CN221206364U - Safety indwelling needle for preventing blood return and overflow - Google Patents
Safety indwelling needle for preventing blood return and overflow Download PDFInfo
- Publication number
- CN221206364U CN221206364U CN202322353397.XU CN202322353397U CN221206364U CN 221206364 U CN221206364 U CN 221206364U CN 202322353397 U CN202322353397 U CN 202322353397U CN 221206364 U CN221206364 U CN 221206364U
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- Prior art keywords
- needle
- seat
- rear end
- valve core
- valve
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- 239000008280 blood Substances 0.000 title claims abstract description 37
- 210000004369 blood Anatomy 0.000 title claims abstract description 37
- 238000009423 ventilation Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 238000001802 infusion Methods 0.000 description 11
- 210000004204 blood vessel Anatomy 0.000 description 5
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 206010015866 Extravasation Diseases 0.000 description 1
- 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 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000036251 extravasation Effects 0.000 description 1
- 229960002897 heparin Drugs 0.000 description 1
- 229920000669 heparin Polymers 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides a safe indwelling needle for preventing blood return and overflow, which comprises: the device comprises a catheter, a catheter seat, a valve core tube, a valve plate, a needle tube, a needle seat and a tail cap; the rear end of the catheter is connected to the catheter seat; the valve core pipe is accommodated in the guide pipe seat, the valve core pipe is communicated with the guide pipe through the guide pipe seat, the rear end of the valve core pipe extends into the valve plate, the rear end of the valve plate is arranged in a closed mode, and when the valve plate slides along the valve core pipe, the rear end of the valve core pipe can puncture the closed end of the valve plate and extend out; the front end of the needle tube sequentially passes through the valve plate and the valve core tube and stretches into the guide tube. In the utility model, the rear end of the valve block is arranged in a closed manner, and when the valve block slides along the valve core pipe, the rear end of the valve core pipe can puncture the closed end of the valve block and extend out. Therefore, the valve plate can be kept closed when the steel needle is withdrawn after the puncture is completed, so that the non-return blood is prevented from overflowing; when transfusion is needed, the valve plate can move forward under the action of the transfusion connector so that the valve core tube is exposed, and further subsequent transfusion is facilitated.
Description
Technical Field
The utility model relates to an indwelling needle, in particular to a safety indwelling needle capable of preventing blood return from overflowing.
Background
The indwelling needle includes a flexible catheter/cannula which can be indwelled within a blood vessel, and a stainless steel puncture guide needle. When in use, the steel needle punctures the guide tube and enters the blood vessel, and after the puncture is completed, the steel needle is withdrawn, and the guide tube is left in the blood vessel, so that the infusion treatment is carried out. The use of the indwelling needle can reduce the pain of patients caused by repeated venipuncture, is convenient for clinical medication, especially for emergency medication of critical patients, and can reduce the workload of nurses and the repeated puncture pain of patients. However, when the existing indwelling needle is used for puncturing and withdrawing the steel needle, the existing indwelling needle is easy to cause blood return and overflow due to the problem of pressure. Thus, spilled blood may present a risk of infection to the healthcare worker. Therefore, in view of the above problems, it is necessary to propose a further solution.
Disclosure of utility model
The utility model aims to provide a safe indwelling needle capable of preventing blood return from overflowing, so as to overcome the defects in the prior art.
In order to achieve the above object, the present utility model provides a safety indwelling needle for preventing back-flow and overflow, comprising: the device comprises a catheter, a catheter seat, a valve core tube, a valve plate, a needle tube, a needle seat and a tail cap;
the rear end of the catheter is connected to the catheter seat;
the valve core pipe is accommodated in the guide pipe seat, the valve core pipe is communicated with the guide pipe through the guide pipe seat, the rear end of the valve core pipe extends into the valve block, the rear end of the valve block is arranged in a closed mode, and when the valve block slides along the valve core pipe, the rear end of the valve core pipe can puncture the closed end of the valve block and extend out;
The front end of the needle tube sequentially penetrates through the valve plate and the valve core tube and stretches into the catheter, the rear end of the needle tube is connected to the needle seat, the front end of the needle seat is matched with the rear end of the catheter seat, and the rear end of the needle seat is provided with the tail cap.
