CN110787339B - Prevent venous return needle of keeping somewhere - Google Patents
Prevent venous return needle of keeping somewhere Download PDFInfo
- Publication number
- CN110787339B CN110787339B CN201911231574.9A CN201911231574A CN110787339B CN 110787339 B CN110787339 B CN 110787339B CN 201911231574 A CN201911231574 A CN 201911231574A CN 110787339 B CN110787339 B CN 110787339B
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- needle
- indwelling needle
- cavity
- extension tube
- connecting seat
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- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 6
- 239000008280 blood Substances 0.000 abstract description 17
- 210000004369 blood Anatomy 0.000 abstract description 17
- 238000010253 intravenous injection Methods 0.000 abstract description 14
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 4
- 229940079593 drug Drugs 0.000 abstract description 3
- 238000001802 infusion Methods 0.000 description 17
- 230000014759 maintenance of location Effects 0.000 description 11
- 238000010992 reflux Methods 0.000 description 7
- 238000001990 intravenous administration Methods 0.000 description 6
- 210000003462 vein Anatomy 0.000 description 6
- 210000004204 blood vessel Anatomy 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 208000036828 Device occlusion Diseases 0.000 description 3
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229960002897 heparin Drugs 0.000 description 3
- 229920000669 heparin Polymers 0.000 description 3
- 230000000474 nursing effect Effects 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000002016 colloidosmotic effect Effects 0.000 description 2
- 210000003722 extracellular fluid Anatomy 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 206010063677 Puncture site infection Diseases 0.000 description 1
- 206010042345 Subcutaneous haematoma Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 206010047249 Venous thrombosis Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 208000001297 phlebitis Diseases 0.000 description 1
- 230000004962 physiological condition Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Abstract
The invention discloses an anti-venous return indwelling needle, which particularly relates to the field of medical equipment, and comprises an indwelling needle body and a connecting seat, wherein an extension tube is arranged between the connecting seat and the indwelling needle body, a liquid stopping clamp is arranged on the extension tube, an indwelling needle head is arranged inside the indwelling needle body, a needle cap is arranged outside the indwelling needle head, a liquid collecting cavity is arranged inside the indwelling needle body, one end of the indwelling needle head is connected with the liquid collecting cavity, and a movable piece is arranged between the liquid collecting cavity and an inner cavity of the indwelling needle head. According to the invention, through stirring of the movable part on the inner cavity of the indwelling needle, intravenous injection is conveyed to the inner part of the liquid collecting cavity through the extension pipe by the connecting seat, the entered injection can impact on the stress plate, a steering force is brought to the movable part, and the rotating similar to stirring is generated on the inner cavity of the indwelling needle together with the limiting convex point, so that the inner cavity of the indwelling needle can be effectively prevented from being blocked by blood backflow or powdery medicines.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an anti-venous return indwelling needle.
Background
Intravenous transfusion is the most common nursing operation in clinical nursing work, plays an important role in treating diseases and rescuing patients by the advantages of rapid administration, quick curative effect and the like, and becomes one of the most common and direct effective treatment means in clinic. With the continuous progress of clinical care, intravenous catheters are increasingly being used in clinical infusion. The intravenous needle can reduce pain caused by repeated puncture; the emergency rescue is facilitated; but also reduces the operation times of puncturing by nurses and improves the working efficiency.
