CN221635805U - Deep vein blood sampling device - Google Patents

Abstract

The utility model discloses a deep vein blood sampling device, which comprises a three-way valve, wherein a first connector of the three-way valve is provided with a threaded connector which is used for being detachably connected with a deep vein catheterization, a second connector of the three-way valve is connected with a negative pressure drainage device, the negative pressure drainage device is used for sucking out discarded blood after negative pressure is formed, a third connector of the three-way valve is detachably connected with a blood taking needle assembly, and the blood taking needle assembly is connected with a vacuum blood taking tube in a use state and is used for collecting blood to be tested. The utility model can suck out waste blood, reduce the risks of blood splashing and infection during blood sampling, reduce the steps of medical staff during blood sampling, improve the working efficiency of the medical staff and reduce the pain of patients.

Description

A deep vein blood sampling device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a deep vein blood sampling device.

Background Art

At present, patients in the Department of Oncology and patients who need long-term intravenous nutrition therapy will choose deep vein catheterization. During the treatment, blood will be drawn regularly to check various indicators. However, there is no special blood collection needle for deep vein catheterization in clinical practice. When medical staff draw blood from patients with deep vein catheterization, the steps of drawing blood from the catheterization site are cumbersome. The traditional blood drawing method is that medical staff use a disposable syringe to draw 10ml of blood from the deep vein catheterization site and discard it, because this 10ml of blood may contain previously injected drugs or heparin. If this 10ml of blood is used for testing, it may affect the results of the blood test. After discarding the 10ml of blood drawn at the beginning, a new disposable syringe is used to draw 10ml of blood to be tested, and this 10ml of blood to be tested is injected into the blood collection tube in batches, and then blood testing is performed. This traditional method has the risk of blood splashing and infection. Moreover, if the blood to be tested is not injected into the blood collection tube in time, it is easy to coagulate due to a long time. The coagulated blood cannot be tested. At this time, blood drawing needs to be performed again, which increases the workload of medical staff and also increases the pain of patients.

How to solve the above problems has become a technical problem that needs to be solved urgently.

Utility Model Content

The purpose of the utility model is to provide a deep vein blood sampling device that can suck out discarded blood, reduce the risk of blood splashing and infection during blood sampling, reduce the steps for medical staff when drawing blood, improve the work efficiency of medical staff, and reduce the pain of patients.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

The utility model provides a deep vein blood sampling device, including a three-way valve, a first interface of the three-way valve is provided with a threaded interface for detachable connection with a deep vein catheter, a second interface of the three-way valve is connected with a negative pressure drainage device, the negative pressure drainage device is used to suck out discarded blood after forming negative pressure, the third interface of the three-way valve is detachably connected to a blood collection needle assembly, and the blood collection needle assembly is connected to a vacuum blood collection tube when in use, and the vacuum blood collection tube is used to collect blood to be tested.

Furthermore, the negative pressure drainage device includes a negative pressure drainage ball, the top of the negative pressure drainage ball is connected to the second interface through a drainage tube, the bottom of the negative pressure drainage ball is connected to a waste liquid bag, a one-way valve is provided inside the negative pressure drainage ball near the second interface, and a drainage ball switch is provided between the waste liquid bag and the negative pressure drainage ball.

Furthermore, the outer wall of the waste liquid bag is provided with scale lines, and the surface of the negative pressure drainage ball is provided with scales showing the capacity.

Furthermore, the blood collection needle assembly includes a blood collection needle and a protective sleeve sleeved on the outside of the blood collection needle. The blood collection needle is detachably connected to the third interface. When in use, the vacuum blood collection tube is inserted into the blood collection needle for blood collection.

Furthermore, the negative pressure drainage ball is made of silicone, and the scale range set on the surface of the negative pressure drainage ball is 1-10ml.

Due to the adoption of the above structure, the utility model has the following beneficial effects:

The utility model discloses a deep vein blood sampling device, which connects a threaded interface of a three-way valve with a deep vein catheter. Due to the provision of a threaded interface, the threaded interface is firmly connected to the deep vein catheter, so that blood splashing and infection during blood sampling can be reduced. The second interface of the three-way valve is connected to a negative pressure drainage device, and the third interface of the three-way valve is connected to a blood sampling needle assembly. By adjusting the three-way valve, the passage at the third interface is first closed, the passage between the first interface and the second interface is opened, and then the negative pressure drainage device is opened, and a part of blood (the part of blood is discarded blood) is drained from the deep vein catheter into the negative pressure drainage device by using negative pressure, and then the passage between the first interface and the second interface is closed by adjusting the three-way valve, and the passage between the first interface and the third interface is opened, and a vacuum blood sampling tube is connected to the blood sampling needle assembly, and blood flows into the vacuum blood sampling tube and is then used for detection, thereby reducing the need to suck out the blood to be tested and then inject it into the blood sampling tube in the traditional practice, thereby reducing the chance of blood coagulation and the risk of blood contamination caused by repeated injection into the blood sampling tube. The utility model can suck out discarded blood, reduce the risk of blood splashing and infection during blood collection, reduce the steps of medical staff in blood collection, improve the working efficiency of medical staff, and reduce the pain of patients.

The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of the overall structure of the utility model.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figure 1. The utility model provides a deep vein blood sampling device, including a three-way valve 1. A threaded interface 2 for detachable connection with a deep vein catheter is provided on the first interface 11 of the three-way valve 1. A negative pressure drainage device 3 is connected to the second interface 12 of the three-way valve 1. The negative pressure drainage device 3 is used to suck out discarded blood after forming a negative pressure. The third interface 13 of the three-way valve 1 is detachably connected to a blood collection needle assembly 4. The blood collection needle assembly 4 is connected to a vacuum blood collection tube when in use. The vacuum blood collection tube is used to collect blood to be tested. The existence of the threaded interface 2 enables the three-way valve 1 to be firmly connected to the deep vein catheter, reducing the situation of blood splashing during blood collection.

