Device and method for chronic in-vivo measurement of internal body pressure
First Claim
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1. An inplantable device for sensing an internal body pressure of an animal, the device comprising:
- implantable catheter means having proximal and distal ends, the distal end for placement at a position within the animal at which the internal body pressure is to be sensed;
implantable pressure sensing means connected to the proximal end of the catheter means for providing a signal which is a function of the internal body pressure;
implantable osmotic infusion pump means connected to the proximal end of the catheter means for supplying doses of an antithrombogenic solution to the distal end; and
means associated with the osmotic infusion pump means for preventing body fluid from entering the distal end of the catheter means.
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Abstract
A device capable of sensing pressure allows the sensor and amplifying electronics to be packaged in a very small size and implanted within the body. The sensor consists of a small catheter, the tip of which is placed at the point at which pressure is to be measured, attached to a solid-state pressure sensor. The catheter is filled with a fluid and is connected to an implantable infusion pump which dispenses through the lumen of the catheter, heparin or other drug which inhibits thrombogenisis.
234 Citations
11 Claims
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1. An inplantable device for sensing an internal body pressure of an animal, the device comprising:
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implantable catheter means having proximal and distal ends, the distal end for placement at a position within the animal at which the internal body pressure is to be sensed; implantable pressure sensing means connected to the proximal end of the catheter means for providing a signal which is a function of the internal body pressure; implantable osmotic infusion pump means connected to the proximal end of the catheter means for supplying doses of an antithrombogenic solution to the distal end; and means associated with the osmotic infusion pump means for preventing body fluid from entering the distal end of the catheter means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of sensing an internal body pressure within a body of an animal, the method comprising:
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implanting within the body of the animal a sensing catheter with a distal end of the sensing catheter positioned to be exposed to the internal body pressure; implanting a pressure transducer within the body with a proximal end of the sensing catheter for providing a transducer signal as a function of fluid pressure at the proximal end; implanting an osmotic infusion pump within the body and connected to the proximal end of the sensing catheter for supplying doses of an antithrombogenic solution through the sensing catheter to the distal end; implanting a transmitter within the body and connected to the pressure transducer for transmitting a transmitter signal out of the animal which is a function of the transducer signal; and monitoring the transmitter signal over an extended time period to provide a record of variation of the internal body pressure over time. - View Dependent Claims (10, 11)
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Specification