Strength changeable knitted medicinal duct and forming method thereof
A variable and high-strength technology, applied in the field of braided medical catheters and their molding, can solve the problems of reduced flexibility of the tube body, inconvenient operation of the lumen, and damage to the lumen of the human body, achieving low cost, simple process procedures, increased degrees of freedom and The effect of flexibility
Active Publication Date: 2010-01-27
深圳市凯思特医疗科技股份有限公司
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- Application Information
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Problems solved by technology
Its shortcoming is that in order to make the tube body able to withstand contrast pressure, the hardness of the whole tube body is strengthened, which causes the flexibility of the tube body to decrease, which is not convenient to operate in the tortuous lumen of the human body, and is easy to cause damage to the lumen of the human body
Method used
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[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0019] figure 1 Among them, the variable-strength braided medical catheter is composed of an outer plastic tube 1, a reinforced braided mesh 2 and an inner plastic tube 3 from outside to inside, the reinforced braided mesh 2 is wrapped on the inner plastic tube 3, and the outer layer The plastic pipe 1 is wrapped on the reinforced braided net 2 . The outer tube 1 of the variable strength braided medical catheter is made of medical plastic, and its Shore hardness is 40A-70D; the reinforced braided mesh 2 is made of metal wire or fiber wire; the inner tube 3 is made of medical plastic Cheng, its Shore hardness is 70A-70D. The pressure per unit area of the variable strength braided medical catheter reaches 700psi-1200psi, the bending strength is 15000psi-21000psi, and the tension per unit area is 5000psi-8000psi.
[0020] figure 2 Among them...
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Abstract
The invention relates to a woven medical conduit with mutable strength and it's forming method. The conduit comprises outer plastic tube, strengthening woven net, and inner plastic tube in sequence, wherein the strengthening woven net wraps on the inner plastic tube, and outer plastic tube wraps on the strengthening woven net. The molding of the conduit adopt five procedures: extruding assistant plastic core with hardness of 60D-80D, extruding inner plastic tube from assistant plastic tube, continuously weaving strengthening woven net on the inner plastic tube, extruding outer plastic tube, and extracting assistant plastic core. The mutable intensive property of the conduit is realized by continuously weaving strengthening woven net with variation in strength or extruding outer plastic tube with variation in strength.
Description
technical field [0001] The invention relates to a braided medical catheter with variable strength and its forming method. Background technique [0002] Existing braided medical catheters are braided medical catheters with the same strength as the tube wall. [0003] Braided medical catheters of the same strength are braided with uniform strength reinforced metal mesh in the tube body, so that the tube wall has a high compressive capacity and can withstand the strong pressure brought by high-pressure contrast agents during angiography. Its shortcoming is that in order to make the tube body able to withstand contrast pressure, the hardness of the whole tube body is strengthened, which causes the flexibility of the tube body to decrease, which is not convenient to operate in the tortuous lumen of the human body, and is easy to cause damage to the lumen of the human body . [0004] The development of clinical medicine requires that the braided medical catheter should have good...
Claims
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IPC IPC(8): A61M25/00A61M39/08A61M25/16B29D23/00B29D31/51B29D35/08
Inventor 桂红
Owner 深圳市凯思特医疗科技股份有限公司