Heyer Pasithec - Operation Theory of the Pasithec System

H E Y E R P a s i t h e c
90 / 106 HEYER Pasithec, Operator’s manual Rev. 0.2 Draft - 12/09
If a portable all-purpose outlet is used as the alternating current supply, it must be in accordance with
EN60601-1-1 and cannot be put on the floor. Using other portable all-purpose outlets are not
recommended.
Do not connect the non-medical equipment directly to the alternating current outlet on the wall. Only
the alternating current supply of the isolated transformer can be used. Otherwise, the surface leaking
current may exceed the range permitted by EN60601-1 under the normal conditions, and equipment
malfunction may cause injury to patients or operators.
HEYER Pasithec is equipped with all-purpose alternating current outlet for connecting to other medical
equipment. Do not connect non-medical equipment to these outlets, or the surface leaking current
may exceed the range permitted by EN60601-1 under normal conditions and the equipment may
malfunction and cause injury to patients or operators.
A complete system current leaking test (according to EN60601-1) must be performed after any
equipment is connected to these outlets.
WARNING: Medical electrical equipment operators should avoid non-medical electrical
equipment and patients.
10.6 Operation Theory
The HEYER Pasithec is a continuous flow anesthetic system. It is equipped with an airway which can
transfer O
2
, N
2
O, AIR and inhalation anesthetic drugs. Airway parts can use O
2
, N
2
O and AIR, and the
O
2
, N
2
O and AIR which is needed reduce to 280 kPa~600 kPa can enter into the machine through a
high pressure pipeline. Once through the protective pressure reducer in the machine, O
2
and Air enter
into Pneumatic and Electronic Switch, while N
2
O-cut valve can only open when the pressure of O
2
more than 50kPa (the FiO
2
LOW alarm will be active when the pressure of O
2
is less than 0.2MPa in
the state of startup) and the N
2
O can enter into Pneumatic and Electronic Switch. Otherwise, N
2
O can
not enter the airway of the machine. The state of gas entering into flowmeter can set to three states
with the Pneumatic and Electronic Switch: OFF, O
2
+ N
2
O, and O
2
+Air. The flow of O
2
, N
2
O and AIR
can be adjusted by the knob of the flowmeter. Adjust O
2
and N
2
O proportionally to ensure the O
2
concentration is no less than 25%. O
2
, N
2
O and AIR are mixed in the flowmeter; the mixed gas in the
anesthetic drug vaporizer can take away part of anesthetic drug. Fresh gas can be transferred to the
patient breathing cycle or C.G.O by the fresh gas selection switch. The O
2
from O
2
flush is transferred
to the patient breathing cycle or C.G.O directly without going via the flowmeter and vaporizer. The
mixer gas or O
2
in the patient breathing cycle can maintain the breathing of a patient by setting
ventilation parameters and ventilation mode via machine or manually. The mixed gas or O
2
transferring to C.G.O can be used to maintain patient breathing via Maishi circle.