Surgical stapling device
AssigneeCovidien LP
InventorJoseph Guerrera
Life of this patent
Estimating the term…
Abstract
A stapling device includes a shell assembly, an anvil retainer assembly, an anvil assembly, and a strain gauge. The shell assembly includes a housing including an inner housing portion that defines a through bore and supports at least one detection member or leg. The anvil assembly includes an anvil head and an anvil center rod having a boss. The at least one detection leg is positioned to engage the boss of the center rod to obstruct movement of the anvil assembly in relation to the shell assembly between an open position and a clamped position. The strain gauge is positioned to identify increased strain in the stapling device when the at least one detection leg engages the boss. This allows a clinician to confirm that an anvil assembly is properly attached to the stapling device prior to firing of the stapling device.
Claims21
A stapling device comprising:
- a shell assembly including a housing and a staple cartridge, the housing having a distal portion, a proximal portion, an outer housing portion and an inner housing portion, the outer housing portion and the inner housing portion defining an annular cavity, the inner housing portion defining a through bore and having a distal portion supporting at least one detection member within the annular cavity, the staple cartridge being supported on the distal portion of the housing;
- an anvil retainer assembly being movable between retracted and advanced positions within the through bore;
- an anvil assembly including an anvil head and an anvil center rod, the anvil center rod having a proximal portion, a distal portion, and a boss, the anvil head being supported on the distal portion of the anvil center rod, the proximal portion of the anvil center rod being adapted to releasably couple with the anvil retainer assembly, the anvil assembly being movable in relation to the shell assembly between an open position and a clamped position;
- and
- a strain gauge;
- wherein the at least one detection member is positioned to engage the boss of the anvil center rod to obstruct movement of the anvil assembly between the open position and the clamped position, the strain gauge being positioned to identify increased strain in the stapling device when the at least one detection member engages the boss.
A shell assembly comprising:
- a housing including a distal portion, a proximal portion, an outer housing portion and an inner housing portion, the outer housing portion and the inner housing portion defining an annular cavity, the inner housing portion defining a through bore, the inner housing portion of the housing having a distal portion supporting at least one detection member within the annular cavity, the at least one detection member having a radial portion extending towards the through bore and being positioned to engage a portion of a center rod of an anvil assembly positioned within the through bore.
A shell assembly comprising:
- a housing including a distal portion, a proximal portion, an outer housing portion and an inner housing portion, the outer housing portion and the inner housing portion defining an annular cavity, the inner housing portion defining a through bore, the inner housing portion of the housing having a distal portion supporting at least one detection member within the annular cavity, the at least one detection member having a radial portion extending towards the through bore and being positioned to engage a portion of a center rod of an anvil assembly positioned within the through bore, wherein the at least one detection member is formed of a resilient material such that the at least one detection member can flex to move the radial portion of the at least one detection member outwardly of the through bore.
Dependencies are inferred from the claim text.