CN103301551B - Wetting component for hydrophilic urinary catheter - Google Patents
Wetting component for hydrophilic urinary catheter Download PDFInfo
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- CN103301551B CN103301551B CN201310231294.4A CN201310231294A CN103301551B CN 103301551 B CN103301551 B CN 103301551B CN 201310231294 A CN201310231294 A CN 201310231294A CN 103301551 B CN103301551 B CN 103301551B
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- urinary catheter
- hydrophilic
- hydrophilic urinary
- connecting device
- trocar sheath
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/002—Packages specially adapted therefor ; catheter kit packages
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
- A61M2025/0046—Coatings for improving slidability
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Otolaryngology (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- External Artificial Organs (AREA)
Abstract
The invention discloses a wetting component for a hydrophilic urinary catheter, which comprises a wetting liquid container, a hydrophilic urinary catheter and an outer cannula; the hydrophilic coating of part of the urinary catheter, or the hydrophilic coating of all of the hydrophilic urinary catheter is sleeved with the outer cannula; an outlet which can switch from close state to open state is formed in the wetting liquid container; and the outlet of the wetting liquid container is communicated with the outer cannula through liquid. The wetting component for the hydrophilic urinary catheter is characterized in that the far-end port of the outer cannula is closed; and the gap between the inner wall of the outer cannula and the hydrophilic coating of the outer wall the hydrophilic urinary catheter is not higher than 2.0 mm. The wetting component for the hydrophilic urinary catheter can reduce the consumption of wetting liquid, shorten the wetting waiting time, lower the probability of sticking of the surface hydrophilic coating and the package, and reduce overflow of the wetting liquid.
Description
Technical field
The present invention relates to a kind of medical appliance, particularly relate to a kind of wetted components of hydrophilic urinary catheter.
Background technology
In urinary system in narrow or damage and the patient such as paralysis, extensively adopt batch (-type) to insert conduit voluntarily and carry out urethral catheterization, the daily live and work of patient can normally be carried out.The catheter that batch (-type) inserts voluntarily all needs to coat greasing substance on its inserting paragraph surface usually, to realize the surface lubrication of conduit inserting paragraph and lower coefficient of friction, improves the comfortableness inserted in urethra process.There is the surface lubrication that two kinds of different modes realize catheter insertion portion on the market at present.
One: insert section surface application of lubricating at catheter, lubricant and catheter surface adhere to (as vaseline, silicone oil) with physical adherence form, keeps surface lubrication effect under normal conditions always.But for hydrophilic coating technology, this employing lubricant applying mode carries out the method for surface lubrication, needs the amounts of lubrication of use comparatively large, is coated with simultaneously and not easily accomplishes evenly, conduit inserts and extracts in urethra process and causes a large amount of lubricant to remain in urethra, causes discomfort; The method of common application of lubricating cannot reach lower skin-friction coefficient than hydrophilic coating lubrication technology simultaneously.
Its two: catheter insert section surface coating hydrophilic coating material, this hydrophilic coating material and catheter surface are connected with more firmly chemical bond, in the time that coating is shorter after touching fountain solution, (several seconds is to several tens of seconds) can show stronger lubricant effect, greatly reduces the skin-friction coefficient of catheter.For the moistening of hydrophilic lubrication coating, there are two kinds of implementations more easily on the market: the first, packed together with fountain solution in air-locked packaging bag by this catheter with hydrophilic coating, what hydrophilic coating and fountain solution continued between the storage life keeps in touch.Which is owing to requiring that packaging material are airtight, can not eo sterilization be adopted, can only irradiation sterilization be adopted, therefore all higher to the requirement of packaging, conduit and coating material, because higher material cost causes too high product price, the cost of shipping storage is higher.After the main deficiency of this implementation is to open packaging, fountain solution easily overflows, and makes troubles, easily cause the pollution of environment at one's side simultaneously to use.The second, the deficiency occurred in order to avoid the first implementation method (material cost high, fountain solution overflow), have employed the moistening that special structural design and operational approach realize hydrophilic coating.Main implementation method is: with fountain solution storage encapsulation fountain solution, hydrophilic urinary catheter pipe and fountain solution storage are packaged together in packaging bag, fountain solution storage is opened by applying external force during use, fountain solution flows out in packaging bag, hydrophilic urinary catheter inserting paragraph is soaked the regular hour in fountain solution (the general recommendation time is for being no less than 30s), then take packaging bag apart and take out hydrophilic urinary catheter, now hydrophilic urinary catheter surface becomes lubricating status, can cosily use.Second method achieves than first method and lowers packaging material cost, decrease fountain solution and overflow the risk causing environmental pollution, but still come with some shortcomings under actual state, such as, being dipped into make fountain solution that catheter is whole can inserting paragraph, still need relatively large fountain solution, the size of inserting paragraph packaging inner chamber can realize reducing the demand of fountain solution although also have at present by narrowing catheter, but reduce the DeGrain of fountain solution, and easily cause catheter surface and packaging bag to bond not to be drawn out easily; And for example, hydrophilic urinary catheter inserting paragraph soaks the regular hour in fountain solution, and extend the operation waiting time, patient can not be used in emergency situations fast, causes inconvenience to a certain degree.
To sum up analyze the catheter lubrication form of two kinds of main flows, compared for the moistening implementation of two kinds of hydrophilic urinary catheter pipes simultaneously.Large with regard to the fountain solution consumption that exists in the second way that the moistening of hydrophilic urinary catheter pipe realizes, action need is waited for, easily cause coating surface and packaging to bond and the deficiency such as fountain solution spilling, the invention provides a kind of moistening implementation of hydrophilic urinary catheter pipe, can effectively for hydrophilic coating lubricate catheter carries out moistening while avoiding above-mentioned deficiency.
Summary of the invention
The object of this invention is to provide and a kind ofly reduce fountain solution consumption, reduce the moistening waiting time, reduce surface hydrophilic coating and packaging and to bond the wetted components of hydrophilic urinary catheter that probability and fountain solution overflow.
For achieving the above object, the invention provides a kind of wetted components of hydrophilic urinary catheter, comprise fountain solution storage, hydrophilic urinary catheter and trocar sheath, on the hydrophilic coating that described trocar sheath is enclosed within part hydrophilic urinary catheter or trocar sheath be enclosed within the hydrophilic coating of whole hydrophilic urinary catheter, described fountain solution storage has the outlet that can turn to opening from closed condition, outlet and the described trocar sheath of described fountain solution storage keep liquid to communicate, the remote port of described trocar sheath is closed, gap between the hydrophilic coating of described outer sleeve inner wall and described hydrophilic urinary catheter outer wall is not more than 2.0mm.
Preferably, described trocar sheath is that a length can the long micropipe of holding portion or whole hydrophilic coating length of hydrophilic urinary catheter.
Preferably, described trocar sheath near-end is provided with connecting device, and the outlet of described fountain solution storage is communicated with described trocar sheath liquid by described connecting device.
Preferably, described connecting device and described trocar sheath one-body molded, or described connecting device is to paste or the form of frictional fit is supported on described trocar sheath.
Preferably, described hydrophilic urinary catheter near-end is provided with sheath.
Preferably, described fountain solution storage is all or part of is contained in described sheath.
Preferably, the gap between described outer sleeve inner wall and the hydrophilic coating of hydrophilic urinary catheter forms liquid by described hydrophilic urinary catheter inner chamber with the outlet of described fountain solution storage and communicates.
Preferably, described hydrophilic urinary catheter near-end is provided with hydrophilic urinary catheter joint, and described hydrophilic urinary catheter joint is provided with connecting device, and described fountain solution storage is communicated by described connecting device and described hydrophilic urinary catheter joint liquid.
Preferably, described connecting device and described hydrophilic urinary catheter joint one-body molded, or described connecting device is to paste or the form of frictional fit is supported on described hydrophilic urinary catheter joint.
Preferably, described connecting device is a urine drainage bag.
Compared with prior art, the beneficial effect of the wetted components of hydrophilic urinary catheter of the present invention is as follows:
(1) because the remote port of described trocar sheath is closed, gap between the hydrophilic coating of described outer sleeve inner wall and described hydrophilic urinary catheter outer wall is not more than 2.0mm, thus decrease the hydrophilic coating on described hydrophilic urinary catheter surface and the adhesion probability of moistening acceptance region, hydrophilic coating is played a protective role; Simultaneously because fountain solution realizes and fully the contacting of the hydrophilic coating of hydrophilic urinary catheter in limited space, the consumption of fountain solution can be made to be less than 8ml, reduce the use amount of fountain solution, fountain solution is utilized more fully, because this reducing the fountain solution of required storage in fountain solution storage, decrease the moistening waiting time simultaneously; Owing to decreasing the use amount of fountain solution, the probability that fountain solution overflows also reduces greatly, thus improves the convenient and safety using operation containing hydrophilic lubrication catheter further.
(2) owing to being provided with described connecting device, the liquid realized between described fountain solution storage and described trocar sheath by described connecting device is communicated, thus can ensure the gap that can flow into smoothly after fountain solution in described fountain solution storage is discharged between the outer wall hydrophilic coating of described outer sleeve inner wall and described hydrophilic urinary catheter.
