Auxiliary device for reducing blood loss during blood drawing

Abstract

The utility model discloses an auxiliary device for reducing blood loss during blood drawing, which comprises a first tee joint, a second tee joint and a fixed pipeline, the first tee joint is communicated with the second tee joint through the fixed pipeline, and the first tee joint and the second tee joint are respectively provided with a valve for controlling the circulation of each pipeline in the tee joint. Knobs for connection are arranged on the sides, deviating from each other, of the first tee joint and the second tee joint; an injector is arranged on a pipeline on one side of the first tee joint in a communicating mode, and a heparin cap for blood drawing is arranged on a pipeline on one side of the second tee joint. According to the auxiliary device for blood drawing, a novel auxiliary device structure for blood drawing is arranged, and the auxiliary device is detachable, replaceable, capable of being conveniently connected in different pipeline systems and repeatedly used in one pipeline, so that waste during blood drawing can be effectively reduced, a possible infection source is reduced, patient blood is prevented from being discarded, and an injector is saved; and pollution garbage with blood syringes is reduced, and the device has the significance of protecting patients, saving expenditure and protecting the environment.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for reducing blood loss during blood drawing, belonging to the technical field of medical equipment. Background Art

[0002] Multiple studies have repeatedly demonstrated that anemia increases the use of allogeneic blood products and further increases complication rates, prolonged hospital stays, and increased mortality.

[0003] Blood drawing is the main cause of iatrogenic blood loss, and reducing blood loss during blood drawing is an urgent problem to be solved in the treatment of critically ill patients. Because of the severity of their condition and rapid changes in their condition, critically ill patients need to have blood drawn for blood tests every day, and some patients even need blood drawn for tests multiple times a day. In order to reduce the pain of patients, skin and tissue damage, and the burden of medical care caused by repeated skin punctures and blood draws, critically ill patients currently have arteriovenous indwelling needles placed as pathways for fluid replacement, pressure measurement, and blood draws; in addition, for patients undergoing extracorporeal membrane oxygenation (ECMO) and hemodialysis, there will be channels for blood drawing and testing before and after the membrane of the ECMO pipeline and on the hemodialysis machine pipeline. Without exception, these blood drawing pathways need to be pre-filled with saline and retained in the pipeline to prevent the blood in the pipeline from coagulating, so as to avoid thrombosis or pipeline blockage and inability to continue to use. When drawing blood, you need to first use the first syringe to draw out the saline in the line, and at the same time draw back some blood to ensure that the blood is not diluted when the second syringe is used to draw blood for testing. After removing the first syringe from the blood collection channel, discard it, and then replace it with the second syringe for blood collection for testing. Because reconnecting the diluted blood in the first syringe back to the line for reinfusion will increase the risk of bloodstream infection.

[0004] At present, in the intensive care unit, the technical improvements for blood conservation include the use of smaller blood draw tubes and the use of veno-arterial blood management and protection devices (VAMP). The veno-arterial blood management and protection device is a complete pipeline that cannot be disassembled, is expensive, and cannot be connected to the ECMO or venous pipeline, so there is room for improvement. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing device for reducing blood waste during blood drawing is a complete pipeline, which cannot be disassembled, is expensive, and cannot be connected to the ECMO or venous pipeline.

[0006] In order to solve the above technical problems, the utility model provides an auxiliary device for reducing blood loss during blood drawing. By designing a new blood drawing auxiliary device, the problem that the current device is a complete pipeline, cannot be disassembled, is expensive, and cannot be connected to the ECMO or venous pipeline is solved.

[0007] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0008] An auxiliary device for reducing blood loss during blood drawing, comprising a first tee, a second tee and a fixed pipeline, wherein the first tee is connected to the second tee through the fixed pipeline, the first tee and the second tee are both provided with valves for controlling the flow of each pipeline in the tee, and the first tee and the second tee are both provided with connection knobs on the sides facing away from each other;

[0009] A syringe is connected to a pipe on one side of the first three-way connection, and a heparin cap for drawing blood is arranged on a pipe on one side of the second three-way connection.

[0010] Furthermore, the syringe is connected to the first tee through a passage tube, and the passage tube is relatively fixed to the first tee.

