Blood sampling device special for central venous catheter

Abstract

The utility model relates to the technical field of venous blood sampling medical instruments, and provides a blood sampling device special for a central venous catheter, a catheter connector, a blood sampling device and an auxiliary blood sampling device, the catheter connector is used for connecting the central venous catheter, the blood sampling device and the auxiliary blood sampling device are connected with the catheter connector, and the blood sampling device is used for sampling blood. The auxiliary blood collector is used for removing collected waste blood and washing the tube. The catheter connector is connected with the central venous catheter, a vein does not need to be found and punctured again for blood collection, the auxiliary blood collector and the blood collector are arranged, blood needing to be discarded can be extracted through the auxiliary blood collector, then the blood collector is used for blood collection of a patient, and the blood collection efficiency is improved. Finally, 20ml NS is used for flushing the tube through the auxiliary blood collector, an injector does not need to be replaced frequently in the blood collection process, the risk of CABSI is reduced, the blood collector is connected with a vacuum collection tube, the risk of needle pricking injury is reduced, and the safety is improved while the blood collection efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of venous blood sampling medical devices, and in particular to a blood sampling device dedicated to a central venous catheter. Background Art

[0002] Central venous catheters (CVCs), including PICCs, CVCs, and infusion ports, are important routes for fluid delivery, medication, or nutritional support. They can be inserted into large blood vessels, such as the superior vena cava. Compared to peripheral veins, these large vessels are more stable and provide more reliable vascular access. They are suitable for long-term infusions, medication infusions, and frequent blood draws. For patients who require frequent blood tests, they reduce the pain and discomfort of multiple peripheral venous punctures.

[0003] Existing venous blood collectors are basically used to collect blood from peripheral veins. When collecting blood through an indwelling central venous catheter, a syringe is usually used to first draw out the amount of blood to be discarded, and then a new syringe is used to draw blood and the blood in the syringe is injected into a test tube for testing. After the collection is completed, 20 ml of NS is needed to flush the tube. The syringe needs to be frequently inserted and removed during the blood collection process, which is not only cumbersome to operate and has low blood collection efficiency, but also very easy to injure patients or medical staff. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a blood sampling device dedicated to central venous catheters, aiming to solve the problems that existing venous blood sampling devices are not suitable for central venous catheters and the existing central venous catheter blood sampling methods are inefficient.

[0005] The technical solution adopted by the present application to solve the technical problem is as follows: A blood sampling device dedicated to a central venous catheter comprises: a catheter connector, the catheter connector being used to connect to a central venous catheter;

[0006] a blood collector connected to the catheter connector and used for collecting blood;

[0007] An auxiliary blood collector is connected to the catheter connector and is used for removing waste blood and flushing the tube.

[0008] Furthermore, the blood collection device includes: a blood collection needle, which is used to connect to a vacuum blood collection tube.

[0009] Furthermore, the auxiliary blood collector includes a syringe connector, which is used to connect a syringe.

[0010] Furthermore, the syringe connector is a non-destructive needle connector.

[0011] The auxiliary blood collector further comprises: a catheter flusher, which is detachably connected to the non-destructive needle connector.

[0012] Furthermore, the central venous catheter dedicated blood sampling device also includes: a sealer, which is used to separate the blood collection needle and the catheter connector when the vacuum blood collection tube is separated from the blood collection needle.

[0013] Furthermore, the blood collection needle is connected to the catheter connector through an infusion tube.

[0014] The sealer includes an infusion tube clamp, which is arranged on the infusion tube and is used to control the on / off state of the infusion tube.

[0015] Furthermore, the sealer further comprises: a jog valve, through which the blood collection needle is connected to the catheter connector;

[0016] A driving unit is used to close the inching valve when the vacuum blood collection tube is separated from the blood collection needle.

[0017] Furthermore, the inching valve includes: a chamber, the catheter connector and the blood collection needle are arranged on the chamber in opposition, and the catheter connector is connected to the chamber;

[0018] a movable portion, one end of which is connected to the lancet, the other end of which passes through the chamber and is slidably disposed within the chamber toward the catheter connector, the movable portion having a valve-opening position and a valve-closing position, the valve-opening position being located between the valve-closing position and the lancet;

[0019] an opening portion, the opening portion being provided on the movable portion and connected to the blood collection needle;

[0020] The piston portion is arranged in the chamber and is used to close the opening when the movable portion is located at the valve closing position.

[0021] Furthermore, the driving part includes a spring connected between the movable part and the catheter connector, and the spring is used to drive the movable part to move to the valve closing position.

[0022] Furthermore, the auxiliary blood collector also includes: a self-sealing device, which is used to separate the syringe connector and the catheter connector when the syringe is separated from the syringe connector, and the self-sealing device has the same structure as the sealer.

