| 摘要 |
An apparatus and method to determine the sharpness of a curved surgical needle point by a measurement of the perpendicular forces required to push the needle point through a supported membrane at a given rate of penetration. The apparatus includes a needle penetration fixture having a needle penetrable membrane, a load cell, and related control and recordation instrumentation. According to the method a needle is mounted on a rotatable fixture and first precisely aligned. Thereafter, the fixture is rotated so as to cause the needle to penetrate the membrane whereby the force necessary to penetrate the membrane force being recorded by recordation instrumentation and the process being controlled by control instrumentation.
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