Common troubleshooting and daily maintenance of anesthesia machine
Anesthesia machine is a kind of advanced medical equipment that can deliver, control and assist the patient's breathing of a variety of gases and volatile anesthetics, and at the same time adjust the patient's consciousness and pain level during the operation.
Xiao Yunyun sorted out some common failures of anesthesia machines for everyone, for your reference only, if there is any omission, friends can add in the comment area~
1. Failure phenomenon: The patient's breathing circuit is leaking.
possible reason:
1. The APL valve is not closed during manual control;
2. The soda lime tank is not installed tightly;
3. The threaded pipe is damaged or the joint is loose;
4. The valve cover is not tightened;
5. The manual/automatic transfer switch is out of order.
Solution:
1. Close the semi-tightly closed APL valve;
2. Reinstall the semi-closed APL valve;
3. Replace with new pipes or reinstall pipelines;
4. Retighten the valve cover.
2. Failure phenomenon: The folded bag at the end of expiration cannot be stretched to the top.
possible reason:
1. The selected breathing rate is too fast when the tidal volume is large;
2. The patient's breathing circuit is leaking;
3. The flow control switch is not turned on;
4. The pressure value of the relief valve is not adjusted correctly.
Solution:
1. Reset the appropriate breathing rate;
2. Check the leak point according to the method described in the above example;
3. Turn on the flow control switch.
3. Trouble phenomenon: The folding bag is not compressed or the compression range is not enough when the air is supplied.
possible reason:
1. The working mode switch of the anesthesia machine is still in the manual position;
2. The fast oxygen supply switch fails and leaks;
3. The glass cover of the bellows is damaged;
4. Airway obstruction.
Solution:
1. Set the working mode switch to the machine control position;
2. Replace the bellows glass cover;
3. Remove airway obstructions.
Four, malfunction phenomenon: excessive pressure in the airway during manual breathing.
possible reason:
1. The pressure reducer is faulty, and the output pressure is normal when there is no load, and the pressure is lower than 0.25Mpa when the oxygen is supplied quickly;
2. The setting value of the air release valve is not adjusted correctly.
Solution:
1. Replace the pressure reducer;
2. Adjust when the flow rate is 1L/min, and adjust the output of the air release valve to a proper range.
Fifth, the fault phenomenon: the upper limit of the airway pressure alarm.
possible reason:
1. The patient end pipeline is not smooth;
2. The patient's airway is obstructed;
3. The upper limit of airway pressure is set too low;
4. Changes in ventilation parameters.
Solution:
1. Check the patient end pipeline and correct it smoothly;
2. Check the patient's respiratory tract status;
3. Re-calibrate the alarm setting value;
4. Recalculate and adjust ventilation parameters.
Sixth, failure phenomenon: the lower limit of airway pressure alarms.
possible reason:
1. Leakage in the gas pipeline at the patient's end;
2. The alarm setting value is too high;
3. Changes in patient compliance.
Solution:
1. Check the pipeline and correct the leaking part;
2. Reset the alarm value;
3. Check the patient's compliance status.
Seven, malfunction phenomenon: There is no indication of the airway pressure parameter.
possible reason:
1. The connecting pipe between the suction channel and the pressure sensor is loose or reversed;
2. The gas source is exhausted.
Solution:
1. Reconnect the connecting pipe between the suction channel and the pressure sensor;
2. Replace the air source.
8. Malfunction: The deviation between the tidal volume and the set value is large.
possible reason:
1. The flow sensor is damaged;
2. The flow sensor needs to be calibrated;
3. The exhaled gas pressure sampling tube is blocked.
Solution:
1. Replace the flow sensor;
2. Check and re-calibrate the flow sensor;
3. Replace the exhaled gas pressure sampling tube.
X. Failure phenomenon: Positive end-expiratory pressure occurs when PEEP (Continuous Positive End-Expiratory Airway Pressure) is not used.
possible reason:
1. The sac has a large self-gravity;
2. Improper setting of gas compensation flow rate;
3. The airway is blocked.
Solution:
1. Reduce the weight of the skin;
2. Use appropriate flow control;
3. Unblock all parts of the airway.
Daily maintenance of anesthesia machine
1. Frequent daily inspections and maintenance, including cleaning components, cleaning up water, calibration data, etc.
2. Regular inspection and maintenance of the whole machine, timely reinforcement of air pipe joints, replacement of aging pipes, filter membranes, rubber rings, etc.
3. Prepare a certain amount of commonly used accessories, such as flow sensors, quick connectors, various specifications of air pipes and rubber rings, etc.
