CN117653104A - An improved arteriovenous catheter blood collection device - Google Patents
An improved arteriovenous catheter blood collection device Download PDFInfo
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- CN117653104A CN117653104A CN202410106230.XA CN202410106230A CN117653104A CN 117653104 A CN117653104 A CN 117653104A CN 202410106230 A CN202410106230 A CN 202410106230A CN 117653104 A CN117653104 A CN 117653104A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150992—Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; Blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings or valves
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Abstract
本发明的改良的动静脉置管采血器，包括抽注注射器和抽血注射器，抽注注射器的针筒前端设置有第一插管，第一插管用于与肝素帽接头或三通管上相连接，第一插管上固定有支管，第一插管上设置有第一阀门；抽血注射器的针筒前端设置有与支管相连接的第二插管；抽注注射器用于将静脉置管或动脉置管中的封管液和稀释混合液抽出，抽血注射器经支管对患者血管中的静脉或动脉中的血液进行抽取。本发明的改良的动静脉置管采血器，与现有需要利用3个注射器进行动脉或静脉置管进行血液标本采集相比较，操纵步骤更为简洁、合理，既避免了采血过程弃置前段稀释血液导致血液浪费，又大大降低了血液性感染、污染的风险。
The improved arteriovenous catheter blood collection device of the present invention includes a withdrawal syringe and a blood withdrawal syringe. The front end of the syringe of the withdrawal syringe is provided with a first cannula. The first cannula is used to connect with the heparin cap or the tee tube. Connected, a branch pipe is fixed on the first cannula, and a first valve is provided on the first cannula; the front end of the needle barrel of the blood drawing syringe is provided with a second cannula connected to the branch pipe; the injection syringe is used to place the vein The sealing solution and dilution mixture in the tube or arterial catheter are extracted, and the blood draw syringe draws blood from the vein or artery in the patient's blood vessel through the branch tube. Compared with the existing arterial or venous catheterization blood sample collection device that requires the use of three syringes for blood sample collection, the improved arteriovenous catheterization blood collection device of the present invention has simpler and more reasonable operating steps, which avoids the need to discard the diluted blood in the front section of the blood collection process. This results in a waste of blood and greatly reduces the risk of blood infection and contamination.
Description
Technical Field
The invention relates to a hemostix, in particular to an improved arteriovenous catheterization hemostix.
Background
Arteriovenous catheterization is a common technical means for critical patients in clinic, and comprises arterial catheterization for invasive pressure monitoring and venous catheterization for transfusion. The arterial catheterization is mainly used for monitoring invasive arterial blood pressure and also can be used for collecting blood and qi of a patient for blood item evaluation after the three-way pipe is connected in the middle of the pipeline; the venous catheterization device can be used for collecting venous blood samples under special conditions. In general, in the process of collecting a blood sample through arterial catheterization or central venous catheterization, 5ml to 10ml (or other types) of syringe is usually used for drawing out normal saline used for flushing or sealing a tube in a pipeline, and in order to avoid detection errors caused by sample dilution, a part of diluted blood needs to be further drawn out, then a new syringe or arterial blood taking needle is used for collecting the blood sample, and finally, the pipeline is flushed and sealed by the new syringe.
However, the existing blood sample collection of the arteriovenous catheterization has the following defects: (1) After the original normal saline in the pipeline is sucked by the first injector, the diluted blood at the front end of the part needs to be continuously sucked for discarding, the diluted blood is recovered to increase the blood source infection risk, and the clinical blood is generally 5ml, so that the detection error caused by sample dilution is avoided, but the waste of the blood is caused; (2) The whole blood sample collection process requires repeated operation of a plurality of syringes, and great risk of blood-borne infection and pollution exists; (3) At present, no related molding product exists clinically, a plurality of syringes are needed in the whole blood sampling process, even arterial puncture blood sampling needles are matched for operation, and medical consumables are wasted.
Disclosure of Invention
The invention provides an improved arteriovenous catheter hemostix for overcoming the defects of the technical problems.
