CPC A61B 17/442 (2013.01) [A61B 17/42 (2013.01); C05B 7/00 (2013.01); C05F 3/00 (2013.01); C05F 5/004 (2013.01); C05F 9/04 (2013.01); C05F 11/00 (2013.01); C05G 3/80 (2020.02); C09K 17/48 (2013.01); A61B 2017/00557 (2013.01); A61B 2017/445 (2013.01); A61B 2017/447 (2013.01)] | 1 Claim |
1. A method of using a pressure limitation apparatus configured to operate with a birth assistance device when attached via a conduit, the method comprising:
applying a positive pressure to thereby inflate an inflatable section of the birth assistance device, wherein the inflatable section is inflated by a pressure limited pump comprising a central chamber for receiving and containing a gas, a first check valve allowing air to pass therethrough and into the central chamber and preventing back flow of air out of the central chamber, a second check valve allowing air to pass therethrough and out of the central chamber and preventing back flow of air into the central chamber, the central chamber including a compressible portion having a compressible volume and an incompressible portion having an incompressible volume, wherein the compressible portion and the incompressible portion remain in fluid communication and wherein a ratio of the incompressible volume and the compressible volume defines a pressure of the air passing through the second check valve; and compressing the compressible portion of the central chamber such that air flows into the inflatable section of the birth assistance device.
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