Thermodilution catheter and method

Details Thermodilution catheter and method Thermodilution catheter and method

1977-09-14

1979-05-08

Cohen, Lee S.

Surgery

Truss

Pad

73204, A61B 502

Patent

active

041530489

ABSTRACT:
A new and improved pigtail type catheter and method particularly suited for the local thermodilution technique for determination of venous blood flow. The fluid injection aperture is disposed in the pigtail portion adjacent the most forward extending area thereof. A thermister is operably associated with the pigtail portion adjacent the distal end thereof intermediate the spaced apart side edges. A separate aperture may be conveniently included at the distal end of the pigtail portion to facilitate pressure readings of the venous flow. The new structural arrangement and method facilitate absolute thermal insulation between the fluid injected into the venous flow and the thermister, avoidance of contact between the thermister and vessel walls and a generally constant spacial relationship between the injection aperture and thermister.

REFERENCES:
patent: 3545428 (1970-12-01), Webster, Jr.
patent: 3726269 (1973-04-01), Webster, Jr.
patent: 4015593 (1977-04-01), Elings et al.

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