[0023] Compared with the existing technology, the utility model is connected to the central venous catheter by providing a catheter connector, and there is no need to re-find and puncture the vein for blood collection. In addition, an auxiliary blood collector and a blood collector are provided. The amount of blood to be discarded can be drawn through the auxiliary blood collector, and then the blood collector is used to collect blood from the patient. Finally, 20 ml of NS is used to flush the tube through the auxiliary blood collector. There is no need to frequently replace the syringe during the blood collection process to reduce the risk of CABSI. The blood collector is connected to the vacuum collection tube to reduce the risk of needlestick injuries. This device improves the blood collection efficiency while also increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of the dedicated blood sampling device for central venous catheters provided in this embodiment;

[0026] Figure 2 This embodiment Figure 1 A partial cross-sectional schematic diagram;

[0027] Figure 3 This embodiment Figure 2 A schematic diagram of the local enlarged structure at point A;

[0028] Figure 4 This embodiment Figure 2 Schematic diagram of the local enlarged structure at B.

[0029] In the figure: 101, catheter connector; 201, blood collection needle; 202, vacuum blood collection tube; 300, auxiliary blood collection device; 301, syringe connector; 302, catheter flusher; 400, sealer; 401, infusion tube clamp; 402, momentary valve; 402a, movable part; 402b, opening part; 402c, piston part; 403, spring; 501, self-sealing device. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other.

[0034] The utility model provides Figures 1 to 4 As shown in the figure, a blood sampling device dedicated to central venous catheter is intended to solve the problems that existing venous blood sampling devices are not suitable for central venous catheters and existing central venous catheter blood sampling methods are inefficient.

[0035] This central venous catheter-specific blood collection device mainly includes: a catheter connector 101, a blood collector and an auxiliary blood collector 300. The catheter connector 101 is used to connect the central venous catheter. The blood collector and the auxiliary blood collector 300 are respectively connected to the catheter connector 101. The blood collector is used for blood collection, and the auxiliary blood collector 300 is used to remove waste blood and flush the tube.

[0036] In actual use, the catheter connector 101 is first connected to a central venous catheter. This allows the catheter connector 101 to be connected to a vein, eliminating the need to find and puncture a new vein for blood collection. It should be noted that the catheter connector 101 is existing technology and is already in use in hospitals. The amount of blood to be discarded is then drawn using the auxiliary blood collector 300, and the patient's blood is then collected using the blood collector. Finally, the auxiliary blood collector 300 is flushed with 20 ml of NS and sealed.

[0037] Existing venous blood collectors are basically used to collect blood from peripheral veins. When collecting blood through an indwelling central venous catheter, a syringe is usually used to first draw out the amount of blood to be discarded, and then a new syringe is used to draw blood and the blood in the syringe is injected into a test tube for testing. After the collection is completed, 20 ml of NS is needed to flush the tube. The syringe needs to be frequently inserted and removed during the blood collection process, which is not only cumbersome to operate and has low blood collection efficiency, but also very easy to injure patients or medical staff.

[0038] The present invention is connected to the central venous catheter by providing a catheter connector 101, and there is no need to re-search and puncture the vein for blood collection. In addition, an auxiliary blood collector 300 and a blood collector are provided. The amount of blood to be discarded can be drawn through the auxiliary blood collector 300, and then the blood collector is used to collect blood from the patient. Finally, 20 ml of NS is used to flush the tube through the auxiliary blood collector 300. During the blood collection process, there is no need to frequently replace the syringe to reduce the risk of CABSI. The blood collector is connected to the vacuum collection tube to reduce the risk of needlestick injuries. This device improves the blood collection efficiency while also increasing safety.

[0039] In some embodiments, as Figures 1 to 3 As shown in the figure, the blood collection device includes: a blood collection needle 201, which is used to connect to a vacuum blood collection tube 202. The vacuum blood collection tube 202 is a disposable, negative pressure vacuum glass tube that can achieve quantitative blood collection and needs to be used in conjunction with the venous blood collection needle 201. The structure of the blood collection needle 201 in this application can be the same as the structure of the end of the venous blood collection needle 201 that is connected to the vacuum blood collection tube 202. When the blood collection needle 201 is inserted into the vacuum blood collection tube 202, due to the negative pressure environment of the vacuum blood collection tube 202, the vacuum blood collection tube 202 can absorb the blood in the patient's veins through the central venous catheter. Compared with using a syringe for blood collection, this process is easier.

[0040] In some embodiments, as Figure 1 、 Figure 2 、 Figure 4 As shown in FIG, the auxiliary blood collection device 300 includes a syringe connector 301, which is used to connect a syringe. Preferably, the syringe connector 301 is a non-destructive needle connector.

