CN210521490U - Anti-backflow exhaust type remaining needle - Google Patents
Anti-backflow exhaust type remaining needle Download PDFInfo
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- CN210521490U CN210521490U CN201920265551.9U CN201920265551U CN210521490U CN 210521490 U CN210521490 U CN 210521490U CN 201920265551 U CN201920265551 U CN 201920265551U CN 210521490 U CN210521490 U CN 210521490U
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Abstract
The utility model relates to a needle is kept somewhere to anti refluence exhalative type, including keeping somewhere needle main part, connecting pipe and feed liquor three-way pipe, its characterized in that: and the connecting pipe is provided with an exhaust device and an anti-backflow switch device. The utility model discloses the structure is ingenious, and reasonable in design through set up exhaust apparatus and anti backflow switching device on the connecting pipe of keeping somewhere the needle main part, and exhaust apparatus can avoid appearing the appearance of air admission vein condition with getting into the air escape who keeps somewhere the needle in, reduces medical dispute, makes the patient not have mental pressure. When the venous transfusion is not carried out, the anti-backflow switch device can be opened, so that blood can not flow backwards, the service time of the remaining needle is prolonged, and the formation of thrombus is reduced.
Description
Technical Field
The utility model relates to an indwelling needle, in particular to an anti-reflux exhaustible indwelling needle, belonging to the technical field of medical instruments.
Background
The use of the vein indwelling needle can reduce the pain of a patient caused by repeated puncture and protect the vein, but after the conventional indwelling needle is placed, if air enters the indwelling needle, the air cannot be discharged, and the air bubbles entering the vein can cause adverse effects on the psychology of the patient, so that medical disputes are caused. The self-protection consciousness of the patients is continuously strengthened at present, and the service requirement on medical care is higher and higher. Patients often call nurses to remove air bubbles, and even if the small air bubbles are explained by soil conservation and have no influence on human bodies, the patients are often difficult to forgive, and sometimes the infusion set needs to be replaced and the veins need to be punctured again. Although a small amount of air enters the human body, so that serious physiological dysfunction is not caused, the air enters the human body during transfusion, which is not allowed by the operating rules. Some patients will present a series of problems, which leads to medical disputes. Therefore, the trace air entering the blood vessel is reduced during transfusion, and the occurrence of medical disputes is reduced.
In addition, because the indwelling needle is indwelling in the blood vessel of the patient, with the limb movement of the patient, the condition that blood flows back into the indwelling needle is often generated clinically, which may cause the formation of thrombus, leading to the disuse of the indwelling needle, requiring the puncture again, bringing more pain to the patient and increasing the workload of medical care personnel. The anti-backflow switch device is arranged at the top end of the remaining needle, so that blood cannot flow backwards, the service time of the remaining needle can be prolonged, and the formation of thrombus is reduced.
Disclosure of Invention
An object of the utility model is to overcome the not enough of existence among the prior art, provide an anti backflow exhalative type and keep somewhere the needle, its structure is ingenious, and reasonable in design can enough prevent blood backflow again with air escape effectively, alleviates nurse's work load.
According to the utility model provides a technical scheme: but needle is kept somewhere to anti backflow exhaust type, including keeping somewhere needle main part, connecting pipe and feed liquor three-way pipe, its characterized in that: and the connecting pipe is provided with an exhaust device and an anti-backflow switch device.
As a further improvement of the utility model, the exhaust device comprises a shell, a bracket, an exhaust filter membrane, a liquid inlet pipe and a liquid outlet pipe; the shell is of a flat shape with a hollow interior, a liquid inlet pipe and a liquid outlet pipe mounting hole which are communicated with the inner cavity space of the shell are arranged on the peripheral wall of the shell, and a liquid inlet through hole is formed in the center of the liquid inlet pipe; the support is arranged in an inner cavity of the shell and comprises an annular outer ring and an annular inner ring, two ends of the annular outer ring are tightly abutted against and hermetically connected with two side walls of the shell, a first circulation gap is reserved between the outer peripheral surface of the annular outer ring and the inner surface of the peripheral wall of the shell, and a plurality of first liquid inlets communicated with the first circulation gap are arranged on the peripheral wall of the annular outer ring at intervals; the annular inner ring is concentrically arranged in the annular outer ring, a second circulation gap is reserved between the outer surface of the annular inner ring and the outer surface of the annular outer ring, a plurality of second liquid inlets communicated with the second circulation gap are arranged on the peripheral wall of the annular inner ring at intervals, and the plurality of second liquid inlets and the plurality of first liquid inlets are arranged in a staggered manner in the circumferential direction; the liquid outlet pipe is arranged along the radial direction of the annular outer ring and the annular inner ring and is integrally connected with the annular outer ring and the annular inner ring, the outer part of the liquid outlet pipe penetrates through a liquid outlet pipe mounting hole arranged on the shell, a liquid outlet through hole is formed in the center of the liquid outlet pipe, and the inner end of the liquid outlet through hole is communicated with the inner space of the annular inner ring; and the side wall of the shell is provided with an exhaust port corresponding to the inner space of the annular inner ring, and the exhaust filter membrane is arranged at the exhaust port.
