 53 .
- Pin engagement surfaces 59 a, 59 b may include a ridge, as shown, or may be otherwise configured to frictionally engage distal end 38 a of alignment pin 38 .
- Pin engagement surfaces 59 a, 59 b may include a coating, i.e., rubber (not shown), for more securely engaging alignment pin 38 .
- alignment end cap 51 The operation of alignment end cap 51 will be described with particular reference to FIGS. 9 and 10 .
- alignment pin 38 may be advanced manually using thumb buttons such as button 24 of FIG. 1 .
- alignment pin 38 is automatically advanced during actuation of the device such as surgical stapling device 10 of FIG. 1 .
- Advancement of alignment pin 38 in the direction indicated by arrow “A”, directs the distal end 38 a of alignment pin 38 toward opening 53 of end cap 51 .
- alignment pin 38 if alignment pin 38 is out of alignment with opening 53 of cap 51 , it will contact pin contact area 55 .
- alignment pin 38 and end cap 51 provides surgical stapling device 10 with a tolerance equal to approximately half of the width of alignment pin contact area 55 , or a distance “y”. In this manner, alignment pin 38 may be laterally misaligned from opening 53 a distance of “y” before distal end 38 a of alignment pin 38 will not be directed within opening 53 . In one embodiment, “y” is equal to about 0.157 inches.
- end cap 151 an alternate embodiment of an end cap according to the present disclosure is shown generally as end cap 151 .
- End cap 151 is substantially similar to end cap 51 , described hereinabove, and will therefore only be described as relates to the differences therebetween.
- End cap 151 is configured for secure engagement with an anvil assembly 122 .
- End cap 151 has a spherical alignment pin contact area 155 with the curved surfaces directing the alignment pin 38 of FIGS. 8-9 toward opening 153 .
- End cap 151 may be frictionally received on anvil assembly 122 or may instead be mechanically fastened, adhered, welded or otherwise secured thereto.
- End cap can alternatively be monolithically (integrally) formed with the anvil assembly.
- alignment pin contact area 155 directs an alignment pin (not shown) into opening 153 formed therein if the alignment pin is misaligned and contacts the contact area 155 in a similar manner as contact area 55 .
- End cap 151 may include a boss feature (not shown) as in the embodiment of FIG. 7 .
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Abstract
An alignment pin assembly for a surgical stapler includes an alignment pin configured to be advanced prior to actuation of a stapler and an end cap defining an opening configured to receive the alignment pin prior to actuation of the stapler. The end cap includes an alignment pin contact area formed about the opening configured to direct the alignment pin into the opening.
Description
- This application claims priority from provisional application Ser. No. 61/317,394, filed Mar. 25, 2010, the entire contents of which are incorporated herein by reference.
- 1. Technical Field
- The present disclosure relates generally to a surgical stapling apparatus and, more specifically, to a surgical stapling apparatus having a pin alignment assembly including lead-in and/or catch features.
- 2. Background of Related Art
- Surgical stapling instruments used for applying parallel rows of staples through compressed living tissue are well known in the art, and are commonly used, for example, for closure of tissue or organs prior to trans-section, prior to resection, or in anastomoses, and for occlusion of organs in thoracic and abdominal procedures.
- Typically, such surgical stapling instruments include an anvil assembly, a cartridge assembly for supporting an array of surgical staples, an approximation mechanism for approximating the anvil and cartridge assemblies, an alignment pin assembly for capturing tissue between the cartridge and anvil assemblies and for maintaining alignment between the cartridge and anvil assemblies during approximation and firing, and a firing mechanism for ejecting the surgical staples from the cartridge assembly. The approximation mechanism and the firing mechanism can include distinct actuators for effecting approximation and firing of the staples. An alignment pin assembly advances an alignment pin from the cartridge assembly into engagement with the anvil. The alignment pin assembly can be automatically actuated upon operation of the approximation mechanism and/or manually operated.
