The Principle of Curved Rubber Endoscopes can be explained in simple terms by referring to the basic components. These components are the guide tube, flexible endoscope, and controls. The guide tube connects the endoscope to an electrical, water, or gas source, and the distal portion is controlled by dials. A locking mechanism prevents the instrument tip from turning too quickly, and it also provides a level of resistance while the control knobs are turned. In addition, there are two valves in the endoscope proximal shaft, and air insufflation is controlled by lightly occluding the distal button, while water irrigation is controlled by pushing down on the distal button. A control handle is also attached to the endoscope and has buttons for changing the image on the video screen.
Guide tube 14
The guide tube 14 of a curved rubber endoscope has a rigid structure throughout its length, which allows the shaft 20 of the endoscope to travel along a curved pathway. It may include fewer than four tensioning wires that are individually or simultaneously manipulated to effect a tensioning force.
There are several possible solutions to the peristaltic problem. One method is to apply a graphical solution to the peristaltic model. For example, if a curved endoscope has an outer sinusoidal wall, the amount of trapping would be reduced. The other method is to apply a peristaltic mechanism, which uses compressed air to expand and a spring to contract.
The guide tube 14 of a curved rubber endoscope may be rigid, or flexible, and may be curved. It may be made of plastic or rubber to maintain its shape. Some curved rubber endoscopes are designed to be flexible and retortable. The guide tube 14 is typically about five inches in diameter, although the actual diameter may vary.
The guide tube 14 of a curved rubber endoscope has an inner elastomeric covering that covers the outer periphery of the structural body. This outer cover reduces the burden on the patient and allows for easier insertion. The cover also helps to avoid body fluids from entering the endoscope.
Another method of sterilization involves forming a sacculus on the external jacket of the curved rubber endoscope. This sacculus is then attached to the bending rubber sheath 44 with an adhesive. Ultrasonic bonding can also be used to bond the sacculus to the bending section of the endoscope. These alternative materials are used for disinfecting endoscopes, but they are expensive. Moreover, some polymeric materials can cause allergic reactions or damage to the mucosa.
Flexible endoscope 12
The flexibility of a flexible endoscope is one of the primary advantages of the device, but there are also some drawbacks. Using a flexible endoscope in small spaces can be difficult and the endoscope may not be able to move in the required direction in such a tight space.
Using a wide-angle lens system can result in image distortion laterally and reduce the overall length of the endoscope. The lateral dimension of the image field may not be proportional to the corresponding lateral dimension, but the overall image area should substantially correspond to that of the field of view.
One of the major problems of traditional rigid endoscopes is their inability to change viewing directions. A flexible endoscope can be angled either forward or retrograde. This is an important advantage because it gives surgeons the ability to use standard viewing angles without having to adjust the endoscope’s position.
Another problem with flexible endoscopes is disorientation caused by the varying viewing angles. Using an input 206, the user can easily rotate the image and avoid the disorientation that can result from viewing the same image at different viewing angles. The input 206 can provide selection 218 to the image control circuitry 204, which generates a field control signal 220 instructing image selecting circuitry 202 to rotate the image.
Another benefit of a flexible endoscope is the stability. Its stability can help surgeons perform complex endoscopic resections. The device also features a two-channel design. Its ability to use two endoscopic arms also enables triangulation, which can improve ESD procedures.
Controllable distal portion 22
A controllable distal portion of a curved rubber endoscope can be used to guide a medical instrument. Its flexible segment includes a structure for transmitting wire tension and flexing with the organ curvature. The flexible segment is electrically connected to the control unit 10, which may be a personal computer. The control unit includes a display unit 11 and an input unit 12 such as a keyboard or a mouse.
The flexible distal portion of a curved rubber endoscope is movable, and can be rotated by the endoscopist. It comprises two parts: a first flexible portion that can be flexibly bent, and a second flexible section that can be passively flexed by an external force.
The flexible portion is typically 15