Anesthesia System Chenwei Cwm-302

• Drive: Gas Driven
• Gas Source: Oxygen, N2o
• Transport Package: Standard Export Packing
• Specification: ISO, CE
• Trademark: CW
• Origin: China
• Model NO.: CWM-302
• HS Code: 90189070
• Production Capacity: 5000PCS/Year

Product Description

Installation and operation

1. Set the gas bottle vertically and stably;
2. Stand on one side of the bottle, open, close quickly the bottle valve so as to clean the valve port;

! Notice
Don't face to the bottle valve port and don't open the valve for too long time; otherwise, the reverse pressure of the discharged gas will turn over the bottle.

1. The pressure regulator must be consistent with the bottled gas.
2. Clean the oil stains and dirties at inlet of the pressure regulator;
3. Install the pressure regulator on corresponding gas bottle and tighten it with wrench;
4. Turn counterclockwise the pressure regulating knob so that the pressure regulating spring is at free state;
5. Connect the corresponding HP gas hose and tighten it with wrench;
6. Connect the other end of the HP gas hose with the corresponding gas input port at rear of the machine;
7. Open slowly the bottle valve, regulate the pressure regulator so that the output pressure is 0.44MPa±0.16MPa.

 

End of the operation

1. Close the bottle valve;

1. Turn "MC-AC" selection knob to "gasbag" (10 in Fig. 4); Open counterclockwise the "APL" valve (adjustable pressure limit valve) knob (2 in Fig. 4) on the anesthetic system, press down the oxygen flush button (7 in Fig. 1) to exhaust completely the residual gas in the anesthetic machine, finally, close clockwise the "APL" valve (adjustable pressure limit valve) knob (2 in Fig. 4);
2. Unscrew counterclockwise the pressure regulator pressure regulating knob so that the regulating spring is at free state;
3. Check if the pressure gauge on the pressure regulator is zeroed so as to check if the bottle valve is closed completely;
4. If the pressure regulator will not be used for long time, remove it and cover the gas inlet and outlet of the pressure regulator with protection cover and place it in the well ventilated room without corrosive gas.

 

Power supply

! Warning:
1.GB 9706.15-1999 is applicable to the connection between all the medical electrical equipment and the connection between at least one medical electrical equipment and one/or   more non-medical electrical equipment. Even if there is no functional connection between the equipment individual parts, when they are connected to an auxiliary net power socket, it immediately forms a medical electrical system. The operator must realize that there exists a risk of rising of leakage current when the equipment is connected to the auxiliary net power socket.
2. When using this equipment, the auxiliary net power sockets the operator can touch should not exceed 4.

!  Caution:
The main power supply voltage is~220 V±10%; the frequency is 50Hz±2%.
 

Main power supply - AC

1. Insert the computer tail plug of the power supply cable into the ~220V power input socket at back of the ventilator (3 in Fig. 6);

1. Insert the power supply plug of the power supply cable into AC power socket on the wall;
2. When the AC power supply is working, the display screen displays "AC" on the power supply status window. 

 

Backup power supply

1. When the backup power supply battery is fully charged, it may not use external power supply but use directly the backup power supply.
2. When the backup power supply is working, the display screen displays "Backup" on the power supply status window. 

 

Main power supply - backup power supply switchover

1. In the course of operation, when the AC power is in failure, it may automatically switch over to the internal backup power supply to work. 
2. After the backup power supply is working, there will be a sound prompt, and at the same time, the display screen displays "Backup" prompt on the power supply status window.

Backup power supply battery under-voltage (lack)

1. When the backup power supply works until the battery voltage is insufficient, the display screen displays "Lack" on the power supply status window, and simultaneously, there is a sound alarm.
2. At this time switch over to the AC power supply or switch off the power on the equipment timely, and charge the battery timely.

!  Warning:
When the backup power supply battery is under-voltage, it should be switched over to the AC power supply timely; if it cannot be switched over to the AC power supply, turn off the ventilator timely, and use the manual ventilator immediately to carry out manual ventilation.
 

Backup power supply battery charge

1. When the equipment is working under the AC power supply and the power switch is turned ON, the backup power supply battery is being charged automatically. 
2. Charging can be carried out continuously or intermittently.
3. After the equipment is switched over to use the backup power supply, the battery should be charged timely; generally, being used for 1 hour, the charging time should be over 3 hours.

 

Backup power supply battery discharge

1. If the backup power supply battery is not to be used for a long time, it should be discharged periodically.
2. The discharge method is: Disconnect the equipment with the AC power supply, turn ON the power switch to use the backup power supply to work for approx. 2 hours. 
3. After discharging, the battery should be charged timely according to the above charging method.
4. Generally, the discharge time interval is not more than 3 months.

 

Backup power supply battery replacement

1. Under normal condition, the battery may be used for 3~6 years. If there is frequent overload use, frequent power off or extreme high ambient temperature, the battery efficiency will be reduced, and its operating time shortened correspondingly. 
2. After the battery efficiency is reduced or the battery damaged, the battery should be replaced. The replacement work should be done by the professional technical personnel. When making the replacement, switch off the AC power supply, then open the backup power supply battery lid at rear of the anesthetic system and take out the battery for replacement. Replace the battery with a new one of the same specification, and never reverse the battery electrode.

