Patient cable sensor switch

Details Patient cable sensor switch Patient cable sensor switch

1998-03-19

1999-12-07

Donovan, Lincoln

Electrical connectors

With indicating or identifying provision

Connection indicating provision

29825, H01R 300

Patent

active

059973439

ABSTRACT:
A sensor switch located in a patient cable adapts an incompatible sensor to a monitor in a pulse oximetry system. The sensor switch is particularly suited to adapting sensors to a monitor that utilizes an open-circuit detector to determine a no-sensor condition. A compatible sensor short-circuits the inputs to the open-circuit detector to indicate sensor presence. An incompatible sensor has such no short-circuit feature and fails to work on such a monitor. An incompatible sensor attached to a sensor connector at one end of the patient cable, however, actuates the sensor switch. The sensor switch, in turn, short-circuits the open-circuit detector inputs when the monitor is attached to a monitor connector at the opposite end of the patient cable. Thus, the sensor switch simulates the presence of a compatible sensor to the monitor.

REFERENCES:
patent: 4287853 (1981-09-01), Vester et al.
patent: 4611601 (1986-09-01), Bowman
patent: 4684245 (1987-08-01), Goldring
patent: 5249576 (1993-10-01), Goldberger et al.
patent: 5387122 (1995-02-01), Goldberger et al.
patent: 5638944 (1997-06-01), Diebel et al.
patent: 5645440 (1997-07-01), Tobler et al.
patent: 5807247 (1998-09-01), Merchant et al.

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