
Part /Material
Basic unit
Polyethylene
Instrument part
ABS plastic
Skull
PVC, hard
Chest skin
PVC, soft
Face piece
PVC, soft
Head bag, disposable
Polyethylene
T-shirt 100%
cotton
Tracksuit
50% cotton and 50% polyester
Carrying bag/training mat
PVC coated nylon material
3. Operating principles - see
Q
When air is blown through the mouth or nose of the face piece (1.1),
the head bag (1.2) fills, thereby displacing the air in the skull (1.3)
through the valve (1.4), which opens if the head is hyperextended or if
jaw thrust is being carried out.
The ambient air (not the trainee's air) then passes through the neck
tube (1.5) down into the lung bag (1.6) which expands and elevates
the chest (1.7) via the spring (1.11).
If insufflation takes place too quickly and/or the air volume is too high,
the stomach valve (1.8) will open suddenly and allow air to flow into
the stomach bag (1.9), thereby distending the stomach region (1.10).
The movements of both lung bag and stomach bag are transmitted
mechanically to the monitoring instrument.
When chest compression is performed, the chest and springs (1.11 and
1.12) are squeezed together. The spring (1.12) can be moved to permit
changes in chest stiffness. Just as during rescue breathing, the move-
ments during chest compression are transmitted mechanically to the
monitoring instrument.
Chest compression must be concluded before rescue breathing is
started to reduce the risk of stomach inflation. This applies to
Ambu Man as well as to patients.
The carotid pulse can be felt on both sides of the larynx (1.14). During
chest compression the pulse is activated automatically by the bulb
(1.15), but can be activated manually by the training instructor or by
another trainee by squeezing the bellows (1.16).
4. Hygienic system
Schematic diagram:
The head bag has been mounted in the skull and the face piece fitted.
Insufflation has just started, see
W
.
A:
Trainee's air
B:
Ambient air
Insufflation is concluded and expiration has just started, see
E
.
NOTE:
If a leakage occurs around the mask or if insufflation proves dif-
ficult, it is normally due to incorrect positioning when lifting the chin
or to insufficient hyperextension of the head.
To comply with the requirements of the hygienic system, and to
achieve a proper seal and accurate measuring results, a head bag must
always be used.
All trainees must use their own face piece and head bag only during
training.
5. Monitoring instrument - see
R
Readings on the AmbuMan monitoring instrument can be viewed from
two sides. By activating a cover plate on the side facing the trainee,
instrument readings can be concealed from trainees undergoing a CPR
test, while allowing the training instructor to monitor the effectiveness
of the CPR on the opposite side.
4
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