[0041] The auxiliary blood collection device 300 also includes a catheter flusher 302, which is detachably connected to the atraumatic needle connector. The catheter flusher 302 can be a prefilled catheter flusher 302 or a non-prefilled catheter flusher 302. Alternatively, a non-prefilled catheter flusher 302 can be connected to the atraumatic needle connector to draw a volume of blood to be discarded, and then a prefilled catheter flusher 302 can be used to flush the catheter after blood collection is complete. It should be noted that both the non-prefilled catheter flusher 302 and the prefilled catheter flusher 302 are conventional, and the prefilled catheter flusher 302 contains a flushing solution.

[0042] In some embodiments, as Figures 1 to 3 As shown in , the central venous catheter-specific blood sampling device further includes a sealer 400, which is used to separate the blood collection needle 201 from the catheter connector 101 when the vacuum blood collection tube 202 is separated from the blood collection needle 201. When the vacuum blood collection tube 202 is separated from the blood collection needle 201, since the auxiliary blood collection device 300 is connected to the blood collection needle 201, if the auxiliary blood collection device 300 is used to flush the central venous catheter at this time, the solution in the auxiliary blood collection device 300 will flow out of the blood collection needle 201, resulting in a failure in flushing. Therefore, when the vacuum blood collection tube 202 is separated from the blood collection needle 201, the blood collection needle 201 needs to be separated from the catheter connector 101.

[0043] In some embodiments, as Figures 1 to 3 As shown in FIG, the blood collection needle 201 is connected to the catheter connector 101 through the infusion tube.

[0044] The sealer 400 includes an infusion tube clamp 401, which is provided on the infusion tube and is used to control the opening and closing of the infusion tube. The infusion tube clamp 401 is a prior art and can separate the infusion tube, thereby separating the blood collection needle 201 from the catheter connector 101.

[0045] In some embodiments, as Figures 1 to 3 As shown in , the sealer 400 further includes: a jog valve 402, through which the blood collection needle 201 is connected to the catheter connector 101;

[0046] The driving part is used to close the inching valve 402 when the vacuum blood collection tube 202 is separated from the blood collection needle 201. The driving part can be electric or manual, preferably manual, which can reduce the production cost of disposable products.

[0047] In some embodiments, as Figures 1 to 3 As shown in , the inching valve 402 includes: a chamber, a catheter connector 101 and a blood collection needle 201 are oppositely arranged on the chamber, the catheter connector 101 is connected to the chamber, preferably, the chamber is cylindrical, and the catheter connector 101 and the blood collection needle 201 are both collinear with the central axis of the chamber;

[0048] The movable portion 402a has one end connected to the lancet 201, and the other end of the movable portion 402a extends through the chamber and is slidably disposed within the chamber toward the catheter connector 101. One end of the movable portion 402a is located within the chamber, and the other end is located outside the chamber and connected to the lancet 201. When the movable portion 402a slides within the chamber, the chamber is isolated from the outside world except for being connected to the catheter connector 101 and the lancet 201. The movable portion 402a has an open valve position and a closed valve position, and the open valve position is located between the closed valve position and the lancet 201.

[0049] The opening 402b is provided on the movable portion 402a, and the opening is connected to the blood collection needle 201;

[0050] The piston portion 402c is disposed in the chamber and is used to close the opening portion 402b when the movable portion 402a is located at the valve closing position.

[0051] When the medical staff uses the blood collection needle 201 to insert the vacuum blood collection tube 202, the blood collection needle 201 is moved toward the catheter connector 101 due to the resistance, thereby driving the movable portion 402a to move toward the direction close to the catheter connector 101. At this time, the movable portion 402a will move to the valve-opening position, and the opening portion 402b is connected to the chamber. At this time, the blood collection needle 201-movable portion 402a-opening portion 402b-chamber-catheter connector 101 is connected in sequence, so that the blood collection needle 201 is connected to the catheter connector 101. In other words, when the medical staff uses the blood collection needle 201 to insert the vacuum blood collection tube 202, the blood collection needle 201 and the catheter connector 101 are automatically connected for blood collection;

[0052] When the medical staff presses the vacuum blood collection tube 202 and pulls it out from the blood collection needle 201, the blood collection needle 201 will be subjected to friction resistance and will move along with the vacuum blood collection tube 202 in the direction away from the catheter connector 101, thereby driving the movable part 402a to move in the direction away from the catheter connector 101. At this time, the movable part 402a will move to the closed valve position, and the opening part 402b will be isolated from the chamber. At this time, the opening part 402b is not conductive with the chamber (blood collection needle 201-movable part 402a-opening part 402b×chamber-catheter connector 101), so that the blood collection needle 201 is isolated from the catheter connector 101. That is to say, when the medical staff presses the vacuum blood collection tube 202 and pulls it out from the blood collection needle 201, the blood collection needle 201 and the catheter connector 101 can be automatically isolated, thereby facilitating the subsequent flushing work.