The invention relates to an improved arteriovenous catheterization hemostix, which comprises a drawing injection syringe and a blood drawing syringe, wherein the drawing injection syringe and the blood drawing syringe are both composed of a needle cylinder, a handle and a piston, the piston is positioned in an inner cavity of the needle cylinder, and the inner end of the handle is fixed with the piston; the method is characterized in that: the front end of the needle cylinder of the drawing and injecting syringe is provided with a first cannula which is used for being connected with a heparin cap joint on a vein catheterization or an outer cylinder pipe on a three-way pipe on an artery catheterization, a branch pipe is fixed on the first cannula, and a first valve for controlling the on-off state of the first cannula and the branch pipe is arranged on the first cannula; the front end of the needle cylinder of the blood drawing injector is provided with a second cannula connected with the branch pipe, and the second cannula is plugged by a second detachable sealing cap;
the blood drawing and injecting injector is used for drawing out the tube sealing liquid and the diluted mixed liquid in the vein tube or the artery tube, the blood drawing injector is used for drawing blood in veins or arteries of a patient through the branch tube, and the drawing and injecting injector is used for sequentially re-injecting the drawn diluted mixed liquid and tube sealing liquid into the vein tube or the artery tube after the blood drawing of the patient is finished.
According to the improved arteriovenous catheterization hemostix, the sponge barrel for preventing turbulence phenomenon is arranged in the needle cylinder of the aspiration injection syringe, the sponge barrel is fixed on the piston in the needle cylinder, the center of the sponge barrel is provided with the storage cavity for storing the tube sealing liquid, the outer end of the sponge barrel is fixed with the circular baffle for sealing the opening of the storage cavity, and the diameter of the baffle is larger than that of the storage cavity and smaller than that of the needle cylinder.
The invention relates to an improved arteriovenous catheterization hemostix, which comprises a limit clamping plate for preventing a piston in a drawing and injecting syringe from escaping from a syringe, wherein two lug plates are fixed at the tail end of the syringe of the drawing and injecting syringe, a groove for clamping on the lug plates is formed in the limit clamping plate, an arc-shaped gap matched with the outer surface of the syringe is formed in the limit clamping plate, and a central gap through which a convex rib on a handle passes is formed in the limit clamping plate.
According to the improved arteriovenous catheterization hemostix, the drawing injection syringe, the blood drawing syringe, the limiting clamping plate and the second sealing cap are all wrapped in the sterile second sealing bag.
The external thread is arranged on the outer surface of the second cannula of the blood drawing syringe and is coated with an anticoagulation coating, and the internal thread is arranged on the inner surface of the second sealing cap and is coated with an anticoagulation coating; the inner surface of the branch pipe is provided with internal threads matched with external threads on the second cannula.
The beneficial effects of the invention are as follows: the improved arteriovenous catheter hemostix is provided with the infusion syringe and the blood drawing syringe, the front end of the infusion syringe is provided with the first cannula and the branch pipe, the first cannula is provided with the first valve, the second cannula on the infusion syringe is used for being connected with the branch pipe on the infusion syringe, in the process of collecting blood samples by utilizing the existing arterial catheter or venous catheter on a patient, the first cannula at the front end of the infusion syringe is firstly inserted on a heparin cap joint on the arterial catheter or on an outer bobbin of a three-way pipe of the arterial catheter, then the infusion syringe is used for extracting a catheter sealing liquid (physiological saline) and a dilution mixed liquid (a mixed liquid of the physiological saline and blood) in a blood vessel of the patient, then the second cannula on the infusion syringe is connected with the branch pipe on the infusion syringe, the first valve is opened, the patient is not diluted by the infusion syringe to be used for taking out blood samples, and then the temporary storage syringe is inserted into the arterial catheter or the arterial catheter to be more polluted by the blood, and the whole blood is more reasonable compared with the arterial catheter or the arterial catheter, and the blood is more convenient to be placed in the process of collecting blood samples, and the blood is more polluted by the arterial catheter or the arterial catheter is more than the arterial catheter or is needed to be placed in the process for the arterial catheter to be placed for the arterial catheter or is more placed for the blood is more convenient to be placed.
Further, a sponge cylinder connected with a piston is arranged in a needle cylinder of the drawing and injecting syringe, and a storage cavity is formed in the center of the sponge cylinder, so that in the process of drawing and injecting the sealing liquid in an arterial tube or a vein tube and blood extraction of the drawing and injecting syringe, the sealing liquid in the vein tube and the artery tube is firstly extracted and stored in the storage cavity in the center of the sponge cylinder and the sponge cylinder, and the sealing liquid stored in the sponge cylinder and a baffle piece covering the surface of the sponge cylinder are prevented from being influenced by turbulent flow of the diluting mixed liquid entering the needle cylinder cavity of the drawing and injecting syringe, so that the mixing of the diluting mixed liquid formed by mixing the inner sealing liquid with the blood and the sealing liquid is prevented, and in the process of reinjection, the sealing effect is realized again by the sealing liquid finally injected into the vein tube and the artery tube, and the problem that the sealing liquid needs to be reinjected in the existing blood sampling process is solved.
Further, by arranging the limiting clamping plate on the needle cylinder of the drawing and injecting injector, the piston is prevented from being ejected out of the inner cavity of the needle cylinder under the action of arterial or venous pressure, and smooth extraction of tube sealing liquid and blood pressure in the vein or arterial catheterization by using the drawing and injecting injector is ensured.
Drawings
FIG. 1 is a schematic view of a conventional arterial blood lancet;
FIG. 2 is a view showing the state of use of a conventional intravenous catheter;
FIG. 3 is a state of use diagram of a conventional arterial catheter;
FIG. 4 is a schematic view of an improved arteriovenous catheterization blood collector in accordance with the present invention;
FIG. 5 is a schematic view of the structure of the present invention after the limiting clip and the needle cylinder are assembled together;
FIG. 6 is a schematic diagram of a limiting clip according to the present invention;
FIG. 7 is a view of the syringe of the present invention in use with an intravenous catheter;
FIG. 8 is a state diagram of the blood drawing syringe and the infusion syringe of the present invention in use with an intravenous catheter;
FIG. 9 is a state diagram of the syringe of the present invention after the completion of the blood drawing and the examination;
fig. 10 is a state diagram of the blood drawing syringe and the injection syringe of the present invention when used in combination with an arterial catheter.
In the figure: 1 arterial blood taking needle, 2 plugging block, 3 first sealing cap, 4 needle head, 5 needle cap and 6 first sealing bag; 7 patients, 8 vein catheters, 9 first heparin caps, 10 heparin cap connectors, 11 artery catheters, 12 physiological saline bags, 13 communicating pipes, 14 three-way pipes and 15 second heparin caps; the device comprises a syringe body, a blood drawing and injecting syringe, a blood drawing syringe, a limiting clamping plate, a sealing cap, a sealing bag, a needle cylinder, a handle, a piston, a sponge cylinder, a storage cavity, a baffle plate, a first cannula, a branch tube, a first valve, a second cannula, a second valve, a barrel, a lug plate, a central notch, a groove, a sealing liquid, a diluting mixed liquid, blood and an arc notch.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, a schematic structural diagram of an existing arterial blood taking needle is provided, an arterial blood taking needle 1, a plugging block 2 and a first sealing cap 3 are packaged in a first sealing bag 6, a needle head 4 is arranged at the front end of the arterial blood taking needle 1, a needle cap 5 is arranged at the periphery of the needle head 4, and the needle cap 5 is used for wrapping the needle head 4 so as to prevent the needle head 4 from hurting people. The arterial blood taking needle 1 is used for arterial puncture blood taking, the blocking block 2 is used for blocking the needle head 4 immediately after blood taking, and the needle cap 5 is used for replacing the needle head to block the arterial blood taking needle 1 for blood sample examination. Arterial lancet 1, after removal of needle 4, may also be used to collect a blood sample via venous catheter 8 or arterial catheter 11.
