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US 8,857,264 B2Granted
Catheter die
AssigneeAmphenol Thermometrics, Inc.
InventorSisira Kankanam Gamage
Life of this patent
Estimating the term…
Abstract
A catheter die is provided and includes an elongate body having first and second opposing end portions and an end face at the first one of the first and second opposing end portions. The elongate body defines a cavity within the first end portion with an interior facing surface of the cavity disposed to extend alongside at least a portion of the first end face. At least one or more piezoresistive pressure sensors are operably disposed proximate to the cavity.
Claims23
A catheter die, comprising:
- an elongate body having a first end portion, a second end portion, and an end face at the first end portion, the elongate body defining a cavity completely enclosed within the first end portion with an interior facing surface of the cavity disposed to extend alongside at least a portion of the end face of the first end portion;
- and
- at least one or more piezoresistive pressure sensors operably disposed proximate to the cavity.
A catheter die, comprising:
- an elongate body having sidewalls, longitudinal first and second opposing end portions of the sidewalls and an end face at the longitudinal first end portion,
- the sidewalls having a longitudinal length that is larger than any planar dimension of the end face,
- the elongate body defining a cavity having an interior facing surface proximate to the end face such that a portion of the end face is defined as a diaphragm,
- the interior facing surface being disposed alongside at least a portion of the end face;
- and
- at least one or more piezoresistive pressure sensors operably disposed proximate to the diaphragm and the cavity.
3 more elements
A method of assembling a catheter die, comprising:
- forming an elongate body having a first end portion, a second end portion opposing the first end portion, and an end face at the first end portion, the elongate body having a longitudinal length that is larger than any planar dimension of the end face;
- defining a cavity completely enclosed within the first end portion such that an interior facing surface of the cavity is disposed alongside at least a portion of the end face;
- and
- operably disposing a piezoresistive pressure sensor proximate to the cavity.
1 more element
A method of detecting pressure, comprising:
- (a) providing a catheter die comprising:
- an elongate body having first and second opposing end portions and an end face at the first end portion, the elongate body defining a cavity within the first end portion with an interior facing surface of the cavity disposed to extend alongside at least a portion of the end face of the first end portion, wherein the interior facing surface is proximate to the end face such that a portion of the end face is defined as a diaphragm which deforms in accordance with a pressure differential between an interior of the cavity and an exterior of the cavity;
- and
- at least one or more piezoresistive pressure sensors operably disposed proximate to the cavity such that said at least one or more piezoelectric pressure sensors experience strain when the diaphragm deforms;
- (b) exposing the catheter die to the pressure to be measured to cause the diaphragm to deform in accordance with the pressure differential;
- and
- (c) detecting the pressure using the at least one or more piezoresistive pressure sensors.
4 more elements
Dependencies are inferred from the claim text.