Internal jugular intravenous infusion port tunnel needle with local infiltration anesthesia function

Abstract

The utility model relates to an internal jugular vein infusion port tunnel needle with a local infiltration anesthesia function. The main structure comprises a tunnel needle and a needle core, the tunnel needle is a hollow blunt stainless steel rod, anesthesia holes with passivated edges are uniformly distributed in a needle head, and a limiting ring matched with a limiting block at the top end of the needle core is arranged in the needle head. The needle core is cylindrical and hollow, the anesthesia hole of the needle head corresponds to the tunnel needle, the tail end of the needle core is provided with a threaded connector matched with an infusion port pipeline, and the rotation angle of the needle core and the tail end of the tunnel needle is limited through a limiting device of a specific structure. In the surgical operation, anesthetic is injected synchronously when a tunnel is established, the coincidence degree of the anesthesia holes is adjusted by rotating the needle core, and then the flow speed of the anesthetic is controlled. According to the internal jugular vein infusion port implanter, precise anesthesia can be achieved, the pain of a patient is effectively relieved, the operation safety is improved, meanwhile, the operation process is simplified, the operation efficiency is improved, and the good instrument stability and applicability of the internal jugular vein infusion port implanter have positive significance on development of internal jugular vein infusion port implanter implantation.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a jugular vein infusion port tunnel needle with local infiltration anesthesia function. Background Technology

[0002] Internal jugular vein port-a-cath implantation is a relatively new procedure and currently the most commonly used intravenous access for comprehensive cancer treatment. The procedure involves major blood vessels in the neck and the anterior cervical region, and is performed under local infiltration anesthesia. Patient cooperation is often difficult, leading to high surgical risks and a high complication rate. This places high demands on the surgeon performing the procedure and the instruments used. In recent years, advancements in surgical instruments and optimization of surgical techniques have significantly contributed to improving surgical quality and reducing risks.

[0003] The standard procedure for port-a-cath surgery is as follows: The right internal jugular vein and the subcutaneous tissue of the right anterior chest wall are selected as the puncture and port-a-cath insertion areas. Routine disinfection and draping are performed, and local anesthesia with lidocaine is administered. After successful puncture of the right internal jugular vein, the port-a-cath catheter is inserted. A 3cm incision is made in the skin about two fingerbreadths below the right anterior chest wall, and the subcutaneous tissue is dissected to form a pocket. Local infiltration anesthesia is administered along the top of the incision towards the puncture site of the right internal jugular vein. The subcutaneous space is fully expanded with local anesthetic, and a tunneling needle is used to create a tunnel along the subcutaneous space. The port-a-cath catheter is then introduced from the puncture site through the subcutaneous tissue into the pocket, connecting the port to the catheter, and the port is implanted. The incision is sutured, bandaged, and the catheter is sealed with heparinized saline. The procedure is complete.

[0004] It can be seen that in all current routine port-a-cath surgeries, local infiltration anesthesia for the anterior cervical access and tunnel establishment are performed using syringes and tunneling needles respectively. Both enter the same level, and the procedures are closely linked. However, during routine procedures, discrepancies between the local infiltration anesthesia level and the tunneling needle insertion level frequently occur, causing severe pain to the patient or direct skin damage from the tunneling needle. Even skilled surgeons cannot guarantee that the planes and spaces of the two procedures are completely consistent. If an instrument could be developed to combine these two steps, it would significantly reduce the patient's pain from two subcutaneous punctures, simplify the surgical procedure, improve surgical safety, and thus promote the development of port-a-cath and related venous treatment surgeries. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that local infiltration anesthesia and tunnel establishment for the anterior cervical access need to be performed in two separate procedures.

[0006] To achieve the above objectives, the technical approach adopted by this utility model to solve its technical problem is as follows: A tunnel needle with local infiltration anesthesia function for internal jugular vein infusion ports is designed, comprising a tunnel needle and a rotatable needle core disposed therein. The tunnel needle and needle core are hollow inside, and the needle tip is evenly provided with anesthesia holes. During surgery, the tunnel needle is inserted under the patient's skin, and the needle core is rotated. The anesthesia holes on the tunnel needle and needle core overlap to different degrees. After adjusting to a suitable degree of overlap, the anesthetic is injected from the tail of the needle core. During the injection process, the flow rate of the anesthetic can also be adjusted by rotating the needle core.

