发明名称 |
Apparatus for measuring facial swelling |
摘要 |
Apparatus for measuring a volume change for facial swelling of a person which may occur after surgical removal of wisdom teeth, including a bite fork engageable within the mouth of the person for providing a relatively fixed reference position for the facial swelling; a reciprocable feeler rod having a free end with a feeler wheel secured thereto and reciprocable in a first x-axis direction substantially normal to the facial swelling; a spring which biases the feeler wheel into contact with the facial swelling; a tracing device for moving the feeler wheel in a second y-axis direction substantially normal to the first direction to cause the feeler wheel to trace across the facial swelling in a plurality of parallel planes spaced apart by a predetermined distance in the z-axis direction; a first LVDT for producing a first signal in response to the reciprocable movement of the feeler wheel in the first direction; a second LVDT for producing a second signal in response to movement of the feeler wheel in the second direction; and a differential volume circuit for producing an output signal corresponding to the volume change in response to the first signal, the second signal and the predetermined distance. |
申请公布号 |
US4530367(A) |
申请公布日期 |
1985.07.23 |
申请号 |
US19830532736 |
申请日期 |
1983.09.15 |
申请人 |
N.J. INSTITUTE OF TECHNOLOGY;UNIVERSITY OF MEDICINE AND DENTISTRY |
发明人 |
DESJARDINS, PAUL J.;MENON, SATHISCHANDRAN;MILLES, MAANO;PAWEL, HANS E. |
分类号 |
A61B5/107;A61C19/04;(IPC1-7):A61B5/10 |
主分类号 |
A61B5/107 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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