Sensing catheter system and method of fabrication
First Claim
Patent Images
1. A method of fabricating a sensing catheter assembly, comprising:
- forming a catheter body having a circumferential wall and defining first and second lumens, placing first and second electrical leads in the second lumen by co-extruding the first and second electrical leads and the catheter body;
forming an opening in the circumferential wall to expose the first and second electrical leads;
providing a microminiature sensor module comprising a substrate, a microminiature sensor disposed on the substrate, a signal conditioning circuit disposed on the substrate and in electrical communication with the sensor, and first and second electrical contacts in electrical communication with the sensor and circuit;
disposing the sensor module in the opening and adjacent the first and second electrical leads;
placing the first and second electrical contacts in electrical communication with the first and second electrical leads; and
sealing the opening.
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Abstract
A microminiature sensing module and a sensing catheter system are provided. The module includes a sensor and signal conditioning circuit mounted on a substrate having electrical contacts positioned to facilitate connection of the module to an electrical bus, such as a dual lead electrical bus. The catheter system incorporates a dual lead electrical bus and one or more sensor modules. Methods of fabricating sensing catheter systems are also provided.
60 Citations
25 Claims
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1. A method of fabricating a sensing catheter assembly, comprising:
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forming a catheter body having a circumferential wall and defining first and second lumens, placing first and second electrical leads in the second lumen by co-extruding the first and second electrical leads and the catheter body;
forming an opening in the circumferential wall to expose the first and second electrical leads;
providing a microminiature sensor module comprising a substrate, a microminiature sensor disposed on the substrate, a signal conditioning circuit disposed on the substrate and in electrical communication with the sensor, and first and second electrical contacts in electrical communication with the sensor and circuit;
disposing the sensor module in the opening and adjacent the first and second electrical leads;
placing the first and second electrical contacts in electrical communication with the first and second electrical leads; and
sealing the opening. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A sensing catheter system comprising:
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a catheter body having a circumferential wall and defining first and second lumens, the circumferential wall defining at least one opening to the second lumen;
first and second electrical leads disposed in the second lumen;
a microminiature sensor module disposed in the opening in the circumferential wall and adjacent the first and second electrical leads, the sensor module comprising a substrate, a microminiature sensor and a signal conditioning circuit disposed on the substrate, and first and second electrical contacts in electrical communication with the sensor and circuit;
first and second electrical connections between the first and second electrical leads and the first and second electrical contacts;
sealant disposed over the sensor module and filling the opening in the circumferential wall; and
a second sealant disposed over the sealant. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
wherein a microminiature sensor module is disposed in each of the plurality of openings.
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10. The sensing catheter system of claim 8, wherein the sensor module is disposed between the first and second electrical leads.
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11. The sensing catheter system of claim 10, further comprising a retaining member disposed in the second lumen and engaged with the first and second electrical leads to form the first and second electrical connections as electrical compression bonds.
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12. The sensing catheter system of claim 11, wherein the retaining member comprises a u-shaped clip.
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13. The sensing catheter system of claim 8, wherein the substrate defines a body region and two opposing arms;
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wherein each electrical contact is disposed at an end of an arm away from the body region of the substrate.
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14. The sensing catheter system of claim 8, wherein the first and second electrical leads comprise ribbons.
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15. The sensing catheter system of claim 8, wherein the first and second electrical leads comprise wires.
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16. The sensing catheter system of claim 15, wherein the wires are shielded wires.
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17. A sensing catheter system, comprising:
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a catheter body having a circumferential wall and defining first and second lumens, the circumferential wall defining at least one opening to the second lumen, the second lumen including a main channel portion and first and second sub-channel portions;
first and second electrical leads disposed in the second lumen;
a microminiature sensor module disposed in the opening in the circumferential wall and adjacent the first and second electrical leads, the sensor module comprising a substrate, a microminiature sensor and a signal conditioning circuit disposed on the substrate, and first and second electrical contacts in electrical communication with the sensor and circuit;
first and second electrical connections between the first and second electrical leads and the first and second electrical contacts; and
sealant disposed over the sensor module and filling the opening in the circumferential wall. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A sensing catheter system, comprising:
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a catheter body having a circumferential wall and defining a first lumen and a second lumen having first and second shoulder regions, the circumferential wall defining at least one opening to the second lumen;
first and second electrical leads disposed in the second lumen;
a microminiature sensor module disposed in the opening in the circumferential wall and adjacent the first and second electrical leads, the, sensor module comprising a substrate, a microminiature sensor and a signal conditioning circuit disposed on the substrate, and first and second electrical contacts in electrical communication with the sensor and circuit;
a u-shaped retaining member disposed in the second lumen and engaged with the first and second electrical leads to place the first and second electrical leads in electrical communication with the first and second electrical contacts; and
sealant disposed over the sensor module, extending into the first and second shoulder regions, and filling the opening in the circumferential wall.
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Specification