(3) be contained in described sheath because described fountain solution storage is wholly or partly, thus the length of described connecting device can be reduced, thus shorten the length of the wetted components packaging of whole hydrophilic urinary catheter, thus reduce material cost further, improve the portable degree of product.
(4) because described connecting device is a urine drainage bag, thus may be used for collecting the urine derived, thus can prevent urine from overflowing contaminated environment.
By following description also by reference to the accompanying drawings, the present invention will become more clear, and these accompanying drawings are for explaining embodiments of the invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of wetted components first embodiment of hydrophilic urinary catheter of the present invention.
Fig. 2 is the schematic diagram of wetted components second embodiment of hydrophilic urinary catheter of the present invention.
Fig. 3 is the schematic diagram of wetted components the 3rd embodiment of hydrophilic urinary catheter of the present invention.
Fig. 4 is the schematic diagram of wetted components the 4th embodiment of hydrophilic urinary catheter of the present invention.
Detailed description of the invention
With reference now to accompanying drawing, describe embodiments of the invention, element numbers similar in accompanying drawing represents similar element.
First embodiment
Be illustrated in figure 1 the first embodiment of the present invention, the wetted components of described hydrophilic urinary catheter comprises fountain solution storage 100, hydrophilic urinary catheter 200 and trocar sheath 300, fountain solution storage 100, hydrophilic urinary catheter 200 and trocar sheath 300 are all placed in outer package 600 and form entirety.Fountain solution in fountain solution storage 100 is water or normal saline, adopts high pressure steam sterilization, sterile packaged.Outer package 600 is made by the flexible material penetrating gas, and outer package 600 can pass through ethylene oxide gas, and whole internal part is sterilized, thus reduces sterilization, transport and carrying cost.
Hydrophilic urinary catheter 200 insertion portion is accommodated in trocar sheath 300, the internal diameter of trocar sheath 300 is slightly larger than hydrophilic urinary catheter insertion portion external diameter, the gap between trocar sheath 300 inwall and the hydrophilic coating of described hydrophilic urinary catheter 200 outer wall is kept to be not more than 2.0 millimeters, as the present embodiment adopt trocar sheath 300 inwall and as described in hydrophilic urinary catheter 200 outer wall hydrophilic coating between gap be 0.8 millimeter, certainly, also the gap between the hydrophilic coating of trocar sheath 300 inwall and described hydrophilic urinary catheter 200 outer wall can be adopted as required to be 0.1 millimeter, 0.2 millimeter, 0.5 millimeter, 1.3 millimeter, 1.7 millimeters or 2.0 millimeters etc.Hydrophilic urinary catheter 200 insertion portion typical length is the special 80-140mm of women, the special 200-350mm of male, and corresponding trocar sheath 300 should be equal or slightly long with the hydrophilic urinary catheter 200 insertion portion length of correspondence storage.
Fountain solution storage 100 is partly accommodated in sheath 500 with the hydrophilic urinary catheter joint 201 of hydrophilic urinary catheter 200, by connecting device 400, sheath 500 is connected with trocar sheath 300.Trocar sheath near-end 301 in connecting device 400 opens a top end opening and a lateral opening.Trocar sheath 300, connecting device 400 and sheath 500 all adopt PVC material to make, and trocar sheath 300 is connected with heat seal form or nested form with connecting device 400, and sheath 500 is connected with frictional fit form with connecting device 400.Fountain solution storage 100 is provided with outlet 101, and outlet 101 is communicated with trocar sheath 300 liquid by connecting device 400.
During use, keep outer package 600 intact, apply pre-conditioned with hands to fountain solution storage 100, the outlet 101 of fountain solution storage just can be broken, fountain solution is expelled to rapidly connecting device 400, fountain solution enters the gap between the hydrophilic coating of trocar sheath 300 inwall and hydrophilic urinary catheter 200 insertion portion outer wall by trocar sheath near-end 301 lateral opening, hydrophilic urinary catheter 200 surface lubrication can be made by quick humidification hydrophilic coating, now can take outer package 600 apart, hand-held hydrophilic urinary catheter joint 201 or sheath 500, hydrophilic urinary catheter 200 is taken out use, due to hydrophilic urinary catheter 200 surface lubrication, thus improve the comfortableness that hydrophilic urinary catheter 200 inserts human urethra.
