Tunnel needle suitable for multi-cavity venous catheter

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a tunnel needle suitable for a multi-cavity venous catheter, which comprises a needle head body, a needle head sleeve is fixedly arranged at the other end of the needle head body, an inlet isolation chamber is arranged in the needle head sleeve, the needle head sleeve is made of transparent materials, a transfusion pipeline is fixedly arranged on the outer side of the needle head sleeve, and the transfusion pipeline is communicated with the inlet isolation chamber. A connecting pipeline is fixedly arranged at the other end of the infusion pipeline, a heparin cap is fixedly arranged on the inner wall of one end of the connecting pipeline, a pressure pipeline is fixedly arranged on the outer side of the connecting pipeline, a sliding column is arranged in the pressure pipeline in a sliding mode, and a sealing piece is fixedly arranged at one end of the sliding column. Clamping teeth are fixedly arranged at one end of the single-hand liquid stopping clamp, tooth grooves are fixedly formed in the other end of the single-hand liquid stopping clamp, and the clamping teeth and the tooth grooves are embedded, and through the scheme, the problems that in the using process, medical workers cannot conveniently use the liquid stopping clamp, a large amount of time and energy of the medical workers are wasted, and the surgical risk of patients is increased are solved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a tunnel needle suitable for multi-lumen venous catheters. Background Technology

[0002] Currently, the methods of intravenous treatment are becoming increasingly diverse, among which tunneled venous catheters are also widely used in clinical practice. Traditional methods of inserting venous catheters, due to the lack of subcutaneous tunnels, have a significantly higher complication rate of infection and catheter slippage than tunneled venous catheters. In clinical practice, some patients require the insertion of multi-lumen venous catheters for treatment purposes.

[0003] Meanwhile, patent application number 202221588226.4, entitled "A Tunnel Needle for Multi-lumen Vein Catheters," includes a tunnel needle core and a tunnel needle outer sheath. The tunnel needle outer sheath is a hollow tubular structure. The diameter of the tunnel needle core is slightly smaller than the inner diameter of the tunnel needle outer sheath. After the tunnel needle core passes through the tunnel needle outer sheath, it can fit tightly with the tunnel needle outer sheath. A catheter puncture point is pre-placed on the patient's skin. One end of the multi-lumen vein catheter enters the patient's vein through the catheter puncture point. A tunnel exit is pre-placed on the patient's skin. The tunnel needle core and the tunnel needle outer sheath are combined to form a tunnel needle. The tunnel needle enters the subcutaneous fat layer from the tunnel exit and passes through the subcutaneous fat layer to exit from the catheter puncture point. The tunnel needle forms a subcutaneous tunnel in the subcutaneous fat layer between the tunnel exit and the catheter puncture point. The subcutaneous tunnel is used to implant part of the multi-lumen vein catheter. The tunnel needle provided by this utility model is suitable for multi-lumen vein catheters and can reduce infection and catheter slippage rates.

[0004] However, the following problems were found in the implementation of the relevant technology: a tunnel needle suitable for multi-lumen venous catheters was found to be inconvenient for medical staff to use, wasting a lot of time and energy of medical staff and increasing the surgical risk for patients. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a tunnel needle suitable for multi-lumen venous catheters, which has the advantages of being easy for medical staff to use, saving them a lot of time and energy, and reducing the surgical risks for patients.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tunnel needle suitable for multi-lumen venous catheters, comprising a needle body, a needle sheath fixedly provided at the other end of the needle body, an inlet isolation chamber provided inside the needle sheath, and the needle sheath being made of transparent material, an infusion tube fixedly provided on the outside of the needle sheath, a connecting tube fixedly provided at the other end of the infusion tube, and a heparin cap fixedly provided on the inner wall of one end of the connecting tube.

[0007] Preferably, a pressure pipe is fixedly provided on the outside of the connecting pipe, and a sliding column is slidably provided inside the pressure pipe, with a sealing plate fixedly provided at one end of the sliding column.

