CN205411754U - Compound catheter - Google Patents
Compound catheter Download PDFInfo
- Publication number
- CN205411754U CN205411754U CN201520924739.1U CN201520924739U CN205411754U CN 205411754 U CN205411754 U CN 205411754U CN 201520924739 U CN201520924739 U CN 201520924739U CN 205411754 U CN205411754 U CN 205411754U
- Authority
- CN
- China
- Prior art keywords
- polyurethane
- catheter
- polyvinyl chloride
- layer
- chloride layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Materials For Medical Uses (AREA)
Abstract
The utility model relates to a compound catheter belongs to the medical product processing technology field. Constitute by polyurethane skin, polyvinyl chloride layer and polyurethane inlayer, polyvinyl chloride layer in be provided with the polyurethane inlayer, and polyurethane is outer, polyvinyl chloride layer and polyurethane inlayer set up with one heart. Will the utility model discloses be applied to clinical infusion, have advantages such as biocompatibility is good, mechanical strength is high, the security is good.
Description
Technical field
This utility model relates to a kind of compound catheter, belongs to medical product processing technique field.
Background technology
In hospital surgical, clinical care and family health care are nursed, it is often necessary to use catheter, through per urethram inserting bladder so that by urine drainage out.Common catheter is distinguished from structure to be had single-chamber, two-chamber band balloon, three chamber band sacculus and rinses the multiple patterns such as chamber；The pipeline having natural rubber or latex, silicone rubber or polrvinyl chloride (PVC) to make is distinguished according to material；Cleaning batch (-type) oneself urethral catheterization intubation (CISC) and indwelling saccule urinary catheter intubation can be divided into again from the method used.
Modern medicinal practice and result of study show, natural rubber or latex contains anaphylactogen, as easy as rolling off a log cause allergy；And the biocompatibility of silica gel material is the best, but it is because: 1) expensive；2) tearing toughness of silica gel material is low, often occurs conduit rupture and sacculus the abnormal accident such as to rupture in Clinical practice.And polrvinyl chloride low price, high comprehensive performance, it is widely used in the manufacture of medical apparatus and instruments.
But, along with the development of clinically relevant medical science, it has been found that pvc material itself exists potential safety hazard, processing and serviceability also exists many defects:
(1) Corvic is producing or can produce a small amount of Vinyl Chloride Monomer in processing, and this compound has been found to be carcinogen, thus, it is unfavorable for life-time service.
(2) in the course of processing, in order to obtain soft PVC goods, it is necessary to use plasticizer, the use of current phthalic acid two (2-Octyl Nitrite) (DEHP) plasticizer is most, and this kind of plasticizer can enter medicinal liquid, and enters human body therewith, is detrimental to health.
(3) polrvinyl chloride is susceptible to signs of degradation in the course of processing, and is the generation preventing this degraded, and the compound that generally need to add the elements such as leaded, zinc and barium makees heat stabilizer, and in use, the heavy metal in these heat stabilizers is possibly into human body.
(4) polrvinyl chloride adds and can decompose generation hydrogen chloride gas, not only corrosion processing equipment man-hour, and threatens operator's health.
(5) the waste treatment difficulty of polrvinyl chloride medical disposable material, buries the most non-degradable, burns and then produces the toxic gas such as hydrogen chloride and two English, pollutes environment.
In pvc material, Vinyl Chloride Monomer, the DEHP plasticizer of interpolation and the heat stabilizer of residual are not to be chemically bonded on polrvinyl chloride molecule, and in Clinical practice, these little molecules can be detrimental to health by the modes such as diffusion, extraction and then entrance human body.
In view of pvc material and problem present in using, the most all can contend with polrvinyl chloride in research and development price, performance can meet blood exchange transfusion set use the new material of requirement.Chinese utility model patent 200420052781.0 discloses a kind of non-PVC transfusion device；Chinese utility model patent 200720029591.0 discloses a kind of single use TPO transfusion device；Chinese utility model patent 200510014749.2 discloses a kind of radiation modified polyolefinic thermoplastic elastomer blending resin, and this resin can be used for replacing the PVC material that tradition disposable transfusion device is used.
