Catheter with physiological sensor
First Claim
1. A pressure sensing device comprising:
- a pressure transducer; and
a pressure transmission catheter comprising;
an elongate structure formed to define an internal lumen extending from a distal sensing portion of the pressure transmission catheter to a proximal end of the pressure transmission catheter in fluid communication with the pressure transducer, wherein the pressure transmission catheter is constructed to provide no transfer of fluid between the internal lumen and space outside of the pressure sensing device;
a pressure-transmitting liquid contained within the internal lumen;
support structure formed to surround the internal lumen at the distal sensing portion to prevent collapse of the internal lumen by lateral pressure forces, the support structure further being formed to define a plurality of openings through the support structure, the plurality of openings comprising at least one opening that is laterally facing; and
diaphragm structure formed in relation to the support structure to provide a diaphragm portion for each of the support structure openings.
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Accused Products
Abstract
The disclosed embodiments present improved catheters with physiological sensors. In one embodiment, the catheter includes, generally, a pressure transducer/electronics assembly connected to a pressure transmission catheter. The pressure transmission catheter includes a hollow tube made from a low compliance material. The distal end of the hollow tube is filled with a gel-like material or plug which acts as a barrier between the catheter liquid and the target fluid. The hollow tube is partially filled with a low viscosity liquid and is in fluid communication with the gel-like material and the pressure transducer. The pressure of the target fluid is transmitted to the liquid in the hollow tube through the gel-like material and/or the wall of the distal tip and is fluidically transmitted to the pressure transducer. The pressure transmission catheter may be inserted into a vessel lumen or into a lumen of a therapeutic or diagnostic catheter for biomedical applications.
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Citations
32 Claims
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1. A pressure sensing device comprising:
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a pressure transducer; and a pressure transmission catheter comprising; an elongate structure formed to define an internal lumen extending from a distal sensing portion of the pressure transmission catheter to a proximal end of the pressure transmission catheter in fluid communication with the pressure transducer, wherein the pressure transmission catheter is constructed to provide no transfer of fluid between the internal lumen and space outside of the pressure sensing device; a pressure-transmitting liquid contained within the internal lumen; support structure formed to surround the internal lumen at the distal sensing portion to prevent collapse of the internal lumen by lateral pressure forces, the support structure further being formed to define a plurality of openings through the support structure, the plurality of openings comprising at least one opening that is laterally facing; and diaphragm structure formed in relation to the support structure to provide a diaphragm portion for each of the support structure openings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification