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Obesity Surgery

Endoscopic-knot-pushing-instrument

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Endoscopic knot pushing instrument

Details

Inventors: Phillips, Edward H.; Raiken, Steve;
Assignee: Phillips; Edward H. (Beverly Hills, CA)
Primary Examiner: Graysay; Tamara L.
Assistant Examiner:
Attorney, Agent or Firm: Gotha; Frederick

An instrument is set forth for pushing a knot formed extracorporeally through a trocar and into the operative region during endoscopic surgery. An elongated member having an axially extending groove at its distal end is dimensioned to permit the axial advance of a strand of suture material through the groove. A locking sleeve is carried by the elongated member at its distal end and adapted for rotation relative to the elongated member. The locking sleeve has an axially extending slit which in one position may be aligned with the groove for insertion of the suture strand. By rotating the sleeve to a second position, the suture strand is captively retained within the groove so as to permit axial advance of the suture strand as the knot is pushed through the trocar.

DETAILED DESCRIPTION There is, therefore, provided according to the present invention, an endoscopic surgical instrument for pushing a slip-knot formed extracorporeally through a trocar and against a body structure to form a ligature where the strand of suture material above the slip-knot is retained within a distal suture slot while the knot is being tightened or pushed.
The present invention is directed to an endoscopic knot pushing instrument of the type having an elongated cylindrical member which has an axially extending continuously open tapered groove contained in the distal surface of the member.
The distal slot extends axially from the distal tip of the elongated member and extends at least in part towards the proximate end; the slot has a radially extending opening at the distal terminus of the elongated member which forms the maximum depth of the slot and permits the suture strand to advance axially through the slot; the slot tapers linearly from the distal end with diminishing depth as the slot extends proximately from the distal terminus.
A locking sleeve having an axially extending cavity therethrough is carried by the elongated member and adapted for rotation relative to it.
The locking sleeve is so dimensioned and proportioned to receive the distal end of the elongated member to permit rotation relative to the member and has an axially extending distal slit which communicates with the cavity.
Rotation of the sleeve to a first position permits the slit to be aligned with the axially extending slot.
Upon alignment of the slot and slit, the strand of suture material above the slip-knot formed extracorporeally may be inserted into the slot through the slit and upon rotation of the sleeve to a second position the suture strand will be locked in the slot by the sleeve thereby captively retaining the suture strand in the slot while at the same time permitting the strand to advance axially through the slot.
In one embodiment of this invention, the distal tip portion of the elongated member containing the slot may be a sleeve member made of a plastic material insertable over the distal tip of an elongated rod and rigidly mounted thereby forming the elongated member

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