!  Warning:
Do not throw the replaced battery into fire during maintenance and repair to avoid explosion; do not open or destroy the battery, because it contains hazardous substances that may cause injury to the skin and eyes; The battery should be sent to the recycling manufacturer for recovery or disposed.
 

Fuse replacement

1. AC power supply fuse replacement

When using AC power supply to work, and AC power works properly, but there is no display in screen when the power switch is turned ON (1 in Fig. 6), at this time, check the ~220V power supply socket/fuse box (3 in Fig. 6). Pull out the power cable, open the fuse box by and check the fuse. If the fuse is damaged, replace it with a new one of the same specification and model as the original.

1. Backup power supply fuse replacement(with optional backup power):

When using backup power supply to work, and there is sufficient power in the backup power supply battery, but there is no display in screen when the power switch is turned ON (1 in Fig. 6), at this time, check the backup power supply fuse (2 in Fig. 6). Open the backup power supply battery lid at rear of the anesthetic system and take out the backup power supply fuse box and check the fuse. If the fuse is damaged, replace it with a new one of the same specification and model as the original.

1. Fuse specification and model

-AC power supply RT1-20-1 A
-Internal backup power supply     RT1-20-10 A
!  Warning: :
1) When checking and replacing AC power supply fuse, pull out the power cable plug. 
2) When replacing the fuse, be sure to replace it with a new one of the same specification and model as the original.
 

Inspections before use

! Warning:
1) Each time before use, it is necessary to check ventilation function and safety performance of this equipment, to ensure that the equipment is intact during use.
2) Do not use faulty equipment. If alarm function is abnormal, this equipment must not be used; otherwise patient may be injured or even die or equipment may be damaged.
 

Inspection period

Inspection before use shall be carried out in case of the following:

1. Before use for the first patient each day;
2. Before use for each patient;
3. After maintenance, cleaning and disinfection;
4. After repair.

 

System inspections

1. Installation and connection of each part shall be firm and correct;
2. Breathing pipeline shall be intact and connection shall be firm and correct;
3. Vaporizer is locked to its position and loaded with sufficient and correct drug;
4. Gas supply connection is correct;
5. When using main gas supply, valve of backup gas bottle shall be closed;
6. Power cable plug shall be firmly inserted in wall power supply socket. When power supply switch is turned on, ventilator display shall light up.

 

Inspection of power supply fault alarm

1. Connect AC power supply and turn on power switch to start the ventilator. Display shall show "AC".
2. Unplug power cable plug. The power supply shall automatically switch to backup power with an audio prompt. Display will show "Backup power".
3. Reconnect power cable plug. Audio prompt shall disappear and display shall show "AC".

Inspection of gas supply

Inspection of gas supply

1. Supply pressure of central gas supply system shall be 0.44MPa±0.16MPa (0.28Mpa~0.60MPa);
2. If bottles are used to supply gas, they shall be full or contain sufficient amount of gas;
3. Output pressure of bottle pressure regulator shall be adjusted to 0.44MPa±0.16MPa (0.28Mpa~0.60MPa);
4. Backup bottles shall be provided to ensure gas supply. Valves of backup gas bottles shall be closed.

 

Leakage detection

1. Turn flowmeter flow control knob clockwise. Close flow of O₂ and N₂O;
2. Turn on supply of O₂ and N₂O respectively;
3. When indicated values on corresponding O₂ and N₂O pressure gauges on anesthesia system are stable, close gas supply;
4. Observe O₂ and N₂O pressure gauges; fall of indicated values in 1min shall not exceed 10kPa;

1. If the fall exceeds 10kPa, there is gas leakage. Locate the leakage and repair;
2. Gas may be leaking at:

-connection between HP gas hose and pressure regulator;
-connection between HP gas hose and corresponding gas inlet on anesthesia system;
-pressure regulator;
-HP gas hose;
-flowmeter not closed;
Physical specifications
Demension:70x85x140cm,weight:65kg,screen:12.1 LCD
display graphics:wave forms P-T,F-T,V-T ,
loops:P-V,V-F,F-P(zoom in/out ,freeze,comparison)
working specifications
power:AC110V-240V,50HZ/60HZ, battery power:≥180 mins
Calibration:auto
Pipeline supply gas:O2,N2O,air
ventilator specifications
patient range:adult,peadiatric
ventilation mode:VCV,A/C,SIMV-V,AIMV-P,MANUAL,STAND-BY,PCV,PSV
ventilator parameter
working type:electronic control ,pneumatic driven
tidal volume:20-1500ml ,pressure range:5-60 cmH2O
RRR:1-100bpm,, I:E range:4:1-1:8
Ptrigger range:-20-20 cmH2O,,
minute volume range:>18L/min
System 
Hypoxic guard system:N2O cut off valve,
O2 concentration>25%, safety valve:<12.5kPa
O2 flush:25-75L/min
flow meter:5 tubes cascade 0-15L/min O2,0-15L/min N2O,
0-15L/min AIR

volume of CO2 absorber:2L , vaporizer: 2/2 piece 
Monitoring:VT,MV,BPM,Paw,LUNG compliance,inspiratory platform, FiO2
PEEP
type:intergrated electronic control ,
range:off/ 3-30cmH2O