As a further improvement, the side wall provided with the gas vent on the casing is established to the bulging shape, the gas vent sets up the central point at the bulging shape lateral wall and puts.
As a further improvement of the utility model, a particle filtering membrane is combined on the outer surface of the annular outer ring and/or the inner surface of the annular inner ring.
As a further improvement, the casing includes casing body and casing upper cover, the opening part of casing body is provided with connecting grooves, the border department of casing upper cover is provided with connects the protruding circle, connect protruding circle scarf joint in the connecting grooves.
As a further improvement of the present invention, the width of the first circulation gap is greater than the width of the second circulation gap.
As a further improvement of the utility model, the first circulation gap is 1-2mm, and the second circulation gap is 0.5-2 mm.
As a further improvement of the utility model, anti switching device that backflows includes switch seat, switch lever and switch knob, is equipped with in the switch seat and runs through the groove, the connecting pipe is worn to establish and is run through the inslot run through the other push rod chamber that is equipped with rather than perpendicular and communicate each other of groove, the switch lever screw thread is installed at the push rod intracavity, the terminal installation switch knob of switch lever, switch lever end towards the connecting pipe.
Compared with the prior art, the utility model, have following advantage:
1) the utility model discloses the structure is ingenious, and reasonable in design through set up exhaust apparatus and anti backflow switching device on the connecting pipe of keeping somewhere the needle main part, and exhaust apparatus can avoid appearing the appearance of air admission vein condition with getting into the air escape who keeps somewhere the needle in, reduces medical dispute, makes the patient not have mental pressure. When the venous transfusion is not carried out, the anti-backflow switch device can be opened, so that blood can not flow backwards, the service time of the remaining needle is prolonged, and the formation of thrombus is reduced.
2) The utility model provides an exhaust apparatus structure is ingenious, and the liquid medicine is when exhaust apparatus flows through, and the bubble in the liquid medicine can be because capillary phenomenon collects automatically and is brought into annular inner circle in the liquid medicine circulation in-process, discharges through the exhaust filter membrane of exhaust vent department after the inner space that enters into annular inner circle, and it is convenient, swift, high-efficient to exhaust.
3) The utility model provides an anti-reflux switch can close the effective clamp of connecting pipe, avoids the reflux to it is firm to lock, can not open by accident.
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 of fig. 1.
Fig. 3 is a sectional view taken along line a-a in fig. 2.
Fig. 4 is an exploded view of the exhaust apparatus of fig. 2.
Fig. 5 is an enlarged sectional view of the structure of the backflow prevention switching device in fig. 1.
Description of reference numerals: 1-indwelling needle main body, 2-connecting pipe, 3-liquid inlet three-way pipe, 4-exhaust device, 4.1-shell, 4.1.1-shell body, 4.1.1 a-connecting groove, 4.1.2-shell upper cover, 4.1.2 a-connecting convex ring, 4.1 a-exhaust port, 4.2-support, 4.2.1-annular outer ring, 4.2.2-annular inner ring, 4.2.3-first circulation gap, 4.2.4-first liquid inlet, 4.2.5-second circulation gap, 4.2.6-second liquid inlet, 4.3-exhaust filter membrane, 4.4-liquid inlet pipe, 4.4 a-liquid inlet through hole 4.5-liquid outlet pipe, 4.5 a-liquid outlet through hole, 5-anti-backflow switch device, 5.1-switch seat, 5.1 a-penetrating groove, 5.1 b-push rod cavity, 5.2-switch rod, 5.3-knob switch, 6-particle filtration membrane.
Detailed Description
The invention is further described with reference to the following specific drawings and examples.
