A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
326/12.5
A61B 5/00 (2006.01) A61B 5/03 (2006.01) A61M 5/172 (2006.01)
Patent
CA 1114451
ABSTRACT: In apparatus for the automatic infusion of labour-inducing drugs during childbirth, in which the dose rate is steadily increased until a particular level of contraction activity is detected and then held con- stant, this constant rate can result in over-stimulation of labour. The improvement comprises the inclusion of a dose rate control system in which the duration and period- icity of the labour contractions are detected in the form of a pulse train from which a signal is produced by integration, which signal is representative of the average value of the mark-space ratio of the pulse train. This average value is compared with a predetermined value and the dose rate is increased or decreased according to whether the average value is less or greater than the predetermined value.
306841
Pye (electronic Products) Limited
Van Steinburg C.e.
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