Patient ambulation motion detector with multiple switch motion d

Details Patient ambulation motion detector with multiple switch motion d Patient ambulation motion detector with multiple switch motion d

1991-04-12

1992-09-08

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340686, 128782, 200DIG2, G08B 2300

Patent

active

051462060

ABSTRACT:
A patient ambulation motion detector intended for attachment to a patient's body. The detector includes a motion sensor switch and a detachment detector switch which are mounted on a circuit board, the circuit board being in turn enclosed within an attachment casing which is attachable to a lateral surface of the patient's body. The motion sensor comprises three SPST mercury switches mounted to the circuit board and oriented so as to be responsive to declination of that portion of the patient's body to which the detector is attached and which declination is indicative of impending ambulation, but non-responsive to positions in which the posture of the patient is not indicative of impending ambulation. The detachment detector switch is a spring contact switch which is openable and closable by a plunger acting thereon and sensitive to detachment of the detector from the patient's body. The detector may be wired to a conventional switched nurse call system. When multiple mercury switches are employed, the switches are connected in series so as to prevent false alarms.

REFERENCES:
patent: 2713159 (1955-07-01), Morrison
patent: 4179692 (1979-12-01), Vance
patent: 4282412 (1981-08-01), Florin
patent: 4348562 (1982-09-01), Florin
patent: 4536755 (1985-08-01), Holzgang et al.
patent: 4583084 (1986-04-01), Henderson et al.
patent: 4633237 (1986-12-01), Tucknott et al.
patent: 4972177 (1990-11-01), Nolan

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