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Device for measuring pressure comprising a membrane moulded into a cassette

  • US 20020107468A1
  • Filed: 12/07/2001
  • Published: 08/08/2002
  • Est. Priority Date: 12/08/2000
  • Status: Active Grant
First Claim
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1. Device for measuring the pressure of blood in a pipe (44) of an extracorporeal blood circuit (42), comprising a pressure measurement section (46) having a substantially rigid wall (64) including a hole (66) which is sealed by a closure element (68), the internal face (70) of which is in contact with the blood and the external face (72) of which is in contact with the ambient air, it being possible for the closure element (68) to be elastically deformed or displaced overall along a deformation or displacement axis (A-A) which is substantially orthogonal to its general plane, under the effect of the blood pressure, the pressure measurement section (46) being designed to engage with a load sensor (56) so that a portion of the external face (72) of the closure element (68) is, in its rest state, in direct or indirect contact with a load sensor (56) which can measure the force applied axially on the internal face (70) of the closure element (68) by the blood pressure, in order to calculate therefrom the value of this pressure, characterized in that the closure element (68) is made in a single piece with the associated rigid wall (64) of the pressure measurement section (46).

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