Resuscitation assistive timer

Details Resuscitation assistive timer Resuscitation assistive timer

1983-10-26

1985-01-01

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368 89, 34030915, 3403094, G04F 800

Patent

active

044914237

ABSTRACT:
A resuscitation-assistive timer is utilized to provide audio or visual signals which act as cues to aid pediatric and adult resuscitations by indicating timing for chest compression and respiratory effort in cardio-pulmonary resuscitation. Short audio and visual signals are utilized to indicate the compression period whereas an elongated audio and/or visual signal is used to indicate the period for respiratory effort. For infants a ratio of five compressions to each respiratory effort is utilized, with the respiratory effort taking approximately two times as long as the cardiac compression. In one embodiment short pulses to signal chest compression are provided by a one-shot multivibrator which is actuated by a series of counted-down pulses from a variable frequency oscillator which may be set in accordance with the age of the individual to whom resuscitation is applied. The counted-down signals may also be further counted down and utilized to actuate a second one-shot multivibrator for the production of an elongated pulse during which respiratory effort is applied to the patient.

REFERENCES:
patent: 1918041 (1933-07-01), Knapke
patent: 2810384 (1957-10-01), Bloxsom
patent: 3276147 (1966-10-01), Padellford
patent: 3358068 (1967-12-01), Campbell
patent: 3509899 (1970-05-01), Hewson
patent: 3802417 (1974-04-01), Lang
patent: 3889663 (1975-06-01), Fryer
patent: 4092788 (1978-06-01), Gowing
patent: 4193064 (1980-03-01), Snyder
patent: 4297999 (1981-11-01), Kitrell

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