CN109758639B - Anti-reflux exhaust type indwelling needle - Google Patents
Anti-reflux exhaust type indwelling needle Download PDFInfo
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- CN109758639B CN109758639B CN201910156438.1A CN201910156438A CN109758639B CN 109758639 B CN109758639 B CN 109758639B CN 201910156438 A CN201910156438 A CN 201910156438A CN 109758639 B CN109758639 B CN 109758639B
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Abstract
本发明涉及一种抗返流可排气型留置针，包括留置针主体、连接管和进液三通管，其特征在于：所述连接管上设有排气装置和抗返流开关装置。本发明结构巧妙，设计合理，通过在留置针主体的连接管上设置排气装置和抗返流开关装置，排气装置可以将进入留置针内的空气排出，避免出现空气进入静脉情况的出现，减少医疗纠纷，使患者无心理压力。在不进行静脉输液时可以将抗返流开关装置打开，使血液不会倒流，增加留置针的使用时间，减少血栓的形成。
The present invention relates to an anti-reflux exhaustable indwelling needle, comprising an indwelling needle body, a connecting tube and a liquid inlet three-way tube, characterized in that an exhaust device and an anti-reflux switch device are provided on the connecting tube. The present invention has an ingenious structure and a reasonable design. By arranging an exhaust device and an anti-reflux switch device on the connecting tube of the indwelling needle body, the exhaust device can exhaust the air entering the indwelling needle, avoid the occurrence of air entering the vein, reduce medical disputes, and relieve patients of psychological pressure. When intravenous infusion is not performed, the anti-reflux switch device can be turned on to prevent blood from flowing back, increase the use time of the indwelling needle, and reduce the formation of thrombus.
Description
Technical Field
The invention relates to an indwelling needle, in particular to an anti-reflux and exhaust type indwelling needle, and belongs to the technical field of medical equipment.
Background
The use of the venous indwelling needle can reduce the pain of a patient caused by repeated puncture and protect venous vessels, but after the conventional indwelling needle is placed, if air enters the indwelling needle, the air cannot be discharged, and bubbles enter the vein to cause bad influence on the psychological state of the patient, so that medical disputes are caused. At present, the self-protection consciousness of the patient is continuously enhanced, and the service requirement on medical care is also higher and higher. Patients often call nurses to remove bubbles, and even if the soil protection explains that small bubbles have no effect on human bodies, the patients are difficult to understand, and sometimes the patients need to replace a new infusion set and puncture veins again. And although a trace amount of air enters human bodies, serious physiological dysfunction is not caused, the air enters human bodies during transfusion, which is not allowed by the operation regulations. Some patients may present a series of problems in this regard, causing medical disputes. Therefore, the small amount of air is reduced to enter the blood vessel during transfusion, so that the occurrence of medical disputes is reduced.
In addition, because the indwelling needle is indwelled in a blood vessel of a patient, along with the limb movement of the patient, the situation that blood flows back into the indwelling needle frequently occurs clinically, thrombus is possibly formed, the indwelling needle cannot be used, puncture needs to be carried out again, more pain is brought to the patient, and the workload of medical staff is increased. The anti-backflow switch device is arranged at the top end of the indwelling needle, so that blood can not flow backwards, the service life of the indwelling needle can be prolonged, and the formation of thrombus can be reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the anti-reflux exhaust type indwelling needle which is ingenious in structure and reasonable in design, can effectively exhaust air, can prevent blood from flowing backwards, and reduces the workload of nurses.
According to the technical scheme, the anti-reflux exhaust type indwelling needle comprises an indwelling needle main body, a connecting pipe and a liquid inlet three-way pipe and is characterized in that an exhaust device and an anti-reflux switch device are arranged on the connecting pipe.