- Typically, the distal end of the alignment pin is received within an opening formed in the anvil assembly. The opening formed in the anvil assembly is typically sized slightly larger in diameter than the diameter of the alignment pin being received therein. This configuration prevents lateral movement of the alignment pin prior to and during firing of the surgical staples.
- It would be advantageous to provide an improved alignment pin assembly to expand manufacturing tolerances and accommodate for misalignment.
- In one aspect of the present disclosure, an alignment pin assembly is provided including an alignment pin configured to be advanced prior to actuation of a stapler and an end cap defining an opening configured to receive the alignment pin prior to actuation of the stapler. The end cap includes an alignment pin contact area formed about the opening configured to direct the alignment pin into the opening.
- The alignment pin contact area may define a substantially V-shaped or U-shaped profile. In some embodiments, the contact area can have curved surfaces. The alignment pin contact area may define in one embodiment an angle of about one-hundred fifty degrees to about one-hundred seventy degrees, and preferably in one embodiment an angle of about one-hundred sixty degrees. The end cap may be configured for reception on a distal end of an anvil assembly. Alternatively, the end cap may be integrally formed with an anvil assembly.
- In one embodiment, the end cap may include a boss feature on a distal side of the opening for frictionally engaging the alignment pin. The boss feature can include at least a first and second boss member. Each of the boss members may include an alignment pin engagement surface.
- Also provided in another aspect is a surgical stapler including a handle assembly, an elongated body extending from the handle assembly, a cartridge assembly mounted on the distal end of the elongated body and including an alignment pin configured for advancement from the cartridge assembly, and an anvil assembly positioned distal of the cartridge assembly. The anvil assembly includes an opening configured to receive the alignment pin, the opening including an angled alignment pin contacting area to provide a lead in configuration.
- In one embodiment, the alignment pin contact area defines a substantially V-shaped profile, while in another embodiment the alignment pin contact area defines a substantially U-shaped profile. The alignment pin contact area can define curved surfaces. The alignment pin contact area may define an angle of about one-hundred fifty degrees to about one-hundred seventy degrees, and preferably in one embodiment may define an angle of about one-hundred sixty degrees. The end cap may include a boss feature for frictionally engaging the alignment pin. The boss feature may include at least a first and second boss member. Each of the boss members may include an alignment pin engagement surface. The surgical stapler can have in some embodiments a tolerance equal to approximately half the width of the contact area, thereby enabling the alignment pin to be directed within the opening if a lateral misalignment from the opening is less than or equal to a distance measuring up to approximately half the width of the contact area.
- Embodiments of the presently disclosed surgical stapling apparatus are described herein with reference to the drawings, wherein:
-
FIG. 1 is a perspective view of a prior art surgical stapling device; -
FIG. 2 is an enlarged perspective view of the distal end of the prior art surgical stapling device ofFIG. 1 ; -
FIG. 3 is an enlarged perspective view of a portion of the anvil assembly of the prior art surgical stapling device ofFIG. 1 ; -
FIG. 4 is a cross-sectional schematic view of the anvil assembly and alignment pin of the prior art surgical stapling device ofFIG. 1 ; -
FIG. 5 is an enlarged perspective view of the distal end of the surgical stapling device ofFIG. 1 including an end cap according to an embodiment of the present disclosure; -
FIG. 6 is an enlarged perspective view ofdetail 6 ofFIG. 5 ; -
FIG. 7 is a cross-sectional end view taken along line 7-7 ofFIG. 6 -
FIG. 8 is an enlarged end view ofdetail 6 ofFIG. 5 with the alignment pin in the retracted position and not shown; -
FIG. 9 is a cross-sectional view of the end cap and alignment pin ofFIG. 5 prior to engagement of the alignment pin with the end cap; -
FIG. 10 is a cross-sectional view of the end cap and alignment pin ofFIG. 5 upon engagement of the alignment pin with the end cap; -
FIG. 11 is an enlarged end view of a distal end of an anvil assembly including an alternative embodiment of an end cap according to the present disclosure; -
FIG. 12 is an enlarged side view of the distal end of the anvil assembly ofFIG. 11 ; and -
FIG. 13 is an enlarged perspective view of the end cap ofFIG. 11 . - Embodiments of the presently disclosed alignment pin assembly will now be described in detail with reference to the drawings, wherein like reference numerals designate corresponding elements in each of the several views. Throughout this description, the term “proximal” will refer to the portion of the instrument closer to the operator and the term “distal” will refer to the portion of the instrument further from the operator.