As shown in fig. 2, a state of use diagram of the existing intravenous catheter is given, the intravenous catheter 8 is shown placed in a patient's vein for infusion, and the intravenous catheter 8 can be used to collect a blood sample. The tail end of the vein catheterization 8 is provided with a heparin cap joint 10, and in order to realize the blocking of the heparin cap 10, the heparin cap joint 10 is provided with a first heparin cap 9; due to the existence of the first heparin cap 9, the intravenous catheter 8 can be used for transfusion in a puncture way, or the first heparin cap 9 is detached to connect the syringe with the heparin cap joint 10 for injection or liquid pumping operation.
In the existing blood collection process through the intravenous catheter 8, firstly, a syringe is used to draw out the catheter sealing liquid 36 and a certain amount (usually 5 ml) of blood in the intravenous catheter 8, the drawn blood is mixed with the catheter sealing liquid 36 to form a diluted mixed liquid 37, then, the arterial blood taking needle 1 or a common syringe is used to draw out undiluted blood 38 for inspection, then, a new catheter sealing liquid is injected into the intravenous catheter 8, and the drawn catheter sealing liquid 36 and the diluted mixed liquid 37 are often discarded. Therefore, the collection of each blood sample can cause waste of about 5ml of blood, and because 3 infusion sets are adopted, the blood sample can be plugged and pulled out from the vein catheterization 8 for 3 times, and the risk of blood infection and pollution is high.
As shown in fig. 3, a state diagram of the use of the existing arterial catheterization is given, the arterial catheterization 11 is placed in an artery of the patient 7, a physiological saline bag 12 is arranged in the arterial catheterization 11, the physiological saline bag 12 is communicated with the front end of the arterial catheterization 11 through a communicating pipe 13, and the physiological saline bag 12 is connected with a pressure monitoring device through a pipeline. The communicating pipe 13 is provided with a three-way pipe 14, the three-way pipe 14 is provided with an outer cylinder pipe 32 which can be communicated with the outside, and the three-way pipe 14 is provided with a second valve 31 for controlling the on-off state of the three-way pipe 14. Normally, the front end of the arterial catheter 11 is communicated with the physiological saline bag 12 at the rear end through a tee 14.
When blood collection is required through the arterial catheter 11, the front end of the arterial catheter 11 is communicated with the outer barrel 32 by rotating the second valve 31, and then the second heparin cap 15 on the outer barrel 32 is detached for blood sample collection. It can be seen that there is also a waste of about 5ml of blood and a high risk of blood-borne infection, contamination by the existing blood sample collection methods. Thus, an improved arteriovenous catheterization hemostix of the present invention as shown in FIG. 4 is presented.
As shown in fig. 4, an improved arteriovenous catheter hemostix of the present invention is provided, which is composed of a drawing-injection syringe 16 and a drawing-blood syringe 17, wherein the drawing-injection syringe 16 and the drawing-blood syringe 17 are composed of a syringe 21, a handle 22 and a piston 23, the piston 23 is arranged in an inner cavity of the syringe 21, and the inner end of the handle 22 is fixedly connected with the piston 23. Unlike existing syringes are: the front end of the drawing and injecting syringe 16 is provided with a first cannula 27, the inner cavity of the first cannula 27 is communicated with the inner cavity of the syringe 21, and the inner cavity of the drawing and injecting syringe 16 is communicated with the outside through the inner cavity of the first cannula 27. The first cannula 27 is connected with a branch pipe 28, the inner cavity of the branch pipe 28 is communicated with the inner cavity of the first cannula 27, the first cannula 27 is provided with a first valve 29, and the first valve 29 is used for controlling the on-off of the first cannula 27 and the branch pipe 28. When the handle of the first valve 29 points to the direction of the branch pipe 28, the branch pipe 28 is in a disconnected state, and the inner cavity of the syringe 21 is communicated with the outside through the first cannula 27, at this time, the drawing and injecting syringe 16 is used for drawing the sealing liquid 36, the diluting mixed liquid 37 and a small amount of blood 38 through the first cannula 27; when the handle of the first valve 29 is directed toward the cylinder 21, the first cannula 27 is in the closed state, i.e., the cavity of the cylinder 21 of the syringe 16 is closed from the outside, and the branch tube 28 is in communication with the front end of the first cannula 27, and at this time, the operation of drawing blood 38 through the branch tube 28 is performed.