Adverse reactions such as puncture site infection, subcutaneous hematoma, liquid leakage, catheter blockage, phlebitis, venous thrombosis and the like often occur in the clinical application process. Especially, the blockage of the catheter causes the venous indwelling needle not to be used normally, which increases the pain and the economic burden of the patient and increases the nursing workload. The cause of the blockage of the catheter is complex, and the blockage is usually related to the reflux of venous blood of the indwelling needle, incomplete flushing of the catheter after intravenous nutrition transfusion, improper selection of the type and the dosage of the catheter sealing liquid and the pushing speed, abnormal coagulation mechanism of a patient and the like. Among the factors that cause the blockage of the catheter, the blockage of the catheter caused by the reflux of blood is particularly prominent because of the excessive movement of the patient after the tube is sealed or the excessive pressure of the limb caused by the excessive pressure of the vein caused by the improper operation of the nurse during the tube sealing. In physiological conditions, the hydrostatic pressure of blood and the colloid osmotic pressure of interstitial fluid and the colloid osmotic pressure of plasma and the hydrostatic pressure of interstitial fluid are two sets of antagonistic pressures that maintain a dynamic balance. However, due to the physiological characteristics of thin wall and large caliber of the vein, blood is easily affected by factors such as blood gravity in the blood vessel and tissue pressure outside the blood vessel. In the recumbent position, the veins of the whole body are approximately at the same level as the heart, and gravity has little effect on venous blood reflux. When the human body is in an upright position or is active or exercised, blood stays in the blood vessels below the heart-organ level under the influence of gravity. The venous indwelling needle is a tool for keeping the soft outer sleeve in a blood vessel for transfusion, and because the venous indwelling needle is communicated with the outside, when the venous pressure is increased and is higher than the pressure in the extension tube 3 due to factors such as gravity, the tissue pressure outside the blood vessel and the like, blood easily flows back to the lumen of the indwelling needle, so that the tube blocking rate is increased, and the indwelling time is shortened. Therefore, there is a need to address the problem of catheter blockage caused by blood reflux.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides an anti-venous return indwelling needle, which aims to solve the technical problems that: how to effectively solve the problem of catheter blockage caused by blood reflux of the detention needle.
In order to achieve the above purpose, the present invention provides the following technical solutions: an anti-venous return indwelling needle comprises an indwelling needle body and a connecting seat, wherein an extension tube is arranged between the connecting seat and the indwelling needle body, and a liquid stopping clamp is arranged on the extension tube;
The novel medical infusion set comprises an infusion needle body, and is characterized in that an infusion needle is arranged in the infusion needle body, a needle cap is arranged outside the infusion needle body, a liquid collecting cavity is arranged inside the infusion needle body, one end of the infusion needle is connected with the liquid collecting cavity, a movable piece is arranged between the liquid collecting cavity and an inner cavity of the infusion needle, a bifurcation tube is fixedly arranged between the outer wall of one end of the infusion needle body far away from the infusion needle and an extension tube, a containing cavity is arranged inside one end of the infusion needle body far away from the infusion needle, a through groove is formed between the containing cavity and the liquid collecting cavity, a sealing plug is arranged inside the containing cavity, and a first sealing cap is arranged on the outer wall of one end of the infusion needle body far away from the infusion needle;
The movable piece comprises a plurality of stress plates, one end of each stress plate is provided with a main body plate, the other end of each stress plate is provided with a connecting rod, the outer wall of each connecting rod is uniformly provided with a plurality of limit protruding points, and the stress plates, the main body plates, the connecting rods and the limit protruding points are uniformly formed;
the sealing plug comprises a plug column, and a limit groove is formed in the middle of the top end of the plug column;
the first sealing cap comprises a first cap shell, a limit lug is fixedly arranged in the middle of the inner wall of the first cap shell, and anti-slip raised strips are uniformly and fixedly arranged on the outer wall of the first cap shell.
As shown in figures 1-7, intravenous injection is delivered to the inside of the liquid collecting cavity through the connecting seat by the extension tube, the entered injection can impact on the stress plate and bring a steering force to the movable part, so that the connecting rod is driven to rotate at an angle in the inner cavity of the indwelling needle, and the connecting rod and the limiting protruding point generate stirring-like rotation to the inner cavity of the indwelling needle together, thereby effectively avoiding the blocking of the inner cavity of the indwelling needle due to blood backflow or powdery medicines.
In a preferred embodiment, the shape of the connecting seat is in a Y shape, one end of the connecting seat is connected with the extension tube, two opening parts of one end of the connecting seat far away from the extension tube are respectively provided with a second sealing cap, and when one extension tube opening cannot be used, the other second sealing cap can be pulled out from the extension tube opening.
