ABSTRACT
The torsion rigidity of the outer sheaths of flexible medical endoscopes was theoretically and experimentally studied. It has been shown that the bulk of the torsion rigidity of the sheaths is provided by the outer plastic sheath plus a procedure for its fastening to the braiding, as well as the braiding. A way of fastening the outer sheath to the braiding has a great impact on torsion rigidity.
Subject(s)
Endoscopes , Medical Laboratory Science/instrumentation , Equipment Design , Equipment Safety , Mathematics , Models, Theoretical , Physical Phenomena , PhysicsABSTRACT
The paper deals with the rigidity of the outer sheaths of flexible medical endoscopes for bending on theories and experiments. It also shows that the outer plastic sheath connected with a metal braid makes a great contribution to the bending rigidity of the sheaths.
Subject(s)
Endoscopes , Elasticity , Endoscopy/statistics & numerical data , Equipment Design/statistics & numerical data , Materials Testing/statistics & numerical data , Metals/chemistry , Plastics/chemistryABSTRACT
Question related to the influence of the compressor height on the efficiency of the medical pneumohydraulic soft endoscopes was considered. It was stated that geometrical pressure on the system's branch input for forwarding air/water is essentially increased with the increase of distance from the floor to the light source, where the system's compressor is located. In the described version the pressure is increased by 25 per cent, which increase the efficiency of the mentioned above system. The clinical tests proved all those points. It was recommended to place the light source with the compressor possibly higher to the floor level.
Subject(s)
Endoscopes , Humans , LightingABSTRACT
The paper gives a calculation method for a lighting optical device consisting of light flux concentrator lamps rigidly installed in an ellipsoid reflector with heat-permeable coating, and the parameters of two big concentrator lamps for fibre endoscopes.
Subject(s)
Endoscopes , Light , Equipment Design , Fiber Optic Technology/instrumentation , Mathematics , Optical DevicesABSTRACT
The choice of the adequate relation K = R/a is discussed, where R is a corner radius of the field diaphragm used in flexible endoscopes with a square cross-section of the light zone in output faces of the regular bundle, and a is a distance from the diaphragm axis to the internal edge of its sides. When defining the above relation the design of the distal endoscopic head and its built-in components should be taken into consideration.
Subject(s)
Endoscopes , Equipment Design , Fiber Optic Technology/instrumentationABSTRACT
Two new flexible endoscopes (EGDB-VO-4, SK-VO-4) designed for examinations and intracavitary interventions in the upper and lower portions of the digestive tract are described. Specifications are given with special references to the design features as compared to the earlier models.
Subject(s)
Endoscopes , Duodenoscopes , Esophagoscopes , Gastroscopes , Humans , SigmoidoscopesABSTRACT
The method and a special set for measuring the rigidity in bending and the torsion rigidity of flexible endoscopic elements under experimental and operating conditions are described. The set consists of the following components: a base, two racks, three removable holders, a height gauge, a set of weights, a set of inserts allowing flexible endoscopic pieces 4-16 mm in diameter to be fixed in the holder. Some experimental results are given.
Subject(s)
Endoscopes , Colonoscopes , Equipment Design , HumansABSTRACT
The article deals with analysis of light-optic systems with halogen incandescent lamps incorporated into domestic light sources for fiber-optic apparatus, types OC-100, 0C-150 and OC-250, and for some foreign light sources of similar types. The recommendations given are aimed at the improvement of light-optic parameters of the systems where the lamp is built into the reflector.
