6300A Operator’s Manual
- 17 - NewTech Medical Limited
6.2 Maintenance
6.2.1 Maintainability
The
6300A
ventilator is designed to place reliability at the principal position, and it is required that
the mean time of break free (MTBF) of the whole machine be greater than 2000 hours. But human
operates the machine; the operating life of the machine in a great extent is dependent on the
human factors. Correct operation and careful maintenance will greatly prolong the life of the
machine, and reduce the appearance of faults. The repairing operation is divided into maintenance
and repair. By maintenance it is meant the fault location and removing after fault appears. The
repair is under the charge of the repairing personnel from the factory or specified maintenance
point; the user should not carry out repairing by him. For the doctor or nurse who operates the
ventilator, stress should be laid on the regular maintenance of the machine.
6.2.2 Disinfect, cleaning, drying and correctly install of the easy
damageable part.
The pipeline for connecting the machine and patient is easy to be polluted, so disinfectant is
needed, and the method is shown in the operation manual. The airway channel
、
connector and
sensor, etc. After disinfectant should be correctly installed in position without gas leakage. After
installation, trial running should be conducted, and the machine can be connected to patient and
used only after it is operated normally. It should be specially specified that the arrowed head on the
flow sensor means the flow direction, and it should not be installed in reverse. Also the sensor of
the inspiration circuit and that of the expiration circuit can’t be mistaken. Generally, the expiration
channel is easy to be polluted, thus just disinfecting the expiratory flow sensor is OK. After
disinfectant and cleaning, it must be dried, otherwise, if there is water on the wire mesh, the
resistance will increase, the expiration flow will become inaccurate, thus the reading on the expired
minute volume meter will be affected.
Those parts that directly touch the patient's body are easily polluted, the sterilization must be done
after every use as explained before. It must be here emphasized is that: One must do strictly the
correct installation after every cleaning and sterilization. The recovered machine must be tested
and ensured in good condition before putting in reuse for patients.
6.2.3
Maintaining good contact for connectors
The connector comprises airway connector and circuit connector. For all the joints, rubber
connectors and delivering pipes of the airway, good contact should be ensured so as to guarantee
the gas circulating without gas leakage. For all the connectors in the circuit, check should be
conducted before operation, especially connectors of inspiration valve and expiration valve, as they
have no locking device, main check should be carried out to prevent them from loosening.
6.2.4
Correctly operation of panel knob
The panel knob should be operated carefully with slight motion. In special, the potentiometer knobs
should not be screwed with force when the terminal position is attained as this may lead to
dislocation. After dislocation, the set value is not accurate, which even may cause abnormal
operation of the machine.