The first cannula 27 at the front end of the infusion syringe 16 is adapted to connect with the heparin cap adapter 10 on the intravenous catheter 8 and with the outer barrel 32 on the tee 14 on the arterial catheter 11. The front end of the illustrated blood drawing syringe 17 is provided with a second cannula 30, the second cannula 30 being adapted to connect with a manifold 28 on the blood drawing syringe 16.
Since turbulence is generated in the fluid entering the cylinder 21 during the process of injecting the catheter sealing fluid 36 and the diluted mixed fluid 37 (formed by mixing the catheter sealing fluid 36 and blood) into the vein catheter 8 or the artery catheter 11 by the syringe 16, the turbulence generation may cause the mixing of the catheter sealing fluid 36 (physiological saline) and the blood, and if the catheter sealing fluid 36 extracted by the syringe 16 is completely mixed with the blood, the extracted fluid will cause no catheter sealing fluid 36 in the vein catheter 8 and the artery catheter 11 when the extracted fluid is injected again, so that a clean catheter sealing effect is not achieved. Therefore, the syringe 21 of the drawing and injecting injector 16 is provided with the sponge tube 24, the sponge tube 24 is fixed on the piston 23, the sponge tube 24 can absorb part of the tube sealing liquid, meanwhile, the storage cavity 25 is formed in the center of the sponge tube 24, the outer end of the sponge tube 24 is fixed with the round baffle 26, the baffle 26 is used for sealing the opening of the storage cavity 25, the diameter of the baffle 26 is larger than the inner diameter of the storage cavity 25, and the diameter of the baffle 26 is smaller than the inner diameter of the syringe 21, so that an annular channel for the tube sealing liquid 36 to enter is formed between the baffle 26 and the inner wall of the syringe 21.
In this way, during the process of sucking the lock liquid 36 and the diluted mixture liquid 37 by the syringe 17, the influence of turbulence on the lock liquid in the sponge tube 24 and the storage chamber 25 is avoided due to the presence of the sponge tube 24 and the baffle 26, and therefore, when the lock liquid 36 in the venous catheter 8 or the arterial catheter 11 first enters the syringe 21, it is stored in the storage chamber 25 in the centers of the sponge tube 24 and the sponge tube 24. During reinjection, the tube sealing liquid 36 in the sponge tube 24 and the storage cavity 25 also finally enters the vein tube 8 and the artery tube 11, so that the tube sealing effect in the reinjection process is realized, and the blood source infection risk is reduced by the reinjection, so that the waste of blood discarding in the past is avoided, the tube sealing operation is realized, and the secondary tube sealing operation is avoided.
The improved arteriovenous catheterization hemostix further comprises a limiting clamping plate 18 and a second sealing cap 19, the second sealing cap 19 is used for sealing a second cannula 30 of the hemospast 17, external threads are arranged on the second cannula 30, internal threads matched with the external threads on the second cannula 30 are arranged inside the second sealing cap 19, and therefore good sealing of the second cannula 30 by the second sealing cap 19 can be achieved. In order to ensure that the second sealing cap 19 is easy to disassemble even after the second cannula 30 is plugged and submitted for inspection, the outer surface of the second cannula 30 and the inner surface of the second sealing cap 19 are coated with an anti-coagulant coating.
