Catheter tip pressure transducer

Details Catheter tip pressure transducer Catheter tip pressure transducer

1978-12-08

1981-06-23

Michell, Robert W.

Surgery

Truss

Pad

73726, A61B 502

Patent

active

042744237

ABSTRACT:
A catheter tip pressure transducer for detecting the pressure in various portions of a living body accurately and safely comprises a pressure sensor disposed within the end portion of a catheter. The pressure sensor comprises a pressure sensitive diaphragm whereon strain gauges are formed by a diffusion method. The pressure sensor is mounted on an insulated supporting member without being secured firmly thereto. A protecting member made of silicone rubber fills the hollow portion of the catheter so as to isolate and protect the pressure sensor and the ambient body tissue.
Pressure is accurately measured by the pressure sensor without being influenced by the thermal stresses which occur in the supporting member. Furthermore, electrical isolation and mechanical safety are obtained.

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patent: 3277718 (1966-10-01), Ruge
patent: 3315201 (1967-04-01), Werme
patent: 3417361 (1968-12-01), Heller et al.
patent: 3480003 (1969-11-01), Crites
patent: 3550583 (1970-12-01), Chiku et al.
patent: 3553625 (1971-01-01), Stedman
patent: 3710781 (1973-01-01), Hutchins et al.
patent: 3724274 (1973-04-01), Millar
patent: 3946724 (1976-03-01), LaBalme
patent: 4023562 (1977-05-01), Hynecek et al.
Traite, M. et al., "Intra-Cardiac Catheter Tip Piezo-resistive Pressure Gauge", The Review of Sci. Instr., vol. 31, No. 9, pp. 987-991.
Samaun et al., "An IC Piezo-resistive Pressure Sensor for Biomed Instrumentation", IEE BME Trans., vol. 20, No. 2, Mar. 1973, PP. 101-109.
Millar H. D. et al., "A Stable Ultraminiature Catheter-Tip Pressure Transducer", Med. & Biol. Engr., Jan. 1973, pp. 86-89.
Ko W. H. et al., "Implantable Pressure Transducer for Biomed. Appl.", Proc. Election Components Conf., 1977, vol. 27, pp. 96-99.

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