- A prior art
surgical stapling device 10 is shown inFIGS. 1-3 . Briefly,stapling device 10 includes astationary handle 14, apivotable trigger 16, an elongatedcentral body portion 18, acartridge assembly 20 and ananvil assembly 22.Thumb buttons 24 are slidably positioned on each side ofbody 12 and are movable to manually advance analignment pin 38 distally fromcartridge assembly 20. (Thepin 38 can alternately be automatically advanced upon actuation oftrigger 16.) A release button 26 is positioned on the proximal portion ofbody 12 and is depressible to allowcartridge assembly 20 to return from an approximated position disposed adjacent toanvil assembly 22 to a position spaced fromanvil assembly 22. - With particular reference to
FIGS. 2 and 3 ,anvil assembly 22 includes ananvil 36. Anvil 36 includes anopening 67 configured to receivealignment pin 38 therethrough during operation ofstapling device 10. Anvilassembly 22 further includes acap 39.Cap 39 providesanvil assembly 22 with a smooth surface which is less likely to snag tissue during use. - Turning now to
FIG. 4 , opening 67 formed inanvil 36 includes a diameter slightly larger than the diameter ofalignment pin 38.Alignment pin 38 may include a tapered or rounded distalfree end 38 a. As depicted inFIG. 4 , the size and configuration ofalignment pin 38 andopening 67 providessurgical stapling device 10 with a tolerance equal to approximately half of the width ofalignment pin 38, or a distance “x”. In this manner,alignment pin 38 may be laterally misaligned a distance of “x” beforedistal end 38 a ofalignment pin 38 will not be received withinopening 67. In one embodiment, “x” is equal to about 0.039 inches. - The structure and function of
surgical stapler 10 has been described to the extent necessary to disclose the aspects of the present disclosure. A more detailed discussion of the structure and function of a surgical stapler that is substantially similar tosurgical stapler 10 is disclosed in commonly owned U.S. Pat. No. 6,817,508 (the '508 patent), the entire contents of which are incorporated by reference herein. Although described with reference tosurgical stapling device 10, the aspects of present disclosure may be modified for use with other stapling devices having an advanceable alignment pin. - With reference now to
FIGS. 5-7 , an embodiment of an end cap according to the present disclosure is shown generally asend cap 51.End cap 51 may be composed of plastic, polymer or any other suitable material.End cap 51 defines a substantially D-shaped member configured to be received over an end ofanvil assembly 22.End cap 51 may be frictionally secured toanvil assembly 22 or may instead be secured thereto using adhesives, mechanical fasteners or the like. It could also have a snap in feature or interlocking structure to engage an upper or side surface of the anvil assembly and optionally glued for additional holding. In some embodiments,end cap 51 is integrally (monolithically) formed withanvil assembly 22. As shown,end cap 51 is configured to be received on a pre-existing stapler; however, it is also envisioned that surgical staplers may be modified to incorporate the end cap. It is envisioned that the aspects of the present disclosure may be modified for use with any instrument including an alignment pin. As shown,end cap 51 is positioned above (in the orientation ofFIG. 6 ) the rows of staple forming anvil depressions. - With reference to
FIGS. 8-10 ,end cap 51 defines anopening 53 configured to align with an opening formed inanvil 36 ofstapler 10 whenend cap 51 is securely received onanvil assembly 22.End cap 51 defines an alignmentpin contact area 55 about opening 53 which provides a lead in feature. Alignmentpin contact area 55 is configured to directalignment pin 38 towardsopening 53. The width of alignmentpin contact area 55 is limited only by the width ofend cap 51. Alignmentpin contact area 55 in the illustrated embodiment includes a substantially V-shaped profile defining an angle α, ranging in one embodiment by way of example from about one-hundred fifty degrees (150°) to about one-hundred seventy degrees (170°), and preferably, in one embodiment, about one-hundred sixty degrees (160°). In an alternate embodiment, alignmentpin contact area 55 includes a substantially U-shaped profile. Anupper portion 55 a of alignmentpin contact area 55 also includes a curved or angled profile.Upper portion 55 a of alignmentpin contact area 55 is configured to further directdistal end 38 a ofalignment pin 38 towards opening 53 inend cap 51. In one embodiment, alignmentpin contact area 55 includes a coating, e.g., silicone, configured to reduce the friction betweendistal end 38 a ofalignment pin 38 andend cap 51 to facilitate sliding ofalignment pin 38 against alignmentpin contact area 55. - With particular reference now to
