Disposable calibration boot for multi-point calibration in fiber

Details Disposable calibration boot for multi-point calibration in fiber Disposable calibration boot for multi-point calibration in fiber

1993-08-13

1994-11-22

Sykes, Angela D.

Surgery

Truss

Pad

356243, 356 41, A61B 500

Patent

active

053659252

ABSTRACT:
A calibration boot for use with an optical catheter includes a plurality of materials, each having a different reflectivity characteristic with respect to known wavelengths of light. The boot is positioned over the distal end of the optical catheter and light is emitted from the distal end of the optical catheter into one of the materials at a time. At each emission, the reflected or backscattered light is measured by a detector and a plurality of signals are obtained. The plurality of readings are used to calibrate the overall optical catheter and system. The use of a plurality of calibration signals improves the overall system accuracy, particularly where two or more variables are present in the measured parameter. In the preferred system, the parameter being sensed in the oxygenatin of blood invasively.

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patent: 4650327 (1987-03-01), Ogi
patent: 4744656 (1988-05-01), Moran et al.
patent: 4796633 (1989-01-01), Zwirkoski
patent: 4823167 (1989-04-01), Manska et al.
patent: 4981355 (1991-01-01), Higgins

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