The wide application of
endoscopes in the medical field makes it one of the important tools for humans to peep and treat internal organs of the human body. A medical endoscope is a commonly used medical device, which consists of a bendable part, a light source and a set of lenses. It enters the human body through the natural channels of the human body or through small incisions made by surgery. When in use, the endoscope is introduced into the pre-examined organ, and the changes in the relevant parts can be directly observed. However, once the endoscope fails, it will affect the treatment of patients. Then, it is particularly important to maintain and refine the management of endoscopes.
The following will introduce some common faults and maintenance methods about endoscopes.
1. The image is disturbed
Generally, it is because the electric knife and other high-frequency equipment interfere with the line. What we need to check at this time is whether the shielding wire in the connection between the camera and the connection is connected. Another situation is that interference stripes will appear when high-frequency equipment is not used. At this time, the shielding layer of the connecting cable is worn due to long-term use. It needs to be checked whether there is a problem with the connection of the camera or the aging of the entire line. The former needs to be re-soldered, while the latter needs to replace the connecting wire. At present, the price of replacing the imported 3m long connecting wire is around 10000RMB. Therefore, try to avoid the wire being run over by the instrument trolley or surgical trolley on the ground during use.
2. Image color cast.
When the color of the scene cannot be restored after white balance and without the influence of other supporting equipment, we think it may be caused by the aging wire signal transmission defect, or it may be caused by the aging and deterioration of the camera circuit components, or it may be caused by the aging of the camera CCD . At this point we only need to replace the corresponding accessories.
3. The failure of the camera host is generally rare.
If a software failure (program failure) occurs, you can only take it back to the manufacturer to replace the program chip!
4. Common faults of image recording system
a. The foot switch is malfunctioning.
b. The connection wire of the video screen is not in good contact.
c. Computer hardware failure.
d. System software or image acquisition software failure.
These are relatively simple issues and will not be discussed here.
5. Common failures of the light source system
The light is dim.
Except for the reason that the grating is blocked, it is basically certain that the bulb is close to its service life, and it can be replaced with a new bulb. The service life of argon light bulbs is generally designed to be 500 hours. If the light source system has a life timing device, this problem can be easily solved.
2. The light bulb does not light up when the machine is turned on.
If the cause of burning the bulb is ruled out, then the problem often lies in the high-voltage ignition circuit of the host, because the machine will generate tens of thousands of volts of pulsed high voltage when it is turned on, and the components will age very quickly. Note that you cannot use a multimeter to check the pulse high voltage at this time.
6. Common faults of artificial insufflation system
The pressure display is incorrect.
This may be due to the damage of the gas pressure sensor. If the machine is designed to have a group of multiple differential pressure sensors working at the same time, generally when one is aging or polluted and cannot work, we need to replace all the sensors, otherwise only one of them will be replaced, and the others will be replaced. The sensor life of the same group is also close to critical.
7. The flow rate is not accurate.
If the gas flow sensor is damaged, replace it. Sometimes the flow rate is calculated by the differential pressure, at this time we need to replace the new differential pressure sensor.
8. The equipment leaks air.
In many cases, it is caused by the aging of the instrument sealing ring. However, there are also reasons for the leakage of the mechanical pressure reducing valve of the equipment and the damage of the solenoid valve, which are relatively easy to judge and repair.
9. Common faults of liquid pressurization system
The peristaltic pump is damaged.
The liquid pressure sensor is damaged. Its principle is basically the same as the gas pressure sensor.
The internal circuit of the device is damaged.
10. Common faults of electrocoagulation and cutting system
Equipment accessories are damaged, such as foot switches, negative plate wires, connecting wires and other commonly used vulnerable parts.
Electrocution, electrocoagulation, and bipolar faults, inside the equipment, these parts are composed of different circuit modules, and we can repair or replace the corresponding module circuits according to their fault symptoms.
11. Common failures of power and ablation systems
a. The power system is mainly due to the wear of the cutting head and the problem of the high-energy motor in the planing handle. The replacement of the motor is selective, and not every motor has replacement parts. Therefore, special attention should be paid to protection during disinfection and use.
b. The ablation system is mainly caused by the loss of the cutter head in the surgical application. The equipment failure is mostly a circuit failure, generally starting from the output part.
12. Common failures of the flushing suction system
a. Insufficient pressure or suction. The two-way pump in the equipment is aging, or the negative pressure bottle is leaking.
b. The failure of the device to turn on is generally caused by liquid entering the device. It is enough to clean up the misabsorbed liquid without burning out the relevant components.
In summary, the application of medical
endoscopes in the medical field cannot be underestimated. However, in the face of various failures, the correct maintenance method is very important. Regular maintenance and inspection of endoscopic equipment to ensure it is in top condition helps improve physician productivity and patient experience. In case of complex problems, be sure to seek professional technical support to ensure the reliable operation of medical microscopy.
