Patent ID: 7998114

Claim:
An apparatus for regulating pressure applied during a medical procedure, comprising: a cylindrical, inelastic housing enclosing an inner volume, the cylindrical housing having a first and second end at first and second ends of a cylinder forming said cylindrical housing, and a plunger for applying pressure to the inner volume, said plunger being slidably disposed within said cylindrical inelastic housing; an aperture in the housing for conveying pressure from the housing during the medical procedure; and a pressure-operated valve coupled between the inner volume of the housing and a space outside of the inner volume of the housing, in fluid communication with the inner volume of the housing for allowing pressure to escape from the inner volume of the housing through the valve when pressure in the housing exceeds a threshold; and a selector member mechanically and movably connected as part of said apparatus; whereby fluid pressure in the inner housing actuates the valve to release pressure from within the inner volume of the housing, wherein the pressure-operated valve is provided with discrete threshold setting features, said discrete threshold setting features being manually selectable by a user manually contacting said selector member and moving said selector member to one of a plurality of preset positions corresponding to said discrete threshold setting features, respectively, to perform manual selection of a discrete, pre-set threshold pressure level from a plurality of different discrete pre-set threshold pressure levels; and wherein threshold pressure levels intermediate of two of any of said discrete, pre-set threshold pressure levels cannot be selected.