# US 10,369,303 B2 · Trocar assembly with pneumatic sealing

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- Number: US 10,369,303 B2
- Document ID: US10369303B2
- Status: Granted
- Kind: B2
- Application number: 14/196,176
- Filed: 2014-03-04
- Published: 2014-07-03
- Granted: 2019-08-06
- Earliest claimed: 2003-04-08
- Assignees: Conmed Corporation
- Applicants: SurgiQuest, Inc.
- Inventors: Ralph Stearns; Jack B. Stubbs
- Web page: https://patentgrep.com/patent/US10369303B2

## CPC

- A61M 13/003: {Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing}
- A61B 17/3421: {Cannulas}
- A61B 17/3423: {Access ports, e.g. toroid shape introducers for instruments or hands (access sites for liquids A61M39/0247)}
- 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)}
- A61B 17/3474: {Insufflating needles, e.g. Veress needles}
- A61B 17/3498: {Valves therefor, e.g. flapper valves, slide valves (haemostasis valves A61M39/06; check valves A61M39/24)}
- A61M 1/28: Peritoneal dialysis {; Other peritoneal treatment, e.g. oxygenation}
- A61M 13/006: {with gas recirculation}
- A61B 2017/00265: {Hand assisted surgery, i.e. minimally invasive surgery with at least part of an assisting hand inside the body}
- A61B 2090/064: {for measuring force, pressure or mechanical tension}
- A61M 2202/0225: Carbon oxides, e.g. Carbon dioxide
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## 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

### Claim 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.