Second embodiment
Be illustrated in figure 2 the second embodiment of the present invention, the difference of this embodiment and the first embodiment above-mentioned is: fountain solution storage 100 is partly accommodated in connecting device 400, hydrophilic urinary catheter joint 201 is all accommodated in sheath 500, and fountain solution storage 100 is connected with trocar sheath 300 by connecting device 400.Trocar sheath near-end 301 in connecting device 400 opens a top end opening and a lateral opening.The using method of this embodiment is identical with the using method of the first embodiment above-mentioned, therefore does not repeat.
3rd embodiment
Be illustrated in figure 3 the third embodiment of the present invention, the difference of this embodiment and the first embodiment above-mentioned is: fountain solution storage 100 and hydrophilic urinary catheter joint 201 are all accommodated in connecting device 400, and the trocar sheath near-end 302 in connecting device 400 opens a top end opening and a lateral opening.
During use, keep outer package 600 intact, apply pre-conditioned with hands to fountain solution storage 100, the outlet 101 of fountain solution storage just can be broken, fountain solution is expelled to rapidly connecting device 400, fountain solution enters the gap between the hydrophilic coating of trocar sheath 300 inwall and hydrophilic urinary catheter 200 insertion portion outer wall by trocar sheath near-end 301 lateral opening, moistening hydrophilic coating makes hydrophilic urinary catheter 200 lubricate, now can take outer package 600 apart, hand-held hydrophilic urinary catheter joint 201, takes out use by hydrophilic urinary catheter 200.
4th embodiment
Be illustrated in figure 4 the 4th kind of embodiment of the present invention, the difference of this embodiment and the first embodiment above-mentioned is: fountain solution storage 100 is all accommodated in connecting device 400, connecting device 400 is connected with hydrophilic urinary catheter joint 201 and keeps liquid communication, and the gap between the hydrophilic coating of trocar sheath 300 inwall and hydrophilic urinary catheter 200 and hydrophilic urinary catheter 200 inner chamber keep liquid communication.Sheath 500 is arranged on outside hydrophilic urinary catheter joint 201, also can not have sheath 500.Connecting device 400 and hydrophilic urinary catheter joint 201 form one, and keep liquid communication, and fountain solution storage 100 is packed in downlink connection device 400.
During use, apply pre-conditioned across connecting device 400 to fountain solution storage 100, after outlet 101 unlatching of fountain solution storage, fountain solution is discharged, the gap between hydrophilic urinary catheter 200 inner chamber arrival trocar sheath 300 inwall and the hydrophilic coating of hydrophilic urinary catheter 200 outer wall is flowed through by hydrophilic urinary catheter joint 201, moistening hydrophilic urinary catheter 200, hydrophilic urinary catheter 200 is lubricated, now open outer package 600, take out hydrophilic urinary catheter 200, connecting device 400 just becomes urine drainage bag, for collecting the urine of derivation.
More than in conjunction with most preferred embodiment, invention has been described, but the present invention is not limited to the embodiment of above announcement, and should contain various carry out according to essence of the present invention amendment, equivalent combinations.
Claims (8)
1. the wetted components of a hydrophilic urinary catheter, comprise fountain solution storage, hydrophilic urinary catheter and trocar sheath, on the hydrophilic coating that described trocar sheath is enclosed within part hydrophilic urinary catheter or trocar sheath be enclosed within the hydrophilic coating of whole hydrophilic urinary catheter, described fountain solution storage has the outlet that can turn to opening from closed condition, outlet and the described trocar sheath of described fountain solution storage keep liquid to communicate, it is characterized in that: the remote port of described trocar sheath is closed, gap between the hydrophilic coating of described outer sleeve inner wall and described hydrophilic urinary catheter outer wall is not more than 2.0mm, described hydrophilic urinary catheter is connected with hydrophilic urinary catheter joint, described hydrophilic urinary catheter near-end is provided with sheath, the hydrophilic urinary catheter joint of described hydrophilic urinary catheter is partly accommodated in sheath, or the arranged outside sheath of the hydrophilic urinary catheter joint of described hydrophilic urinary catheter.
2. the wetted components of hydrophilic urinary catheter as claimed in claim 1, is characterized in that: described trocar sheath is that a length can the long micropipe of holding portion or whole hydrophilic coating length of hydrophilic urinary catheter.
3. the wetted components of hydrophilic urinary catheter as claimed in claim 1 or 2, it is characterized in that: described trocar sheath near-end is provided with connecting device, the outlet of described fountain solution storage is communicated with described trocar sheath liquid by described connecting device, connecting device makes sheath be connected with trocar sheath, and the trocar sheath near-end in connecting device opens a top end opening and a lateral opening.