As shown in fig. 1, the embodiment discloses an anti-backflow exhaustible indwelling needle, which comprises an indwelling needle body 1, a connecting pipe 2 and a liquid inlet three-way pipe 3, wherein an exhaust device 4 and an anti-backflow switch device 5 are arranged on the connecting pipe 2. Through setting up exhaust apparatus 4, can be with the air escape that gets into in the remaining needle, avoid appearing the appearance that the air got into the vein condition, reduce medical dispute, make the patient not have psychological pressure. By arranging the anti-reflux switch device 5, the anti-reflux switch device 5 can be opened when the venous transfusion is not carried out, so that the 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 can adopt a conventional component having an exhaust function in the prior art, such as a precision liquid medicine filter having an exhaust function. However, the existing precision liquid medicine filter mainly has the function of filtering particles in liquid medicine, and according to the design principle, the section of the precision liquid medicine filter is larger than that of a liquid conveying pipe, so that the liquid medicine flows into the precision liquid medicine filter, the flow speed is reduced, the pressure is reduced, the force of the liquid medicine for pushing a 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 a human body. If adopt accurate liquid medicine filter to come as exhaust apparatus 4, owing to wherein have the air occupy-place, the area of liquid medicine through the filter membrane in the accurate liquid medicine filter will reduce, will make accurate liquid medicine filter accelerate through speed per hour, reduced the design requirement to reduce accurate liquid medicine filter's effect, lead to making partial particle can pass through filter membrane 6 and advance the human body, bring harm for the patient.
In order to overcome the above-mentioned defects of the existing precise liquid medicine filter, the present embodiment provides an exhaust apparatus 4 as shown in fig. 2 to 4, which includes a housing 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 a flat shape with a hollow interior, 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 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 tightly abutted and hermetically connected with two side walls of the shell 4.1, a first circulation 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 circulation 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 flow-through 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-through gap 4.2.5 are arranged on the circumferential wall of the annular inner ring 4.2.2 at intervals, and 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 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 and is integrally connected with the annular outer ring 4.2.1 and the annular inner ring 4.2.2, the outside 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 formed in the center of the liquid outlet pipe 4.5, and 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; the side wall of the shell 4.1 is provided with an exhaust port 4.1a corresponding to the inner space of the annular inner ring 4.2.2, and the exhaust filter membrane 4.3 is arranged at the exhaust port 4.1 a.
So set up, during the use, with the one side up that has the gas vent 4.1a of casing 4.1, the liquid medicine flows into in casing 4.1 through liquid inlet through-hole 4.4a to distribute in first circulation interval 4.2.3, then flow into in first circulation interval 4.2.5 through first inlet 4.2.4, flow into the inner space of annular inner circle 4.2.2 from second inlet 4.2.6 again. In the process, the plurality of second liquid inlets 4.2.6 and the plurality of first liquid inlets 4.2.4 are arranged in a staggered manner in the circumferential direction, so that bubbles in the liquid medicine can be automatically collected and brought into the annular inner ring 4.2.2 due to capillary phenomenon when the liquid medicine circulates, and are discharged through the exhaust filter membrane 4.3 at the exhaust port 4.1a after entering the inner space of the annular inner ring 4.2.2, and the exhaust is convenient, rapid and efficient.
As shown in fig. 2 and 4, in the present embodiment, the side wall of the housing 4.1 where the exhaust port 4.1a is provided is formed in a convex shape, and the exhaust port 4.1a is provided at the center of the convex side wall. So set up, because air density is less than liquid, can be located the upper portion of annular inner circle 4.2.2 inner space after the air collects in annular inner circle 4.2.2, and the high structure of above-mentioned low center all around collects the air more easily, also provides reasonable structure guarantee for the smooth discharge of air.
As shown in fig. 3, in this embodiment, a particle filter membrane 6 is bonded to the outer surface of the annular outer ring 4.2.1. The exhaust device 4 also has the function of filtering particles, thereby improving the safety of transfusion. In practical manufacture, the inner surface of the annular inner ring 4.2.2 may also incorporate a particulate filter membrane 6. The particulate filter membrane 6 can be bonded or welded to the annular outer ring 4.2.1 and the annular inner ring 4.2.2.
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 provided at an opening of the housing body 4.1, a connection convex ring 4.1.2a is provided at an edge of the housing upper cover 4.1.2, and the connection convex ring 4.1.2a is embedded 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.
As shown in fig. 3, in the present exemplary embodiment, the width of the first flow-through gap 4.2.3 is greater than the width of the second flow-through gap 4.2.5. With such an arrangement, the air bubbles can be gradually collected in the order from large to small during the circulation of the liquid medicine, thereby more efficiently discharging the air. The first through-flow gap 4.2.3 is 1-2mm, preferably 1.5 mm; the second flow-through gap 4.2.5 is 0.5-2mm, preferably 1 mm.
The anti-backflow switching device 5 of the present invention can employ conventional components with turn-off function in the prior art, such as a speed regulator. However, the existing speed regulator has the problem of poor locking, and can be opened accidentally, so that the function of anti-backflow cannot be realized.
