CN203493977U - Injector for flushing catheter - Google Patents
Injector for flushing catheter Download PDFInfo
- Publication number
- CN203493977U CN203493977U CN201320488954.2U CN201320488954U CN203493977U CN 203493977 U CN203493977 U CN 203493977U CN 201320488954 U CN201320488954 U CN 201320488954U CN 203493977 U CN203493977 U CN 203493977U
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- piston
- plunger
- injector
- hollow channel
- hollow passage
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Abstract
The utility model belongs to the field of medical instruments and particularly relates to an injector for flushing a catheter. The injector comprises a cylinder body, a core rod and a piston fixed to the top of the core rod, wherein a hollow passage is arranged in a connecting head at the end of the cylinder body; the piston comprises a conical part on the upper part and a sealing part on the lower part. The injector is characterized in that a plunger is arranged on the top of the piston and a clamping ring is arranged on the end, close to the piston, of the hollow passage corresponding to the plunger. The injector for flushing the catheter is simple and reasonable in structure and simple, convenient and quick in operation; due to the fact that the plunger on the top of the piston can be contacted and tightly occluded with the clamping ring in the hollow passage, the hollow passage is sealed, the piston is separated from the catheter, and blood reflowing caused by recoverable deformation of the piston is prevented; due to the fact that the occlusion between the piston and the hollow passage is increased through the clamping ring, the piston is prevented from being separated from the hollow passage and the sealing effect is guaranteed; the injector can be directly applied to clinic and can also be pre-filled with a fluid, such as normal saline and heparin solution, for flushing the catheter, and has a wide application range.
Description
Technical field
This utility model relates to a kind of catheters irrigation syringe, belongs to medical apparatus field.
Background technology
By Vein Tube, carrying out venous transfusion is widely used Therapeutic Method in clinical treatment, in the life cycle of Vein Tube, the probability that conduit stops up is up to 21%, the conduit wherein causing due to thrombosis stops up and is approximately 60%, serious conduit stops up will cause put conduit loss of function, and have to shift to an earlier date tube drawing, not only increased medical personnel's labor intensity, also to patient, cause extra financial burden.Clinical conventional catheters irrigation is common syringe at present, in use can produce the relevant blood back of syringe, the relevant blood back of syringe refers to that quality of rubber materials piston contacts with semi-rigid cartridge when syringe is used end, can there is deformation in piston, this deformation can be replied after core bar rear portion thrust disappears, thereby cylindrical shell hollow channel is produced to pumpback, thereby cause that blood is inhaled into conduit, solidify rear generation thrombosis.
People are studied the relevant blood back problem of syringe, developed the syringe that can prevent blood backflow, the mentality of designing of these products is mainly to suppress the reply phenomenon of piston deformation after propelling movement finishes, for example U.S. company BD development commodity are called the pre-filled catheter flusher of " happiness of PosiFlush good fortune come ", cardinal principle is to increase piston length, and then the frictional resistance of increase piston and syringe inner core tract, thereby prevent the resilience of piston after external force disappears, the deformation recovery of top land is suppressed.Except above-mentioned, by increasing resistance, prevent the technology of piston resilience, also develop in recent years other and suppressed the technology of piston resilience, for example Chinese patent 201220664327.5 discloses a kind of like this syringe, the patented product comprises cylindrical shell, the union joint of cylindrical shell end, be arranged on piston and the push rod being fixedly connected with piston in cylindrical shell, in cylindrical shell, near connector position, be provided with the locking piece that can prevent piston resilience, this locking piece can prevent the resilience of piston, can realize blood return prevention function like this, but in actual production, the cylindrical shell difficulty of processing that contains locking piece is very large, and the cooperation of cylindrical shell locking piece and piston is required strict, serviceability is stable not.
Utility model content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: provide a kind of simple in structure, easy to make and can realize the catheters irrigation syringe of blood return prevention function.
Catheters irrigation syringe described in the utility model, comprise cylindrical shell, the fixing piston of core bar and core bar top, the union joint inside of cylindrical shell end has hollow channel, piston comprises the tapered portion on top and the sealing of bottom, the top of piston is provided with plunger, and corresponding plunger arranges snap ring at the close piston end of hollow channel.
This syringe can be directly used in clinical, also can be pre-charged with the fluid that irrigating catheter is used, as injecting normal saline, heparin solution etc.In use, the union joint of cylindrical shell end is connected with conduit, works as infused, first the plunger of top land enters hollow channel, and along with the increase of penetration depth, snap ring in plunger and hollow channel comes in contact, and realizes the sealing to hollow channel, by piston and conduit isolation, the blood backflow of having avoided piston deformation recovery to cause, clasp design on hollow channel has increased the gmatjpdumamics of piston and hollow channel, avoids piston separated with hollow channel, has guaranteed sealing effectiveness.
The diameter of described plunger is from close piston end to reducing gradually away from piston end, and plunger is greater than the diameter of cylindrical shell hollow channel near the diameter of piston end, and plunger is less than the diameter of cylindrical shell hollow channel away from the diameter of piston end.When piston contacts with cylindrical shell, the plunger at its top enter hollow channel and gradually with hollow channel in the tight interlock of snap ring, realize sealing effectiveness.
Described snap ring height is 5-10 silk, and wherein, snap ring and cylindrical shell are one-body molded.
The height of the tapered portion of described piston is 2-5mm.The top design that piston is larger can prevent that it is not easy to occur deformation and reply in medicinal liquid infusion process, avoids causing blood backflow.
The beneficial effect that this utility model compared with prior art had is:
This catheters irrigation syringe construction advantages of simple, simple and efficient to handle, the plunger by top land can contact with the snap ring in hollow channel and closely interlock, thereby realizes the sealing to hollow channel, by piston and conduit isolation, the blood backflow of having avoided piston deformation recovery to cause; By snap ring, increase the gmatjpdumamics of piston and hollow channel, avoided piston separated with hollow channel, guaranteed sealing effectiveness; The top design that piston is larger can prevent that it is not easy to occur deformation and reply in medicinal liquid infusion process, avoids causing blood backflow; This syringe can be directly used in clinical, also can be pre-charged with the fluid that irrigating catheter is used, as injecting normal saline, heparin solution etc., applied range.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation after this utility model is used.
In figure: 1, plugging cap; 2, union joint; 3, hollow channel; 4, snap ring; 5, cylindrical shell; 6, plunger; 7, tapered portion; 8, sealing; 9, core bar.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1, syringe for this catheters irrigation, comprise cylindrical shell 5, the fixing piston of core bar 9 and core bar 9 tops, union joint 2 inside of cylindrical shell 5 ends have hollow channel 3, piston comprises the tapered portion 7 on top and the sealing 8 of bottom, the top of piston is provided with plunger 6, and corresponding plunger 6 arranges snap ring 4 at the close piston end of hollow channel 3.
Wherein: the diameter of plunger 6 is from close piston end to reducing gradually away from piston end, and plunger is greater than the diameter of hollow channel 3 near the diameter of piston end, and plunger is less than the diameter of hollow channel 3 away from the diameter of piston end; Snap ring 4 is one-body molded with cylindrical shell 5, and the height of snap ring 4 is 5-10 silk; The height of the tapered portion 7 of piston is 2-5mm; Union joint 2 overcoats of cylindrical shell 5 ends have plugging cap 1.
This syringe can be directly used in clinical, also can be pre-charged with the fluid that irrigating catheter is used, as injecting normal saline, heparin solution etc.In use, the union joint 2 of cylindrical shell 5 ends is connected with conduit, work as infused, first the plunger 6 of top land enters hollow channel 3, and along with the increase of penetration depth, plunger 6 comes in contact and then closely interlock with the snap ring 4 in hollow channel 3, as shown in Figure 2, thereby realize the sealing to hollow channel 3, by piston and conduit isolation, the blood backflow of having avoided piston deformation recovery to cause; Snap ring 4 designs on hollow channel 3 have increased the gmatjpdumamics of piston and hollow channel 3, avoid piston separated with hollow channel 3, have guaranteed sealing effectiveness; The top design that piston is larger can prevent that it is not easy to occur deformation and reply in medicinal liquid infusion process, avoids causing blood backflow.
Claims (4)
1. a catheters irrigation syringe, comprise cylindrical shell (5), the fixing piston of core bar (9) and core bar (9) top, union joint (2) inside of cylindrical shell (5) end has hollow channel (3), piston comprises the tapered portion (7) on top and the sealing (8) of bottom, it is characterized in that: the top of piston is provided with plunger (6), corresponding plunger (6) arranges snap ring (4) at the close piston end of hollow channel (3).
2. catheters irrigation syringe according to claim 1, it is characterized in that: the diameter of described plunger (6) is from close piston end to reducing gradually away from piston end, plunger is greater than the diameter of hollow channel (3) near the diameter of piston end, plunger is less than the diameter of hollow channel (3) away from the diameter of piston end.
3. catheters irrigation syringe according to claim 1 and 2, is characterized in that: described snap ring (4) is highly 5-10 silk.
4. catheters irrigation syringe according to claim 1 and 2, is characterized in that: the height of the tapered portion of described piston (7) is 2-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320488954.2U CN203493977U (en) | 2013-08-12 | 2013-08-12 | Injector for flushing catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320488954.2U CN203493977U (en) | 2013-08-12 | 2013-08-12 | Injector for flushing catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203493977U true CN203493977U (en) | 2014-03-26 |
Family
ID=50324988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320488954.2U Expired - Lifetime CN203493977U (en) | 2013-08-12 | 2013-08-12 | Injector for flushing catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203493977U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879146A (en) * | 2016-05-22 | 2016-08-24 | 江西三鑫医疗科技股份有限公司 | Portable low-residue blood-return-proof pre-flushing type disinfection syringe |
| CN108837236A (en) * | 2018-05-10 | 2018-11-20 | 山东威高集团医用高分子制品股份有限公司 | The pre-filled flushing syringe of anti-blood back |
| CN112426582A (en) * | 2020-04-23 | 2021-03-02 | 北京万生人和科技有限公司 | Flushing syringe |
| CN113857164A (en) * | 2021-09-29 | 2021-12-31 | 天津市中西医结合医院（天津市南开医院） | Pulse type device for automatically flushing central venous catheter and cleaning method thereof |
| CN115962995A (en) * | 2022-12-26 | 2023-04-14 | 中国科学院基础医学与肿瘤研究所(筹) | Full-automatic microbial staining film-making device |
-
2013
- 2013-08-12 CN CN201320488954.2U patent/CN203493977U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879146A (en) * | 2016-05-22 | 2016-08-24 | 江西三鑫医疗科技股份有限公司 | Portable low-residue blood-return-proof pre-flushing type disinfection syringe |
| CN108837236A (en) * | 2018-05-10 | 2018-11-20 | 山东威高集团医用高分子制品股份有限公司 | The pre-filled flushing syringe of anti-blood back |
| CN112426582A (en) * | 2020-04-23 | 2021-03-02 | 北京万生人和科技有限公司 | Flushing syringe |
| CN113857164A (en) * | 2021-09-29 | 2021-12-31 | 天津市中西医结合医院（天津市南开医院） | Pulse type device for automatically flushing central venous catheter and cleaning method thereof |
| CN115962995A (en) * | 2022-12-26 | 2023-04-14 | 中国科学院基础医学与肿瘤研究所(筹) | Full-automatic microbial staining film-making device |
| CN115962995B (en) * | 2022-12-26 | 2023-07-04 | 中国科学院基础医学与肿瘤研究所(筹) | Full-automatic microorganism dyeing film-making device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 255086 No. 999, Zunxian Road, high tech Zone, Zibo City, Shandong Province Patentee after: Shandong ande medical supplies Co.,Ltd. Address before: No.77, North Road, development zone, high tech Zone, Zibo City, Shandong Province Patentee before: SHINVA ANDE HEALTHCARE APPARATUS Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
|
| CX01 | Expiry of patent term |