FIG. 7 , the alignment pin catch feature is illustrated.End cap 51 includes aboss feature 57 configured for frictionally engaging and retainingalignment pin 38 upon receipt ofdistal end 38 a ofalignment pin 38 throughopening 53.Boss feature 57 is configured to prevent premature retraction ofalignment pin 38 during the actuation ofstapler 10 by the interference fit provided by theridges Boss feature 57 includes first andsecond boss members boss members end cap 51 may include one or more than two boss members. First andsecond boss members pin engagement surface alignment pin 38 asdistal end 38 a ofalignment pin 38 is received throughopening 53. Pin engagement surfaces 59 a, 59 b may include a ridge, as shown, or may be otherwise configured to frictionally engagedistal end 38 a ofalignment pin 38. Pin engagement surfaces 59 a, 59 b may include a coating, i.e., rubber (not shown), for more securely engagingalignment pin 38. - The operation of
alignment end cap 51 will be described with particular reference toFIGS. 9 and 10 . As noted above,alignment pin 38 may be advanced manually using thumb buttons such asbutton 24 ofFIG. 1 . Alternatively,alignment pin 38 is automatically advanced during actuation of the device such assurgical stapling device 10 ofFIG. 1 . Advancement ofalignment pin 38, in the direction indicated by arrow “A”, directs thedistal end 38 a ofalignment pin 38 toward opening 53 ofend cap 51. However, during advancement ofalignment pin 38, ifalignment pin 38 is out of alignment with opening 53 ofcap 51, it will contactpin contact area 55. Engagement ofdistal end 38 a ofalignment pin 38 with alignmentpin contact area 55 causes the directing ofalignment pin 38 towards opening 53 ofend cap 51, in the direction indicated by arrow “B”. Upon complete advancement ofalignment pin 38, in the direction indicated by arrow “C”,distal end 38 a ofalignment pin 38 is received within opening 53 ofend cap 51. - As depicted in
FIGS. 9 and 10 , the size and configuration ofalignment pin 38 andend cap 51 providessurgical stapling device 10 with a tolerance equal to approximately half of the width of alignmentpin contact area 55, or a distance “y”. In this manner,alignment pin 38 may be laterally misaligned from opening 53 a distance of “y” beforedistal end 38 a ofalignment pin 38 will not be directed withinopening 53. In one embodiment, “y” is equal to about 0.157 inches. - Each of pin engagement surfaces 59 a, 59 b, of respective first and
second boss members boss feature 57 engagedistal end 38 a ofalignment pin 38 asalignment pin 38 is received throughopening 53. In this manner,boss feature 57 frictionally retainsalignment pin 38 in the advanced position, thereby preventing premature retraction ofalignment pin 38. Application of a sufficient proximal force will enable release fromboss feature 57. 100361 With reference now toFIGS. 11-13 , an alternate embodiment of an end cap according to the present disclosure is shown generally asend cap 151.End cap 151 is substantially similar to endcap 51, described hereinabove, and will therefore only be described as relates to the differences therebetween.End cap 151 is configured for secure engagement with ananvil assembly 122.End cap 151 has a spherical alignmentpin contact area 155 with the curved surfaces directing thealignment pin 38 ofFIGS. 8-9 towardopening 153.End cap 151 may be frictionally received onanvil assembly 122 or may instead be mechanically fastened, adhered, welded or otherwise secured thereto. End cap can alternatively be monolithically (integrally) formed with the anvil assembly. In use, alignmentpin contact area 155 directs an alignment pin (not shown) intoopening 153 formed therein if the alignment pin is misaligned and contacts thecontact area 155 in a similar manner ascontact area 55.End cap 151 may include a boss feature (not shown) as in the embodiment ofFIG. 7 . - It will be understood that various modifications may be made to the embodiments disclosed herein. For example, the components of the alignment pin assembly may be modified for use with other instruments including an alignment pin. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.
