Catheter-tip micromanometer utilizing single polarization optica

Details Catheter-tip micromanometer utilizing single polarization optica Catheter-tip micromanometer utilizing single polarization optica

1984-08-22

1986-06-10

Howell, Kyle L.

Surgery

Truss

Pad

128634, 128673, 73705, A61B 502, A61B 500

Patent

active

045937010

ABSTRACT:
A catheter-tip micromanometer includes a photoelastic element, with the photoelastic element changing light propagation constants of two axes perpendicular to each other in response to blood pressure level and direction to which blood pressure is applied. Light is propagated through the photoelastic element at a prescribed angle with regard to the two axes thereof perpendicular to each other by means of a single polarization optical fiber which maintains a plane of polarization whereby blood pressure is measured on the basis of a difference between propagation velocities in two axial directions obtained during the propagation.

REFERENCES:
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patent: 3249105 (1966-05-01), Polanyi
patent: 3267932 (1966-08-01), Valliere
patent: 3498286 (1970-03-01), Polanyi et al.
patent: 3686958 (1972-08-01), Porter et al.
patent: 3789667 (1974-02-01), Porter et al.
patent: 4201222 (1980-05-01), Haase
patent: 4210029 (1980-07-01), Porter
patent: 4487206 (1984-12-01), Aagard

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