CN216148046U - Central venous catheter with closed blood sampling function - Google Patents
Central venous catheter with closed blood sampling function Download PDFInfo
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- CN216148046U CN216148046U CN202122091114.XU CN202122091114U CN216148046U CN 216148046 U CN216148046 U CN 216148046U CN 202122091114 U CN202122091114 U CN 202122091114U CN 216148046 U CN216148046 U CN 216148046U
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- catheter
- central venous
- blood sampling
- blood
- injector
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- 238000010241 blood sampling Methods 0.000 title claims abstract description 31
- 239000008280 blood Substances 0.000 claims abstract description 42
- 210000004369 blood Anatomy 0.000 claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000741 silica gel Substances 0.000 claims abstract description 14
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 14
- 238000002788 crimping Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 description 15
- 239000003814 drug Substances 0.000 description 9
- 229920001296 polysiloxane Polymers 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000000642 iatrogenic effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 1
- 210000003109 clavicle Anatomy 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 210000005166 vasculature Anatomy 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides a central venous catheter with a closed blood sampling function, which comprises: the blood sampling device comprises a central venous catheter, a blood sampling catheter, a three-way valve, an injector and a silica gel sleeve; the central venous catheter comprises: the main catheter is connected with the extension catheter through the connecting handle, the length of the main catheter is 7-30 cm, and the outer diameter of the main catheter is 1-4 mm; one end of the blood sampling catheter is connected with the extension catheter, the other end of the blood sampling catheter is connected with a first connector of the three-way valve, the near end of the injector is connected with a second connector of the three-way valve, a silica gel sleeve is arranged at the tail end of the injector, and the silica gel sleeve at least seals the core rod and the outer sleeve crimping of the injector. Can effectively prevent the blood of drawing from exposing and being polluted under the environment of being susceptible through this device.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a central venous catheter with a closed blood sampling function.
Background
In clinical treatment, when a patient is subjected to blood sample collection through a central venous catheter, the obtained blood sample analysis data cannot be used clinically due to the fact that liquid medicine residues exist in collected proximal blood. Therefore, residual liquid medicine and near-end blood in the central venous catheter need to be pumped out before blood sample collection is clinically carried out, and the pumped near-end blood is exposed in a susceptible environment, so that the risk of pollution is greatly increased. In addition, in general, the extracted proximal blood with residual liquid medicine is discarded during clinical practical application and cannot be returned to the body of a patient, so that the iatrogenic blood loss complication is easily caused to the patient who needs to frequently collect blood samples.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a central venous catheter with a closed blood sampling function, and aims to solve the problem that the blood of a patient drawn through the central venous catheter is easy to be polluted.
According to an embodiment of the present invention, a central venous catheter with a closed blood sampling function is provided, which includes: the blood sampling device comprises a central venous catheter, a blood sampling catheter, a three-way valve, an injector and a silica gel sleeve; the central venous catheter comprises: the main catheter is connected with the extension catheter through the connecting handle, the length of the main catheter is 7-30 cm, and the outer diameter of the main catheter is 1-4 mm; one end of the blood sampling catheter is connected with the extension catheter, the other end of the blood sampling catheter is connected with a first connector of the three-way valve, the near end of the injector is connected with a second connector of the three-way valve, a silica gel sleeve is arranged at the tail end of the injector, and the silica gel sleeve at least seals the core rod and the outer sleeve crimping of the injector.
Wherein the proximal end of the main catheter of the central venous catheter is provided with a flexible conical tip part.
Wherein the number of the extension conduits is one or more.
Wherein, a blood sampling valve is arranged on the blood sampling conduit
Wherein, the injector is a screw injector.
According to the technical scheme, the blood sampling catheter is connected with the injector through the three-way valve, the silica gel sleeve for accommodating the injector core rod and the outer sleeve curled edge is arranged at the tail end of the injector, the injector extracts and temporarily stores the near-end blood of the patient with the residual liquid medicine, then the blood of the patient without the residual liquid medicine is collected to be used as an analysis blood sample, meanwhile, the injector is sealed, the blood in the injector can be effectively prevented from being exposed to a susceptible environment and being polluted, after the sampling is finished, the three-way valve is adjusted to turn the switch, the blood in the injector is returned to the patient, and the iatrogenic blood loss of the patient is effectively prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a schematic view of a single lumen central venous catheter with closed blood collection in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a central venous catheter in accordance with an embodiment of the present invention;
fig. 3 to 5 are schematic views of a double-lumen, three-lumen and four-lumen central venous catheter with an airtight blood collection function according to an embodiment of the present invention, respectively.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
According to an embodiment of the present application, there is provided a central venous catheter with a closed blood collection function, which at least includes, with reference to fig. 1 and 2: a central venous catheter 1, a blood sampling catheter 2, a three-way valve 3, an injector 4 and a silica gel sleeve 5.
As shown in fig. 2, the central venous catheter 1 includes: the liquid stop device comprises a main conduit 11, a connecting handle 12, an extension conduit 13 and a liquid stop clamp 15, wherein the main conduit 11 is connected with the extension conduit 13 through the connecting handle 12. The central venous catheter can be used for carrying out a large amount of rapid venous transfusion or maintaining the blood pressure of a patient in emergency treatment, and is used for puncturing through the neck or below a clavicle and placing a tube in a large vein. The main duct 11 of the present application may have a length of 7-30 cm and an outer diameter of 1-4 mm. A flexible tapered tip portion 14 is also provided at the proximal end of the main catheter 11 to facilitate catheter access to the patient's venous vasculature, reducing irritation and trauma to the patient.
