Trocar assembly with pneumatic sealing

• US 10,369,303 B2
• Filed: 03/04/2014
• Issued: 08/06/2019
• Est. Priority Date: 04/08/2003
• Status: Expired due to Term

• Current Assignee: Conmed Corporation (Jefferies Financial Group, Inc.), Surgiquest, Inc. (Jefferies Financial Group, Inc.)
• Original Assignee: Conmed Corporation (Jefferies Financial Group, Inc.)
• Inventors: Stearns, Ralph, Stubbs, Jack B.
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Schell, Laura C
• Application Number:
  US14/196,176
• Publication Number:
  US 20140188038A1
• Time in Patent Office: 1,981 Days
• Field of Search: 604 23- 26
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 17/3423 Access ports, e.g. toroid shape introducers for instruments or hands access sites for liquids A61M39/0247
• CPC Class Codes: A61B 17/3462 with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals expandable cannulas A61B17/3417
• CPC Class Codes: A61B 17/3474 Insufflating needles, e.g. Veress needles
• CPC Class Codes: A61B 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24
• CPC Class Codes: A61B 2017/00265 Hand assisted surgery, i.e. minimally invasive surgery with at least part of an assisting hand inside the body
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 13/003 Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing
• CPC Class Codes: A61M 13/006 with gas recirculation
• CPC Class Codes: A61M 2202/0225 Carbon oxides, e.g. Carbon dioxide
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site

Abstract

A trocar for use in a minimally invasive surgical procedure includes an elongated body, nozzle means and means for delivering a pressurized flow of fluid to the nozzle means. The elongated body has a generally tubular configuration with coaxially arranged inner and outer walls and longitudinally opposed proximal and distal end portions, with the inner wall defining a lumen to accommodate passage of an instrument therethrough. The nozzle means is operatively associated with the inner wall of the body for directing pressurized fluid into the lumen to develop a pressure differential in an area within a region extending from a location adjacent a distal end portion of the lumen to a location adjacent a proximal end portion of the lumen, to form a fluid seal around an instrument passing therethrough.

Claims

1. A trocar assembly comprising:

a) an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough;

b) an elongated inner tubular member having opposed proximal and distal end portions and being arranged coaxially within the elongated outer tubular member so as to form an annular gas flow passage therebetween, wherein a distal end portion of the trocar assembly defines an annular nozzle arrangement including an array of radially outwardly extending triangular jets arranged to direct humidified insufflation gas flowing through the annular gas flow passage into a patient'"'"'s body cavity, wherein a base of each triangular jet extends over an arcuate section of the annular gas flow passage that is defined between the elongated inner tubular member and the elongated outer tubular member;

c) a supply conduit for delivering the humidified insufflation gas to the annular gas flow passage; and

d) a pressure source communicating with the supply conduit for regulating a supply of the humidified insufflation gas to the annular gas flow passage based on body cavity pressure sensed by a pressure sensor.