Devices and methods for cutting surgical components
Surgical instruments for cutting surgical components either in situ or ex situ are disclosed. The surgical instruments can include a translating anvil that can be driven relative to an outer sleeve by a rotating an inner sleeve relative to the outer sleeve. The outer sleeve can be separable into a distal tip and a proximal base tube that can be modularly coupled to one another and selectively locked against separation. A distal portion of the outer sleeve can include a hooked shape with an opening to receive a rod or other component therein that can be selectively closed by a pivoting capture arm. Actuation of the instrument can occur by manual user power or by powered instrument, such as a driver. The outer sleeve can interface with additional instruments or components, such as a counter-torque handle, to prevent rotation thereof during actuation of the inner sleeve relative thereto.
1 . A surgical instrument comprising:
an outer sleeve having a lumen;
an opening formed in a sidewall of the outer sleeve and configured to receive at least a portion of an implant therethrough;
a capture arm disposed within the opening, the capture arm being pivotably coupled to the outer sleeve and configured to selectively expose the opening to allow the implant to pass therethrough;
an inner sleeve disposed in the lumen of the outer sleeve, the inner sleeve having a lumen and being configured to rotate relative to the outer sleeve; and
an anvil configured to be inserted through the lumen of the inner sleeve to a position that is distal to the inner sleeve, the anvil being configured to translate without rotating relative to the outer sleeve to cut the implant.
2 . The instrument of claim 1 , wherein the inner sleeve is configured to rotate relative to the outer sleeve to translate the anvil distally with respect to the outer sleeve.
3 . The instrument of claim 2 , wherein the anvil further comprises a cutting tip at a distal end thereof for cutting the implant.
4 . The instrument of claim 3 , wherein the cutting tip is V-shaped.
5 . The instrument of claim 1 , wherein the anvil includes a coating configured to enhance a hardness thereof.
6 . The instrument of claim 1 , wherein the implant comprises one or more of a spinal rod, a trauma plate, or a craniomaxillofacial (CMF) plate.
7 . The instrument of claim 1 , wherein the capture arm is biased to be disposed within the opening.
8 . The instrument of claim 7 , wherein the capture arm is biased by a spring disposed in a channel formed in the capture arm that exerts a radially outward force onto the capture arm.
9 . The instrument of claim 1 , further comprising a pocket formed on an inner surface of a sidewall of the outer sleeve opposite the opening, the pocket being configured to receive the capture arm when the capture arm selectively exposes the opening.
10 . The instrument of claim 1 , further comprising a counter-torque handle configured to mate with the outer sleeve to prevent rotation of the outer sleeve during rotation of the inner sleeve.
11 . The instrument of claim 1 , wherein the outer sleeve includes a sharpened edge positioned to contact an implant on an opposite side from the anvil.
12 . The instrument of claim 1 , wherein a proximal end of the inner sleeve comprises a drive feature configured to couple with a torque application device to facilitate rotation of the inner sleeve.
13 . The instrument of claim 1 , wherein the capture arm is configured to pivot to expose the opening in response to a force applied to the capture arm by the implant.