Laryngoscope pressure sensor and alarm

Details Laryngoscope pressure sensor and alarm Laryngoscope pressure sensor and alarm

1994-11-23

1996-07-16

Hindenburg, Max

Surgery

Specula

Laryngoscope

600202, A61B 106

Patent

active

055362451

ABSTRACT:
A replaceable pressure sensing system for detecting undue pressure applied to a patient's teeth by a laryngoscope. The system includes a cushioned, elongated pressure sensor electrically connectable to a battery and an alarm, such as an audible or visible alarm. The sensor is of the type wherein pressure applied at any point along the length thereof activates the sensor. In one embodiment, the sensor is a linear membrane switch including first and second flexible, elongated strip members carrying conductive ribbons in spaced, face-to-face relation. In a second embodiment, a piezoelectric film is sandwiched between first and second flexible, elongated strip members. Pressure applied to the strip members activates the sensor which signals the alarm. The battery and the alarm may be carried by the flexible elongated members or the laryngoscope to which the sensor is adapted to be releasably attached. Another aspect of the invention includes an expandable member portion situated between the sensor attached to the laryngoscope flange and the alarm attached to the laryngoscope handle for use on a laryngoscope in the folded position.

REFERENCES:
patent: 3888117 (1975-06-01), Lewis
patent: 4263900 (1981-04-01), Nicholson
patent: 4295465 (1981-10-01), Racz et al.
patent: 4384570 (1983-05-01), Roberts
patent: 4426884 (1984-01-01), Polchaninoff
patent: 4488873 (1984-12-01), Bloomfield et al.
patent: 4791940 (1988-12-01), Hirschfeld et al.
patent: 4841987 (1989-06-01), Brown et al.
patent: 5070859 (1991-12-01), Waldvogel

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