OSYPKA PACE 203H, Инструкция по эксплуатации

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PACE 203H – Instructions for Use
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To deactivate Auto MTR, the softkey
labeled
Auto MTR
in the
Auto Menu
must be pressed again. This causes
both the check mark to disappear from
the corresponding check box and the
label
AUTO MTR
in the upper display.
The MTR setting menu appears showing
the actual value which provides the op-
portunity to input a new value manually
(see chapter 9.12.2).
9.9.4 Automatic Adjustment of
Sensitivity (Auto Sense)
9.9.4.1 How the Auto Sense Function
Works
The Auto Sense function automatically
adjusts the PACE 203H sensitivity to
maintain an approximate 3:1 sensing
safety margin, potentially reducing the
number of under/over-sensing episodes.
This feature may also reduce the need to
manually determine the sensitivity
threshold (see chapter 1.1).
The Auto Sense function is different from
the other automatic functions, in that the
automatic sensing value is not calculated
from another parameter. PACE 203H
adapts the sensing value continuously to
the patient’s intrinsic heart activity. For
this intrinsic activity, which is detected in
the sensing phase of the respective
channel, the amplitude is measured and
the sensitivity value of the pacemaker is
adapted to maintain the 3:1 sensing
safety margin.
Figure 5: The Auto Sense function in-
creases sensitivity
Figure 5 shows an example in which the
sensitivity is increased (i.e. sensitivity
value is decreased) to maintain an ap-
propriate safety margin when the EGM
amplitude drops.
Figure 6: The Auto Sense function de-
creases sensitivity
Figure 6 shows an example in which the
sensitivity is decreased (i.e. sensitivity
value is increased) when the EGM am-
plitude goes up. An appropriate safety
margin is kept without working with un-
necessarily high sensitivity, which may
promote noise detection.
0
2
4
6
8
10
12
-2
-4
-6
-8
-10
-12
mV
sensitivity
safety
margin
Increase Sensitivity until lower margin is exceeded
14
-14
0
2
4
6
8
10
12
-2
-4
-6
-8
-10
-12
mV
sensitivity
safety
margin
Decrease Sensitivity until upper margin is no more exceeded
14
-14