As shown in fig. 6, a schematic structural diagram of a limiting clamping plate in the present invention is provided, fig. 5 shows a schematic structural diagram of the limiting clamping plate in the present invention after being assembled with a syringe, the limiting clamping plate 18 is in a double-layer structure, an arc-shaped notch 39 matched with the syringe 21 of the injection syringe 16 is arranged on the lower layer of the limiting clamping plate 18, a central notch 34 is arranged on the upper layer of the limiting clamping plate 18, and a groove 35 is arranged in the center of the limiting clamping plate 18. The upper end of the needle cylinder 21 of the drawing and injecting syringe 16 is provided with the lug plate 33, the groove 35 on the limiting clamping plate 18 is clamped on the lug plate 33 of the drawing and injecting syringe 16, the rib plate on the handle 22 on the drawing and injecting syringe 16 passes through the central notch 34 on the limiting clamping plate 18, thus the upper layer of the limiting clamping plate 18 realizes the blocking function on the piston 23 on the drawing and injecting syringe 16, and the piston 23 can be prevented from being discharged from the upper end of the needle cylinder 21.
The method for collecting the blood sample by the arteriovenous Guan Caixie device through the venous catheterization comprises the following steps:
first, the first heparin cap 9 on the intravenous catheter 8 on the patient 7 is detached, and the first cannula 27 on the infusion syringe 16 is inserted into the heparin cap joint 10 of the intravenous catheter 8, while the handle on the first valve 29 is kept pointing in the axial direction of the branch 28 to keep the branch 28 in the off state and the first cannula 27 in the on state; then, by pulling out the handle 22 of the syringe 16, the catheter sealing liquid 36 in the intravenous catheter 8 and/or part of the blood in the vein is withdrawn, the catheter sealing liquid 36 is withdrawn first and stored in the sponge tube 24 and the storage cavity 25 of the sponge tube 24, and the part of the blood withdrawn first is mixed with the catheter sealing liquid 36 to form a diluted mixed liquid 37, and the diluted mixed liquid 37 cannot serve as a blood sample due to dilution, but the blood near the catheter 28 is undiluted and can serve as a blood sample. As shown in fig. 7, a state diagram of the drawing-injection syringe of the present invention when used in combination with an intravenous catheter is shown.
Then, the second cannula 30 of the blood drawing syringe 17 is inserted onto the branch tube 28, and then the handle of the first valve 29 is directed to the direction of the needle cylinder 21 of the blood drawing syringe 16 by rotating the handle of the first valve 29, at this time, the front ends of the branch tube 28 and the first cannula 27 are in a conducting state, and the needle cylinder 21 of the blood drawing syringe 16 and the first cannula 27 are in a cutting-off state; the blood sample of the patient 7 is then drawn into the blood drawing syringe 17 by pulling the handle 22 of the blood drawing syringe 17 outward to effect collection of the blood sample of the patient 7. As shown in fig. 8, a state diagram of the blood drawing syringe and the infusion syringe of the present invention when used in combination with an intravenous catheter is shown. Then, the branch pipe 28 is closed by rotating the first valve 29, the blood drawing syringe 17 is pulled out from the branch pipe 28, the second cannula 30 of the blood drawing syringe 17 is plugged by the second sealing cap 19, and then the blood specimen is sent out. As shown in fig. 9, a state diagram of the syringe of the present invention after the completion of blood drawing is shown.
Finally, the handle on the first valve 29 is turned to point to the axial direction of the branch pipe 28 to keep the branch pipe 28 in the off state, while the first cannula 27 is in the on state, and the diluted mixed liquid 37 and the tube sealing liquid 36 stored in the drawing and injecting syringe 16 are refilled into the vein tube 8 by pushing the handle 22 of the drawing and injecting syringe 16 inwards, at this time, the tube sealing operation on the vein tube 8 is realized again by the tube sealing liquid 36 finally entering, and the tube sealing operation is not needed again. After the withdrawal of the syringe 16, the first heparin cap 9 is again connected to the heparin cap adapter 10.
The method for collecting the blood sample by the arterial and venous syringe Guan Caixie device is basically the same as the method for collecting the blood sample by the venous syringe, and as shown in fig. 10, a state diagram is given when the blood drawing syringe and the injection syringe are matched with the arterial syringe for use in the invention, and in the process of collecting the blood sample by the arterial syringe, the first cannula 27 of the injection syringe 16 is connected with the outer barrel 32 on the three-way pipe 14, and the on-off state of the three-way pipe 14 is controlled by the second valve 31.
