Pressure relief arrangement for open surgery insufflation system

Patent metadata

Field	Value
Publication number	US-2019117911-A1
Application number	US-201816220911-A
Country	US
Kind code	A1
Filing date	Dec 14, 2018
Priority date	Oct 25, 2012
Publication date	Apr 25, 2019
Grant date	—

Abstract

A surgical humidification system includes a source of gas flow and a humidifier that receives the gas flow and outputs a humidified gas to a delivery conduit. The delivery conduit has an outlet and a suitable interface, such as a diffuser, is connected to the outlet. The interface can be positioned near or within an open surgical cavity of a patient to supply the humidified gas to the cavity. The system also includes a pressure relief arrangement that operates to relieve pressure from the system above a normal operating pressure. The pressure relief arrangement can be located in a non-sterile portion of the system, such as upstream from the humidifier, for example.

First claim

1 - 38 . (canceled)

39 . A surgical gas supply system, comprising:
a gas source for providing a flow of gas; and a pressure relief arrangement that is activated in response to a system pressure above a threshold pressure and that operates to reduce the system pressure when activated, the pressure relief arrangement comprising a valve and a shroud configured to at least partially enclose the valve.

40 . The surgical gas supply system of claim 39 , wherein the system is an open surgical insufflation system.

41 . The surgical gas supply system of claim 40 , wherein the flow of gas provided by the gas source is insufflation gas, and wherein the system further comprises a gas diffuser that dispenses the flow of insufflation gas to an open surgical cavity to create an insufflation gas environment in the open surgical cavity.

42 . The surgical gas supply system of claim 41 , wherein the pressure relief arrangement is located upstream of the gas diffuser and is positioned within a sterile portion of the system.

43 . The surgical gas supply system of claim 41 , wherein the pressure relief arrangement is located upstream of the gas diffuser and is positioned outside a sterile portion of the system.

44 . The surgical gas supply system of claim 41 , wherein the pressure relief arrangement is located between the gas source and the gas diffuser.

45 . The surgical gas supply system of claim 39 , further comprising a humidifier that receives the flow of gas from the gas source, wherein the humidifier warms and humidifies the flow of gas.

46 . The surgical gas supply system of claim 45 , further comprising a filter positioned between the gas source and the humidifier, wherein the filter is configured to filter gases prior to entry into the humidifier.

47 . The surgical gas supply system of claim 39 , wherein the valve of the pressure relief arrangement is a diaphragm valve.

48 . The surgical gas supply system of claim 39 , wherein the valve of the pressure relief arrangement is a leaflet valve.

49 . The surgical gas supply system of claim 39 , wherein the valve of the pressure relief arrangement is a ball and spring valve.

50 . The surgical gas supply system of claim 39 , wherein the threshold pressure is no greater than about 12 psi.

51 . The surgical gas supply system of claim 39 , wherein the threshold pressure is no greater than about 9.5 psi.

52 . The surgical gas supply system of claim 39 , wherein the threshold pressure is no greater than about 5 psi.

53 . The surgical gas supply system of claim 39 , wherein the threshold pressure is between about 2 psi and about 9.5 psi.

54 . The surgical gas supply system of claim 39 , wherein the threshold pressure is between about 3 psi and about 5 psi.

55 . The surgical gas supply system of claim 39 , wherein the gas source comprises a gas bottle and a flow meter.

56 . The surgical gas supply system of claim 39 , wherein the valve of the pressure relief arrangement vents to atmosphere.

57 . The surgical gas supply system of claim 39 , wherein the shroud is removable.

58 . The surgical gas supply system of claim 39 , wherein the shroud comprises an open ended cylindrical shape.

59 . The surgical gas supply system of claim 39 , wherein the gas supply system is used to provide gases during a surgical procedure or during a pre-operative procedure.

Assignees

• Fisher & Paykel Healthcare Ltd

Inventors

• Phillips Paul David
• Mcfedries Jonathan Stuart
• Hanley Colette Marie

Classifications

• A61M13/006

  with gas recirculation · CPC title

• A61M13/00

  Insufflators for therapeutic or disinfectant purposes {, i.e. devices for blowing a gas, powder or vapour into the body (hand-held units in which gas flow is produced by muscular energy at the moment of use B05B11/062)} · CPC title

• A61M2206/11

  Laminar flow · CPC title

• A61M16/107

  in the inspiratory path · CPC title

• A61M13/003 Primary

  Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing · CPC title