Frequently asked Questions with the dre anesthesia machine

　　Preparation of the dre anesthesia machine

　　1. Set the upper and lower limits of tidal volume, ventilate volume per minute and airway pressure alarm (generally ±30 of the predetermined target value) according to the specific situation of the patient.

　　2. The pressure limit of tidal volume or pressure limiting ventilation is generally 20cmH2O first.

　　3. Set your breathing rate.

　　4. Set the inhale-to-breathe ratio.

　　5. Select the ventilation mode capacity control or pressure control.

　　6. Check whether there is any medicine in the inhalation anesthetic volatile tank.

　　7. When turning on dre anesthesia machine, there should be a low oxygen pressure alarm. Turn on central oxygen and the hypoxia alarm is gone.

　　8. Check the O2 flowmeter. The O2 flow rate should be greater than 10Lmin when the knob is turned on to the maximum. The O2 flow rate should be 150Lmin when the knob is turned off to the minimum.

　　9. Check if the quick flush oxygen is working. Confirm that the oxygen pressure gauge should rise to 04 or higher after rapid oxygenation.

　　10. Check the sodium-lime tank and sodium-lime.

　　11. Connect the spiral tube to the suction sac.

　　12. Turn off the O2 flow rate to the minimum at the outlet of the threaded pipe by hand and rush the respiratory pressure to 40cmH2O with fast charging O2. At this time, there should be a continuous high pressure alarm and the pressure should still be higher than 30cmH2O within 15 seconds.

　　13. Release the threaded pipe outlet and start the ventilator anesthesia machine up and down the bellows. There should be an offline alarm.

　　14. Manually plug the threaded pipe outlet and inflate the respiratory sac with rapid oxygenation to check whether manual ventilation is effective.

　　15. Select a mask that matches the patient's face and check that the mask air cushion is inflated.

　　dre anesthesia machine Precautions:

　　1. Before use

　　(1). Power down the machine

　　a. Check that the machine is completely stopped.

　　b. Each gas should not have any flow.

　　c. Check whether anesthetic gas leaks from the carburetor, do not use smell identification, if there is leakage should be sent to repair immediately.

　　(2). Check the battery power status

　　(3). Spare cylinder capacity

　　a. Check cylinder pressure (≥745psig)

　　b. Whether the oxygen level is sufficient for an emergency respirator use.

　　(4). Oxygen supply failure alert Normal test

　　a. Set the system monitoring function to "STANDBY" or "ON" mode and open the oxygen and nitrous oxide flow valves.

　　b. Remove the oxygen supply line, determine the nitrous oxide flow stop, and issue a warning to prove that the oxygen supply failure warning function is normal.

　　(5). Central Line air source test

　　a. Reinstall the oxygen line, check that all connectors are securely connected, no gas leaks are heard, and the line is properly delivered without obstruction.

　　b. Check that the central air source pressure is 5055psig.

　　(6). Check the function of the gas flow rotation control button

　　a. The gas flow rate is easy to adjust accurately, and the buoy moves smoothly and does not get stuck.

　　b. Press the "Flush" control button to ensure that the bag fills quickly.

　　(7). Check whether the carburetor liquid is sufficient

　　a. Check the drug available liquid level in the carburetor.

　　b. Carefully fill the correct liquid to the appropriate level and record the quantity.

　　(8). Automatic alarm function test when oxygen concentration is insufficient

　　a. Calibrate oxygen sensor function

　　b. Adjust and test the high oxygen concentration and low oxygen concentration alarm for normal activation.

　　(9). Whether the carbon dioxide absorber changes color

　　a. Check the absorbent's shelf life and determine if its color is sufficient for the next operation.

　　(10). Confirm patient end pipe connection and pipe leakage test.

　　(11). Respirator function and warning test.

　　(12). Test of airway pressure monitor warning function.

　　(13). Functional test of exhaust gas removal system.

　　(14). Record and document inspection and inspection results.

　　2. When using the dre anesthesia machine

　　(1). Before you can connect to the patient, reset all parameters of the dre anesthesia machine according to the patient's condition

　　(2). It is advisable to use the end-expiratory tidal CO2 Et-CO2 monitoring system and a non-invasive oximeter to monitor the blood oxygen saturation concentration SaO2.

　　(3). Do not administer anaesthesia until you are sure the mask is securely sealed.

　　(4). During intubation, nitrous oxide flow should be stopped until the patient's airway is reconnected.

　　(5). The supply of anesthetics and nitrous oxide must be stopped during the separation of the patient's airway.

　　(6). Before removing the mask or removing the tube, try to give 100 oxygen for enough time to remove the anesthetic gas from the low pressure system.

　　(7). During surgical anesthesia, pay attention to whether the breathing air path is separated from the patient, whether the gas flow control setting button is accidentally switched, whether the patient's lung Compliance changes and whether there is gas leakage in the low-pressure system, so as to avoid insufficient oxygen supply.

　　(8). Exhaust bag adjustment to half full level.

　　3. After anesthesia machine use

　　(1). Close the cylinder and reduce the pressure to zero.

　　(2). Turn off the flow meter and be careful not to get stuck.

　　(3). Replace oxygen and nitrous oxide cylinders under pressure.

　　(4). Unplug the central system oxygen and laughter source.

　　(5). Remove patient air path and air bag.

　　(6). Turn off breathing apparatus, monitoring system and warning system.

　　(7). If the dre anesthesia machine is unstable or malfunctioning, it should be stopped immediately and repaired.

　　(8). Record and file relevant accident information.