Claims (5)
1. An improved arteriovenous catheterization hemostix comprises a drawing and injecting syringe (16) and a blood drawing syringe (17), wherein the drawing and injecting syringe and the blood drawing syringe are composed of a needle cylinder (21), a handle (22) and a piston (23), the piston is positioned in an inner cavity of the needle cylinder, and the inner end of the handle is fixed with the piston; the method is characterized in that: the front end of the needle cylinder of the drawing and injecting injector is provided with a first cannula (27) which is used for being connected with a heparin cap joint (10) on a vein catheterization (8) or an outer cylinder tube (32) on a three-way tube (14) on an artery catheterization (11), a branch tube (28) is fixed on the first cannula, and a first valve (29) for controlling the on-off state of the first cannula and the branch tube is arranged on the first cannula; the front end of the syringe of the blood drawing injector is provided with a second cannula (30) connected with the branch pipe, and the second cannula is plugged by a second detachable sealing cap (19);
the drawing and injecting injector is used for drawing out the tube sealing liquid (36) and the dilution mixed liquid (37) in the vein tube (8) or the artery tube (11), the drawing and injecting injector is used for drawing out the blood (38) in the vein or the artery of the patient through the branch pipe (28), and the drawing and injecting injector is used for sequentially re-injecting the drawn dilution mixed liquid and the tube sealing liquid into the vein tube or the artery tube after the blood of the patient is drawn out.
2. The improved arteriovenous catheter hemostix of claim 1, wherein: a sponge barrel (24) for preventing turbulence phenomenon is arranged in a needle cylinder (21) of the drawing and injecting injector (16), the sponge barrel is fixed on a piston (23) in the needle cylinder, a storage cavity (25) for storing tube sealing liquid (36) is formed in the center of the sponge barrel, a round baffle (26) for plugging an opening of the storage cavity is fixed at the outer end of the sponge barrel, and the diameter of the baffle is larger than that of the storage cavity and smaller than that of the needle cylinder.
3. The improved arteriovenous catheter hemostix of claim 2, wherein: including preventing to take out spacing cardboard (18) of the piston (23) in annotating syringe (16) from the drunkenness in cylinder (21), take out the end of the cylinder (21) of annotating syringe and be fixed with two otic placodes (33), offer on the spacing cardboard and be used for the recess (35) of card on the otic placode, offered on the spacing cardboard with the surface matched with arc breach (39) of cylinder, offered central breach (34) that the fin on handle (22) passed on the spacing cardboard.
4. An improved arteriovenous catheter hemostix as claimed in claim 3, characterized in that the infusion syringe (16), the blood syringe (17), the limiting clamp (18) and the second sealing cap (19) are all wrapped in a sterile second sealing bag (20).
5. The improved arteriovenous catheter hemostix of claim 1 or 2, wherein: the external surface of the second cannula (30) of the blood drawing syringe (17) is provided with external threads and is coated with an anticoagulation coating, and the internal surface of the second sealing cap (19) is provided with internal threads and is coated with an anticoagulation coating; the branch pipe (28) is provided with internal threads on the inner surface which cooperate with external threads on the second cannula.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410106230.XA CN117653104A (en) | 2024-01-25 | 2024-01-25 | An improved arteriovenous catheter blood collection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410106230.XA CN117653104A (en) | 2024-01-25 | 2024-01-25 | An improved arteriovenous catheter blood collection device |
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| CN117653104A true CN117653104A (en) | 2024-03-08 |
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| CN202410106230.XA Pending CN117653104A (en) | 2024-01-25 | 2024-01-25 | An improved arteriovenous catheter blood collection device |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217525132U (en) * | 2021-11-02 | 2022-10-04 | 绵阳市中心医院 | Closed blood sampling device for arteriovenous indwelling tube |
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- 2024-01-25 CN CN202410106230.XA patent/CN117653104A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217525132U (en) * | 2021-11-02 | 2022-10-04 | 绵阳市中心医院 | Closed blood sampling device for arteriovenous indwelling tube |
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