Claims (21)
1-19. (canceled)
20. A surgical stapler comprising:
an alignment pin movable from a retracted position to an advanced position; and
an anvil assembly defining an opening positioned to receive the alignment pin, the anvil assembly including a boss feature positioned to frictionally engage the alignment pin with an interference fit when the alignment pin is in the advanced position to frictionally retain the alignment pin in the advanced position.
21. The surgical stapler of claim 20 , wherein the anvil assembly include an alignment pin contact area positioned to direct the alignment pin into the opening.
22. The surgical stapler of claim 21 , wherein the alignment pin contact area defines a substantially V-shaped profile.
23. The surgical stapler of claim 21 , wherein the alignment pin contact area defines curved surfaces.
24. The surgical stapler of claim 21 , wherein the alignment pin contact area defines an angle of one-hundred fifty degrees to one-hundred seventy degrees.
25. The surgical stapler of claim 20 , wherein anvil assembly includes an end cap and the end cap defines the opening.
26. The surgical stapler of claim 25 , wherein the anvil assembly further includes an anvil and the end cap is integrally formed with the anvil.
27. The surgical stapler of claim 20 , wherein the alignment pin is manually advanceable.
28. The surgical stapler of claim 20 , wherein the boss feature includes at least a first boss member and a second boss member and each of the boss members includes an alignment pin engagement surface.
29. A surgical stapler comprising:
a handle assembly;
an elongated body extending from the handle assembly;
a cartridge assembly mounted on a distal end of the elongated body;
an alignment pin supported on the cartridge assembly and movable from a retracted position to an advance position; and
an anvil assembly positioned distal of the cartridge assembly, the anvil assembly defining an opening positioned to receive the alignment pin and including a distally extending retaining feature positioned to frictionally engage and frictionally retain the alignment pin with an interference fit when the alignment pin is advanced from the cartridge assembly.
30. The surgical stapler of claim 29 , wherein the anvil assembly includes an alignment pin contact area.
31. The surgical stapler of claim 30 , wherein alignment pin contact area defines a substantially V-shaped profile.
32. The surgical stapler of claim 29 , wherein the alignment pin contact area defines a curved profile.
33. The surgical stapler of claim 30 , wherein the alignment pin contact area defines an angle of one-hundred fifty degrees to one-hundred seventy degrees.
34. The surgical stapler of claim 29 , wherein the retaining feature includes at least one boss member.
35. The surgical stapler of claim 34 , wherein the at least one boss member includes ridges.
36. The surgical stapler of claim 29 , wherein the opening is formed on an end cap of the anvil assembly.
37. The surgical stapler of claim 29 , wherein the anvil assembly defines anvil depressions and the opening is spaced from the anvil depressions.
38. The surgical stapler of claim 30 , wherein the alignment pin contact area has a width and the surgical stapler has a tolerance equal to approximately half of the width, thereby enabling the alignment pin to be directed within the opening if a lateral misalignment from the opening is less than or equal to a distance measuring up to approximately half of the width of the alignment pin contact area.