[0008] Preferably, a single-handed stop clamp is fitted on the outside of the infusion pipeline. One end of the single-handed stop clamp is fixedly provided with a locking tooth, and the other end of the single-handed stop clamp is fixedly provided with a tooth groove, and the locking tooth and the tooth groove are engaged.

[0009] Preferably, a single-winged needle holder is fixedly provided on the outer side of the needle sheath.

[0010] Preferably, a spring is fitted on the outer side of the sliding column, and the other end of the spring is fixedly connected to the inner wall of the pressure pipe.

[0011] Preferably, a spiral cap is fitted on the outside of the pressure pipe, and a compression column is fixed inside the spiral cap, with the other end of the compression column fitting against the outside of the sliding column.

[0012] Preferably, a protective shell is fixedly fitted on the outside of the connecting pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, through the design of the needle body, allows medical personnel to first pinch the single-wing needle holder, which moves the needle body to insert it into the vein. The needle sheath protects the needle body, the inlet isolation chamber ensures airtightness and prevents leakage, the infusion tubing is used for infusion, and the single-handed stop clamp allows for one-handed operation. Pressing the single-handed stop clamp engages the teeth on one side, squeezing the infusion tubing to prevent negative pressure backflow. The protective shell on the outer side of the connecting pipe at the other end of the infusion tubing provides further protection. The heparin cap has high transparency for easy observation and prevents leakage during repeated punctures. The pressure tubing controls the pressure. Rotating the screw cap moves the squeezing column, which in turn moves the sliding column, which in turn moves the sealing plate. The spring undergoes elastic deformation to stretch and contract, thus facilitating use by medical personnel, saving them significant time and effort, and reducing the surgical risks for patients. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the present invention.

[0017] Figure 3 This utility model Figure 2 A schematic diagram of structure A;

[0018] Figure 4 This utility model Figure 2 A schematic diagram of the B structure.

[0019] In the diagram: 1. Needle body; 2. Needle cannula; 3. Inlet isolation chamber; 4. Single-wing needle holder; 5. Infusion tubing; 6. Single-hand stop clamp; 7. Clamping teeth; 8. Tooth groove; 9. Connecting tubing; 10. Protective shell; 11. Heparin cap; 12. Pressure tubing; 13. Sealing plate; 14. Sliding column; 15. Spring; 16. Squeezing column; 17. Spiral cap. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 4 As shown, this utility model provides a tunnel needle suitable for multi-lumen venous catheters, including a needle body 1, with a needle sheath 2 fixedly provided at the other end of the needle body 1. The needle sheath 2 is used to protect the needle body 1. An inlet isolation chamber 3 is opened inside the needle sheath 2 to ensure airtightness and prevent leakage. The needle sheath 2 is made of transparent material. An infusion tube 5 is fixedly provided on the outside of the needle sheath 2 for infusion. A connecting tube 9 is fixedly provided at the other end of the infusion tube 5. A heparin cap 11 is fixedly provided on the inner wall of one end of the connecting tube 9. The heparin cap 11 has high transparency, is easy to observe, and does not leak after repeated punctures.

[0022] Specifically, a pressure pipe 12 is fixedly provided on the outside of the connecting pipe 9. The pressure pipe 12 is used to control the pressure. A sliding column 14 is slidably provided inside the pressure pipe 12. A sealing plate 13 is fixedly provided at one end of the sliding column 14. The movement of the sliding column 14 drives the sealing plate 13 to move.

[0023] Furthermore, a single-handed stop clamp 6 is fitted on the outside of the infusion tubing 5. One end of the single-handed stop clamp 6 is fixed with a locking tooth 7, and the other end of the single-handed stop clamp 6 is fixed with a toothed groove 8. The locking tooth 7 and the toothed groove 8 are engaged. Pressing the single-handed stop clamp 6 will insert the locking tooth 7 on one side of the single-handed stop clamp 6 into the inside of the toothed groove 8, thereby squeezing the infusion tubing 5 to prevent negative pressure backflow.

[0024] Furthermore, a single-wing needle holder 4 is fixedly provided on the outside of the needle cannula 2. When using it, medical staff will first pinch the single-wing needle holder 4 to facilitate its use.

[0025] It is worth noting that a spring 15 is sleeved on the outside of the sliding column 14, and the other end of the spring 15 is fixedly connected to the inner wall of the pressure pipe 12. The spring 15 undergoes elastic deformation to stretch and contract.

[0026] It is worth noting that a spiral cap 17 is fitted on the outside of the pressure pipe 12. The rotation of the spiral cap 17 drives the extrusion column 16 to move. The extrusion column 16 is fixed inside the spiral cap 17, and the other end of the extrusion column 16 is in contact with the outside of the sliding column 14. The movement of the extrusion column 16 drives the sliding column 14 to move.

[0027] It is worth mentioning that a protective shell 10 is fixedly fitted on the outside of the connecting pipe 9, and the protective shell 10 on the outside of the connecting pipe 9 connected to the other end of the infusion pipe 5 is used for protection.

[0028] Working principle: When using the device, medical personnel first pinch the single-wing needle holder 4, which moves the needle body 1, inserting it into the vein. The needle sheath 2 protects the needle body 1. The inlet isolation chamber 3 ensures a tight seal and prevents leakage. The infusion tubing 5 is used for infusion. The single-handed stop clamp 6 allows for one-handed operation. Pressing the single-handed stop clamp 6 engages the locking teeth 7 on one side of the clamp, compressing the infusion tubing 5 to prevent negative pressure backflow. The other end of the infusion tubing 5 is connected to a connecting pipe. The outer protective shell 10 is used for protection. The heparin cap 11 has high transparency for easy observation and does not leak after repeated punctures. The pressure pipe 12 is used to control the pressure. Rotating the screw cap 17 causes the squeezing column 16 to move. The movement of the squeezing column 16 causes the sliding column 14 to move. The movement of the sliding column 14 causes the sealing plate 13 to move. The spring 15 undergoes elastic deformation to stretch and contract, thereby making it easy for medical staff to use during use, saving them a lot of time and energy, and reducing the surgical risk for patients.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunneling needle suitable for use with a multi-lumen venous catheter, comprising a needle body (1), characterized in that: Another end of the needle body (1) is fixedly provided with a needle sleeve (2), an import isolation chamber (3) is formed in the needle sleeve (2), the needle sleeve (2) is made of transparent material, an infusion pipeline (5) is fixedly arranged outside the needle sleeve (2), a connecting pipeline (9) is fixedly arranged at another end of the infusion pipeline (5), a heparin cap (11) is fixedly arranged on an inner wall of one end of the connecting pipeline (9); One end of the infusion pipeline (5) is sleeved with a single-hand liquid stopping clamp (6), the single-hand liquid stopping clamp (6) is fixedly provided with a clamping tooth (7) at one end, and is fixedly provided with a tooth groove (8) at another end, and the clamping tooth (7) is embedded in the tooth groove (8). The outer side of the needle sleeve (2) is fixedly provided with a single-wing needle holding piece (4).

2. A tunneling needle suitable for use with a multi-lumen venous catheter according to claim 1, wherein: The outer side of the connecting pipeline (9) is fixedly provided with a pressure pipeline (12), a sliding column (14) is slidably arranged in the pressure pipeline (12), and a sealing piece (13) is fixedly arranged at one end of the sliding column (14).

3. A tunneling needle suitable for use with a multi-lumen venous catheter according to claim 2, wherein: The outer side of the sliding column (14) is sleeved with a spring (15), and another end of the spring (15) is fixedly connected with the inner wall of the pressure pipeline (12).

4. A tunneling needle suitable for use with a multi-lumen venous catheter according to claim 3, wherein: The outer side of the pressure pipeline (12) is sleeved with a screw cap (17), the screw cap (17) is fixedly provided with an extrusion column (16) in the inside, and the other end of the extrusion column (16) is attached to the outer side of the sliding column (14).

5. A tunneling needle suitable for use with a multi-lumen venous catheter according to claim 1, wherein: The outer side of the connecting pipeline (9) is fixedly sleeved with a protective shell (10).

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