Displacement sensor and medical apparatus

Details Displacement sensor and medical apparatus Displacement sensor and medical apparatus

1990-06-18

1991-12-03

Kamm, William E.

Surgery

Truss

Pad

324226, 3242072, A61B 508

Patent

active

050692216

ABSTRACT:
A displacement sensor which is battery operated and suitable for use as a respiratory monitor to detect the onset of apnoea in infants or post operative patients is disclosed. The sensing device is easily attached to the patient by an elasticated belt, together with associated monitoring electronics in which the sensor signal is compared with a floating reference level in a level detector which is connected through a NAND gate 3 to prevent a timer 4 timing out while respiration signals are present. Cessation of respiratory movement for greater than 10 or 20 seconds is indicated by both audible and visual alarms 14 and 15. In another embodiment the sensor can be used to detect eye movements in a patient. Medical monitoring apparatus is also provided, said apparatus including a heart rate monitoring means and/or respiration monitoring means.

REFERENCES:
patent: 3547106 (1970-12-01), Barnman
patent: 3558052 (1972-04-01), Alter
patent: 3911899 (1975-10-01), Hattes
patent: 4487074 (1984-12-01), Herden
patent: 4517514 (1985-05-01), Howell
patent: 4576179 (1986-03-01), Manus et al.
patent: 4627292 (1986-12-01), DeKrone
patent: 4691185 (1987-09-01), Leubier et al.

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