System and method for improved gas recirculation in surgical trocars with pneumatic sealing

• US 9,095,372 B2
• Filed: 06/06/2014
• Issued: 08/04/2015
• Est. Priority Date: 09/08/2006
• Status: Active Grant

• Current Assignee: Surgiquest, Inc. (Jefferies Financial Group, Inc.)
• Original Assignee: Surgiquest, Inc. (Jefferies Financial Group, Inc.)
• Inventors: Stearns, Ralph, Azarbarzin, Kurt, Nolan, Timothy J.
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): LEE, WENG WAH
• Application Number:
  US14/298,419
• Publication Number:
  US 20140309583A1
• Time in Patent Office: 424 Days
• Field of Search: 604 23- 26, 604/506, 604156-161, 604/264, 604/272
• US Class Current: 1/1
• CPC Class Codes: A61B 17/3421 Cannulas
• 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 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00544 pneumatically
• 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 16/201 Controlled valves
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2205/3337 Controlling, regulating pressure or flow by means of a valve by-passing a pump

Abstract

Systems for insufflation and recirculation of insufflation fluid in a surgical procedure include a control unit having a fluid pump, a supply conduit, a return fluid conduit and a pressure-controlled valve. The pressure-controlled valve is in fluid communication with an insufflation gas supply, the supply conduit and the return conduit and is adapted and configured to respond to pressure control signals to adjust position and thereby system flow parameters, to reduce entrainment of air from the surrounding environment, and to increase the concentration of insufflation gas in an operative space, and/or to reduce an overpressure condition in the operative space.

Claims

1. A surgical access device 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 outer tubular member, the inner tubular member defining a central lumen for introduction of a surgical instrument therethrough;

c) an insufflation conduit defined between the inner and outer tubular members in communication with a source of humidified insufflation gas; and

d) a plurality of apertures extending through an outer surface of the distal portion of the outer tubular member in fluid communication with the insufflation conduit and configured to laterally discharge humidified insufflation gas from the insufflation conduit into the peritoneum of a patient,

wherein the distal end portion of the outer tubular member and the distal end portion of the inner tubular member cooperate to enclose the insufflation conduit such that the humidified insufflation gas is discharged only from the plurality of apertures.

2. The surgical access device of claim 1, wherein the insufflation conduit extends from a housing at the proximal portion of the surgical access device, the housing in communication with a supply conduit to facilitate supply of the humidified insufflation gas to the insufflation conduit.

3. The surgical access device of claim 1, wherein the source of humidified insufflation gas is external to the surgical access device.

4. A system for delivering humidified insufflation gas, comprising:

a) a trocar assembly having an elongated outer tubular member having opposed proximal and distal end portions and having a longitudinal axis extending therethrough and an elongated inner tubular member having opposed proximal and distal end portions and being arranged coaxially within the outer tubular member so as to form an insufflation conduit therebetween that extends from the proximal end portion of the outer tubular member to the distal end portion of the outer tubular member, the inner tubular member defining a central lumen for introduction of a surgical instrument therethrough, the insufflation conduit being in fluid communication with a plurality of apertures extending through an outer surface of the distal portion of the outer tubular member, and

b) a source of humidified insufflation gas in fluid communication with the insufflation conduit,

wherein humidified insufflation gas is laterally discharged from the plurality of apertures into the peritoneum of a patient and wherein the distal end portion of the outer tubular member and the distal end portion of the inner tubular member cooperate to enclose the insufflation conduit such that the humidified insufflation gas is discharged only from the plurality of apertures.

5. The system of claim 4, wherein the insufflation conduit extends from a housing at the proximal portion of the trocar assembly, the housing in communication with a supply conduit to facilitate supply of the humidified insufflation gas to the insufflation conduit.

6. The system of claim 4, wherein the source of humidified a insufflation gas is external to the trocar assembly.

7. A surgical access device 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 portion and being arranged coaxially within the outer tubular member, the inner tubular member defining a central lumen for introduction of a surgical instrument therethrough;

c) an insufflation conduit defined between the inner and outer tubular members in communication with a source of conditioned insufflation gas; and

d) a plurality of apertures extending through an outer surface of the distal portion of the outer tubular member in fluid communication with the insufflation conduit and configured to radially discharge conditioned insufflation gas from the insufflation conduit into the peritoneum of a patient,

wherein the distal end portion of the outer tubular member and the distal end portion of the inner tubular member cooperate to enclose the insufflation conduit such that the conditioned insufflation gas is discharged only from the plurality of apertures.

8. The surgical access device of claim 7, wherein the insufflation conduit extends from a housing at the proximal portion of the surgical access device, the housing in communication with a supply conduit to facilitate supply of the conditioned insufflation gas to the insufflation conduit.

9. The surgical access device of claim 7, wherein the source of conditioned insufflation gas is external to the surgical access device.

10. The surgical access device of claim 7, wherein the conditioned insufflation gas is humidified insufflation gas.

11. The surgical access device of claim 7, wherein the conditioned insufflation gas is heated insufflation gas.