Gas heater for surgical gas delivery system with gas sealed insufflation and recirculation

Patent metadata

Field	Value
Publication number	US-2022233793-A1
Application number	US-202117177467-A
Country	US
Kind code	A1
Filing date	Feb 17, 2021
Priority date	Jan 22, 2021
Publication date	Jul 28, 2022
Grant date	—

Abstract

A gas heater for a surgical gas delivery system is disclosed, which includes an elongated tubular body defining an interior flow passage having an inlet port for receiving insufflation gas from a gas source and an outlet port for delivering heated insufflation gas to an insufflation manifold, a dielectric support positioned within the interior flow passage of the tubular body, and a resistive element operatively associated with the dielectric support for heating insufflation gas flowing through the tubular body from the inlet port to the outlet port.

First claim

What is claimed is:

1 . A gas heater for a surgical gas delivery system comprising:
a) an elongated tubular body defining an interior flow passage having an inlet port for receiving insufflation gas from a gas source and an outlet port for delivering heated insufflation gas to an insufflation manifold; b) a dielectric support positioned within the interior flow passage of the tubular body; and c) a resistive element operatively associated with the dielectric support for heating insufflation gas flowing through the tubular body from the inlet port to the outlet port.

2 . The gas delivery system of claim 1 , wherein the dielectric support is an elongated support beam having a ribbed exterior surface and the resistive element is wrapped around the ribbed exterior surface of the support beam.

3 . The gas heater of claim 1 , wherein the dielectric support is an elongated support tube and the resistive element is partially wrapped around an exterior surface of the support tube and partially woven transversely through an interior bore of the support tube.

4 . The gas heater of claim 1 , wherein the dielectric support is formed at least in part from a ceramic material.

5 . The gas heater of claim 4 , wherein the dielectric support is formed from a ceramic-thermoset polymer composite.

6 . The gas heater of claim 1 , wherein the resistive element is formed from a nickel based alloy.

7 . The gas heater of claim 1 , wherein the resistive element is constructed as a wire, foil, laminate, printed ink, or wire mesh.

8 . The gas heater of claim 1 , wherein the tubular body is formed from UVC transparent quartz glass.

9 . The gas heater of claim 1 , further comprising a first sensing port for accommodating a first heat sensor adjacent the inlet port to measure an inlet gas temperature and a second sensing port for accommodating a second heat sensor adjacent the outlet port to measure an outlet gas temperature.

10 . The gas heater of claim 9 , wherein the first and second sensing ports are axially aligned with a longitudinal axis of the tubular body.

11 . The gas heater of claim 9 , wherein the first and second sensing ports extend perpendicular to a longitudinal axis of the tubular body.

12 . The gas heater of claim 1 , wherein the inlet and outlet ports extend perpendicular to a longitudinal axis of the tubular body.

13 . The gas heater of claim 1 , wherein electrical couplings are provided for connecting the resistive element to an electrical energy source.

14 . A surgical gas delivery system comprising:
a) a source of insufflation gas; b) a pressure regulator for receiving insufflation gas from the source; c) an insufflation manifold for receiving pressure regulated insufflation gas from the pressure regulator for delivery to one or more surgical access ports communicating with the gas delivery system; and d) a gas heater for heating the insufflation gas received by the insufflation manifold, wherein the gas heater includes:
i) an elongated tubular body defining an interior flow passage having an inlet port for receiving insufflation gas from the pressure regulator an outlet port for delivering heated insufflation gas into the insufflation manifold;
ii) a dielectric support positioned within the interior flow passage of the tubular body; and
iii) a resistive element operatively associated with the dielectric support for heating insufflation gas flowing through the tubular body from the inlet port to the outlet port.

15 . The gas delivery system of claim 14 , further comprising a gaseous sealing manifold for communicating with a gas sealed access port and wherein the outlet port of the gas heater communicates with the gaseous sealing manifold in parallel with the insufflation manifold.

16 . The gas delivery system of claim 14 , wherein the gas heater further includes a first sensing port accommodating a first heat sensor adjacent the inlet port to measure an inlet gas temperature and a second sensing port accommodating a second heat sensor adjacent the outlet port to measure an outlet gas temperature.

17 . The gas delivery system of claim 14 , wherein electrical couplings are provided for connecting the resistive element of the gas heater to an electrical energy source.

18 . The gas delivery system of claim 14 , wherein the dielectric support is an elongated support beam having a ribbed exterior surface and the resistive element is wrapped around the ribbed exterior surface of the support beam.

19 . The gas delivery system of claim 14 , wherein the dielectric support is an elongated support tube and the resistive element is partially wrapped around an exterior surface of the support tube and partially woven transversely through an interior bore of the support tube.

20 . The gas delivery system of claim 14 , wherein the tubular body is formed from UVC transparent quartz glass, the dielectric support is formed at least in part from a ceramic material, and the resistive element is formed from a nickel based alloy.

Assignees

• Conmed Corp

Inventors

• Koltz Jr Michael

Classifications

• A61L9/20

  Ultraviolet radiation · CPC title

• A61M16/0063

  Compressors · CPC title

• A61M2205/0211

  Ceramics · CPC title

• A61M2205/3341

  stabilising pressure or flow to avoid excessive variation · CPC title

• A61M16/209

  Relief valves · CPC title