| 摘要 |
An improved capsule ( 15 ) for sensing a contractual force within a mammalian tract, comprising a shell ( 16 ), a flexible sleeve ( 17 ) affixed to the shell and defining a chamber ( 19 ) between the shell and the sleeve, and a pressure sensor ( 18 ) operatively arranged to sense pressure within the chamber, whereby a contraction force on the outside of the sleeve produces a corresponding pressure change within the chamber. The chamber may contain a fluid ( 22 ) and the fluid may be mineral oil.
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