Catheter having pressure detecting ability
First Claim
1. A catheter having a sensor for detecting forces acting on the distal end of the catheter, the catheter comprising:
- a catheter tube;
a chamber defined in said catheter tube;
a sensor having first and second surfaces, accommodated in said chamber;
a first pressure transmitting means for transmitting the forces acting on the distal end of the catheter to the first surface of the sensor;
a second pressure transmitting means for transmitting forces acting on a peripheral portion of the catheter tube to the second surface of the sensor; and
said sensor issuing signals in accordance with the forces transmitted to said first and second surfaces, respectively.
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Accused Products
Abstract
A catheter having a sensor for detecting forces acting on its distal end includes a catheter tube, a chamber defined in the catheter tube. The chamber is filled with silicon gel. The catheter also has a sensor chip and a cap. The sensor has a pressure sensing surface and a backside. The cap transmits the forces acting on the distal end of the catheter tube to the pressure sensing surface of the sensor chip. Further, the catheter has a pressure introducing hole. The pressure introducing hole transmits the forces acting on the periphery of the catheter tube to the backside of the sensor chip. The sensor chip issues signals externally in accordance with the pressures transmitted to its pressure sensing surface and its backside.
141 Citations
17 Claims
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1. A catheter having a sensor for detecting forces acting on the distal end of the catheter, the catheter comprising:
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a catheter tube; a chamber defined in said catheter tube; a sensor having first and second surfaces, accommodated in said chamber; a first pressure transmitting means for transmitting the forces acting on the distal end of the catheter to the first surface of the sensor; a second pressure transmitting means for transmitting forces acting on a peripheral portion of the catheter tube to the second surface of the sensor; and said sensor issuing signals in accordance with the forces transmitted to said first and second surfaces, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A catheter having a sensor for detecting forces applied to the distal end of the catheter, the catheter comprising:
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a catheter tube; a chamber defined in said catheter tube; first and second sensors accommodated in said chamber; a first pressure transmitting means for transmitting the forces acting on the distal end of the catheter to said first sensor; a second pressure transmitting means for transmitting the forces acting on a peripheral portion of the catheter tube to said second sensor; and said first and second sensors issuing signals in accordance with the forces transmitted thereto, respectively. - View Dependent Claims (16)
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17. A catheter having a distal end for insertion into a living body containing fluid, the catheter comprising:
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a catheter tube; a chamber defined in the catheter tube; a sensor means for detecting forces applied to the distal end, wherein the sensor means is located in the chamber; a first force transmitting means for transmitting forces applied to the tip of the distal end of the catheter to the sensor means, the forces including forces resulting from fluid pressure applied to the tip and forces resulting from contact between the tip and objects within the body; a second force transmitting means for transmitting forces acting on a peripheral portion of the distal end to the sensor means, wherein the peripheral portion is located such that it is not exposed to contact with objects within the body located distally of the tip of the distal end, and wherein the peripheral portion is exposed to forces resulting from fluid pressure; wherein the sensor means issues at least a signal representative only of contact forces applied to the tip of the distal end.
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Specification