Device for pressure measurements
DC CAFCFirst Claim
1. A guide wire assembly, comprisinga guide wire (2) having a distal end portion (16) and a proximal end, wherein a measuring device (14) is mounted in the distal end portion (16) of said guide wire (2);
- an interface cable (4) having a first end connectable to a control unit (8), and having a second end connectable (6) to the proximal end of said guide wire (2); and
information storing means (20;
22;
Rx) provided on said interface cable (4) and containing calibration-/temperature compensation data, uniquely characteristic of said measuring device (14), said data and an uncompensated output from said measuring device forming the input for calculation of a correct measurement value.
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Abstract
The invention relates to a guide wire assembly, having a guide wire (2) having a distal end portion (16) and a proximal end, wherein a measuring device (14) is mounted in the distal end portion (16) of the guide wire (2). It also has an interface cable (4) having a first end connectable to a control unit (8), and a second end connectable to the proximal end of the guide wire. Furthermore there is provided information storage (20; 22; Rx) on the interface cable, containing calibration/temperature compensation data, uniquely characteristic of the measuring device. The data and an uncompensated output from the measuring device forming the input for calculation of a correct measurement value.
247 Citations
21 Claims
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1. A guide wire assembly, comprising
a guide wire (2) having a distal end portion (16) and a proximal end, wherein a measuring device (14) is mounted in the distal end portion (16) of said guide wire (2); -
an interface cable (4) having a first end connectable to a control unit (8), and having a second end connectable (6) to the proximal end of said guide wire (2); and
information storing means (20;
22;
Rx) provided on said interface cable (4) and containing calibration-/temperature compensation data, uniquely characteristic of said measuring device (14), said data and an uncompensated output from said measuring device forming the input for calculation of a correct measurement value.- View Dependent Claims (2, 3, 4, 5, 6)
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7. A guide wire assembly, comprising
a guide wire (2) having a distal end portion (16) and a proximal end, wherein a measuring device (14) is mounted in the distal end portion of said guide wire; -
an interface cable (4) having a first end connectable to a control unit (8), and having a second end connectable (6) to the proximal end of said guide wire (2) by means of a suitable connector (6); and
a Wheatsone bridge comprising two half bridges, one half bridge located on said measuring device (14), the other located on a proximal side of said connector (6).
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8. A guide wire assembly for pressure measurements, comprising
a guide wire (2) having a distal end portion (16) and a proximal end; -
a pressure sensitive element (14) mounted in the distal end portion (16) of said guide wire (2);
an interface cable (4) having a first end connectable to a control unit (8), and having a second end connectable to a proximal end of said guide wire, by means of a connector (6) comprising mating male and female parts, said male part being provided on said guide wire, said female part being provided on said interface cable;
an electrical signal generating circuit comprising a pressure dependent part provided on said guide wire, and a pressure independent part provided on the proximal side of said connector, said pressure sensitive element forming part of said electrical signal generating circuit;
information storing means provided on said interface cable and containing calibration-/temperature compensation data, uniquely characteristic of said sensor element, said data and the uncompensated output from said electrical signal generating circuit means forming the input for calculation of a pressure value.
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9. A system for pressure measurements and coronary vessel dilatation, comprising
a guide wire (2) having a distal end portion (16) and a proximal end, wherein a pressure measuring device (14) is mounted in the distal end portion (16) of said guide wire (2); -
an interface cable (4) having a first end connectable to a control unit (8), and having a second end connectable (6) to the proximal end of said guide wire (2);
information storing means (20;
22;
Rx) provided on said interface cable (4) and containing calibration-/temperature compensation data, uniquely characteristic of said measuring device (14), said data and an uncompensated output from said measuring device forming the input for calculation of a correct measurement value;
a guide catheter for insertion in the arterial vessels and for guiding said guide wire to its desired location;
a balloon catheter for dilatation adapted to be passed over said guide wire and located at a desired location in said vessel.
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10. A guide wire assembly, comprising:
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a guide wire having a distal end and a proximal end, a sensor being mounted near the distal end of said guide wire;
a cable having an end connectable to the proximal end of said guide wire; and
an electronic device provided on said cable for compensating said sensor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification