52
8.6
Explaining of t he recording procedure
t o pat ient
Explain t he recording procedure t o pat ient .
Being generally relaxed and pausing
breat hing at correct int ervals is im port ant
for recording of high- qualit y heart sounds.
Observe at least 5 m inut es of pat ient
rest ing t o ensure hem odynam ic balance
before doing CAD- scoring and blood
pressure readings.
The recording sequence is less t han t hree
m inut es long and divided int o a pre-
recording and 4 recording loops.
During each recording loop, t he pat ient
should pause his breat h for 8 seconds.
A sound will be heard when it is t im e t o
pause breat hing. The sound will be
dem onst rat ed t o t he pat ient before
st art ing.
I nst ruct pat ient t o relax respirat ion and do
belly breat hing inst ead of t horax breat hing.
Show belly breat hing by pat ient hand on
belly, including inhalat ion, exhalat ion and
nat ural breat hing pause aft er exhalat ion.
Pr oced ur e
St e p
Tim
e ( s)
Act ions
Rest ing
phase
> 300
Pat ient lies
in bed.
R
e
c
o
rd
in
g
p
h
a
s
e
Pre-
recording
30
+
30
Analy sing
recording
condit ions
Loop Nr. 1
Breat hing
18
No
recording
Breat hing
pause
8
Recording
Loop Nr. 2
Breat hing
18
No
recording
Breat hing
pause
8
Recording
Loop Nr.3
Breat hing
18
No
recording
Breat hing
pause
8
Recording
Loop Nr. 4
Breat hing
18
No
recording
Breat hing
pause
8
Recording
Result
phase
Post
recording
60-
120
Calculat ion
of CAD-
score
Approx .
Tot al t im e
524-
564