The exhaust device comprises a shell, a support, an exhaust filter membrane, a liquid inlet pipe and a liquid outlet pipe, wherein the shell is of a hollow flat shape, a liquid inlet pipe and a liquid outlet pipe mounting hole which are communicated with an inner cavity space of the shell are formed in the peripheral wall of the shell, a liquid inlet through hole is formed in the center of the liquid inlet pipe, the support is arranged in the inner cavity of the shell, the support comprises an annular outer ring and an annular inner ring, two ends of the annular outer ring are tightly abutted against two side walls of the shell and are in sealing connection, a first flow gap is reserved between the outer peripheral surface of the annular outer ring and the inner surface of the peripheral wall of the shell, a plurality of first liquid inlet holes which are communicated with the first flow gap are formed in the peripheral wall of the annular outer ring at intervals, a plurality of second flow gaps are reserved between the outer surface of the annular inner ring and the outer ring, a plurality of second liquid inlet holes which are communicated with the second flow gaps are formed in the peripheral wall of the annular inner ring at intervals, the annular inner ring and the liquid outlet through holes are formed in the peripheral wall of the annular inner ring in a staggered distribution mode, a plurality of first liquid inlet holes are formed in the peripheral direction, a plurality of the liquid outlet holes are formed in the peripheral wall of the annular inner ring and are arranged along the annular inner ring and the annular inner ring, a plurality of first liquid inlet holes are communicated with the inner ring, a liquid outlet hole is arranged in the annular inner ring and the annular inner ring, and the liquid outlet hole is arranged in the annular inner hole, and is correspondingly arranged in the annular inner hole, and the liquid outlet hole is correspondingly arranged in the annular inner hole, and is arranged in the annular inner hole, and penetrates through the annular inner hole, and through hole, and is arranged in and has and through hole.
As a further improvement of the present invention, the side wall of the housing provided with the air outlet is provided in a drum convex shape, and the air outlet is provided in a center position of the drum convex side wall.
As a further improvement of the present invention, the outer surface of the annular outer ring and/or the inner surface of the annular inner ring are incorporated with a particulate filtration membrane.
As a further improvement of the invention, the shell comprises a shell body and a shell upper cover, a connecting groove is arranged at the opening of the shell body, a connecting convex ring is arranged at the edge of the shell upper cover, and the connecting convex ring is embedded in the connecting groove.
As a further development of the invention, the width of the first flow gap is greater than the width of the second flow gap.
As a further improvement of the invention, the first flow gap is 1-2mm and the second flow gap is 0.5-2mm.
As a further improvement of the invention, the anti-backflow switch device comprises a switch seat, a switch rod and a switch knob, wherein a through groove is arranged in the switch seat, the connecting pipe is arranged in the through groove in a penetrating way, a push rod cavity which is vertical to the through groove and is mutually communicated with the through groove is arranged beside the through groove, the switch rod is arranged in the push rod cavity in a threaded way, the switch knob is arranged at the tail end of the switch rod, and the head end of the switch rod faces the connecting pipe.
Compared with the prior art, the invention has the following advantages:
1) The invention has smart structure and reasonable design, and the exhaust device and the anti-reflux switch device are arranged on the connecting pipe of the detained needle main body, so that the exhaust device can exhaust the air entering the detained needle, avoid the occurrence of the condition that the air enters a vein, reduce medical disputes and lead patients to have no psychological pressure. When the intravenous transfusion is not performed, the anti-reflux switch device can be opened, so that blood can not flow backwards, the service time of the indwelling needle is prolonged, and the thrombus is reduced.
2) The exhaust device has ingenious structure, when the liquid medicine flows through the exhaust device, bubbles in the liquid medicine can be automatically collected and brought into the annular inner ring due to capillary phenomenon in the flowing process of the liquid medicine, and the liquid medicine is discharged through the exhaust filter membrane at the exhaust port after entering the inner space of the annular inner ring, so that the exhaust is convenient, quick and efficient.
3) The anti-backflow switch can effectively clamp the connecting pipe, prevent backflow, is firm in locking and cannot be opened accidentally.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of the structure of the exhaust apparatus in fig. 1.
Fig. 3 is a cross-sectional view taken along A-A in fig. 2.
Fig. 4 is an exploded view of the exhaust apparatus of fig. 2.