In a preferred embodiment, the second sealing cap comprises a second cap shell, a limiting plug is fixedly arranged in the middle of the inner wall of the second cap shell, the limiting plug is made of rubber materials, the inner diameter of the second cap shell is matched with the outer diameter of the connecting seat, the outer diameter of the limiting plug is matched with the inner diameter of the connecting seat, and the sealing of the opening of the extension tube by the second sealing cap ensures the sanitary requirement of the retention needle when the retention needle is not used.
In a preferred embodiment, the liquid stopping clamp comprises a clamping plate, a storage hole and a placing groove are formed in the clamping plate, one end of the placing groove is connected with the storage hole, the storage hole and the placing groove longitudinally penetrate through the clamping plate, and a plurality of limiting raised strips are uniformly arranged on the inner wall of the placing groove and used for sealing the extension pipe.
In a preferred embodiment, the inner diameter of the receiving hole is larger than the width of the placing groove, and the outer diameter of the extension tube is matched with the receiving hole.
In a preferred embodiment, the sealing plug is made of a rubber material, and the outer diameter of the sealing plug is adapted to the receiving cavity.
In a preferred embodiment, the limit lugs are distributed in a cross shape, and the inner wall of the first cap shell is connected with the outer wall of the top end of the indwelling needle body through threads.
In a preferred embodiment, the outer diameter of the main body plate is smaller than the inner diameter of the liquid collecting cavity, the length of the connecting rod is smaller than the length of the retaining needle, and the total outer diameter of the connecting rod and the limiting raised strips is smaller than the inner diameter of the retaining needle.
The invention has the technical effects and advantages that:
1. According to the invention, the inner cavity of the indwelling needle is stirred by the movable part, the positive pressure connector is adopted for intravenous transfusion, intravenous injection is conveyed to the inside of the liquid collecting cavity through the extension tube through the connecting seat, the entered injection can impact on the stressed plate, vortex is generated according to the design of the positive pressure bifurcation tube and the liquid collecting cavity, a steering force is brought to the movable part, the generated positive pressure liquid drives the connecting rod to rotate at an angle in the inner cavity of the indwelling needle, and the connecting rod and the limiting convex point together generate similar stirring rotation to the inner cavity of the indwelling needle, so that the inner cavity of the indwelling needle is effectively prevented from being blocked by blood backflow or powdery medicine, blood backflow into the indwelling needle is prevented, the coagulation and thrombus are prevented from being formed, the trouble of tube sealing and complications caused by heparin tube sealing liquid and repeated puncturing heparin cap are reduced, the blocking is prolonged, and the problems of transfusion particles, pollution and the like caused by repeated puncturing of the heparin cap by the needle in the traditional tube sealing process are avoided;
2. According to the invention, the liquid stopping clamp is arranged, after single intravenous injection is finished, a medical staff can pull the clamping plate, the position of the extension tube is stored from the storage hole to the position of the placing groove, the position of the extension tube stored in the placing groove is limited by the limiting convex strips, the soft extension tube is limited by the width of the placing groove, the contact position of the extension tube and the liquid stopping clamp can be clamped, so that the liquid collecting cavity is equal to the pressure intensity in a vein, the blood reflux caused by pressure difference is avoided, when the intravenous injection is required to be carried out again by the indwelling needle body, the extension tube is only required to be pushed back to the storage hole again, the extension tube is in a recovery shape for carrying intravenous injection again, and the use of the medical staff is facilitated.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is an enlarged view of the portion a in fig. 1 according to the present invention.
Fig. 3 is a schematic view of a movable member structure according to the present invention.
Fig. 4 is a plan view of the indwelling needle body according to the present invention.
Fig. 5 is a schematic view of the structure of the sealing plug of the present invention.
FIG. 6 is a schematic view of a first seal cap according to the present invention.
FIG. 7 is a schematic view of a second seal cap according to the present invention.
Fig. 8 is a schematic view of a liquid-stopping clip according to the present invention.
