CATHETER WITH PRESSURE SENSOR
First Claim
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1. A pressure sensing catheter comprising:
- a catheter body having a first passage extending from near a proximal end of said catheter body to a location on said catheter body distal to said proximal end;
said first passage having a proximal end connectable to a pressure transducer;
a first mounting sleeve member disposed on said catheter body;
a second mounting sleeve member disposed on said catheter body;
a flaccid tube disposed over a portion of said catheter body to have longitudinal slack, said flaccid tube having a proximal end and a distal end forming an airtight connection;
an aperture located through said catheter body between said first passage and a space formed underneath said tube.
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Abstract
A pressure sensor assembly is disclosed which includes a flaccid tube having two mounting sleeve members that bond the tube to a distal end of a catheter. The catheter includes an aperture located beneath the tube and in communication with an air passage. As the pressure outside the tube changes, the tube moves relative to the catheter body, thereby communicating that pressure change to the sealed air passage within the catheter. This air passage is connected to an external transducer that can measure this pressure change and thereby determine a pressure at the distal end of the pressure catheter.
49 Citations
20 Claims
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1. A pressure sensing catheter comprising:
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a catheter body having a first passage extending from near a proximal end of said catheter body to a location on said catheter body distal to said proximal end;
said first passage having a proximal end connectable to a pressure transducer;a first mounting sleeve member disposed on said catheter body; a second mounting sleeve member disposed on said catheter body; a flaccid tube disposed over a portion of said catheter body to have longitudinal slack, said flaccid tube having a proximal end and a distal end forming an airtight connection; an aperture located through said catheter body between said first passage and a space formed underneath said tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A catheter for sensing pressure within a patient comprising:
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an elongated catheter body having a first passage extending from a proximal end of said catheter along a length of said catheter;
said first passage being connectable to an external pressure transducer;an aperture disposed near a distal end of said catheter body and passing from an outside of said catheter body to said first passage; a flaccid tube located over a portion of said catheter and said aperture;
a proximal and distal end of said flaccid tube sealingly bonded to said catheter body so as to form a variable volume chamber. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A catheter for sensing pressure within a patient comprising:
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an elongated catheter body having an air passage extending between a proximal end of said catheter body and a distal end of said catheter body; a proximal end of said air passage being connectable to an external pressure transducer; said catheter body having a reduced diameter region near said distal end of said catheter body; an aperture located through a portion of said catheter body so as to allow communication between said air passage and an environment outside of said catheter body; a flaccid tube bonded over said reduced diameter region and said aperture;
said flaccid tube being positioned to include longitudinal slack in said flaccid tube so as to allow deflection of said flaccid tube into and out of an area around said reduced diameter region. - View Dependent Claims (19, 20)
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Specification