Fig. 5 is an enlarged cross-sectional view of the structure of the anti-reflux switch device of fig. 1.
The reference numerals indicate a 1-indwelling needle main body, a 2-connecting pipe, a 3-liquid inlet three-way pipe, a 4-exhaust device, a 4.1-housing, a 4.1.1-housing body, a 4.1.1 a-connecting groove, a 4.1.2-housing upper cover, a 4.1.2 a-connecting convex ring, a 4.1 a-exhaust port, a 4.2-bracket, a 4.2.1-annular outer ring, a 4.2.2-annular inner ring, a 4.2.3-first flow gap, a 4.2.4-first liquid inlet, a 4.2.5-second flow gap, a 4.2.6-second liquid inlet, a 4.3-exhaust filter membrane, a 4.4-liquid inlet pipe, a 4.4 a-liquid outlet pipe, a 4.5 a-liquid outlet through hole, a 5-backflow-preventing switch device, a 5.1-switch seat, a 5.1a through groove, a 5.1 b-push rod cavity, a 5.2-switch rod, a 5.3-switch knob and a 6-particle filter membrane.
Detailed Description
The invention will be further described with reference to the following specific drawings and examples.
As shown in fig. 1, the embodiment discloses an anti-reflux and exhaust type indwelling needle, which comprises an indwelling needle main body 1, a connecting pipe 2 and a liquid inlet three-way pipe 3, wherein an exhaust device 4 and an anti-reflux switch device 5 are arranged on the connecting pipe 2. Through setting up exhaust apparatus 4, can be with getting into the air discharge of keeping somewhere in the needle, avoid appearing the appearance that the air got into the vein condition, reduce medical disputes, make the patient have no psychological pressure. By arranging the anti-reflux switch device 5, the anti-reflux switch device 5 can be opened when venous transfusion is not performed, so that blood can not flow backwards, the service time of the indwelling needle is prolonged, and the formation of thrombus is reduced.
The exhaust device 4 of the present invention may employ a component having an exhaust function, such as a precision chemical filter having an exhaust function, which is conventional in the art. However, the existing precise liquid medicine filter mainly has the functions of filtering particles in liquid medicine, and according to the design principle, the section of the precise liquid medicine filter is larger than the section of a transfusion tube, so that after the liquid medicine flows into the precise liquid medicine filter, the flow speed is reduced, the pressure is reduced, the force of the liquid medicine pushing the filter membrane is reduced, and the particles in the liquid medicine are blocked by the filter membrane under a certain pressure condition, so that the particles are prevented from entering human bodies. If the precise liquid medicine filter is adopted as the exhaust device 4, because air occupies the space in the precise liquid medicine filter, the area of the liquid medicine passing through the filter membrane in the precise liquid medicine filter is reduced, the passing speed of the precise liquid medicine filter is increased, the design requirement is reduced, the effect of the precise liquid medicine filter is reduced, and partial particles can enter human bodies through the filter membrane 6, so that harm is brought to patients.
