Catheter tip fluorescence-quenching fiber optic pressure sensor

Details Catheter tip fluorescence-quenching fiber optic pressure sensor Catheter tip fluorescence-quenching fiber optic pressure sensor

1991-03-11

1992-08-25

Hannaher, Constantine

Radiant energy

Luminophor irradiation

25022723, G01N 2164

Patent

active

051421550

ABSTRACT:
A fiber optic pressure sensor suitable for use in measuring, for example, arterial blood pressure, is taught. A catheter tip is formed utilizing the phenomena of collision quenching or Foerster energy transfer quenching of fluorescence in order to measure the pressure exerted by the medium in which the sensors are placed. When utilizing a collision-quenching type of sensor, the change in concentration of a quencher is measured, the quencher being enclosed in the sensor tip, which is in hydrodynamic equilibrium with its ambient environment. Foerster-quenching type sensors measure the change in distance between the quencher and the fluorophore, which in turn are caused by pressure changes caused by the ambient environment in which the sensor is placed.

REFERENCES:
patent: 4476870 (1984-10-01), Peterson et al.
patent: 4994396 (1991-02-01), Lefkowitz et al.

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