Although the above-mentioned non-PVC material developed solves certain technical barrier, but still suffers from many deficiencies:
(1) catheter surface that non-PVC material is made is tacky, there will be the phenomenons such as pipeline entanglement during preserving or using；
(2) mechanical property of non-PVC material is poor, and the pipeline of preparation is easily deformed under stress or ruptures.
(3) adhesive property of non-PVC material is the best, and pipeline in use there will be breakage, the phenomenon of leakage.
(4) non-PVC raw material and manufacturing cost are far above pvc material, are unfavorable for promoting the use of.
Non-PVC material yet suffers from a lot of defect in the application and processing of catheter, based on this, makes subject application.
Utility model content
In order to overcome the drawbacks described above existing for existing catheter, first this utility model provides the compound catheter that a kind of compatibility is good, mechanical strength is high.
For achieving the above object, the technical scheme that this utility model is taked is as follows:
Compound catheter, is made up of polyurethane outer, is provided with polyvinyl chloride layer inside this polyurethane outer, and polyurethane outer is arranged concentrically with polyvinyl chloride layer.
Further, as preferably:
It is provided with polyurethane internal layer in described polyvinyl chloride layer, and polyurethane outer, polyvinyl chloride layer and polyurethane internal layer are arranged concentrically.
Described polyurethane outer, polyurethane internal layer thickness are 0.05-0.35mm, and polrvinyl chloride layer thickness is 0.1-0.8mm.
This utility model is applied to the processing of catheter, polyurethane, polrvinyl chloride use concentric feeding manner to feed and extrude, by the polyurethane dried, pvc material, it is separately added in different charging apertures by the weight ratio of thickness requirement, and is extruded into compound catheter by coextrusion head；Wherein, coextrusion head is core rod type coextrusion head, and the center of plug matrix is hollow type structure, and this hollow type structure is positioned at matrix axis, and forms central feed channel in this place, can be passed through compressed air or lead directly to ambient atmosphere；Central feed channel side arranges side feeding-passage one and side feeding-passage two, polyurethane feeds from central feed channel and side third channel and forms polyurethane internal layer and polyurethane outer, polrvinyl chloride side feeding-passage one charging from side forms polyvinyl chloride layer, central feed channel, side feeding-passage one (with side feeding-passage two) carry out two-layer (when being provided with side feeding-passage two, be three layers) and feed with one heart；In extrusion, by regulating the size (core and the inside and outside footpath of external mold) of coextrusion machine head port mould, determine the wall thickness of catheter；By regulating each extruder feed rate ratio, determine the thickness ratio of the polyurethane outer of catheter, polyurethane internal layer, polyvinyl chloride layer；By extruded velocity and the speed ratio of traction machine of regulation extruder, the inside and outside footpath of regulation catheter；The circularity of catheter is regulated by the air pressure inside of central feed channel or the vacuum of bosh；Cooled down through vane by the regulation surface temperature of mouth die three-layer composite structure pipe that above-mentioned coextrusion is formed, regulate catheter surface roughness；Conduit through bosh cooling is drawn by carry-over pinch rolls again, is cut into the length of needs, uses rustless steel collection tray, obtain finished product.
The catheter outer surface of the multi-layer compound structure that this utility model is formed is polyurethane outer, during transfusion, water conservancy diversion, the surface that polyurethane outer contacts with tissue adherence is non-PVC material, there is excellent biocompatibility, thus avoid plasticizer in polyvinyl chloride conduit, heat stabilizer contacts mucosa with Vinyl Chloride Monomer, the problem being detrimental to health；Overcome the problems such as latex biocompatibility is bad, silica gel mechanical strength is low simultaneously.The polyurethane that this conduit uses and pvc material have the preferable compatibility, multi-layer compound structure transfusion catheter interlaminar bonding performance is preferable, good mechanical performance, it is suitable for solvent bonding, this utility model step is simple, method is reliable, and cost is far below non-PVC material, suitable large-scale promotion application.
