Device for recording physiological pressures
First Claim
1. A device for recording physiological pressures, comprising an essentially threadlike guide (3) inserted into a catheter (4), and at least one sensor element (1) provided near the tip of the guide (3), said at least one sensor element (1) producing an electrical or optical signal representing the hydrostatic pressure prevailing at the sensor element,characterized in that the guide (3) and the catheter (4) have at least one sealing surface (5, 6;
- 15,
16) each which are brought into contact with each other and which open and shut-off the hydraulic communication between the sensor element (1) and its surrounding medium by means of axial or rotary motion of the guide (3) in relation to the catheter (4), whereby the sensor element (1), via the interior of the catheter (4), can be brought into pressure communication with a pressure generator (7) connected to a proximal end of the catheter (4), said pressure generator being arranged to generate and transmit known calibration pressures to the sensor element (1).
2 Assignments
0 Petitions
Accused Products
Abstract
A device for physiological pressure monitoring comprises a miniaturized pressure sensor element which is located near the tip of a guide, which in turn is inserted into a catheter. The guide and the catheter have sealing surfaces which can be brought into contact with each other by axial or rotary motion of the guide in relation to the catheter, whereby the sensor element becomes available for calibration from a pressure generator connected to the catheter.
72 Citations
20 Claims
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1. A device for recording physiological pressures, comprising an essentially threadlike guide (3) inserted into a catheter (4), and at least one sensor element (1) provided near the tip of the guide (3), said at least one sensor element (1) producing an electrical or optical signal representing the hydrostatic pressure prevailing at the sensor element,
characterized in that the guide (3) and the catheter (4) have at least one sealing surface (5, 6; - 15,
16) each which are brought into contact with each other and which open and shut-off the hydraulic communication between the sensor element (1) and its surrounding medium by means of axial or rotary motion of the guide (3) in relation to the catheter (4), whereby the sensor element (1), via the interior of the catheter (4), can be brought into pressure communication with a pressure generator (7) connected to a proximal end of the catheter (4), said pressure generator being arranged to generate and transmit known calibration pressures to the sensor element (1). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- 15,
Specification