Micro surgical instrument and loading unit for use therewith
First Claim
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1. A loading unit configured for engagement with a surgical instrument, the loading unit comprising:
- a proximal body portion;
an end effector disposed in mechanical cooperation with the proximal body portion, the end effector including a cartridge assembly and an anvil assembly, one of the cartridge assembly and the anvil assembly being movable with respect to the other of the cartridge assembly and the anvil assembly between an open position and an approximated position to capture tissue therebetween, the cartridge assembly configured to house fasteners therein;
an actuation sled longitudinally translatable within the cartridge assembly; and
pushers disposed within the cartridge assembly, the pushers arranged in first and second rows, each pusher including a camming surface configured for engagement with the actuation sled, wherein the camming surface of each pusher in the first row lies within a common longitudinal axis as the camming surface of each pusher in the second row, the first row of pushers laterally offset from the second row of pushers.
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Abstract
A loading unit for engagement with a surgical instrument. The loading unit includes a proximal body portion, an end effector, an actuation sled, and pushers. The actuation sled is longitudinally translatable within a cartridge assembly. The pushers are disposed within the cartridge assembly. Each pusher includes a camming surface configured for engagement with the actuation sled. The camming surface of each pusher in a first row is longitudinally aligned with the camming surface of each pusher in a second row. The first row of pushers is laterally offset from the second row of pushers.
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Citations
20 Claims
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1. A loading unit configured for engagement with a surgical instrument, the loading unit comprising:
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a proximal body portion; an end effector disposed in mechanical cooperation with the proximal body portion, the end effector including a cartridge assembly and an anvil assembly, one of the cartridge assembly and the anvil assembly being movable with respect to the other of the cartridge assembly and the anvil assembly between an open position and an approximated position to capture tissue therebetween, the cartridge assembly configured to house fasteners therein; an actuation sled longitudinally translatable within the cartridge assembly; and pushers disposed within the cartridge assembly, the pushers arranged in first and second rows, each pusher including a camming surface configured for engagement with the actuation sled, wherein the camming surface of each pusher in the first row lies within a common longitudinal axis as the camming surface of each pusher in the second row, the first row of pushers laterally offset from the second row of pushers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A pusher for use with a surgical instrument, comprising:
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a body portion including an upper edge configured to engage a fastener; a lateral extension extending perpendicularly from the body portion, an upper edge of the lateral extension is co-planar with the upper edge of the body portion; a first leg extending in a first direction from the lateral extension and including a first camming surface; and a second leg extending in a second direction from the lateral extension and including a second camming surface. - View Dependent Claims (17, 18, 19)
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20. A loading unit configured for engagement with a surgical instrument, the loading unit comprising:
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a proximal body portion defining a longitudinal axis; an end effector disposed in mechanical cooperation with the proximal body portion, the end effector including a cartridge assembly and an anvil assembly, one of the cartridge assembly or the anvil assembly being movable with respect to the other of the cartridge assembly or the anvil assembly between an open position and an approximated position to capture tissue therebetween, the cartridge assembly configured to house fasteners therein, the cartridge assembly including a tissue-contacting surface defining a plurality of T-shaped retention slots; an actuation sled longitudinally translatable within the cartridge assembly; and pushers disposed within the cartridge assembly, the pushers arranged in first and second rows, each pusher including a camming surface configured for engagement with the actuation sled, wherein the camming surface of each pusher in the first row is longitudinally aligned with the camming surface of each pusher in the second row, the first row of pushers laterally offset from the second row of pushers.
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Specification