In order to overcome the defects of the existing precise liquid medicine filter, the embodiment provides an exhaust device 4 shown in fig. 2-4, which comprises a shell 4.1, a bracket 4.2, an exhaust filter membrane 4.3, a liquid inlet pipe 4.4 and a liquid outlet pipe 4.5; the shell 4.1 is hollow and flat, a liquid inlet pipe 4.4 and a liquid outlet pipe mounting hole which are communicated with the inner cavity space of the shell 4.1 are arranged on the peripheral wall of the shell 4.1, and a liquid inlet through hole 4.4a is arranged in the center of the liquid inlet pipe 4.4; the support 4.2 is arranged in the inner cavity of the shell 4.1, the support 4.2 comprises an annular outer ring 4.2.1 and an annular inner ring 4.2.2, two ends of the annular outer ring 4.2.1 are tightly abutted against and in sealing connection with two side walls of the shell 4.1, a first flowing gap 4.2.3 is reserved between the outer peripheral surface of the annular outer ring 4.2.1 and the inner surface of the peripheral wall of the shell 4.1, and a plurality of first liquid inlets 4.2.4 communicated with the first flowing gap 4.2.3 are arranged on the peripheral wall of the annular outer ring 4.2.1 at intervals; the annular inner ring 4.2.2 is concentrically arranged in the annular outer ring 4.2.1, a second flowing gap 4.2.5 is reserved between the outer surface of the annular inner ring 4.2.2 and the outer surface of the annular outer ring 4.2.1, a plurality of second liquid inlets 4.2.6 communicated with the second flowing gap 4.2.5 are arranged on the peripheral wall of the annular inner ring 4.2.2 at intervals, a plurality of second liquid inlets 4.2.6 and a plurality of first liquid inlets 4.2.4 are distributed in a staggered manner in the circumferential direction, the liquid outlet pipes 4.5 are integrally connected with the annular outer ring 4.2.1 and the annular inner ring 4.2.2 along the radial direction of the annular outer ring 4.2.1 and the annular inner ring 4.2.2, the outer part of the liquid outlet pipe 4.5 penetrates through a liquid outlet pipe mounting hole arranged on the shell 4.1, a liquid outlet through hole 4.5a is arranged in the center of the liquid outlet pipe 4.5, the inner end of the liquid outlet through hole 4.5a is communicated with the inner space of the annular inner ring 4.2.2.2, a part corresponding to the inner space of the annular inner ring 4.2.2 is arranged on the side wall of the shell 4.1, the exhaust filter membrane 4.3 is arranged at the exhaust port 4.1 a.
When the device is used, the surface of the shell 4.1 with the exhaust port 4.1a faces upwards, liquid medicine flows into the shell 4.1 through the liquid inlet through hole 4.4a and is distributed in the first flowing gap 4.2.3, then flows into the first flowing gap 4.2.5 through the first liquid inlet 4.2.4, and flows into the inner space of the annular inner ring 4.2.2 from the second liquid inlet 4.2.6. In this process, because a plurality of second inlet 4.2.6 and a plurality of first inlet 4.2.4 are crisscross the setting in circumference, bubble in the liquid medicine can be collected and carried into annular inner circle 4.2.2 automatically because of capillary phenomenon when the liquid medicine circulate, discharge through the exhaust filter membrane 4.3 of gas vent 4.1a department after entering annular inner circle 4.2.2's inner space, and the exhaust is convenient, swift, high-efficient.
As shown in fig. 2 and 4, in the present embodiment, the side wall of the housing 4.1 provided with the air outlet 4.1a is configured as a convex shape, and the air outlet 4.1a is disposed at the center of the convex side wall. So set up, because air density is less than liquid, can be located annular inner circle 4.2.2 inner space's upper portion after the air is assembled in annular inner circle 4.2.2, and above-mentioned low central high structure all around collects the air more easily, also provides reasonable structure guarantee for the smooth discharge of air.
In this embodiment, as shown in FIG. 3, the fine particle filtration membrane 6 is bonded to the outer surface of the annular outer ring 4.2.1. By the arrangement, the exhaust device 4 also has the function of filtering particles, so that the infusion safety is improved. In actual production, the fine particle filtration membrane 6 may be bonded to the inner surface of the annular inner ring 4.2.2. The manner of bonding the fine particle filtration membrane 6 to the annular outer ring 4.2.1 and the annular inner ring 4.2.2 may be adhesion or welding.
As shown in fig. 2 and 4, in this embodiment, the housing 4.1 includes a housing body 4.1.1 and a housing upper cover 4.1.2, a connection groove 4.1.1a is disposed at an opening of the housing 4.1, a connection flange 4.1.2a is disposed at an edge of the housing upper cover 4.1.2, and the connection flange 4.1.2a is engaged in the connection groove 4.1.1 a. So set up, casing body 4.1.1 and casing upper cover 4.1.2 assembly can be more accurate, and sealing performance after the connection is also better.
