Device for measuring pressure comprising a membrane moulded into a cassette
First Claim
1. Device for measuring the pressure of blood in a pipe of an extracorporeal blood circuit, the device comprising:
- a pressure measurement section having a substantially rigid wall including a hole which is sealed by a closure element;
said closure element extending along a general plane, and having an internal face which is in contact with the blood, and an external face which is in contact with ambient air;
said closure element structured and arranged to be elastically deformed along a deformation axis which is substantially orthogonal to the general plane, under the effect of the blood pressure;
said pressure measurement section structured and arranged to engage with a load sensor so that a portion of the external face of the closure element is, in a rest state, in direct or indirect contact with the load sensor for measuring the force applied axially on the internal face of the closure element by the blood pressure, in order to calculate therefrom the value of said pressure; and
said closure element being made in a single piece with the associated rigid wall of the pressure measurement section.
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Accused Products
Abstract
The invention proposes a device for measuring the pressure of blood in a pipe (44) of an extracorporeal blood circuit (42) includes 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 overall along a deformation axis (A—A) under the effect of the blood pressure. 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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Citations
16 Claims
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1. Device for measuring the pressure of blood in a pipe of an extracorporeal blood circuit, the device comprising:
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a pressure measurement section having a substantially rigid wall including a hole which is sealed by a closure element;
said closure element extending along a general plane, and having an internal face which is in contact with the blood, and an external face which is in contact with ambient air;
said closure element structured and arranged to be elastically deformed along a deformation axis which is substantially orthogonal to the general plane, under the effect of the blood pressure;
said pressure measurement section structured and arranged to engage with a load sensor so that a portion of the external face of the closure element is, in a rest state, in direct or indirect contact with the load sensor for measuring the force applied axially on the internal face of the closure element by the blood pressure, in order to calculate therefrom the value of said pressure; and
said closure element being made in a single piece with the associated rigid wall of the pressure measurement section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification