Radi Medical Systems Ab

Ola Hammarstr&ouml;m

Lars Tenerz

Leif Smith

Per Benkowski

P&auml;r Von Malmborg

A sensor and guide wire assembly includes a core wire having a distal end, a proximal end, and a plurality of sections of different cross sections and thereby different flexibilities. At least one of the core wire sections has an enlarged portion with a sensor receptacle therein. The assembly also includes a tube that encloses the core wire over at least a fraction of its length such that the core wire extends out from a distal end of the tube. The tube is configured to enable the sensor and guide wire assembly to be inserted into an artery and to be passed to a measurement site inside a patient's body. The assembly further includes a sensor mounted in the sensor receptacle of the enlarged portion of the core wire. A first coil is arranged to enclose a first portion of the core wire extending out from the distal end of the tube, and the first coil is located nearer to the proximal end of the core wire than the sensor. A second coil is arranged to enclose a second portion of the core wire extending out from the distal end of the tube. The second coil is located nearer to the distal end of the core wire than the sensor.

Sensor and guide wire assembly

The invention relates to a sensor/guide wire device for biological pressure measurements having a guide wire (,) having a distal and a proximal end, and a pressure sensor device (,) mounted at the distal end of the guide wire. The distal portion can be a solid wire member (,) surrounded by a spiral member (,), and the sensor (,) can be an electrical sensor of a piezoresistive type. The sensor (,) is mounted on the solid wire (,). The sensor is mounted in a cantilevering fashion such that a pressure sensitive end of the sensor does not contact any structure other than its mount. This prevents forces (bending artifacts) from being exerted on the sensor, which could otherwise interfere with pressure measurements.

Growing community of inventors

Lerdala, Sweden

Ola Hammarström

Growing community of inventors

Lerdala, Sweden

Ola Hammarstr&ouml;m

Ola Hammarström