[0011] Furthermore, the syringe includes a syringe barrel and a push-pull rod slidably disposed in the syringe barrel, a syringe handle is disposed on a side of the syringe barrel away from the first tee, and a protective sleeve is disposed between the syringe handle and the push-pull rod.

[0012] Furthermore, scale lines are arranged on the outer wall of the injection barrel.

[0013] Furthermore, the length of the fixed pipeline is between 5 and 10 cm.

[0014] The utility model provides an auxiliary device for reducing blood loss during blood drawing, which has the following advantages:

[0015] The utility model can be disassembled, replaced, and conveniently connected in different pipeline systems and reused in one pipeline, which can effectively reduce waste when drawing blood, reduce a possible source of infection, avoid discarding patient blood, save the use of syringes, and reduce the generation of contaminated garbage containing blood syringes, thereby protecting patients, saving money and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of an auxiliary device for reducing blood loss during blood drawing according to an embodiment of the present application;

[0017] In the figure:

[0018] 1-First tee; 2-Second tee; 3-Fixed pipeline; 4-Knob; 5-Access pipe;

[0019] 6-syringe; 61-syringe barrel; 62-push-pull rod; 7-syringe handle; 8-protective cover; 9-scale line; 10-heparin cap; 11-valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present utility model.

[0021] Reference Figure 1 An auxiliary device for reducing blood loss during blood drawing includes a first tee 1, a second tee 2 and a fixed pipeline 3. The side walls of the first tee 1 and the second tee 2 are both equipped with valves 11 for controlling the flow of each pipeline in the tee. In this embodiment, the installation of the valve 11 and the method for controlling the on-off of the pipeline are prior arts and will not be described in detail. The first tee 1 and the second tee 2 are connected through the fixed pipeline 3.

[0022] In a further embodiment, the fixed pipeline 3 is relatively fixed to the first tee 1 and the second tee 2, and is not movable or detachable. The fixing method is preferably welding, and the fixed pipeline 3 is preferably a transparent plastic pipeline. While ensuring the connection stability between the first tee 1 and the second tee 2, it is convenient for medical staff to observe the blood circulation in the first tee 1 and the second tee 2 through the fixed pipeline 3.

[0023] In a further embodiment, the length of the fixed pipeline 3 is between 5 and 10 cm. Medical staff can select fixed pipelines 3 of different models and lengths according to usage requirements, thereby improving the practicality of the auxiliary device. At the same time, the fixed pipeline 3 within this length range will not cause the possibility of excessive blood extraction and waste.

[0024] Reference Figure 1 The first tee 1 and the second tee 2 are both provided with knobs 4 for connecting other pipelines at the pipeline connection ports which are opposite to each other, such as realizing the connection with the anticoagulant saline side.

[0025] Reference Figure 1 A passage tube 5 is welded and fixed on the pipeline on one side of the first tee 1 that is different from the knob 4 and the fixed pipeline 3. A syringe 6 is connected to the side of the passage tube 5 that is away from the first tee 1. The passage tube 5 fixedly connected to the first tee 1 cannot move or unscrew, thereby ensuring safety during operation and preventing contamination.

[0026] In a further embodiment, the syringe 6 includes a syringe barrel 61 and a push-pull rod 62, the syringe barrel 61 is connected to the first tee 1 through the passage tube 5, the push-pull rod 62 is slidably installed in the syringe barrel 61 in a direction close to or away from the first tee 1, and the end of the push-pull rod 62 away from the first tee 1 always extends out of the syringe barrel 61, and the end of the push-pull rod 62 extending into the syringe barrel 61 is usually provided with a piston, and a syringe handle 7 is integrally formed on the side of the syringe barrel 61 away from the first tee 1, and a protective cover 8 is provided between the syringe handle 7 and the push-pull rod 62, and the protective cover 8 is a transparent protective cover 8 with a certain degree of elasticity and antibacterial properties, which can be a protective cover 8 made of polyvinyl chloride (PVC) or a thermoplastic polyurethane elastomer rubber (Thermoplastic polyurethanes, TPU for short in English) protective cover 8. In this embodiment, the protective cover 8 is preferably made of TPU material and is fixedly sealed between the syringe handle 7 and the push-pull rod 62 to ensure the sterility of the inside of the syringe 6 and at the same time ensure that there is no restriction when pulling and pushing the syringe 6.