The reference numerals are: the novel infusion needle comprises a1 indwelling needle body, an 11 indwelling needle head, a 12 needle cap, a 13 liquid collecting cavity, a 14 movable piece, a 141 stress plate, a 142 main body plate, a 143 connecting rod, a 144 limiting convex point, a 15 bifurcation tube, a 16 accommodating cavity, a 17 through groove, an 18 sealing plug, a 181 plug column, a 182 limiting groove, a 19 first sealing cap, a 191 first cap shell, a 192 limiting convex piece, a 193 anti-skid convex strip, a2 connecting seat, a 21 second sealing cap, a 211 second cap shell, a 212 limiting plug, a3 extension tube, a 4 liquid stopping clamp, a 41 clamping plate, a 42 accommodating hole, a 43 accommodating groove and a 44 limiting convex strip.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides an anti-venous return indwelling needle which comprises an indwelling needle body 1 and a connecting seat 2, wherein an extension tube 3 is arranged between the connecting seat 2 and the indwelling needle body 1, and a liquid stopping clamp 4 is arranged on the extension tube 3;
The novel medical infusion set is characterized in that an indwelling needle 11 is arranged in the indwelling needle body 1, a needle cap 12 is arranged outside the indwelling needle 11, a liquid collecting cavity 13 is arranged in the indwelling needle body 1, one end of the indwelling needle 11 is connected with the liquid collecting cavity 13, a movable part 14 is arranged between the liquid collecting cavity 13 and the inner cavity of the indwelling needle 11, a bifurcation tube 15 is fixedly arranged between the outer wall of one end of the indwelling needle body 1 far away from the indwelling needle 11 and the extension tube 3, a containing cavity 16 is arranged in one end of the indwelling needle body 1 far away from the indwelling needle 11, a through groove 17 is formed between the containing cavity 16 and the liquid collecting cavity 13, a sealing plug 18 is arranged in the containing cavity 16, and a first sealing cap 19 is arranged on the outer wall of one end of the indwelling needle body 1 far away from the indwelling needle 11;
The movable piece 14 comprises a plurality of stress plates 141, one end of each stress plate 141 is provided with a main body plate 142, the other end of each stress plate 141 is provided with a connecting rod 143, a plurality of limit protruding points 144 are uniformly arranged on the outer wall of each connecting rod 143, and the stress plates 141, the main body plates 142, the connecting rods 143 and the limit protruding points 144 are uniformly formed in a whole;
the sealing plug 18 comprises a plug column 181, and a limit groove 182 is formed in the middle of the top end of the plug column 181;
The first sealing cap 19 comprises a first cap shell 191, a limit lug 192 is fixedly arranged in the middle of the inner wall of the first cap shell 191, and anti-slip raised strips 193 are uniformly and fixedly arranged on the outer wall of the first cap shell 191.
The connecting seat 2 is in a Y shape, one end of the connecting seat 2 is connected with the extension tube 3, two openings at one end of the connecting seat 2 far away from the extension tube 3 are respectively provided with a second sealing cap 21, when one extension tube 3 is not used, the other second sealing cap 21 can be pulled out from the opening of the extension tube 3, the second sealing cap 21 comprises a second cap shell 211, a limiting plug 212 is fixedly arranged in the middle of the inner wall of the second cap shell 211, the limiting plug 212 is made of a rubber material, the inner diameter of the second cap shell 211 is matched with the outer diameter of the connecting seat 2, the outer diameter of the limiting plug 212 is matched with the inner diameter of the connecting seat 2, the sealing cap 21 seals the opening of the extension tube 3, so that the sanitary requirement of the retention needle is ensured when the retention needle is not used, the sealing plug 18 is made of a rubber material, the outer diameter of the sealing plug 18 is matched with the storage cavity 16, the limiting lug 192 is distributed in a cross shape, the inner diameter of the first cap shell 191 is connected with the outer wall of the top end of the retention needle body 1 through threads, the main body plate 142 is smaller than the total needle head length 11, and the total inner diameter of the retention needle 143 is smaller than the total needle length 11, and the total needle length is smaller than 11.