In this embodiment, as shown in fig. 3, the width of the first flow gap 4.2.3 is greater than the width of the second flow gap 4.2.5. By the arrangement, bubbles in the flowing process of the liquid medicine can be gradually collected in the order from large to small, so that air is discharged more efficiently. The first flow gap 4.2.3 is 1-2mm, preferably 1.5mm, and the second flow gap 4.2.5 is 0.5-2mm, preferably 1mm.
The anti-reflux switch device 5 of the present invention may employ a component having a shut-off function, such as a governor, which is conventional in the art. However, the existing speed regulator has the problem of unstable locking, and can be opened accidentally, so that the anti-backflow function cannot be realized.
In order to overcome the above-mentioned drawbacks of the existing speed regulator, this embodiment provides an anti-backflow switch device 5 as shown in fig. 5, which includes a switch seat 5.1, a switch rod 5.2 and a switch knob 5.3, wherein a through groove 5.1a is provided in the switch seat 5.1, the connecting pipe 2 is arranged in the through groove 5.1a in a penetrating manner, a push rod cavity 5.1b which is perpendicular to and mutually communicated with the through groove 5.1a is provided beside the through groove 5.1a, the switch rod 5.2 is installed in the push rod cavity 5.1b in a threaded manner, the switch knob 5.3 is installed at the tail end of the switch rod 5.2, and the head end of the switch rod 5.2 faces the connecting pipe 2. In this way, the switch lever 5.2 can be moved axially by rotating the switch knob 5.3, when the switch lever 5.2 is moved towards the connecting tube 2, the connecting tube 2 is gradually flattened until it is closed, whereas when the switch lever 5.2 is moved away from the connecting tube 2, the connecting tube 2 is opened. The structure can effectively clamp the connecting pipe 2, and prevent backflow.
The foregoing description is only of the preferred embodiments of the invention, and the above-described embodiments are not intended to limit the invention. Various changes and modifications may be made within the scope of the technical idea of the present invention, and any person skilled in the art may make any modification, modification or equivalent substitution according to the above description, which falls within the scope of the present invention.
Claims (5)
1. The anti-backflow exhaust type indwelling needle comprises an indwelling needle main body (1), a connecting pipe (2) and a liquid inlet three-way pipe (3), and is characterized in that an exhaust device (4) and an anti-backflow switch device (5) are arranged on the connecting pipe (2), the exhaust device (4) comprises a shell (4.1), a support (4.2), an exhaust filter membrane (4.3), a liquid inlet pipe (4.4) and a liquid outlet pipe (4.5), the shell (4.1) is of an internally hollow flat shape, a liquid inlet pipe (4.4) and a liquid outlet pipe mounting hole which are communicated with an inner cavity space of the shell (4.1) are arranged on the peripheral wall of the shell (4.1), a liquid inlet through hole (4.4 a) is arranged in the center of the liquid inlet pipe (4.4), the support (4.2) is arranged in an inner cavity of the shell (4.1), the support (4.2) comprises an annular outer ring (4.2.1) and an annular inner ring (4.2.2), two ends of the annular outer ring (4.2.1) are abutted against the annular side wall of the shell (4.1) and are tightly connected with the annular side wall (4.2.1) of the annular outer ring (2.1), a plurality of liquid inlet holes (4.2.1) are arranged in a clearance between the annular side walls of the annular outer ring (4.2.1) and the annular side wall (4.1), a second flow gap (4.2.5) is reserved between the outer surface of the annular inner ring (4.2.2) and the outer surface of the annular outer ring (4.2.1), a plurality of second liquid inlets (4.2.6) communicated with the second flow gap (4.2.5) are formed in the peripheral wall of the annular inner ring (4.2.2) at intervals, a plurality of second liquid inlets (4.2.6) and a plurality of first liquid inlets (4.2.4) are distributed in a staggered mode in the circumferential direction, a particle filter membrane (6) is combined on the outer surface of the annular outer ring (4.2.1) and the inner surface of the annular inner ring (4.2.2.2), a liquid outlet pipe (4.5) is arranged along the radial direction of the annular outer ring (4.2.1) and the annular inner ring (4.2.2), the outer side of the liquid outlet pipe (4.5) penetrates through a liquid outlet pipe mounting hole formed in a shell (4.1), the center of the liquid outlet pipe (4.5) is provided with a convex shape corresponding to the inner side wall (4.1.1.2.2.2) of the annular inner ring (4.2), and a side wall (4.1) of the liquid outlet hole is formed in the inner side wall (4.1) of the annular inner ring (4.2.2.2.2).
