Pressure measurement device comprising a motorized load sensor and a process for controlling the device
First Claim
1. Device for measuring the pressure of blood, intended to engage with a section (16) for measuring the pressure of blood flowing in a pipe (14), the pressure measurement section (16) comprising, in a substantially rigid wall (34), a hole (36) which is sealed by a closure element (38), the internal face (40) of which is in contact with the blood and the external face (42) of which is in contact with the ambient air, it being possible to elastically deform or displace the closure element (38) 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 device comprising a load sensor (26) secured to a support structure (20, 22) designed to support the pressure measurement section (16) in such a way that the load sensor (26) is placed substantially facing the closure element (38), along the deformation axis (A-A), the load sensor (26) being designed to be in contact, via the axial end of a sensitive member (52), with the external face (42) of the closure element (38) so as to measure the force applied axially to the internal face (40) of the closure element (38) by the blood pressure, in order to calculate therefrom the value of this pressure, characterized in that:
- in order to operate a measurement, the load sensor (26) co-operates with the external face (42) of the associated closure element (38) only by contact;
the device (10) comprises means (58) for the relative axial displacement of the sensitive member (52), or of the measurement section (16), with respect to the support structure (20, 22), towards the closure element (38);
the device (10) comprises a control system of the means (58) for the axial displacement of the sensitive member (52), or of the measurement section (16), such that, during an initial adjustment phase of the axial position of the sensitive member (52) with respect to the external face (42) of the associated closure element (38), the sensitive member (52) comes to contact with the external face (42) of the closure element (38) and applies a given initial pretensioning force (F0), in order to make the pressure measurement device (10) suitable for measurement of blood pressure greater than the ambient air pressure and for measurement of blood pressure less than the ambient air pressure.
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Accused Products
Abstract
The invention proposes a device for measuring the pressure of blood, intended to engage with a section (16) for measuring the pressure of blood, which section comprises a membrane (38) which is axially deformable under the effect of the blood pressure and which is designed to be mounted on a support structure (20, 22) bearing especially a load sensor (26) arranged substantially facing the membrane (38), characterized in that it comprises controlled means (58) for the relative axial displacement of the sensitive member (52) of the load sensor (26), with respect to the support structure (20, 22), so that the axial position of the sensitive member (52) can be adjusted with respect to the external face (42) of the membrane (38), especially for the purpose of carrying out an initial calibration operation.
The invention also proposes a process for controlling the device.
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Citations
17 Claims
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1. Device for measuring the pressure of blood, intended to engage with a section (16) for measuring the pressure of blood flowing in a pipe (14), the pressure measurement section (16) comprising, in a substantially rigid wall (34), a hole (36) which is sealed by a closure element (38), the internal face (40) of which is in contact with the blood and the external face (42) of which is in contact with the ambient air, it being possible to elastically deform or displace the closure element (38) 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 device comprising a load sensor (26) secured to a support structure (20, 22) designed to support the pressure measurement section (16) in such a way that the load sensor (26) is placed substantially facing the closure element (38), along the deformation axis (A-A), the load sensor (26) being designed to be in contact, via the axial end of a sensitive member (52), with the external face (42) of the closure element (38) so as to measure the force applied axially to the internal face (40) of the closure element (38) by the blood pressure, in order to calculate therefrom the value of this pressure, characterized in that:
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in order to operate a measurement, the load sensor (26) co-operates with the external face (42) of the associated closure element (38) only by contact;
the device (10) comprises means (58) for the relative axial displacement of the sensitive member (52), or of the measurement section (16), with respect to the support structure (20, 22), towards the closure element (38);
the device (10) comprises a control system of the means (58) for the axial displacement of the sensitive member (52), or of the measurement section (16), such that, during an initial adjustment phase of the axial position of the sensitive member (52) with respect to the external face (42) of the associated closure element (38), the sensitive member (52) comes to contact with the external face (42) of the closure element (38) and applies a given initial pretensioning force (F0), in order to make the pressure measurement device (10) suitable for measurement of blood pressure greater than the ambient air pressure and for measurement of blood pressure less than the ambient air pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17)
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12. Process for controlling a device (10) for measuring the pressure of blood, intended to engage with a section (16) for measuring the pressure of blood flowing in a pipe (14), the pressure measurement section (16) comprising, in a substantially rigid wall (34), a hole (36) which is sealed by a closure element (38), the internal face (40) of which is in contact with the blood and the external face (42) of which is in contact with the ambient air, it being possible to elastically deform or displace the closure element (38) 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 device comprising a load sensor (26) secured to a support structure (20, 22) designed to support the pressure measurement section (16) in such a way that the load sensor (26) is placed substantially facing the closure element (38), along the deformation axis (A-A), the load sensor (26) being designed to be in contact, via the axial end of a sensitive member (52), with the external face (42) of the closure element (38) so as to measure the force applied axially to the internal face (40) of the closure element (38) by the blood pressure, in order to calculate therefrom the value of this pressure,
characterized in that, during an initial adjustment phase of the axial position of the sensitive member (52) with respect to the external phase (42) of the associated closure element (38), the sensitive member (52), or the measurement section (16), is axially moved, with respect to the support structure (20, 22), towards the closure element (38), respectively towards the axial end of the sensitive member (52), such that the sensitive member (52) comes to contact with the external face (42) of the closure element (38) and applies a given initial pretensioning force (F0), in order to make the pressure measurement device (10) suitable to measurement of blood pressure greater than the ambient air pressure and to measurement of blood pressure less than the ambient air pressure.
Specification