Arterial duct blood drawing device

Abstract

The utility model discloses an arterial duct blood drawing device which comprises a catheter provided with an infusion pressurizer, a dropper, a flow controller and an elastic perfusion controller in sequence from the head end, and the elastic perfusion controller is used for controlling a flushing pipe. The connecting tube is detachably connected with the catheter and is sequentially provided with a clamping and closing device and an anti-reflux rubber cap, a rubber cap opening is formed in the center of the anti-reflux rubber cap, the head end of the connecting tube can be clamped and closed through the clamping and closing device, then an injector is used for puncturing the rubber cap opening of the anti-reflux rubber cap for blood drawing, an open port is not needed, the sealing performance is better, and the blood drawing effect is better. Only one pipeline is arranged, pipe cavities are few, and pipe washing is facilitated; the arterial puncture guide needle is detachably connected with the tail end of the connecting tube and used for puncturing the artery, the arterial puncture guide needle is provided with a protective shell capable of automatically wrapping the guide needle, the protective shell can automatically wrap the guide needle when the arterial puncture guide needle is pulled out after the arterial catheter is used, and puncture injury is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an arterial catheter blood drawing device. Background Art

[0002] With the development of medical technology, intravascular catheterization has become an important measure for the treatment of critically ill patients. Intravascular catheterization is an indispensable clinical treatment method for ICU patients, including peripheral intravenous catheters, intraarterial catheters and central venous catheters. These intravascular catheters provide different functions in clinical practice, such as infusion, blood transfusion, blood drawing, and hemodynamic monitoring. However, intravascular catheterization can also cause some complications, such as vascular damage, thrombosis and infection. Among them, the problem of central venous catheter and arterial catheter-related bloodstream infection is the most serious. According to the "Catheter-Related Bloodstream Infection and Central Venous Catheter Bundle Intervention Strategy", ICU catheter-related bloodstream infection can affect the patient's treatment effect, including increased hospitalization time, increased mortality and increased medical costs; therefore, it is very important to do a good job in preventing catheter-related bloodstream infection.

[0003] See attached Figure 1 The existing arterial catheter structure, currently in clinical arterial catheter and invasive blood pressure monitoring system, is to draw blood by unscrewing the joint at the three-way connection port of the arterial catheter, opening the protective cap of the port, and then separating the needle of the syringe, and then taking the syringe to connect the three-way connector port to draw blood. After the blood is drawn, the syringe filled with sealing fluid is connected to the three-way port to flush the arterial catheter. This blood drawing method has the following problems:

[0004] (1) During the operation, the syringe needs to be repeatedly replaced to operate at the port of the three-way connector, which takes a long time and is inefficient. At the same time, the three-way connector has many lumens and gaps, which easily leave blood stains and are difficult to flush;

[0005] (2) During the blood drawing process, the three-way port needs to be opened to draw blood. During this process, the inner cavity of the catheter is connected to the outside world, which is easy to contaminate the inner cavity of the catheter, thereby easily causing the risk of blood infection. In addition, during the blood drawing process, it is easy for the blood in the catheter to be directly connected to the atmosphere, which is very likely to form thrombosis and block the arterial catheter, thereby causing more serious complications for the patient;

[0006] (3) After use, the needle of the existing arterial catheter needs to be consciously sealed by medical staff to avoid accidental injury to the patient and the staff who clean the medical equipment. However, due to the high actual work intensity of medical staff, it is easy to forget to seal the needle and cause accidental injury.

[0007] Therefore, an arterial catheter blood drawing device is proposed, which is easy to operate, has fewer lumens, is easier to flush the lumens, has better sealing, can draw blood without opening the port, and can automatically cover the needle after use to avoid puncture injuries. Utility Model Content

[0008] In order to solve the above technical problems, the utility model designs an arterial catheter blood drawing device, including a catheter with an infusion pressurizer, a dropper, a flow controller, and an elastic perfusion controller arranged in sequence from the head end, and the elastic perfusion controller is used to control the flushing of the catheter; it also includes a connecting tube that is detachably connected to the catheter and is sequentially provided with a clamp and an anti-reflux rubber cap, a rubber cap opening is arranged in the center of the anti-reflux rubber cap, and the head end of the connecting tube can be clamped by the clamp, and then a syringe is used to puncture the rubber cap opening of the anti-reflux rubber cap for blood drawing, without the need for an open port, with better sealing, and only one pipeline with less lumen, which is convenient for flushing the catheter; it also includes an arterial puncture guide needle that is detachably connected to the end of the connecting tube, which is used for puncturing the artery, and the arterial puncture guide needle is provided with a protective shell that can automatically cover the guide needle, and when the arterial puncture guide needle is pulled out after the use of the arterial catheter, the protective shell can automatically cover the guide needle to avoid puncture.

[0009] In order to achieve the above technical purpose, the utility model is realized by the following technical scheme: an arterial catheter blood drawing device, comprising a catheter with an infusion pressurizer, a dropper, a flow controller, and an elastic perfusion controller arranged in sequence from the head end;

[0010] It also includes a connecting tube which is detachably connected to the catheter and is provided with a clamp and an anti-reflux rubber cap in sequence; a rubber cap opening is provided in the center of the anti-reflux rubber cap;

[0011] It also includes an arterial puncture guide needle that is detachably connected to the end of the connecting tube, and the arterial puncture guide needle is provided with a protective shell that can automatically cover the guide needle.

[0012] Preferably, a control button is provided in the center of the elastic perfusion controller, and the elastic perfusion controller is also provided with a sensor connection line connected to the pressure sensor;

[0013] Preferably, the connecting tube head end is provided with a first connector connected with the conical thread at the end of the catheter, and the connecting tube end is provided with a second connector connected with the conical thread at the bottom of the arterial puncture guide needle;

[0014] Preferably, the arterial puncture guide needle comprises a needle handle, a guide needle, and a protective shell, the lower part of the needle handle is connected to the second joint with a conical thread, the upper part of the needle handle is integrally connected to the guide needle, and the bottom of the protective shell is movably connected to the needle handle;

[0015] Preferably, a connecting column is provided at the bottom of the protective shell as a hinge axis connected to the needle handle, and a reset torsion spring is provided at the hinge. When the reset torsion spring is in the initial state, the protective shell completely covers the guide needle tip. The protective shell is configured to be semi-cylindrical, and a protective cap is provided on the top, and a sponge filling layer is also provided at the bottom of the protective cap.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model connects the catheter to the connecting tube, and sets an anti-reflux rubber cap on the connecting tube to replace the conventional three-way joint, thereby reducing the number of tube lumens, making flushing the tube cleaner and more convenient. When drawing blood, the rubber cap opening of the anti-reflux rubber cap can be directly punctured with a syringe to draw blood. The sealing is good, avoiding contact between the tube lumen and the outside world, avoiding contamination of the inner lumen of the catheter, reducing the risk of blood infection, and avoiding the formation of thrombus and blockage of the arterial catheter due to the blood in the catheter being directly connected to the atmosphere, thereby causing more serious complications for the patient;

[0018] (2) The utility model provides a protective shell to achieve automatic needle sealing after use, thereby preventing medical staff from forgetting to seal the needle and causing accidental injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the existing arterial duct structure;

[0021] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the connecting pipe structure of the utility model;

[0023] Figure 4 yes Figure 3 Schematic diagram of the local structure;

[0024] Figure 5 It is a schematic diagram of the protective shell structure of the utility model;

[0025] In the accompanying drawings, the structural names represented by the reference numerals are:

[0026] 1-infusion pressurizer, 2-dropper, 3-catheter, 4-flow controller, 5-elastic perfusion controller, 51-perfusion button, 52-sensor connecting line, 6-connecting tube, 61-first connector, 62-second connector, 7-clamp, 8-anti-reflux rubber cap, 81-rubber cap mouth, 9-pulse puncture guide needle, 91-needle handle, 92-guide needle, 93-protective shell, 931-connecting column, 9311-reset torsion spring, 932-protective cap, 933-sponge filling layer. DETAILED DESCRIPTION

[0027] In order to solve the Figure 1 The existing arterial catheter shown in the figure is used to draw blood through a three-way connector. When in use, it is necessary to repeatedly change the syringe to operate at the port of the three-way connector, which takes a long time and is inefficient. At the same time, the three-way connector has many lumens and gaps, which are easy to leave blood stains, and it is difficult to rinse the tube clean; and in the process of drawing blood, it is necessary to open the three-way port to draw blood. During this process, the inner cavity of the catheter is connected to the outside world, which is easy to contaminate the inner cavity of the catheter, thereby easily causing the risk of blood infection, and when drawing blood, it is easy to cause the blood in the catheter to be directly connected to the atmosphere, which is extremely easy to form thrombosis and block the arterial catheter, thereby causing more serious complications for the patient; at the same time, the needle of the existing arterial catheter needs to be consciously sealed by medical staff after use to avoid accidental injury to the patient and the staff who clean the medical equipment with the needle, but due to the high actual work intensity of medical staff, it is easy to forget to seal the needle and cause accidental injury.

[0028] The utility model designs an arterial catheter 3 blood drawing device, comprising a catheter 3 on which an infusion pressurizer 1, a dropper 2, a flow controller 4, and an elastic perfusion controller 5 are sequentially arranged from the head end, and the elastic perfusion controller 5 is used to control flushing of the catheter; it also includes a connecting tube 6 that is detachably connected to the catheter 3 and is sequentially provided with a clamp 7 and an anti-reflux rubber cap 8, a rubber cap opening 81 is arranged in the center of the anti-reflux rubber cap 8, the head end of the connecting tube 6 can be clamped and closed by the clamp 7 to prevent blood from flowing back into the catheter 3, and then a syringe is used to puncture the rubber cap opening 81 of the anti-reflux rubber cap 8 for blood drawing, without the need for an open port, with better sealing performance, and only one pipeline with less lumen, which is convenient for flushing the catheter; it also includes an arterial puncture guide needle 9 that is detachably connected to the end of the connecting tube 6 and is used for puncturing the artery, the arterial puncture guide needle 9 is provided with a protective shell 93 that can automatically cover the guide needle 92, and when the arterial puncture guide needle 9 is pulled out after the use of the arterial catheter 3, the protective shell 93 can automatically cover the guide needle 92 to avoid puncture.