2. The anti-reflux and venting type indwelling needle according to claim 1, wherein the housing (4.1) comprises a housing body (4.1.1) and a housing upper cover (4.1.2), a connecting groove (4.1.1 a) is arranged at the opening of the housing (4.1), a connecting convex ring (4.1.2 a) is arranged at the edge of the housing upper cover (4.1.2), and the connecting convex ring (4.1.2 a) is embedded in the connecting groove (4.1.1 a).
3. The anti-reflux, breathable, indwelling needle according to claim 1, in which the width of the first flow gap (4.2.3) is greater than the width of the second flow gap (4.2.5).
4. The anti-reflux, ventable indwelling needle according to claim 3, in which said first flow gap (4.2.3) is 1-2mm and said second flow gap (4.2.5) is 0.5-2mm.
5. The anti-reflux and venting indwelling needle according to claim 1, the anti-reflux switch device (5) comprises a switch seat (5.1), a switch rod (5.2) and a switch knob (5.3), a through groove (5.1 a) is arranged in the switch seat (5.1), the connecting pipe (2) is arranged in the through groove (5.1 a) in a penetrating way, a push rod cavity (5.1 b) which is vertical to and mutually communicated with the through groove (5.1 a) is arranged beside the through groove (5.1 a), the switch rod (5.2) is arranged in the push rod cavity (5.1 b) in a threaded way, the switch knob (5.3) is arranged at the tail end of the switch rod (5.2), and the head end of the switch rod (5.2) faces the connecting pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910156438.1A CN109758639B (en) | 2019-03-01 | 2019-03-01 | Anti-reflux exhaust type indwelling needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910156438.1A CN109758639B (en) | 2019-03-01 | 2019-03-01 | Anti-reflux exhaust type indwelling needle |
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| CN109758639A CN109758639A (en) | 2019-05-17 |
| CN109758639B true CN109758639B (en) | 2025-03-18 |
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| CN201910156438.1A Active CN109758639B (en) | 2019-03-01 | 2019-03-01 | Anti-reflux exhaust type indwelling needle |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204684347U (en) * | 2015-02-06 | 2015-10-07 | 中国人民解放军第三军医大学第三附属医院 | There is the remaining needle of degassing function |
| CN106563189A (en) * | 2016-07-26 | 2017-04-19 | 孝感嘉瑞应用科技开发有限公司 | Infusion apparatus provided with precise speed controller |
| CN210521490U (en) * | 2019-03-01 | 2020-05-15 | 常州市第一人民医院 | Anti-reflux indwelling needle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688534B (en) * | 2012-05-11 | 2014-02-12 | 魏颖德 | Multifunctional liquid medicine filter for infusion |
| WO2015188576A1 (en) * | 2014-06-14 | 2015-12-17 | 山东新华安得医疗用品有限公司 | Self-venting, anti-bubble, automatic fluid checking, precision filtration, infusion apparatus |
-
2019
- 2019-03-01 CN CN201910156438.1A patent/CN109758639B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204684347U (en) * | 2015-02-06 | 2015-10-07 | 中国人民解放军第三军医大学第三附属医院 | There is the remaining needle of degassing function |
| CN106563189A (en) * | 2016-07-26 | 2017-04-19 | 孝感嘉瑞应用科技开发有限公司 | Infusion apparatus provided with precise speed controller |
| CN210521490U (en) * | 2019-03-01 | 2020-05-15 | 常州市第一人民医院 | Anti-reflux indwelling needle |
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