Mechanical properties of the mammalian vas deferens. II. In the active state

S. K. Batra Department of Mechanical Engineering, M.I.T., the Northern Research Company, Cambridge; Argonne National Laboratory, and the Department of Civil Engineering, University of Massachusetts

C. W. Lau Department of Mechanical Engineering, M.I.T., the Northern Research Company, Cambridge; Argonne National Laboratory, and the Department of Civil Engineering, University of Massachusetts

I. P. Krepchin Department of Mechanical Engineering, M.I.T., the Northern Research Company, Cambridge; Argonne National Laboratory, and the Department of Civil Engineering, University of Massachusetts

W. J. Shack Department of Mechanical Engineering, M.I.T., the Northern Research Company, Cambridge; Argonne National Laboratory, and the Department of Civil Engineering, University of Massachusetts

T. J. Lardner Department of Mechanical Engineering, M.I.T., the Northern Research Company, Cambridge; Argonne National Laboratory, and the Department of Civil Engineering, University of Massachusetts

Abstract

The mechanical response of the vas induced by field stimulation is described in this paper. The experiments were performed, in vitro, on vasa from Sprague-Dawley albino rats. In the maintained ac tetanic stimulation, the active force achieves the peak magnitude in about 1 to 1.2 sec; thereafter, it relaxes gradually. For a given stimulus voltage (amplitude), a maximal response is elicited at 60 Hz. At 6000 Hz, and greater, no response is elicited. The ability to respond to stimulus dies out in 2 hr at 5°C above the normal temperature of 37°C; the ability to respond to stimulus remains unaffected at 5°C below the normal temperature. The active force is always larger than the passive force when the vas is subjected to titanic stimulation near its in situ length.

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Mechanical properties of the mammalian vas deferens. II. In the active state

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Mechanical properties of the mammalian vas deferens. II. In the active state

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