Ultra miniature pressure sensor
First Claim
Patent Images
1. A pressure sensor apparatus comprising:
- a guidewire;
a sensor housing having an external wall, a lumen, and a hole in the external wall extending from an external surface of the sensor housing to the lumen and being open to ambient fluid, the sensor housing disposed near a distal extremity of the guidewire;
a first coil disposed proximally from the sensor housing;
a second coil comprising a radiopaque material and disposed distally from the sensor housing; and
a solid state pressure sensor having a pressure sensitive region located at or near one end thereof, the solid state pressure sensor mounted within the sensor housing such that the pressure sensitive region projects into the lumen of the sensor housing without contacting the external wall of the sensor housing and such that a portion of the pressure sensitive region is disposed opposite the hole.
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Abstract
A method of measuring blood pressure and velocity proximally and distally of a stenosis in a vessel carrying blood includes the steps of providing a guide wire having both a pressure sensor and a velocity sensor disposed on a distal region of the guide wire, introducing the guide wire into the vessel, advancing the guide wire to position the pressure sensor and the velocity sensor proximally and distally of the stenosis, and measuring the blood pressure and velocity proximally and distally of the stenosis with the pressure sensor and the velocity sensor.
81 Citations
1 Claim
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1. A pressure sensor apparatus comprising:
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a guidewire;
a sensor housing having an external wall, a lumen, and a hole in the external wall extending from an external surface of the sensor housing to the lumen and being open to ambient fluid, the sensor housing disposed near a distal extremity of the guidewire;
a first coil disposed proximally from the sensor housing;
a second coil comprising a radiopaque material and disposed distally from the sensor housing; and
a solid state pressure sensor having a pressure sensitive region located at or near one end thereof, the solid state pressure sensor mounted within the sensor housing such that the pressure sensitive region projects into the lumen of the sensor housing without contacting the external wall of the sensor housing and such that a portion of the pressure sensitive region is disposed opposite the hole.
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Specification