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Esophageal transducer

  • US 3,939,823 A
  • Filed: 01/28/1975
  • Issued: 02/24/1976
  • Est. Priority Date: 01/28/1975
  • Status: Expired due to Term
First Claim
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1. A pressure sensing device for measuring pressure circumferentially in internal body cavities comprising:

  • a catheter for introducing said pressure sensing device into the internal body cavities,a rigid cylindrical transducer housing connected to said catheter and defining an open cavity therein spaced along the length thereof, said housing having a distal end,pressure sensing means, mounted entirely within said housing and in pressure communication with said cavity, for generating an electrical signal in response to pressure in said cavity,means for sensing the pressure impinging on said transducer housing circumferentially comprising an annular flexible sleeve member contacting said housing coaxial therewith and surrounding said cavity,a liquid medium contained within said cavity and in contact with said flexible sleeve and said pressure sensing means for transferring pressure from the entire circumference of said flexible sleeve member to said pressure sensing means, electrical transmitting means connected to said pressure sensing means and passing through the distal end of said housing and passing through said catheter for transmitting said electrical signal to a receiver external to the body.

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