39. An alignment pin assembly for a surgical stapler comprising:
an alignment pin movable between a retracted position and an advanced position; and an end cap defining an opening positioned to receive the alignment pin, wherein the end cap includes a boss feature positioned to frictionally engage and frictionally retain the alignment pin with an interference fit when the alignment pin is moved to the advanced position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/446,940 US20140339287A1 (en) | 2010-03-25 | 2014-07-30 | Pin alignment assembly for surgical stapler |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US31739410P | 2010-03-25 | 2010-03-25 | |
US13/028,608 US8827137B2 (en) | 2010-03-25 | 2011-02-16 | Pin alignment assembly for surgical stapler |
US14/446,940 US20140339287A1 (en) | 2010-03-25 | 2014-07-30 | Pin alignment assembly for surgical stapler |
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US13/028,608 Continuation US8827137B2 (en) | 2010-03-25 | 2011-02-16 | Pin alignment assembly for surgical stapler |
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US20140339287A1 true US20140339287A1 (en) | 2014-11-20 |
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US13/028,608 Expired - Fee Related US8827137B2 (en) | 2010-03-25 | 2011-02-16 | Pin alignment assembly for surgical stapler |
US14/446,940 Abandoned US20140339287A1 (en) | 2010-03-25 | 2014-07-30 | Pin alignment assembly for surgical stapler |
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US13/028,608 Expired - Fee Related US8827137B2 (en) | 2010-03-25 | 2011-02-16 | Pin alignment assembly for surgical stapler |
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US (2) | US8827137B2 (en) |
EP (1) | EP2368503B1 (en) |
JP (1) | JP5808925B2 (en) |
CN (2) | CN104856736B (en) |
AU (2) | AU2011200918B2 (en) |
CA (1) | CA2733215C (en) |
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JP1749936S (en) * | 2022-04-08 | 2023-08-01 | Anvil Forming Surgical Stapler | |
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US4272002A (en) * | 1979-07-23 | 1981-06-09 | Lawrence M. Smith | Internal surgical stapler |
US4573622A (en) * | 1984-10-19 | 1986-03-04 | United States Surgical Corporation | Surgical fastener applying apparatus with variable fastener arrays |
US5071052A (en) * | 1988-09-22 | 1991-12-10 | United States Surgical Corporation | Surgical fastening apparatus with activation lockout |
US5810240A (en) * | 1996-03-15 | 1998-09-22 | United States Surgical Corporation | Surgical fastener applying device |
US5772099A (en) * | 1996-04-01 | 1998-06-30 | United States Surgical Corporation | Surgical fastening apparatus with alignment pin |
US6470541B1 (en) * | 2001-04-17 | 2002-10-29 | Louis L. Lerner | Fabric anchor |
US20100282820A1 (en) * | 2009-05-06 | 2010-11-11 | Dino Kasvikis | Pin locking mechanism for a surgical instrument |
US20110155783A1 (en) * | 2009-12-31 | 2011-06-30 | Ranjit Rajappa | Indicators for surgical staplers |
Also Published As
Publication number | Publication date |
---|---|
AU2011200918B2 (en) | 2015-11-12 |
JP5808925B2 (en) | 2015-11-10 |
CN104856736B (en) | 2018-01-02 |
AU2016200307A1 (en) | 2016-02-11 |
EP2368503A1 (en) | 2011-09-28 |
CA2733215A1 (en) | 2011-09-25 |
AU2011200918A1 (en) | 2011-10-13 |
CN104856736A (en) | 2015-08-26 |
CA2733215C (en) | 2017-10-24 |
US8827137B2 (en) | 2014-09-09 |
CN102247181B (en) | 2015-05-27 |
JP2011200650A (en) | 2011-10-13 |
AU2016200307B2 (en) | 2017-06-01 |
US20110233261A1 (en) | 2011-09-29 |
CN102247181A (en) | 2011-11-23 |
EP2368503B1 (en) | 2018-02-21 |
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