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The disposable live tissue sampling forceps consists of a tip, pincers and operating handles. Many attachments such as foreign body forceps, hot biopsy forceps, scissors, scrapers and others have structures similar to biopsy forceps.
Tip
The tip is comprised of two cup-shaped pincer blades that can be opened and closed. The shape of the pincer blades is crucial for the various functions of biopsy forceps. They can be separated into seven types: single opening, double opening, window-type, needle-type, oval-type, crocodile mouth-type and tip-curved type. The blades of the disposable live tissue sampling forceps are made of stainless steel, and are sharp. Although the blades of disposable live tissue sampling forceps are also sharp, their wear resistance is poor. Therefore, the biopsy forceps blades that are repeatedly used have been specially treated on the surface to make them more durable.
Pincers
The pincers of the disposable live tissue sampling forceps consist of a stainless steel threaded tube with a wire that can open and close the pincer blades. Because of the special structure of the threaded tube, tissue mucous, blood and other substances can easily enter it, but it is not easy to wash them out completely. Failure to thoroughly clean the pincers after use will affect the ease of use, cause difficulty in opening and closing, and may even result in the inoperability of biopsy forceps.
Operating handles
The ring on the operating handles is used to wrap the thumb, and the wide circular groove is used to place the index and middle fingers. The force is transmitted to the pincer blades through the draw wire under the action of these three fingers.
Attention must be paid to the operation, use and maintenance of the disposable live tissue sampling forceps, otherwise it will affect the use of the endoscope.
Pre-testing
Before use, it should be confirmed that the biopsy forceps have been sterilized and they are used within the effective sterilization time. Before inserting the endoscope forceps, the opening and closing of the pincer blades must be checked. The specific method is to bend the biopsy forceps into a large circle (with a diameter of about 20 cm), and then perform multiple opening and closing actions to observe whether the pincer blades can open and close smoothly. If there are 1-2 times of unclear operation, the biopsy forceps should not be used. Secondly, the closure of the biopsy forceps needs to be checked. A thin paper, such as a sheet of paper, should be clamped with the disposable live tissue sampling forceps. The qualification is that the paper does not fall off. In addition, it is necessary to observe whether the two cup-shaped mouths of the pincer blades are completely aligned. If there is any misalignment, the use of the biopsy forceps should be immediately stopped, otherwise the forceps may scratch the endoscope.
Considerations during operation
Before inserting the forceps into the channel, the pincer blades should be closed, but it should be avoided to apply excessive force for fear of insufficient closure, which may cause the traction wire to stretch and affect the opening and closing of the pincer blades. When inserting into the channel, it should be entered in the direction of the opening of the forceps channel and should not come into contact with the channel opening. If resistance is encountered during insertion, the angle button should be loosened and the forceps should be inserted as straight as possible. If it still cannot pass through, another type of endoscopic biopsy forceps, such as a smaller model, should be used. When extracting the biopsy forceps, excessive force should be avoided, and assistants should hold it alternately and then bend it. Do not stretch both elbows too much. If the pincer blades cannot be closed, do not forcibly extract. At this time, the endoscope and the biopsy forceps should be pulled out of the body together for further processing.
Maintenance and care
The biopsy forceps should be rinsed with running water immediately after use to remove tissue fragments and mucus on the surface, and then soaked in a detergent or enzyme solution to keep it moist. This is the most critical step in ensuring the durability of the biopsy forceps, and ultrasonic cleaning is another key step. The biopsy forceps treated through ultrasonic cleaning are as bright as new. If the tissue on the surface and inside of the biopsy forceps has dried and it has affected the opening and closing of the pincer blades, other treatment methods are required.