As an improvement of the safety indwelling needle for preventing blood return from overflowing, the front end of the needle seat is provided with a cantilever, and the rear end of the catheter seat is provided with a clamping groove matched with the cantilever.
As an improvement of the safety indwelling needle for preventing blood return from overflowing, the number of the two cantilevers is two, and the two cantilevers symmetrically extend out of the front end face of the needle seat integrally in a central way; the clamping grooves are arranged on the outer side wall of the catheter seat in a central symmetry mode.
As an improvement of the safety indwelling needle for preventing blood return from overflowing, the front end of the valve core tube is provided with a first step which is suitable for axial limiting of the valve core tube, and the first step is propped against the inner side wall of the catheter seat.
As an improvement of the safety indwelling needle for preventing blood return from overflowing, the rear end of the valve core tube is provided with a tip shape which is suitable for puncturing the closed end of the valve plate.
As an improvement of the safety type detaining needle for preventing blood return from overflowing, the rear end of the valve core tube is further provided with a second step, and the second step limits the valve plate when the rear end of the valve core tube stretches out.
As an improvement of the safety indwelling needle for preventing blood return from overflowing, the inside of the tail cap is hollow, the inside of the tail cap is filled with a ventilation column, and the rear end opening of the tail cap is provided with a ventilation film; the needle seat is also provided with a blood return observation window.
As an improvement of the safety type detaining needle for preventing blood return from overflowing, the safety type detaining needle for preventing blood return from overflowing further comprises: an anti-needling elastic sheet and an elastic sheet seat; the anti-needling elastic sheet is accommodated in the elastic sheet seat, and the whole of the anti-needling elastic sheet and the elastic sheet seat is positioned in the needle seat; when the needle seat drives the needle tube to be pulled out of the catheter, the needle penetration preventing elastic sheet stays at the needle point of the needle tube.
Compared with the prior art, the utility model has the beneficial effects that: the safety indwelling needle for preventing blood return from overflowing is provided with a valve core tube and a valve plate. The rear end of the valve block is sealed, and when the valve block slides along the valve core pipe, the rear end of the valve core pipe can puncture the sealed end of the valve block and extend out. Therefore, the valve plate can be kept closed when the steel needle is withdrawn after the puncture is completed, so that the non-return blood is prevented from overflowing; when transfusion is needed, the valve plate can move forward under the action of the transfusion connector so that the valve core tube is exposed, and further subsequent transfusion is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic plan view of an embodiment of a safety indwelling needle for preventing back-flow and extravasation according to the present utility model;
FIG. 2 is a section E-E of the indwelling needle of FIG. 1;
FIG. 3 is an enlarged plan view of a portion of FIG. 2;
Fig. 4 is a schematic view showing a state in which a needle tip is accommodated in a spring sheet after a needle tube of the indwelling needle in fig. 1 is pulled out.
Detailed Description
The present utility model will be described in detail with reference to the following embodiments, but it should be understood that these embodiments are not limiting, and functional, method, or structural equivalents and alternatives thereof by those skilled in the art are within the scope of the present utility model.
As shown in fig. 1 to 3, the present utility model provides a safety indwelling needle for preventing back-flow and overflow, comprising: catheter 10, catheter hub 20, valve cartridge tube 30, valve plate 40, needle cannula 50, needle hub 60, and tail cap 70.
Wherein, the catheter 10 is used as an infusion channel left in the blood vessel of a human body, and the rear end of the catheter 10 is connected to the catheter seat 20 by a rivet 11.
The valve core tube 30 is used to establish an infusion channel. Specifically, the spool pipe 30 is accommodated in the catheter holder 20, and the spool pipe 30 communicates with the catheter 10 through the catheter holder 20. In order to facilitate the installation and fixation of the valve core tube 30, the front end of the valve core tube 30 is provided with a first step 31 suitable for the axial limit of the valve core tube 30, and the first step 31 abuts against the inner side wall of the catheter seat 20.
