Catheter and sensor having pressure detecting function
First Claim
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1. A physical characteristic sensor used for detecting obstacles existing in a blood vessel and for detecting blood pressure, comprising:
- a hollow elongated support member, the support member having a longitudinal axis;
a first sensing portion for detecting the obstacles;
a second sensing portion for detecting the blood pressure, each said sensing portion extending in the longitudinal direction of the support member;
said second sensing portion detecting blood pressure independently on said first sensing portion detecting obstacles and,a transmitting means for transmitting a physical quantity representative of at least one of the physical characteristics to each sensing portion, wherein the physical quantity acts on each sensing portion through said transmitting means in a direction that is generally perpendicular to the longitudinal axis.
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Abstract
A catheter includes a longitudinally extending catheter tube to be inserted into a body. A plurality of sensing portions are arranged in the catheter tube for detecting at least two types of pressures acting on the catheter when inserted into the body. Each sensing portion is arranged along the longitudinal direction of the catheter tube. A silicone gel transmits the two types of pressures acting in the body to each sensing portion. The two types of pressures act on each sensing portion in a radial direction of the catheter tube by way of the silicone gel.
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Citations
15 Claims
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1. A physical characteristic sensor used for detecting obstacles existing in a blood vessel and for detecting blood pressure, comprising:
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a hollow elongated support member, the support member having a longitudinal axis; a first sensing portion for detecting the obstacles; a second sensing portion for detecting the blood pressure, each said sensing portion extending in the longitudinal direction of the support member;
said second sensing portion detecting blood pressure independently on said first sensing portion detecting obstacles and,a transmitting means for transmitting a physical quantity representative of at least one of the physical characteristics to each sensing portion, wherein the physical quantity acts on each sensing portion through said transmitting means in a direction that is generally perpendicular to the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A catheter used for detecting obstacles existing in a blood vessel and for detecting blood pressure, comprising:
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elongated catheter tube for insertion into a body, the tube having a longitudinal axis; a plurality of sensing portions arranged in the catheter tube to detect at least two physical characteristics acting on the catheter tube during insertion into the body, said plurality of sensing portions including a first sensing portion for detecting the obstacles and a second sensing portion for detecting the blood pressure, each sensing portion being arranged to extend in the longitudinal direction of the catheter tube;
said second sensing portion detecting blood pressure independently on said first sensing portion detecting obstacles anda transmitting means for transmitting a pressure representing one of the two physical characteristics to each sensing portion, wherein the pressure acts through the transmitting means on each sensing portion in a direction that is perpendicular to the longitudinal axis of the catheter tube. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification