1. Precautions during use Hard tube endoscopes are not damaged during surgery. Although they may contact and collide with human tissues such as muscles, mucous membranes, and bones, these bumps are slight and do not cause glimpses. The mirror is damaged because it only serves as an observation and is not a stress point for other instruments. However, when using other instruments, especially the jaws and scissors which have a large biting force, it should be noted that the front end of the mirror tube should not protrude into the occlusal area of the instrument to avoid accidentally injuring the lens tube. In the use of such devices, sometimes the doctors extend the speculum very close to the tissue in order to see the tissue in the occlusal zone. When the device is occluded, the speculum does not return and the speculum is accidentally injured. During the operation, it is possible to avoid such accidents by paying attention so that the occlusal mouths of the instruments are all within the scope of the speculum.
Some surgical speculums are used in the sheath. When replacing other angle speculums or plugging in and pulling out the instruments, care should be taken to avoid movements and excessive force. Especially during the process of inserting and removing the speculum, you should carefully look for the cause when you encounter resistance and pull it out. If necessary, you should take it together with the sheath and do not use brute force. When the scope is equipped with laser vaporization, high-frequency cutting, microwave and other optoelectronic techniques for surgery, attention should be paid to the distance between the front end of the scope and the treatment point to ensure that the front end of the scope is not shocked or burned. When using these devices for the first time, the chief surgeon should practice repeatedly to understand the relationship between the object distance and the actual object distance in the speculum image, and confirm the closest distance between the tip of the speculum and the treatment point so as to be applied freely in the actual operation. At present, planers have been widely used in the ENT, orthopedic surgery, to remove diseased tissue. The knife head is sharp, high in hardness, fast in rotation, and has large torque. If the endoscope is cut, the speculum will be undoubtedly damaged. In such surgery, attention should be paid to adjusting the speed of irrigation and suction, to ensure that the speculum image is clear and not blocked by blood, and the rotating part of the control head is always within the scope of observation. When the scope of surgery is large, it should be stopped. The cutter head rotates, then the speculum is moved, and then the cutter head is moved under the surveillance of the speculum, and then it is turned to the plane after the proper position. When it is felt that the work of the planer is abnormal or the illumination suddenly drops, the speculum may have been damaged and it should be replaced in time to avoid further loss. In most important surgeries, there should be a set of backup scopes and key instruments that can be easily replaced when a problem is found. If a viewfinder or an unsupported device with an inappropriate angle is used for surgery, it can easily cause damage to the speculum.
2. How to maintain a hard-tube endoscope A hard-tube endoscope should be kept by a specialist counter and placed in a special packaging box lined with a soft sponge or polyurethane foam. All speculums and surgical instruments must be placed neatly and not overlapped. After the cover is properly covered, the internal speculum and instruments do not collide with each other during handling. Because the endoscope's mirror tube is very thin, it will be bent and deformed by being squeezed, bumped, bent, dropped, etc., resulting in lens damage or optical axis shifting that may cause the image to be unclear or unusable, so take it out of the box. When placing into a hard-tube endoscope, place it on your hands and gently remove or insert it. Do not lift it for a while. When the speculum is moved in a rigid container such as a tray, be careful to separate it from other instruments and avoid bumping into the speculum. The desiccant should be kept in the box to keep it dry.
Ordinary hard tube endoscopes are not resistant to high temperature and high pressure, mainly due to deterioration and deformation of the encapsulating glue at high temperatures, and the speculum will open the glue into the water, so it cannot be sterilized by high temperature and high pressure methods such as boiling and high pressure steam. Most hard-tube endoscopes are damaged due to lack of attention to maintenance, bumps, and landing. There are also problems with the packaging glue, packaging technology, and packaging structure of individual production plants, causing the phenomenon of water ingress and opening of the speculum, which can be repaired. Although the hard tube endoscope is a delicate medical instrument, it is not prone to problems in normal clinical surgery or observation. As long as they are used, well-maintained, and carefully maintained, doctors can use it with confidence. Hard-tube endoscopes will also maximize their effectiveness.
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