The rear end of the valve core tube 30 extends into the valve block 40, the rear end of the valve block 40 is closed, and when the valve block 40 slides along the valve core tube 30, the rear end of the valve core tube 30 can puncture the closed end of the valve block 40 and extend out. When the needle tube 50 and the needle seat 60 thereof are pulled out, the safety indwelling needle for preventing blood return from overflowing can be externally connected with an infusion connector for convenient infusion. At this time, the infusion set is attached to the opening at the rear end of the catheter holder 20 when the needle tube 50 is pulled out of the catheter 10. In one embodiment, the infusion connector is one of a heparin cap, a needleless connector, and a male luer connector. In this way, the valve plate 40 can be kept closed when the steel needle is withdrawn after the puncture is completed, so that the blood is prevented from overflowing; when infusion is needed, the valve plate 40 can move forward under the action of the infusion connector so that the valve core tube 30 is exposed, and further subsequent infusion is facilitated.
Therefore, the problem of overflow of blood return caused by pressure difference in the prior art is solved, and further, the health of medical staff is effectively protected. Meanwhile, in order to limit the valve plate 40, the rear end of the valve core tube 30 is further provided with a second step 32, and the second step 32 limits the valve plate 40 when the rear end of the valve core tube 30 extends out. That is, the valve core tube 30 slides along the valve core tube 30 under the pushing of the infusion connector, when the end surface of the opening formed by puncturing passes over the second step 32, the opening formed by puncturing contracts and the end surface of the opening abuts against the second step 32, so that the limit of the valve plate 40 is realized.
Further, in order to facilitate the extension of the rear end of the cartridge tube 30, the rear end of the cartridge tube 30 is provided in a tip shape adapted to pierce the closed end of the valve sheet 40. Specifically, the end face of the rear end of the spool pipe 30 may be provided as a slope. At this time, the slope forms a protruding tip structure at the rear end of the cartridge tube 30.
Needle cannula 50 is used to drive catheter 10 into a blood vessel of a human body. Specifically, the front end of the needle tube 50 sequentially passes through the valve plate 40 and the valve core tube 30 and extends into the catheter 10, the rear end of the needle tube 50 is connected to the needle holder 60, and the front end of the needle holder 60 is matched with the rear end of the catheter holder 20. In order to make the catheter hub 20 well fit with the needle hub 60, the front end of the needle hub 60 is provided with a cantilever 61, and the rear end of the catheter hub 20 is provided with a clamping groove matched with the cantilever 61.
In one embodiment, the number of the cantilevers 61 is two, and the two cantilevers 61 integrally extend from the front end surface of the needle holder 60 in a central symmetry manner; the clamping grooves are arranged on the outer side wall of the catheter seat 20 in a central symmetry mode. At this time, the two cantilevers 61 at the front end of the needle holder 60 can be extended into the corresponding catching grooves.
As shown in fig. 4, the safety indwelling needle for preventing the medical staff from being scratched when the needle tube 50 is withdrawn, further comprises: an anti-needling elastic sheet 80 and an elastic sheet seat 90. Wherein, the anti-needling elastic sheet 80 is accommodated in the elastic sheet seat 90, and the entirety of the anti-needling elastic sheet 80 and the elastic sheet seat 90 is positioned in the needle stand 60; when the needle stand 60 drives the needle tube 50 to be pulled out of the catheter 10, the anti-needling elastic sheet 80 stays at the needle point of the needle tube 50.
In addition, the rear end of the needle hub 60 is provided with a tail cap 70. The inside of the tail cap 70 is provided in a hollow manner, the inside of the tail cap 70 is filled with a ventilation column 91, and the rear end opening of the tail cap 70 is provided with a ventilation membrane 92. At the same time, a blood return observation window 62 is also arranged on the needle seat 60. Thus, by providing the air-permeable column 91 and the air-permeable film 92, blood can flow into the needle holder 60, and then the blood flowing out is observed through the blood return observation window 62, so that the medical staff can confirm that the puncture is successful. When the puncture is completed and the steel needle is withdrawn, the needle tube 50 is separated from the valve plate 40, and the closed end of the valve plate 40 can be kept closed so as to prevent the non-return blood from overflowing.