4. the wetted components of hydrophilic urinary catheter as claimed in claim 3, is characterized in that: described connecting device and described trocar sheath one-body molded, or described connecting device is to paste or the form of frictional fit is supported on described trocar sheath.
5. the wetted components of hydrophilic urinary catheter as claimed in claim 1 or 2, is characterized in that: the gap between described outer sleeve inner wall and the hydrophilic coating of hydrophilic urinary catheter forms liquid by described hydrophilic urinary catheter inner chamber with the outlet of described fountain solution storage and communicates.
6. the wetted components of hydrophilic urinary catheter as claimed in claim 5, it is characterized in that: described hydrophilic urinary catheter near-end is provided with hydrophilic urinary catheter joint, described hydrophilic urinary catheter joint is provided with connecting device, and described fountain solution storage is communicated by described connecting device and described hydrophilic urinary catheter joint liquid.
7. the wetted components of hydrophilic urinary catheter as claimed in claim 6, it is characterized in that: described connecting device and described hydrophilic urinary catheter joint one-body molded, or described connecting device is to paste or the form of frictional fit is supported on described hydrophilic urinary catheter joint.
8. the wetted components of hydrophilic urinary catheter as claimed in claims 6 or 7, is characterized in that: described connecting device is a urine drainage bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310231294.4A CN103301551B (en) | 2013-06-09 | 2013-06-09 | Wetting component for hydrophilic urinary catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310231294.4A CN103301551B (en) | 2013-06-09 | 2013-06-09 | Wetting component for hydrophilic urinary catheter |
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| Publication Number | Publication Date |
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| CN103301551A CN103301551A (en) | 2013-09-18 |
| CN103301551B true CN103301551B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310231294.4A Active CN103301551B (en) | 2013-06-09 | 2013-06-09 | Wetting component for hydrophilic urinary catheter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789290A (en) * | 2016-09-27 | 2019-05-21 | 科洛普拉斯特公司 | Hydration conduit with casing |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10758704B2 (en) | 2015-06-26 | 2020-09-01 | Coloplast A/S | Urinary catheter assembly |
| CN106215303A (en) * | 2016-10-11 | 2016-12-14 | 江苏苏云医疗器材有限公司 | UV solidifies coating catheter |
| EP3421071B1 (en) * | 2017-06-30 | 2023-09-20 | Wellspect AB | Steam sterilized catheter assembly and method of producing thereof |
| DK180417B1 (en) | 2018-07-20 | 2021-04-22 | Coloplast As | INTERMITTING URINCATHER FITTING |
| CN109200431A (en) * | 2018-10-31 | 2019-01-15 | 绍兴麦杰新材料股份有限公司 | A kind of pre- envelope formula solution packaging and portable hydrophilic catheter |
| EP3897480B1 (en) | 2018-12-20 | 2025-02-26 | Coloplast A/S | Urine collecting bag |
| WO2021092388A1 (en) * | 2019-11-08 | 2021-05-14 | Hollister Incorporated | Methods of making sleeved and packaged hydrophilic catheter assemblies |
| CN113633832A (en) * | 2021-08-03 | 2021-11-12 | 广州维力医疗器械股份有限公司 | Method for manufacturing ureteral stent anti-crusting coating based on anionic resin |
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| AU710966B2 (en) * | 1996-11-01 | 1999-09-30 | Coloplast A/S | A urinary catheter assembly with a ready-to-use catheter |
| EP2468346B1 (en) * | 2010-12-22 | 2020-11-04 | Dentsply IH AB | Catheter assembly and a method and system for producing such an assembly |
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| CN1564699A (en) * | 2002-04-30 | 2005-01-12 | 艾斯特勒科技公司 | Catheter assembly |
| EP2545952A1 (en) * | 2011-07-15 | 2013-01-16 | Dentsply IH AB | Medical device assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109789290A (en) * | 2016-09-27 | 2019-05-21 | 科洛普拉斯特公司 | Hydration conduit with casing |
| CN109789290B (en) * | 2016-09-27 | 2021-08-03 | 科洛普拉斯特公司 | Hydration catheter with cannula |
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| Publication number | Publication date |
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| CN103301551A (en) | 2013-09-18 |
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Effective date of registration: 20180308 Address after: No. 7, yuyifeng Road, Zhangjiagang Economic Development Zone, Suzhou, Jiangsu Patentee after: Zhangjiagang Shagong Medical Technology Development Co., Ltd. Address before: 511434 Guangdong city of Guangzhou province Panyu District Hualong Town Jinhu Industrial Zone C4 Patentee before: Guangzhou Well Lead Medical Instruments Co., Ltd. |
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