Clip applier configured to prevent clip fallout
First Claim
1. An improved endoscopic surgical clip applier having jaws which close together to approximate tissues to be clipped, a push rod adapted to close the jaws, a trigger adapted to actuate the push rod, and a ratchet mechanism adapted to prevent the trigger from opening during at least a portion of a closing stroke, the improvement comprising:
- a preloaded rotary joint formed between the push rod and a linkage coupling the push rod to the trigger, the preloaded rotary joint being effective to maintain the jaws in a substantially fixed partially closed position when the trigger is partially opened during a closing stroke to retain a partially formed clip between the jaws, wherein the preloaded rotary joint includes a biasing element disposed in a recess that includes at least one ridge formed therein configured to maintain the biasing element at a substantially constant load during a closing stroke and up through full closure of the jaws.
4 Assignments
0 Petitions
Accused Products
Abstract
A surgical clip applier and methods for applying surgical clips to a vessel, duct, shunt, etc., during a surgical procedure are provided. In one exemplary embodiment, a surgical clip applier is provided having a housing with a trigger movably coupled thereto and a shaft extending therefrom with opposed jaws formed on a distal end thereof. The trigger is adapted to advance a clip to position the clip between the jaws, and to move the jaws from an open position to a closed position to crimp the clip positioned therebetween. The surgical clip applier can include a variety of features to facilitate use of the device, including features to align a clip with the jaws, features to prevent unintentional migration of a clip, and features to prevent clip fallout during formation.
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Citations
17 Claims
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1. An improved endoscopic surgical clip applier having jaws which close together to approximate tissues to be clipped, a push rod adapted to close the jaws, a trigger adapted to actuate the push rod, and a ratchet mechanism adapted to prevent the trigger from opening during at least a portion of a closing stroke, the improvement comprising:
a preloaded rotary joint formed between the push rod and a linkage coupling the push rod to the trigger, the preloaded rotary joint being effective to maintain the jaws in a substantially fixed partially closed position when the trigger is partially opened during a closing stroke to retain a partially formed clip between the jaws, wherein the preloaded rotary joint includes a biasing element disposed in a recess that includes at least one ridge formed therein configured to maintain the biasing element at a substantially constant load during a closing stroke and up through full closure of the jaws. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A surgical clip applier, comprising:
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a handle with a shaft extending therefrom, the shaft being rotatable relative to the handle; jaws formed on a distal end of the shaft; a jaw closing mechanism extending through the shaft and coupled to the jaws; a trigger adapted to actuate the jaw closing mechanism to close the jaws during a closing stroke; and a preloaded joint formed between the jaw closing mechanism and the trigger and being advancable distally by the trigger during a closing stroke, the preloaded joint being configured to prevent a clip from falling out of the jaws when the trigger is partially opened during the closing stroke, and the preloaded joint including a biasing element disposed in a recess that includes at least one ridge formed therein configured to maintain the biasing element at a substantially constant load during a closing stroke and up through full closure of the jaws. - View Dependent Claims (9, 10, 11, 12)
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13. A surgical clip applier, comprising:
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a housing; a shaft extending distally from the housing, the shaft being rotatable relative to the housing; first and second jaws formed on a distal end of the shaft; a trigger movably coupled to the housing; an anti-backup mechanism adapted to engage the trigger when the trigger is released during at least a partial closing stroke; and an assembly coupled between the trigger and the jaws and adapted to maintain the jaws in a substantially fixed position to prevent clip fallout when the trigger is released during at least a partial closing stroke, the assembly including a recess and a biasing element formed in the recess, the recess including at least one ridge configured to prevent the biasing element from deflecting under compression during final stages of a closing stroke of the trigger. - View Dependent Claims (14, 15, 16)
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17. An improved endoscopic surgical clip applier having jaws which close together to approximate tissues to be clipped, a push rod adapted to close the jaws, a trigger adapted to actuate the push rod, and a ratchet mechanism adapted to prevent the trigger from opening during at least a portion of a closing stroke, the improvement comprising:
a preloaded rotary joint formed between the push rod and a linkage coupling the push rod to the trigger, the preloaded rotary joint being effective to maintain the jaws in a substantially fixed partially closed position when the trigger is partially opened during a closing stroke to retain a partially formed clip between the jaws, and the preloaded rotary joint including a biasing element being formed in a recess that includes at least one ridge formed therein and adapted to maintain the biasing element at a substantially constant load as the biasing element is compressed during a closing stroke.
Specification