Pressure safety device for bag valve mask

Abstract

A pressure safety device is used with a bag valve mask (BVM) for preventing over-pressurization. The BVM includes a bag assembly having a bag connector for detachably mating to a mask connector on a patient mask. The pressure safety device has a housing with a bag port, a mask fitting, and a flow path from the bag port to the mask fitting. The bag port detachably connects to the bag connector on the BVM, and the mask fitting detachably connects to the mask connector on the BVM. The pressure safety device includes an automatic flow reduction valve located on the flow path in the housing and impedes flow when pressure on a bag connector side of the valve exceeds a maximum threshold value.

Description

[0001] cross reference [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 679,301, filed June 1, 2018, which is incorporated herein by reference. Background technique [0003] 1. field of invention . The present invention generally relates to medical devices and methods. More specifically, the present invention relates to the field of breathing gas delivery using manual resuscitators. [0004] Bag valve mask (BVM) resuscitators have long been used to artificially ventilate patients who cannot breathe spontaneously, such as those in cardiac arrest, in respiratory distress, under anesthesia, and the like. A conventional BVM has a compression bag that the user manually compresses to pressurize and deliver breathing gas to the patient through a breathing mask worn over the patient's mouth and nose. [0005] Poor manual techniques using BVM can cause problems. Specifically, overpressurization of the compression bag can increase the pressure a...

AI Technical Summary

Problems solved by technology

[0005] Poor manual techniques using BVM can cause problems

Specifically, overpressurization of the compression bag can increase the pressure and flow rate of the breathing gas beyond optimal levels and in the worst case may injure the patient and in some cases may compromise safe levels such as causing air into the stomach

Although some solutions have been proposed, such as placing a pressure relief valve in the flow path between the compression bag and the breathing mask, the final ventilation is not always effective and there is no tactile or other feedback to the user to alert them Need to ease the pressure they put on

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