[0027] In a further embodiment, scale lines 9 are provided on the outer wall of the syringe barrel 61 of the syringe 6. The setting of the scale lines 9 can facilitate medical personnel to better control the amount of blood sucked and the amount of anticoagulant reagent pushed, thereby better reducing blood waste.

[0028] Reference Figure 1 A heparin cap 10 is installed on the pipeline on the second three-way pipe 2 which is different from the knob 4 and the fixed pipeline 3. The heparin cap 10 can be used to connect a blood collection needle or a syringe 6 to achieve blood drawing.

[0029] The method of using the auxiliary device for reducing blood loss during blood drawing of the utility model is as follows:

[0030] For the sake of convenience of explanation, the three connecting ports of the first tee 1 are defined as A1, A2, and A3, respectively, A1 is used to install the knob 4, A2 is used to connect with the second tee 2, and A3 is used to connect with the syringe 6; the three connecting ports of the second tee 2 are defined as B1, B2, and B3, respectively, B1 is used to install the knob 4, B2 is used to connect with the first tee 1, and B3 is used to connect with the heparin cap 10.

[0031] When in use, the A1 end is connected to the anticoagulant saline side, and the B1 end is connected to the catheter near the skin puncture end. When drawing blood, turn the three-way knob 4 to the B1, B2, and B3 positions. Then turn another three-way knob 4 to the A2 and A3 positions, and ensure that the A1 direction is blocked, and then pull the push-pull rod 62 to allow the piston to drive the liquid in the lower passage into the syringe 6, and at the same time drive the blood in the blood vessel to enter. Then, turn the knob 4 back to the position shown in the figure. Then turn the lower knob 4 to the position shown in the figure, unscrew the heparin cap 10, connect the blood collection needle or syringe 6, and then turn the knob 4 to B1, B3 is unobstructed, and the B2 direction is blocked, and blood is collected. After the blood collection is completed, close the B3 direction passage to make B1 and B2 unobstructed, and remove the blood collection tube. The upper knob 4, A2 and A3 directions are unobstructed, and A1 is blocked, and the diluted blood in the syringe 6 is pushed back into the pipeline. Then make A2, A3, A1, and B2, B1 unobstructed, and then open the valve 11 of the upper passage to flush the entire pipeline. The syringe 6 can also be pushed and pulled repeatedly to receive the flushing liquid (usually saline) from the top. In this way, the syringe 6 and the entire pipeline can be flushed clean. Finally, the residual blood in the short tube of B3 can be unscrewed by unscrewing the heparin cap 10 and flushed out while keeping B2, B3, A1, A2 open. In this way, only one blood collection is required to connect the syringe 6, and the blood is only used for blood testing, and the diluted blood is not discarded.

[0032] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. An auxiliary device for reducing blood loss during blood drawing, characterized in that: The invention comprises a first tee (1), a second tee (2) and a fixed pipeline (3), wherein the first tee (1) and the second tee (2) are connected via the fixed pipeline (3), the first tee (1) and the second tee (2) are both provided with valves (11) for controlling the flow of each pipeline in the tee, and the first tee (1) and the second tee (2) are both provided with connection knobs (4) on the sides facing away from each other; A syringe (6) is connected to a pipeline on one side of the first tee (1), and a heparin cap (10) for drawing blood is provided on a pipeline on one side of the second tee (2).

2. An auxiliary device for reducing blood loss during blood drawing according to claim 1, characterized in that: The syringe (6) is connected to the first tee (1) via a passage tube (5), and the passage tube (5) is relatively fixed to the first tee (1).

3. An auxiliary device for reducing blood loss during blood drawing according to claim 1 or 2, characterized in that: The syringe (6) comprises a syringe barrel (61) and a push-pull rod (62) slidably arranged in the syringe barrel (61); a syringe handle (7) is arranged on the side of the syringe barrel (61) facing away from the first tee (1); and a protective sleeve (8) is arranged between the syringe handle (7) and the push-pull rod (62).

4. An auxiliary device for reducing blood loss during blood drawing as claimed in claim 3, characterized in that: The outer wall of the injection cylinder (61) is provided with scale lines (9).

5. An auxiliary device for reducing blood loss during blood drawing according to claim 1, characterized in that: The length of the fixed pipeline (3) is between 5 and 10 cm.

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