Preferably, the negative pressure drainage device 3 includes a negative pressure drainage ball 31, the upper part of the negative pressure drainage ball 31 is connected to the second interface 12 through a drainage tube, the lower part of the negative pressure drainage ball 31 is connected to a waste liquid bag 32, a one-way valve 33 is provided inside the negative pressure drainage ball 31 near the second interface 12, and a drainage ball switch 34 is provided between the waste liquid bag 32 and the negative pressure drainage ball 31. More preferably, an opening is provided on the upper part of the waste liquid bag 32.

Preferably, the outer wall of the waste liquid bag 32 is provided with scale lines, and the surface of the negative pressure drainage ball 31 is provided with scales showing the capacity.

Preferably, the blood collection needle assembly 4 includes a blood collection needle 41 and a protective sleeve 42 sleeved on the outside of the blood collection needle, the blood collection needle 41 is detachably connected to the third interface 13, and the vacuum blood collection tube is inserted into the blood collection needle 41 for blood collection when in use. The blood collection needle 41 and the protective sleeve 42 are prior art and are not described in detail.

Preferably, the negative pressure drainage ball 31 is made of silica gel, and the scale range set on the surface of the negative pressure drainage ball 31 is 1-10 ml. The negative pressure drainage ball 31 can only store 10 ml of blood at most.

When the utility model is used specifically, the threaded interface 2 of the three-way valve 1 is connected to the deep vein catheter, the second interface 12 of the three-way valve 1 is connected to the negative pressure drainage ball 31 through the drainage tube, and the third interface 13 of the three-way valve 1 is connected to the blood collection needle 41. By adjusting the adjustment switch of the three-way valve 1, the passage at the third interface 13 is first closed, and the passage between the first interface 11 and the second interface 12 is opened, and then the drainage ball switch 34 is opened, and the negative pressure drainage ball 31 is pressed by hand to discharge the air inside it. Since a one-way valve 33 is provided in the negative pressure drainage ball 31, the air inside it will not enter the passage between the first interface 11 and the second interface 12 when the negative pressure drainage ball 31 is pressed, the drainage ball switch 34 is closed, and the hand is released. The negative pressure drainage ball 31 is deformed and the interior is negatively pressurized, thereby opening the one-way valve 33, and using the negative pressure to drain blood from the deep vein catheter. A portion of the blood enters the negative pressure drainage ball 31 (this portion of the blood is discarded blood). After the pressure of the negative pressure drainage ball 31 is balanced, the drainage ball switch 34 is turned on to discharge the drawn blood into the waste liquid bag 32. By observing whether the scale line on the outer wall of the waste liquid bag 32 reaches the discarded 10ml standard, if it is less than 10ml, the operation is repeated until the discarded blood in the waste liquid bag 32 is 10ml. When it is about to reach the 10ml discard standard, the drainage ball switch 34 is turned on to reduce the internal pressure of the negative pressure drainage ball 31, reduce the blood flowing into the negative pressure drainage ball 31, and then adjust the three-way valve 1 to close the passage between the first interface 11 and the second interface 12, open the passage between the first interface 11 and the third interface 13, connect the vacuum blood collection tube to the blood collection needle 41, and the blood flows into the vacuum blood collection tube for detection. The utility model can suck out discarded blood, reduce the risk of blood splashing and infection during blood collection, reduce the steps of medical staff in blood collection, improve the working efficiency of medical staff, and reduce the pain of patients.

The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific implementation methods, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the utility model without departing from the scope of the technical solution of the utility model, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims (4)

1. A deep vein blood sampling device, comprising a three-way valve (1), characterized in that: a threaded interface (2) for detachably connecting to a deep vein catheter is provided on a first interface (11) of the three-way valve (1), a negative pressure drainage device (3) is connected to a second interface (12) of the three-way valve (1), the negative pressure drainage device (3) is used to suck out discarded blood after forming a negative pressure, and a third interface (13) of the three-way valve (1) is detachably connected to a blood collection needle assembly (4), and the blood collection needle assembly (4) is connected to the blood collection needle assembly (4) when in use. A vacuum blood collection tube is connected, and the vacuum blood collection tube is used to collect blood to be tested; the negative pressure drainage device (3) comprises a negative pressure drainage ball (31), the upper part of the negative pressure drainage ball (31) is connected to the second interface (12) through a drainage tube, the lower part of the negative pressure drainage ball (31) is connected to a waste liquid bag (32), a one-way valve (33) is provided inside the negative pressure drainage ball (31) near the second interface (12), and a drainage ball switch (34) is provided between the waste liquid bag (32) and the negative pressure drainage ball (31). 2. A deep vein blood sampling device as described in claim 1, characterized in that: the outer wall of the waste liquid bag (32) is provided with scale lines, and the surface of the negative pressure drainage ball (31) is provided with a scale showing the capacity. 3. A deep vein blood sampling device as described in claim 1, characterized in that: the blood collection needle assembly (4) includes a blood collection needle (41) and a protective sleeve (42) sleeved on the outside of the blood collection needle, the blood collection needle (41) is detachably connected to the third interface (13), and the vacuum blood collection tube is inserted into the blood collection needle (41) for blood collection when in use. 4. A deep vein blood sampling device as described in claim 2, characterized in that: the negative pressure drainage ball (31) is made of silica gel, and the scale range set on the surface of the negative pressure drainage ball (31) is 1-10ml.