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4
The following phases are recommended in the case of auscul-
tatory measurement
– adults: phase V (K5)
– children aged 3 to 12: phase IV (K4)
– pregnant women: phase V (K5), except when sounds are
audible when the cuff is deflated: in this case phase IV (K4)
Korotkoff sounds should be used.
– K5 is the point at which tones heard through the stethos-
cope are no longer audible
– K4 is the point at which tones heard through the stethos-
cope change from a clear sound to a muffled sound.
Inscriptions:
"mmHg" is the unit in which blood pressure is measured
"shock protected" = the instrument has been tested and found
to work correctly after being dropped from a height of up to
one metre.
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