The compound catheter of the application can use the double-layer structure that polyurethane outer and polyvinyl chloride layer are formed, may be used without polyurethane outer, polyvinyl chloride layer and polyurethane internal layer three-decker, when using double-layer structure, polyurethane outer and direct body contact, carry out the conveying of the discarded body fluid such as urine, when using three layers of mechanism, catheter interior, all can contact with human body human body fluid outward, now, polyurethane outer, polyurethane internal layer is biocompatibility material, therefore, available body fluids such as blood can be carried out, the conveying of medicament etc., in course of conveying, the polyurethane outer compatibility is preferable, the untoward reaction such as allergy will not be caused, polyurethane internal layer then will not introduce heavy metal, harmful monomer etc., available body fluid and human body closest to, avoid because of the detection accident caused by catheter self-defect and transfusion accident.
Accompanying drawing explanation
Fig. 1 is the first structural representation of the present utility model；
Fig. 2 is the second structural representation of the present utility model.
Label in figure: 1. polyurethane outer；2. polyvinyl chloride layer；3. polyurethane internal layer.
Detailed description of the invention
Embodiment 1
The compound catheter of the present embodiment, in conjunction with Fig. 1, it is made up of polyurethane outer 1 and polyvinyl chloride layer 2, polyvinyl chloride layer 2 is set inside polyurethane outer 1, and polyurethane outer 1 is arranged concentrically with polyvinyl chloride layer 2, polyurethane outer 1 thickness is 0.05-0.35mm, and polyvinyl chloride layer 2 thickness is 0.1-0.8mm.
After polyurethane, polrvinyl chloride are dried, in being placed in coextrusion head and extrude in concentric feeding manner, form concentric layered shell polysaccharide structure, cooling, draw, cut off molding.Wherein, side feeding-passage one carries out the feed of polyurethane, polrvinyl chloride respectively with center extrusion passage, to realize charging with one heart, and forms polyurethane outer 1 and polyvinyl chloride layer 2 respectively.
The present embodiment is applied to the processing of catheter, polyurethane, polrvinyl chloride use concentric feeding manner to feed and extrude, by the polyurethane dried, pvc material, it is separately added in different charging apertures by the weight ratio of thickness requirement, and is extruded into compound catheter by coextrusion head；Wherein, central feed channel side arranges side feeding-passage one, polyurethane forms polyurethane outer 1 from central feed channel charging, and polrvinyl chloride side feeding-passage one charging from side forms polyvinyl chloride layer 2, and central feed channel, side feeding-passage one carry out two-layer and feed with one heart；In extrusion, by regulating the size (core and the inside and outside footpath of external mold) of coextrusion machine head port mould, determine the wall thickness of catheter；By regulating each extruder feed rate ratio, determine the thickness ratio of the polyurethane outer 1 of catheter, polyvinyl chloride layer 2；By extruded velocity and the speed ratio of traction machine of regulation extruder, the inside and outside footpath of regulation catheter；The circularity of catheter is regulated by the air pressure inside of central feed channel or the vacuum of bosh；Cooled down through vane by the regulation surface temperature of mouth die two layer composite structure pipe that above-mentioned coextrusion is formed, regulate catheter surface roughness；Conduit through bosh cooling is drawn by carry-over pinch rolls again, is cut into the length of needs, uses rustless steel collection tray, obtain finished product.
The catheter outer surface of the multi-layer compound structure that the present embodiment is formed is polyurethane outer 1, during transfusion, water conservancy diversion, the surface that polyurethane outer 1 contacts with tissue adherence is non-PVC material, there is excellent biocompatibility, thus avoid plasticizer in polyvinyl chloride conduit, heat stabilizer contacts mucosa with Vinyl Chloride Monomer, the problem being detrimental to health；Overcome the problems such as latex biocompatibility is bad, silica gel mechanical strength is low simultaneously.The polyurethane that this conduit uses and pvc material have the preferable compatibility, multi-layer compound structure transfusion catheter interlaminar bonding performance is preferable, good mechanical performance, it is suitable for solvent bonding, this utility model step is simple, method is reliable, and cost is far below non-PVC material, suitable large-scale promotion application.
The compound catheter of the application can use the double-layer structure that polyurethane outer 1 and polyvinyl chloride layer 2 are formed, polyurethane outer 1 and direct body contact, carrying out the conveying of the discarded body fluid such as urine, this polyurethane outer 1 compatibility is preferable, will not cause the untoward reaction such as allergy.