As shown in fig. 1 to 7, the embodiment is specifically: when the retention needle is used, only one second sealing cap 21 at one end of the connecting seat 2 is pulled out to be plugged into an intravenous injection tube, then the needle cap 12 is separated from the retention needle 11, the tip of the retention needle 11 is pricked into a vein of a patient, intravenous injection is conveyed to the inside of the liquid collecting cavity 13 through the connecting seat 2 by the extension tube 3 to be collected, the collected injection volume is increased to drive the main body plate 142 to generate suspension, the intravenous injection enters the vein of the patient through the gap between the retention needle 11 and the connecting rod 143, and then the intravenous injection enters the inside of the liquid collecting cavity 13, the obliquely-entered injection can impact on the stress plate 141 to bring a steering force to the movable piece 14, so that the connecting rod 143 is driven to rotate at an angle in the inner cavity of the retention needle 11, the inner cavity of the detaining needle 11 is rotated in a similar stirring manner together with the limit protruding points 144, the inner cavity of the detaining needle 11 can be effectively prevented from being blocked by blood backflow or powdery medicines, before the detaining needle body 1 is used, a medical staff can separate the first sealing cap 19 from the detaining needle body 1 through threads, then take out the sealing plug 18 from the containing cavity 16, the detaining needle 11 and the liquid collecting cavity 13 are flushed with 0.9% sodium chloride solution through the through groove 17 for cleaning, the infection probability caused by pollution during the storage period of the detaining needle body 1 is reduced, the plug 181 is played back into the containing cavity 16, the limit protruding pieces 192 and the limit groove 182 are correspondingly placed and then revolve, the plug 181 is extruded and deformed, the through groove 17 is sealed, and the leakage of intravenous injection liquid during the use of the detaining needle body 1 is avoided.
The liquid stopping clamp 4 comprises a clamping plate 41, a containing hole 42 and a placing groove 43 are formed in the clamping plate 41, one end of the placing groove 43 is connected with the containing hole 42, the containing hole 42 and the placing groove 43 longitudinally penetrate through the clamping plate 41, a plurality of limit raised strips 44 are uniformly arranged on the inner wall of the placing groove 43 and used for sealing the extension tube 3, the inner diameter of the containing hole 42 is larger than the width of the placing groove 43, and the outer diameter of the extension tube 3 is matched with the containing hole 42;
As shown in fig. 1 and 8, the embodiment is specifically: after the single intravenous injection is completed, a medical staff can pull the clamping plate 41 to store the position of the extension tube 3 from the storage hole 42 to the position of the placement groove 43, limit the position of the extension tube 3 stored in the placement groove 43 through the limit raised strips 44, the soft extension tube 3 is limited by the width of the placement groove 43, the contact position of the extension tube 3 and the liquid stop clamp 4 can be clamped, the liquid collecting cavity 13 is enabled to be equal to the intravenous pressure, the blood reflux caused by pressure difference is avoided, when the intravenous injection needs to be carried out on the indwelling needle body 1 again, the extension tube 3 is only required to be pushed back to the position of the storage hole 42 again, and the extension tube 3 is restored to be in shape for carrying intravenous injection again.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
Finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides an prevent venous return and keep somewhere needle, includes keep somewhere needle body (1) and connecting seat (2), its characterized in that: an extension tube (3) is arranged between the connecting seat (2) and the indwelling needle body (1), and a liquid stopping clamp (4) is arranged on the extension tube (3);
Keep somewhere needle (1) inside and be equipped with keep somewhere needle (11), keep somewhere needle (11) outside and be equipped with needle cap (12), keep somewhere needle (1) inside and be equipped with and gather liquid cavity (13), keep somewhere needle (11) one end and gather liquid cavity (13) and link to each other, gather and be equipped with moving part (14) between inside and the keeping somewhere needle (11) inner chamber of liquid cavity (13), keep somewhere needle (1) and keep away from keeping somewhere fixed being equipped with furcation tube (15) between needle (11) one end outer wall and the extension tube (3), keep somewhere needle (1) and keep away from keeping somewhere needle (11) one end inside and be equipped with and accomodate cavity (16), accomodate and be equipped with logical groove (17) between cavity (16) and the liquid cavity (13), accomodate cavity (16) inside be equipped with sealing plug (18), keep somewhere needle (1) and keep away from keeping somewhere needle (11) one end outer wall and be equipped with first sealing cap (19).