In order to overcome the above-mentioned defects of the existing speed regulator, the present embodiment provides an anti-backflow switching device 5 as shown in fig. 5, which includes a switch base 5.1, a switch lever 5.2 and a switch knob 5.3, a through groove 5.1a is provided in the switch base 5.1, the connecting pipe 2 is inserted into the through groove 5.1a, a push rod cavity 5.1b perpendicular to and communicated with the through groove 5.1a is provided beside the through groove 5.1a, the switch lever 5.2 is installed in the push rod cavity 5.1b by screw threads, the switch knob 5.3 is installed at the end of the switch lever 5.2, and the head end of the switch lever 5.2 faces the connecting pipe 2. With such arrangement, the switch rod 5.2 can be axially moved by rotating the switch knob 5.3, and when the switch rod 5.2 moves towards the connecting pipe 2, the connecting pipe 2 is gradually squeezed flat until being closed; conversely, when the switch lever 5.2 is moved away from the connection piece 2, the connection piece 2 opens. The structure can effectively clamp the connecting pipe 2 to prevent backflow.
The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Within the scope of the technical idea of the present invention, various modifications and alterations can be made, and any person skilled in the art can make modifications, amendments or equivalent replacements according to the above description, all belonging to the protection scope of the present invention.
Claims (6)
1. But needle is kept somewhere to anti refluence exhaust type, including keeping somewhere needle main part (1), connecting pipe (2) and feed liquor three-way pipe (3), its 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 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 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 tightly abutted against and hermetically connected with two side walls of the shell (4.1), a first circulation 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 circulation gap (4.2.3) are formed in 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 circulation 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 circulation gap (4.2.5) are arranged on the peripheral wall of the annular inner ring (4.2.2) at intervals, and 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 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) and is integrally connected with the annular outer ring (4.2.1) and the annular inner ring (4.2.2), the outside 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 formed in the center of the liquid outlet pipe (4.5), and 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); an exhaust port (4.1a) is formed in the side wall of the shell (4.1) corresponding to the inner space of the annular inner ring (4.2.2), and the exhaust filter membrane (4.3) is arranged at the exhaust port (4.1 a);
the anti-backflow switch device (5) comprises a switch base (5.1), a switch rod (5.2) and a switch knob (5.3), wherein a through groove (5.1a) is formed in the switch base (5.1), the connecting pipe (2) is arranged in the through groove (5.1a) in a penetrating mode, a push rod cavity (5.1b) which is perpendicular to the through groove (5.1a) and communicated with the through groove is formed in the through groove (5.1a), the switch rod (5.2) is installed in the push rod cavity (5.1b) in a threaded mode, 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 towards the connecting pipe (2).
2. The anti-reflux ventable indwelling needle of claim 1, wherein: the side wall of the shell (4.1) provided with the exhaust port (4.1a) is in a convex shape, and the exhaust port (4.1a) is arranged in the center of the convex side wall of the convex shape.
3. The anti-reflux ventable indwelling needle of claim 1, wherein: and a particle filtering membrane (6) is combined on the outer surface of the annular outer ring (4.2.1) and/or the inner surface of the annular inner ring (4.2.2).
4. The anti-reflux ventable indwelling needle of claim 1, wherein: casing (4.1) includes casing body (4.1.1) and casing upper cover (4.1.2), the opening part of casing (4.1) body is provided with connecting groove (4.1.1a), the border department of casing upper cover (4.1.2) is provided with connects protruding circle (4.1.2a), connect protruding circle (4.1.2a) scarf joint in connecting groove (4.1.1 a).
5. The anti-reflux ventable indwelling needle of claim 1, wherein: the width of the first flow-through gap (4.2.3) is greater than the width of the second flow-through gap (4.2.5).
6. The anti-reflux ventable indwelling needle of claim 5, wherein: the first flow-through gap (4.2.3) is 1-2mm and the second flow-through gap (4.2.5) is 0.5-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265551.9U CN210521490U (en) | 2019-03-01 | 2019-03-01 | Anti-backflow exhaust type remaining needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265551.9U CN210521490U (en) | 2019-03-01 | 2019-03-01 | Anti-backflow exhaust type remaining needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210521490U true CN210521490U (en) | 2020-05-15 |
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ID=70592310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920265551.9U Active CN210521490U (en) | 2019-03-01 | 2019-03-01 | Anti-backflow exhaust type remaining needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210521490U (en) |
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2019
- 2019-03-01 CN CN201920265551.9U patent/CN210521490U/en active Active
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