Embodiment 2
The compound catheter of the present embodiment, in conjunction with Fig. 2, it is made up of polyurethane outer 1, polyvinyl chloride layer 2 and polyurethane internal layer 3, polyvinyl chloride layer 2 is set inside polyurethane outer 1, it it is polyurethane internal layer 3 inside polyvinyl chloride layer 2, and polyurethane outer 1, polyvinyl chloride layer 2 are arranged concentrically with polyurethane internal layer 3, the thickness of polyurethane outer 1 and polyurethane internal layer 3 is 0.05-0.35mm, and polyvinyl chloride layer 2 thickness is 0.1-0.8mm.
In the present embodiment, after polyurethane, polrvinyl chloride are dried, in being placed in coextrusion head and extrude in concentric feeding manner, form concentric layered shell polysaccharide structure, cooling, draw, cut off molding.Wherein, side feeding-passage one carries out polrvinyl chloride feed and forms polyvinyl chloride layer 2, side feeding-passage two carries out polyurethane feed respectively with center extrusion passage, and form polyurethane outer 1 and the outer internal layer 3 of polyurethane respectively, to realize charging with one heart, and form polyurethane outer 1 and polyvinyl chloride layer 2 respectively.
In the application, polyurethane forms polyurethane internal layer 3, polyurethane outer 1 from central feed channel with side feeding-passage two charging, polrvinyl chloride side feeding-passage one charging from side forms polyvinyl chloride layer 2, and central feed channel, side feeding-passage one and side feeding-passage two carry out three layers of concentric charging；In extrusion, by regulating the size (core and the inside and outside footpath of external mold) of coextrusion machine head port mould, determine the wall thickness of catheter；By regulating each extruder feed rate ratio, determine the thickness ratio of the polyurethane outer 1 of catheter, polyvinyl chloride layer 2 and polyurethane internal layer 3；By extruded velocity and the speed ratio of traction machine of regulation extruder, the inside and outside footpath of regulation catheter；The circularity of catheter is regulated by the air pressure inside of central feed channel or the vacuum of bosh；Cooled down through vane by the regulation surface temperature of mouth die two layer composite structure pipe that above-mentioned coextrusion is formed, regulate catheter surface roughness；Conduit through bosh cooling is drawn by carry-over pinch rolls again, is cut into the length of needs, uses rustless steel collection tray, obtain finished product.
The catheter outer surface of the multi-layer compound structure that the present embodiment is formed is polyurethane outer 1, during transfusion, water conservancy diversion, the surface that polyurethane outer 1 contacts with tissue adherence is non-PVC material, there is excellent biocompatibility, thus avoid plasticizer in polyvinyl chloride conduit, heat stabilizer contacts mucosa with Vinyl Chloride Monomer, the problem being detrimental to health；Overcome the problems such as latex biocompatibility is bad, silica gel mechanical strength is low simultaneously.The polyurethane that this conduit uses and pvc material have the preferable compatibility, multi-layer compound structure transfusion catheter interlaminar bonding performance is preferable, good mechanical performance, it is suitable for solvent bonding, this utility model step is simple, method is reliable, and cost is far below non-PVC material, suitable large-scale promotion application.
The present embodiment uses polyurethane outer 1, polyvinyl chloride layer 2 and polyurethane internal layer 3 three-decker, catheter interior, all can contact with human body fluid outward, now, polyurethane outer 1, polyurethane internal layer 3 is biocompatibility material, therefore, available body fluids such as blood can be carried out, the conveying of medicament etc., in course of conveying, polyurethane outer 1 compatibility is preferable, the untoward reaction such as allergy will not be caused, polyurethane internal layer 3 then will not introduce heavy metal, harmful monomer etc., available body fluid and human body closest to, avoid because of the detection accident caused by catheter self-defect and transfusion accident；And the setting of polyvinyl chloride layer 2 had both reduced processing cost, it with polyurethane outer 1, polyurethane internal layer 3 compatibility well, can improve conveying pipe overall mechanical strength.
