Patent ID: 7963975

Claim:
A surgical instrument comprising: a balloon tip cannula assembly, including: a cannula housing, a cannula tube extending distally from the cannula housing, the cannula housing having a balloon anchor at a distal end of the cannula tube, and a skin seal movable along the cannula tube; a balloon dissector assembly configured to be received through a proximal opening of the balloon tip cannula assembly, the balloon dissector assembly being engageable and disengageable from the balloon tip cannula assembly, the balloon dissector assembly including: a dissector housing, a dissector tube including a proximal end, the dissector tube extending distally from the dissector housing, and a dissection balloon mounted on a distal end of the dissector tube; an obturator having a distal tip configured to be received through proximal openings of the balloon tip cannula assembly and the balloon dissector, the distal tip of the obturator supporting and contacting the dissection balloon, the obturator being separable and removable from the balloon tip cannula assembly prior to and after inflation of the dissection balloon; and one of the dissector housing and cannula housing including a latching structure having a latch, and the other of the dissector housing and cannula housing having a recess for receipt of the latch of the latching structure, wherein the cannula housing and the dissector housing are releasably coupled to one another.