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Analysis of common failures of laparoscopy

Released on May. 31, 2022

Generally speaking, most general surgical operations can be completed by laparoscopic surgery. Such as cholecystectomy, appendectomy, gastric and duodenal ulcer perforation repair, hernia repair, colectomy, splenectomy, adrenalectomy, as well as gynecological ovarian cyst removal, ectopic pregnancy, hysterectomy, etc. After a long time of use, there will always be some failures. The editor of IKEDA organizes the common failure analysis of the laparoscopic system for everyone to better understand the laparoscopy.

Analysis of common failures of laparoscopy

1. Fault 1: Image interference

Mainly reflected in the horizontal stripe clutter on the monitor, image surgery.

There are two reasons for the failure. When the electrosurgical knife is used during the operation, there is interference, which is usually caused by electromagnetic interference, which is caused by the poor shielding of the video transmission line. After replacing the video transmission line with good shielding effect, the fault can be eliminated. Another situation is that when the interference occurs when the camera shakes, the reason for this interference is the poor internal contact of the camera connection. Poor contact causes image disturbance. At this time, replacing the camera cable is a reliable maintenance method. In special cases, you can also twist section by section, bend the connection line, find the approximate part where the breakpoint occurs, and then determine under the X-ray that it is the breakpoint with the signal line, and the fault can be eliminated if it continues. But this kind of camera cable after the release and repair is prone to the same failure again.

2. Fault 2: The cold light source bulb does not light up

There are two possible reasons for troubleshooting a light bulb not lighting up.

Reason 1: When the fault is eliminated after replacing the bulb, it means that the bulb has been scrapped. At present, the cold light source is xenon bulb. Xenon bulbs are consumables, and their guaranteed life is 500h. There is a timer on the panel of the cold light source. The probability of problems with the bulb within 500h is extremely small. After 500h, the timer of the cold light source will flash. STORZ's xenon bulbs have a long life and are generally used for more than 700 hours, but they cannot be used for a long time. The xenon bulbs are considered to be high-pressure excited gas bulbs. It may cause overload damage to the cold light source high-voltage module. Reasonable replacement of light bulbs can not only reduce costs but also reduce machine failures. When the light bulb is lit, a "pop" can be heard. When the light bulb can be turned on after 3 times of firing, the light bulb must be replaced.

Reason 2: When the light bulb still does not light up after replacing the bulb, it can be judged that the fault is caused by the damage of the high-voltage module of the cold light source, and only the high-voltage module can be replaced. Proper replacement of the bulb and not firing the bulb when the bulb is high voltage can prevent damage to the high voltage module.

3. Failure three: liquid contamination of pneumoperitoneum machine

When the inside of the pneumoperitoneum machine is contaminated, the pneumoperitoneum machine will display the fault code E32, and the machine will be locked and cannot work.

If there is liquid in the pneumoperitoneum tube during failure, the backflow will cause damage to the inside of the machine. When troubleshooting, it is necessary to completely remove the liquid inside the pneumoperitoneum, and then connect the pneumoperitoneum machine and the computer with the RS232 cable. After eliminating the fault code with special software The pneumoperitoneum can return to normal. When this fault occurs, in order to prevent surgical contamination, the machine is immediately locked, and the operation cannot be performed normally, so it should be avoided in use. As long as the fluid in the pneumoperitoneum tube is completely drained before the operation and the placement height of the pneumoperitoneum machine is raised, this failure can be completely avoided.