CN103127557A - Medical polyurethane catheter - Google Patents

Abstract

The invention discloses a medical polyurethane catheter composed of blended materials of polyurethane comprising 20% of barium sulfate and polyurethane comprising 40% of barium sulfate. The polyurethane materials with different barium sulfate contents are mixed according to different ratios. With the method provided by the invention, prior defects such as catheter hardness and elasticity can both be solved. Bending is prevented during catheterization, and the catheter has the advantages of good elasticity and pressure resistance. When catheter body is softened, the catheter is prevented from being flattened.

Description

Medical polyurethane conduit

Technical field

The present invention relates to technical field of medical instruments, specifically a kind of medical polyurethane conduit.

Background technology

Medical polyurethane conduit is mainly used in subclavian vein, is widely used in clinical treatment, can carry out diagnosis or the treatments such as hydromechanics monitoring, total parenteral nutrition (TPN), central vein pressure measurement, rescue medicine injection, malignant tumor chemotherapy, bone marrow transplantation.In infusion process, sometimes need to carry the liquid of two classes or the two above various traits of class, some liquid may be mixed together to be carried, but also some liquid must separately carry or adopt alternate manner to carry because the property of medicine is incompatible.

the retrieval technique document, " impact of granular filler on the polyurethane elastomer hydrolytic resistance " (Luo Yongbiao is arranged, Pang Deguang, Li Fangjun, hydraulic pressure and pneumatic, the 6th phase in 2005), " medical catheter is studied with the thermoplastic polyurethane processing characteristics " (Shanxi is firm, Lei Yucai, He Wei, Lu Feng, Zhong Ying, plastics industry, 11 phases in 2011) and " casting type polyurethane Development of Damping Materials " (chemical propellant and macromolecular material, Zhang Lijun, Zhang Yong, Chen Zhanyou, Zhou Wenying, Wei Yongji, 05 phase in 2010) all filler is studied the polyurethane performance, find that barium sulfate is a kind of comparatively desirable filler.

Although prior art adopts the polyurethane of barium sulfate as medical catheter, different due to the performance of different barium sulfate contents, easily separate out on the surface, and combination property is Shortcomings still, is easily flattened body by negative pressure after clinical middle deliquescing.

Summary of the invention

The objective of the invention is to overcome above-mentioned technical obstacle, a kind of conduit of good combination property is provided.

The present invention is achieved in that a kind of medical polyurethane conduit, and its component is: be comprised of the polyurethane that contains 20% barium sulfate and the polyurethane comixing that contains 40% barium sulfate.

The described polyurethane that contains 20% barium sulfate is 7:3 with the mass ratio that contains the polyurethane of 40% barium sulfate.

Compared with prior art, two kinds are contained after the polyurethane material of commensurability barium sulfate does not mix by a certain percentage, the shortcoming of conduit before conduit hardness and elasticity all can solve, difficult discounting when putting pipe, good springiness, compression resistance is difficult for being crushed after the body deliquescing.And have a following various features:

(1), the surface is more smooth, can effectively reduce the formation of fibrin sheath.

(2), improve biocompatibility, the arrhythmia that reduction thrombosis risk and minimizing cause because triggering reflection patient.

(3), soft durometer improvement, what cause after avoiding the conduit long period to keep somewhere in body undue softeningly causes conduit distortion knotting.

The specific embodiment

The preparation of the medical polyurethane conduit of the present invention is that polyurethane A and polyurethane B after the proportioning co-blended by 7:3, by the Precise Extrusion extrusion molding, are extruded conduit stable, dimensionally stable.

Barium sulfate composition in above-mentioned polyurethane A accounts for 20% of total amount.The trade mark of this product is GMTPU01001A, and hardness is 55D.

Barium sulfate composition in above-mentioned polyurethane B accounts for 40% of total amount.The trade mark of this product is GMTPU01002A, and hardness is 65D.

Barium sulfate has improved the combination property of polyurethane as a kind of filler of polyurethane.

With Precise Extrusion, this conduit is tested, major parameter has the temperature control system in 7 districts, servo-controlled main frame speed, accurate scavenger system, high-precision traction, cutting system.Parameter list is as follows:

Claims (2)

1. a medical polyurethane conduit, is characterized in that component is: be comprised of the polyurethane that contains 20% barium sulfate and the polyurethane comixing that contains 40% barium sulfate.

2. medical polyurethane conduit according to claim 1, is characterized in that, the described polyurethane that contains 20% barium sulfate is 7:3 with the mass ratio that contains the polyurethane of 40% barium sulfate.