In summary, the safety indwelling needle for preventing blood return from overflowing is provided with the valve core tube and the valve plate. The rear end of the valve block is sealed, and when the valve block slides along the valve core pipe, the rear end of the valve core pipe can puncture the sealed end of the valve block and extend out. Therefore, the valve plate can be kept closed when the steel needle is withdrawn after the puncture is completed, so that the non-return blood is prevented from overflowing; when transfusion is needed, the valve plate can move forward under the action of the transfusion connector so that the valve core tube is exposed, and further subsequent transfusion is facilitated.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. The utility model provides a prevent back blood excessive safe type keep somewhere needle which characterized in that, prevent back blood excessive safe type keep somewhere needle includes: the device comprises a catheter, a catheter seat, a valve core tube, a valve plate, a needle tube, a needle seat and a tail cap;
the rear end of the catheter is connected to the catheter seat;
the valve core pipe is accommodated in the guide pipe seat, the valve core pipe is communicated with the guide pipe through the guide pipe seat, the rear end of the valve core pipe extends into the valve block, the rear end of the valve block is arranged in a closed mode, and when the valve block slides along the valve core pipe, the rear end of the valve core pipe can puncture the closed end of the valve block and extend out;
The front end of the needle tube sequentially penetrates through the valve plate and the valve core tube and stretches into the catheter, the rear end of the needle tube is connected to the needle seat, the front end of the needle seat is matched with the rear end of the catheter seat, and the rear end of the needle seat is provided with the tail cap.
2. The safety indwelling needle for preventing blood return and overflow according to claim 1, wherein a cantilever is arranged at the front end of the needle seat, and a clamping groove matched with the cantilever is arranged at the rear end of the catheter seat.
3. The safety indwelling needle for preventing back-flow and overflow according to claim 2, wherein said two cantilevers are integrally protruded from the front end face of said needle holder in central symmetry; the clamping grooves are arranged on the outer side wall of the catheter seat in a central symmetry mode.
4. The safety indwelling needle for preventing blood return and overflow according to claim 1, wherein a first step suitable for axial limiting of the valve core tube is arranged at the front end of the valve core tube, and the first step abuts against the inner side wall of the catheter seat.
5. The safety indwelling needle for preventing blood back-flow according to claim 1, wherein the rear end of said cartridge tube is provided in a tip shape adapted to pierce the closed end of said valve sheet.
6. The safety indwelling needle for preventing blood return and overflow according to claim 5, wherein a second step is further provided at the rear end of the valve core tube, and the second step limits the valve plate when the rear end of the valve core tube extends out.
7. The safety indwelling needle for preventing blood return and overflow according to claim 1, wherein the tail cap is internally hollow, the tail cap is internally filled with a ventilation column, and a ventilation membrane is arranged at the rear end opening of the tail cap; the needle seat is also provided with a blood return observation window.
8. The back-flow overflow preventing safety type indwelling needle according to claim 1, further comprising: an anti-needling elastic sheet and an elastic sheet seat; the anti-needling elastic sheet is accommodated in the elastic sheet seat, and the whole of the anti-needling elastic sheet and the elastic sheet seat is positioned in the needle seat; when the needle seat drives the needle tube to be pulled out of the catheter, the needle penetration preventing elastic sheet stays at the needle point of the needle tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322353397.XU CN221206364U (en) | 2023-08-31 | 2023-08-31 | Safety indwelling needle for preventing blood return and overflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322353397.XU CN221206364U (en) | 2023-08-31 | 2023-08-31 | Safety indwelling needle for preventing blood return and overflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221206364U true CN221206364U (en) | 2024-06-25 |
Family
ID=91567529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322353397.XU Active CN221206364U (en) | 2023-08-31 | 2023-08-31 | Safety indwelling needle for preventing blood return and overflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221206364U (en) |
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2023
- 2023-08-31 CN CN202322353397.XU patent/CN221206364U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |