Surgery – Truss – Pad
Patent
1986-07-02
1987-07-28
Cohen, Lee S.
Surgery
Truss
Pad
73579, G10N 338
Patent
active
046826084
ABSTRACT:
Apparatus for measuring the Young's modulus or the internal damping coefficient of skin, for example human skin, in vivo, comprises a rectangular frame of non-metallic material to be adhered by means of double-sided adhesive tape to the surface of skin to be tested, and a movable assembly also adherable to the skin surface by means of tape.
The frame carries a vibration exciter in the form of a coil co-operating with a magnetic bead on the movable means, and also an opto-electronic movement sensor comprising an optical transmitter and receiver mounted next to one another on the frame and an optical reflector on the movable means for reflecting back to the light receiver the beam emitted by the light transmitter.
The electronic circuit includes a frequency scanning low-frequency generator and means for recording the frequency and the vibration amplitude as measured by the sensor, to plot the amplitude against the frequency for determining the resonance frequency and other characteristics such as the width of the resonance peak at half-height.
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patent: 4177798 (1979-12-01), Leveque et al.
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patent: 4295374 (1981-10-01), Kusy
patent: 4297884 (1981-11-01), Leveque et al.
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Biological System Transfer-Function Extraction Using Swept-Frequency and Correlation Techniques, by W. Williams et al.; Med. & Biol. Eng., vol. 10, #5; pp. 609-619.
"In Vivo Determination of Mechanical Properties of the Human Ulna by Means of Mechanical Impedance Tests . . ." by G. Thompson et al., Med. & Biol. Eng., vol. 14, #3, pp. 253-262.
An Apparatus for Measuring the Recoil Characteristics of Human Skin in Vivo, by C. Gunner et al., Med. & Biol. Eng. & Comput., 1979, pp. 142-144.
De Rigal Jean P.
Leveque Jean-Luc M.
Losch Marie-Jeanne
Rasseneur Laurent B.
"L'Oreal"
Cohen Lee S.
Shay David
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