[0053] In some embodiments, as Figures 1 to 3As shown in FIG, the driving portion includes a spring 403 connected between the movable portion 402a and the catheter connector 101. The spring 403 is used to drive the movable portion 402a to the closed valve position. In summary, although the movable portion 402a can be driven to move when the vacuum blood collection tube 202 is manually inserted or removed, vibration may also cause the movable portion 402a to move. To prevent the movable portion 402a from moving to the open valve position due to vibration, the spring 403 is provided. The spring 403 can drive the movable portion 402a to the closed valve position, thereby improving the fault tolerance rate and reducing the probability of accidents.

[0054] In some embodiments, as Figure 1 、 Figure 2 、 Figure 4 As shown in , the auxiliary blood collection device 300 also includes a self-sealing device 501, which is used to separate the syringe connector 301 from the catheter connector 101 when the syringe is separated from the syringe connector 301. The self-sealing device 501 has the same structure as the sealer 400. After the syringe draws 5 ml of blood, it needs to be removed from the syringe connector 301. At this time, the self-sealing device 501 automatically separates the syringe connector 301 from the catheter connector 101, preventing blood from spurting out of the syringe connector 301.

[0055] In summary, a blood sampling device dedicated to a central venous catheter is provided, which includes a catheter connector, a blood collector, and an auxiliary blood collector. The catheter connector is used to connect the central venous catheter, the blood collector and the auxiliary blood collector are respectively connected to the catheter connector, the blood collector is used to collect blood, and the auxiliary blood collector is used to remove waste blood and flush the tube. The utility model is connected to the central venous catheter by providing a catheter connector, and there is no need to re-find and puncture the vein for blood collection. In addition, an auxiliary blood collector and a blood collector are provided. The amount of blood that needs to be discarded can be extracted by the auxiliary blood collector, and then the blood collector is used to collect blood from the patient. Finally, the auxiliary blood collector is used to flush the tube with 20 ml of NS. There is no need to frequently replace the syringe during the blood collection process to reduce the risk of CABSI. The blood collector is connected to a vacuum collection tube to reduce the risk of needlestick injuries. This device improves blood collection efficiency while also increasing safety.

[0056] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A blood sampling device for a central venous catheter, characterized in that: include: A catheter connector, the catheter connector is used to connect a central venous catheter; A blood collector, the blood collector is connected to the catheter connector and is used for collecting blood; An auxiliary blood collector, which is connected to the catheter connector and is used to remove waste blood and flush the tube; The blood collection device comprises: a blood collection needle, the blood collection needle is used to connect to a vacuum blood collection tube; The auxiliary blood collector comprises: a syringe connector, the syringe connector is used to connect a syringe; The central venous catheter dedicated blood collection device further comprises: a sealer, the sealer being used to separate the blood collection needle from the catheter connector when the vacuum blood collection tube is separated from the blood collection needle; The sealer further comprises: a jog valve, through which the blood collection needle is connected to the catheter connector; A driving unit, the driving unit is used to close the inching valve when the vacuum blood collection tube is separated from the blood collection needle; The inching valve comprises: a chamber, the catheter connector and the blood collection needle are arranged on the chamber in opposition, and the catheter connector is connected to the chamber; A movable part, one end of which is connected to the blood collection needle, the other end of which penetrates the chamber and is slidably disposed in the chamber toward the catheter connector, the movable part having an open valve position and a closed valve position, the open valve position being located between the closed valve position and the blood collection needle; An opening portion, the opening portion being arranged on the movable portion, and the opening being connected to the blood collection needle; The piston part is arranged in the chamber and is used to close the opening when the movable part is located at the valve closing position.

2. The central venous catheter dedicated blood sampling device according to claim 1, characterized in that: The syringe connector is a non-destructive needle connector. The auxiliary blood collector also includes a catheter flusher, which is detachably connected to the non-destructive needle connector.

3. The central venous catheter dedicated blood sampling device according to claim 1, characterized in that: The blood collection needle is connected to the catheter connector through an infusion tube. The sealer comprises: an infusion tube clamp, which is arranged on the infusion tube and is used to control the on-off of the infusion tube.

4. The central venous catheter dedicated blood sampling device according to claim 1, characterized in that: The driving part comprises a spring connected between the movable part and the catheter connector, and the spring is used for driving the movable part to move to the valve closing position.

5. The central venous catheter dedicated blood sampling device according to any one of claims 1 to 4, characterized in that: The auxiliary blood collector further comprises: a self-sealing device, which is used to separate the syringe connector and the catheter connector when the syringe is separated from the syringe connector, and the structure of the self-sealing device is the same as that of the sealer.

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