Claims (4)
- The most compound catheter, it is characterised in that: it is made up of polyurethane outer, inside this polyurethane outer, is provided with polyvinyl chloride layer, and polyurethane outer is arranged concentrically with polyvinyl chloride layer.
- Compound catheter the most as claimed in claim 1, it is characterised in that: it is provided with polyurethane internal layer in described polyvinyl chloride layer, and polyurethane outer, polyvinyl chloride layer and polyurethane internal layer are arranged concentrically.
- Compound catheter the most as claimed in claim 1, it is characterised in that: described polyurethane outer thickness is 0.05-0.35mm, and polrvinyl chloride layer thickness is 0.1-0.8mm.
- Compound catheter the most as claimed in claim 2, it is characterised in that: described polyurethane outer, polyurethane internal layer thickness are 0.05-0.35mm, and polrvinyl chloride layer thickness is 0.1-0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520924739.1U CN205411754U (en) | 2015-11-19 | 2015-11-19 | Compound catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520924739.1U CN205411754U (en) | 2015-11-19 | 2015-11-19 | Compound catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205411754U true CN205411754U (en) | 2016-08-03 |
Family
ID=56534985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520924739.1U Expired - Fee Related CN205411754U (en) | 2015-11-19 | 2015-11-19 | Compound catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205411754U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200406019A1 (en) * | 2018-03-29 | 2020-12-31 | Ypsomed Ag | Multi-layer hose for an infustion set for dispensing a fluid |
| CN114196190A (en) * | 2021-12-22 | 2022-03-18 | 中为医疗科技(江苏)有限公司 | TPU-PVC medical catheter and preparation method thereof |
-
2015
- 2015-11-19 CN CN201520924739.1U patent/CN205411754U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200406019A1 (en) * | 2018-03-29 | 2020-12-31 | Ypsomed Ag | Multi-layer hose for an infustion set for dispensing a fluid |
| CN114196190A (en) * | 2021-12-22 | 2022-03-18 | 中为医疗科技(江苏)有限公司 | TPU-PVC medical catheter and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101537216B (en) | Safe infusion apparatus and preparation method thereof | |
| JP6203754B2 (en) | Multi-layer pipe | |
| CN205411754U (en) | Compound catheter | |
| CN101536961B (en) | Safe blood or blood component storage container and preparation method thereof | |
| Kolobow et al. | Comparison of a novel lycra endotracheal tube cuff to standard polyvinyl chloride cuff and polyurethane cuff for fluid leak prevention | |
| CN105327437A (en) | Hydrophilic type super-lubricity urinary catheter and preparation method thereof | |
| CN201855461U (en) | Hose for infusion devices, dropper for infusion devices and infusion device using same | |
| CN101962461B (en) | Phthalate-free medical polrvinyl chloride (PVC) plastic | |
| CN106178231A (en) | Medical double-deck high pressure resistant sacculus and preparation method thereof | |
| CN103768693A (en) | Anti-pollution double-layer airbag oral trachea cannula as well as preparation and application methods thereof | |
| CN102423508A (en) | Transfusion conduit of blood transfusion apparatus and preparation method thereof | |
| CN105327403A (en) | Compound type urinary catheter and processing technology thereof | |
| CN104582783A (en) | Multi-layered tubing | |
| CN202128807U (en) | Anti-bending multi-cavity telescoping pipe | |
| CN202010307U (en) | Double-layer composite bag-type infusion device | |
| CN201179270Y (en) | Medical transfusion composite tube | |
| CN205411891U (en) | Hydrophilic ultra -smooth catheter | |
| CN201235105Y (en) | Casing tube type safety thoracic-puncture emergency treatment needle for tension pneumothorax | |
| CN105999443A (en) | Urethral cathetermanufacturing method | |
| CN206631001U (en) | Medical double-deck high pressure resistant sacculus | |
| CN202086882U (en) | Light-proof non-PVC infusion apparatus | |
| CN215690863U (en) | High-hardness catheter with uniform plasticization | |
| CN111714744A (en) | Non-inflatable cuff and endotracheal intubation | |
| CN101502694A (en) | Method for setting balloon on tube body | |
| CN211434691U (en) | Anorectal surgery drug administration device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20211119 |