Apparatus and methods for recording time intervals

Details Apparatus and methods for recording time intervals Apparatus and methods for recording time intervals

1979-02-14

1982-08-31

Pellegrino, Stephen C.

Surgery

Truss

Pad

346 33ME, A61B 504

Patent

active

043467180

ABSTRACT:
A time interval recorder stores the magnitude of time intervals between events, e.g. heartbeats, over a period. The data is stored as a sequence of pairs of numbers representing respectively the magnitude of a time interval and the number of successive occurrences of the same time interval. The recorder comprises a digital timer, a comparator, a counter and a digital store. The timer provides a digital indication of each successive time interval which is compared in the comparator with the immediately previous digital indication. If there is equality then the counter is incremented. If there is non-equality then the count is stored in the store together with the digital value of the previous time interval and the counter is then zeroed. The store may also store digital indicators of elapsed time in the same sequence of stored numbers.

REFERENCES:
patent: T926014 (1974-09-01), Bonner
patent: 4090505 (1978-05-01), Mortara
patent: 4096854 (1978-06-01), Perica et al.
Haisty, W. K. et al., "Discriminant Analysis of RR Intervals: An Algorithm for On-Line Arrythmia Diagnosis," Comp. and Biomed. Res., vol. 5, No. 3, pp. 247-255, Jun. 1972.

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