The extension tube 13 is provided with a liquid stopping clip 15 for stopping the flow of liquid in the tube, and a luer 16 is provided at the tip of the extension tube 13, and the extension tube 13 is connected to the blood collection tube 2 via the luer 16.
One end of the blood collection catheter 2 is connected with the extension catheter 13, for example, the tail end of the extension catheter 13 is provided with an inner conical luer connector, the proximal end of the blood collection catheter 2 is provided with an outer conical luer connector, and the blood collection catheter 2 is connected with the extension catheter 13 through the luer connector. The other end of the blood sampling tube 2 is connected with the injector 4 through the three-way valve 3, specifically, the other end of the blood sampling tube 2 is connected with a first joint of the three-way valve 3, and a second joint of the three-way valve 3 is connected with the injector 4. And, the third joint of three-way valve 3 is provided with sclausura stifled cap 31, specifically can be the screw cap, and sclausura stifled cap 31 is used for the third joint of shutoff three-way valve 3, avoids external bacterium to pollute three-way valve 3. In some embodiments, a syringe or other conduit may be connected through the third connector of the three-way valve 3 for blood collection or fluid infusion from the patient. Wherein, the three-way valve 3 of this application is last to have a switch that turns to, and accessible switch control three-way valve 3's arbitrary two connect the intercommunication or three connect whole the intercommunication.
In the embodiment of the present invention, a blood sampling valve 6 is further sleeved or connected in series on the blood sampling conduit 3, and a blood sampling device (not shown) such as a blood sampling needle can collect blood in the blood sampling conduit 3 through the blood sampling valve 6.
The end of the syringe 4 is provided with a silicone sleeve 5, and the silicone sleeve 5 is used for sealing a core rod 41 (or called plunger rod) and an outer sleeve crimping 42 of the syringe 4. When the core rod 41 of the syringe is pulled to draw blood, the silicone sleeve 5 accommodates the sealing core rod 41 and the outer sheath turned edge 42 therein, and the silicone sleeve 5 can prevent the core rod 41 and the outer sheath turned edge 42 from contacting with the outside air, thereby preventing the outside bacteria from being brought into the syringe 4, and further preventing the blood drawn by the syringe 4 from being polluted when exposed to a susceptible environment. The silica gel sleeve has the function of preventing external bacteria from polluting blood in the injector, so the silica gel sleeve needs to at least seal the core rod and the outer sleeve crimping of the injector, and further, the silica gel sleeve can also seal the outer sleeve or a part of the outer sleeve of the injector.
In some embodiments of the present application, the syringe 4 may be a screw-type syringe, which may have a volume of 10-30 ml.
When the blood sample is collected in actual operation, the residual liquid medicine in the central venous catheter and the near-end blood with the residual liquid medicine are firstly extracted and stored through the injector 4, after a preset amount of blood is extracted, the blood without the residual liquid medicine is collected through the blood collecting valve 6 by the blood collecting needle to be used as an analysis blood sample, and after the sampling is finished, the three-way valve steering switch is adjusted, the near-end blood with the residual liquid medicine stored in the injector 4 is returned to the patient, so that the iatrogenic blood loss of the patient is prevented.
In the embodiment shown in fig. 1, the extension duct 13 is one in number. Referring to fig. 3 to 5, in other embodiments, the number of extension pipes 13 may be two, three, or four, etc. When the number of the extension tubes 13 is plural, the blood collection tube 2 is connected to one of the extension tubes. The plurality of extension conduits are independent and do not interfere with each other. The liquid stopping clip which can block the liquid in the conduit from flowing is respectively arranged on each extension conduit, and the tail end of each extension conduit is also respectively provided with a luer connector which can be externally connected to a drug delivery device, a blood drawing device or a pressure measuring device and the like.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. A central venous catheter with a closed blood sampling function is characterized by comprising: the blood sampling device comprises a central venous catheter, a blood sampling catheter, a three-way valve, an injector and a silica gel sleeve;
the central venous catheter comprises: the main catheter is connected with the extension catheter through the connecting handle, the length of the main catheter is 7-30 cm, and the outer diameter of the main catheter is 1-4 mm;
one end of the blood sampling catheter is connected with the extension catheter, the other end of the blood sampling catheter is connected with a first connector of the three-way valve, the near end of the injector is connected with a second connector of the three-way valve, a silica gel sleeve is arranged at the tail end of the injector, and the silica gel sleeve at least seals the core rod and the outer sleeve crimping of the injector.
2. The central venous catheter of claim 1 wherein the proximal end of the main catheter of the central venous catheter is provided with a flexible tapered tip portion.
3. The central venous catheter of claim 1, wherein the number of extension catheters is one or more.
4. The central venous catheter of claim 1, wherein a blood collection valve is disposed on the blood collection catheter.
5. The central venous catheter of claim 1 wherein the syringe is a luer-lock syringe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122091114.XU CN216148046U (en) | 2021-09-01 | 2021-09-01 | Central venous catheter with closed blood sampling function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122091114.XU CN216148046U (en) | 2021-09-01 | 2021-09-01 | Central venous catheter with closed blood sampling function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216148046U true CN216148046U (en) | 2022-04-01 |
Family
ID=80840975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122091114.XU Active CN216148046U (en) | 2021-09-01 | 2021-09-01 | Central venous catheter with closed blood sampling function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216148046U (en) |
-
2021
- 2021-09-01 CN CN202122091114.XU patent/CN216148046U/en active Active
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