Catheter die
First Claim
Patent Images
1. 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.
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Accused Products
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.
48 Citations
23 Claims
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1. A catheter die, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 21)
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9. A catheter die, comprising:
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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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of assembling a catheter die, comprising:
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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. - View Dependent Claims (19, 20, 22)
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23. A method of detecting pressure, comprising:
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(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.
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Specification