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US 4,941,473 AGranted
Guide for mechanical guiding of a catheter in connection with cardio and vascular examination
AssigneeRadisensor AB
InventorsLars Tenerz, Bertil Hook, Thomas Engstrom
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Abstract
A guidewire for guiding a catheter is provided including a pressure sensor at the distal end of the guidewire and a ventilation passage for connecting the pressure sensor to ambient pressure.
Claims26
A guide wire having a distal end and proximal end for mechanically guiding a medical probe, comprising:
- (a) a miniaturized pressure sensor disposed at the distal end of the guide wire;
- (b) an air ventilation passage connecting the pressure sensor to a source of reference pressure;
- (c) a sheath formed of at least a first part adjacent the proximal end and a second part adjacent the pressure sensor, the sheath determining the torsional stiffness of the guide wire;
- (d) the first part being substantially inflexible and the second part being more flexible.
1 more element
Dependencies are inferred from the claim text.