Pain threshold gage and softness tester
First Claim
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1. Apparatus for measuring the softness of materials comprising:
- (a) a hollow gas-tight cylinder for confining a fixed amount of gas, said cylinder having a transparent wall,(b) a two-ended rod having a first end for pressing against the material and a second end being a piston adapted to slide in said cylinder to decrease the volume of the fixed amount of gas when said first end is pressed against the material,(c) indicia on the transparent wall of said cylinder for indicating the decrease in volume of the fixed amount of gas, and(d) a plate slidably mounted on said rod between said first and second ends outside of said cylinder, whereby said plate slides along said rod when said first end is pressed against the material and eventually contacts said cylinder to provide an indication of softness.
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Abstract
A device for determining a patient'"'"'s threshold of pain having a gas-tight member, such as a cylinder, for confining a fixed amount of gas and a two-ended member, such as a rod. A first end of the rod is pressed against the patient'"'"'s body to apply gradually increasing pressure, and a second end decreases the volume of the fixed amount of gas. Indicia are provided for indicating how much the volume of gas decreases. The device may also be modified to test materials for softness or firmness.
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Citations
6 Claims
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1. Apparatus for measuring the softness of materials comprising:
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(a) a hollow gas-tight cylinder for confining a fixed amount of gas, said cylinder having a transparent wall, (b) a two-ended rod having a first end for pressing against the material and a second end being a piston adapted to slide in said cylinder to decrease the volume of the fixed amount of gas when said first end is pressed against the material, (c) indicia on the transparent wall of said cylinder for indicating the decrease in volume of the fixed amount of gas, and (d) a plate slidably mounted on said rod between said first and second ends outside of said cylinder, whereby said plate slides along said rod when said first end is pressed against the material and eventually contacts said cylinder to provide an indication of softness.
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2. Apparatus for applying gradually increasing pressure against the body of a patient to determine pain threshold comprising:
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(a) a hollow gas-tight cylinder for confining a fixed amount of gas, said cylinder having a transparent wall, (b) a two-ended rod having a first end for pressing against the patient'"'"'s body to apply pressure and a second end being a piston adapted to slide in said cylinder to decrease the volume of the fixed amount of gas when said first end is pressed against the patient'"'"'s body, and (c) indicia on the transparent wall of said cylinder for indicating the decrease in volume of the fixed amount of gas. - View Dependent Claims (3, 4, 5, 6)
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Specification