The movable piece (14) comprises a plurality of stress plates (141), one end of each stress plate (141) is provided with a main body plate (142), the other end of each stress plate (141) is provided with a connecting rod (143), a plurality of limit protruding points (144) are uniformly arranged on the outer wall of each connecting rod (143), and the stress plates (141), the main body plates (142), the connecting rods (143) and the limit protruding points (144) are uniformly formed;
The sealing plug (18) comprises a plug (181), and a limit groove (182) is formed in the middle of the top end of the plug (181);
The first sealing cap (19) comprises a first cap shell (191), a limit lug (192) is fixedly arranged in the middle of the inner wall of the first cap shell (191), and anti-slip raised strips (193) are uniformly and fixedly arranged on the outer wall of the first cap shell (191);
The liquid stopping clamp (4) comprises a clamping plate (41), a containing hole (42) and a placing groove (43) are formed in the clamping plate (41), one end of the placing groove (43) is connected with the containing hole (42), the containing hole (42) and the placing groove (43) longitudinally penetrate through the clamping plate (41), and a plurality of limiting raised strips (44) are uniformly formed in the inner wall of the placing groove (43);
The outer diameter of the main body plate (142) is smaller than the inner diameter of the liquid collecting cavity (13), the length of the connecting rod (143) is smaller than the length of the retaining needle (11), and the total outer diameter of the connecting rod (143) and the limiting raised strips (44) is smaller than the inner diameter of the retaining needle (11).
2. An anti-venous return needle as claimed in claim 1, wherein: the connecting seat (2) is in a Y shape, one end of the connecting seat (2) is connected with the extension tube (3), and two openings at one end of the connecting seat (2) far away from the extension tube (3) are respectively provided with a second sealing cap (21).
3. An anti-venous return needle as claimed in claim 2, wherein: the second sealing cap (21) comprises a second cap shell (211), a limiting plug (212) is fixedly arranged in the middle of the inner wall of the second cap shell (211), the limiting plug (212) is made of rubber materials, the inner diameter of the second cap shell (211) is matched with the outer diameter of the connecting seat (2), and the outer diameter of the limiting plug (212) is matched with the inner diameter of the connecting seat (2).
4. An anti-venous return needle as claimed in claim 1, wherein: the inner diameter of the containing hole (42) is larger than the width of the placing groove (43), and the outer diameter of the extension tube (3) is matched with the containing hole (42).
5. An anti-venous return needle as claimed in claim 1, wherein: the sealing plug (18) is made of rubber material, and the outer diameter of the sealing plug (18) is matched with the accommodating cavity (16).
6. An anti-venous return needle as claimed in claim 1, wherein: the limiting lugs (192) are distributed in a cross shape, and the inner wall of the first cap shell (191) is connected with the outer wall of the top end of the indwelling needle body (1) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231574.9A CN110787339B (en) | 2019-12-05 | Prevent venous return needle of keeping somewhere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231574.9A CN110787339B (en) | 2019-12-05 | Prevent venous return needle of keeping somewhere |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110787339A CN110787339A (en) | 2020-02-14 |
| CN110787339B true CN110787339B (en) | 2024-09-24 |
Family
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211327427U (en) * | 2019-12-05 | 2020-08-25 | 中国人民解放军陆军军医大学第二附属医院 | Prevent venous return and keep somewhere needle |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211327427U (en) * | 2019-12-05 | 2020-08-25 | 中国人民解放军陆军军医大学第二附属医院 | Prevent venous return and keep somewhere needle |
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