boso BS 90 Mode D'emploi page 12

7.) Slide the open cuff over your upper arm until the
lower cuff edge is ca. 2 – 3 cm away from the el-
bow. The rubber tubes should extend down form
the cuff. The special care that the membrane in
cuff is positioned directly over the pulse located
earlier. The more precise you position the mem-
brane the clearer and louder you will be able to
hear thesounds of the artery.
8.) relax as much as possible and keep silent while
his/her blood pressure is being measured
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9.) be calm for 5 minutes before the first reading
The following phases are recommended in the case of
auscultatory measurement
– adults: phase V (K5)
– children aged 3 to 12: phase IV (K4)
– pregnant women: phase V (K5), except when so-
unds 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 ste-
thoscope are no longer audible
K4 is the point at which tones heard through the ste-
thoscope 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.