[0029] 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.

[0030] Example 1

[0031] Based on the above, see Figures 2 to 4 As shown, in this embodiment, a control button is set in the center of the elastic perfusion controller 5, and the elastic perfusion controller 5 is also provided with a sensor connection line 52 connected to the pressure sensor. The medical staff squeezes the control button to control the negative pressure in the catheter 3, so that the pressurized liquid in the infusion pressurizer 1 can pass through the pipeline and be flushed into the body, thereby achieving the effect of flushing the tube.

[0032] A first connector 61 is provided at the head end of the connecting tube 6 to be connected with the conical thread at the end of the catheter 3, and a second connector 62 is provided at the end of the connecting tube 6 to be connected with the conical thread at the bottom of the arterial puncture guide needle 9. The conical connection has excellent sealing properties to prevent external air from contacting the blood in the tube cavity.

[0033] The arterial puncture guide needle 9 includes a needle handle 91, a guide needle 92, and a protective shell 93. The lower part of the needle handle 91 is connected to the second joint 62 with a conical thread, and the upper part of the needle handle 91 is integrally connected to the guide needle 92. Medical personnel hold the needle handle 91 to puncture the guide needle 92 into the human artery for use. The bottom of the protective shell 93 is movably connected to the needle handle 91, and can automatically cover the guide needle 92 when it is pulled out after use to prevent it from stabbing others.

[0034] Example 2

[0035] Based on Example 1, refer to Figure 5As shown, in this embodiment, a connecting column 931 is provided at the bottom of the protective shell 93 as a hinge axis connected to the needle handle 91, and a reset torsion spring 9311 is provided at the hinge. When the reset torsion spring 9311 is in the initial state, the protective shell 93 completely covers the needle tip of the guide needle 92. The protective shell 93 is set in a semi-cylindrical shape, and a protective cap 932 is provided on the top. A sponge filling layer 933 is also provided at the bottom of the protective cap 932. When the guide needle 92 is punctured into the patient's artery, the top protective cap 932 is supported by the reset spring and is accompanied by When the guide needle 92 penetrates deeply, the protective shell 93 is moved back as a whole away from the guide needle 92 with the support of the patient's skin surface, which does not affect the puncture. When the guide needle 92 is pulled out after use, as the guide needle 92 is pulled out, the protective cap 932 gradually loses the support of the skin. When the guide needle 92 is completely pulled out, the reset torsion spring 9311 is reset, and the protective shell 93 covers the guide needle 92. The protective cap 932 on the top completely covers the needle tip, and the sponge filling layer 933 can completely cover the needle tip to prevent the residual liquid at the needle tip from flowing down and polluting the environment.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all details in detail, nor do they limit the utility model to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification.

Claims

1. An arterial catheter blood drawing device, comprising a catheter with an infusion pressurizer, a dropper, a flow controller, and an elastic perfusion controller arranged in sequence from the head end; further comprising a connecting tube detachably connected to the catheter and provided with a clamp; further comprising an arterial puncture guide needle detachably connected to the end of the connecting tube, characterized in that: The connecting tube is also provided with an anti-reflux rubber cap behind the clamp, and a rubber cap opening is provided in the center of the anti-reflux rubber cap; the arterial puncture guide needle is provided with a protective shell which can automatically cover the guide needle.

2. The arterial catheter blood drawing device according to claim 1, characterized in that: A control button is arranged in the center of the elastic perfusion controller, and a sensor connecting line is also arranged on the elastic perfusion controller to be connected with the pressure sensor.

3. The arterial catheter blood drawing device according to claim 1, characterized in that: The connecting tube head end is provided with a first joint connected with the conical thread of the catheter end, and the connecting tube end is provided with a second joint connected with the conical thread of the bottom of the arterial puncture guide needle.

4. The arterial catheter blood drawing device according to claim 1, characterized in that: The arterial puncture guide needle comprises a needle handle, a guide needle and a protective shell; the lower part of the needle handle is connected to the second joint with a conical thread; the upper part of the needle handle is integrally connected to the guide needle; and the bottom of the protective shell is movably connected to the needle handle.

5. The arterial catheter blood drawing device according to claim 4, characterized in that: A connecting column is arranged at the bottom of the protective shell as a hinge axis connected to the needle handle, and a reset torsion spring is arranged at the hinge. When the reset torsion spring is in the initial state, the protective shell completely covers the guide needle tip. The protective shell is arranged in a semi-cylindrical shape, and a protective cap is arranged on the top, and a sponge filling layer is also arranged at the bottom of the protective cap.

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