[0007] A threaded connector adapted to an infusion port is installed at the tail of the needle core. During anesthesia injection, a flexible tube similar to an infusion port can be connected to it, with the other end of the tube connected to a syringe. After the injection is completed, when the tunnel needle is punctured to the appropriate position, the threaded connector is connected to the infusion port catheter and introduced into the pouch subcutaneously from the puncture point.

[0008] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0009] Design a jugular vein infusion port tunnel needle with local infiltration anesthesia function. Specific details are as follows:

[0010] A tunnel needle for an internal jugular vein infusion port with local infiltration anesthesia function includes a tunnel needle and a needle core. The tunnel needle has a hollow structure, and the needle core is rotatably disposed within the cavity of the hollow structure of the tunnel needle. Both the needle core and the tip of the tunnel needle are provided with corresponding and through anesthesia holes, and the tail end of the needle core is provided with a threaded connector adapted to the infusion port tubing.

[0011] Furthermore, a limiting device is provided at the end of the needle core and the tunnel needle to limit the rotation angle of the needle core.

[0012] Furthermore, the limiting device includes a groove disposed at the end of the tunnel needle and a slider disposed at the end of the needle core. The slider is slidably abutted against the groove, and the groove is used to limit the sliding distance of the slider.

[0013] Furthermore, the groove is a U-shaped recess protruding from the surface of the tunnel needle and its opening faces the end of the tunnel needle.

[0014] Furthermore, the slider slides within the groove to control the degree of overlap between the anesthesia holes on the needle core and the tunnel needle.

[0015] Furthermore, the threaded connector and the needle core are internally connected.

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

[0017] The anesthesia function is integrated into the tunnel needle. The anesthesia port overlap can be adjusted by rotating the needle core to control the flow rate and diffusion range. Anesthesia can be adjusted in real time according to the patient's condition to avoid severe pain caused by inconsistency between the anesthesia and the tunnel plane. For example, in neck surgery, it can reduce insufficient anesthesia due to operation errors and improve surgical comfort. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of section A;

[0020] Figure 3 This is a schematic cross-sectional view of the present invention.

[0021] Figure 4 for Figure 3 Enlarged view of section C;

[0022] Figure 5 for Figure 3 Enlarged view of section B;

[0023] Figure 6 This is a schematic diagram of the exploded structure of this utility model;

[0024] The above figures include the following reference numerals:

[0025] 10. Tunnel needle; 11. Limiting ring; 20. Needle core; 21. Threaded connector; 30. Anesthesia hole; 40. Limiting device; 41. Slide groove; 42. Slider. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0027] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] refer to Figure 1-6 This utility model provides a tunnel needle for internal jugular vein infusion port with local infiltration anesthesia function, including a tunnel needle 10 and a needle core 20.

[0029] In practice, the tunnel needle 10 is a hollow, blunt-tipped stainless steel rod. The needle tip has the same shape as a traditional tunnel needle, with a rounded, blunt tip, a length of approximately 30 cm, and a diameter of approximately 3 mm. It will not cause sharp damage to surrounding tissues during subcutaneous advancement. Several anesthesia holes 30 are evenly distributed around the circumference above the needle tip. The edges of the anesthesia holes 30 are blunted to prevent scratches caused by friction with tissues during subcutaneous puncture.

[0030] A limiting ring 11 is provided inside the tunnel needle 10, located below the anesthesia port 30. The limiting ring 11 engages with the top of the needle core 20, effectively preventing the needle core 20 from shifting throughout the surgery. In practical applications, as long as it does not obstruct the anesthesia port 30 and restricts the vertical movement of the needle core 20, the limiting ring 11 can be flexibly positioned inside the tunnel needle 10. For example, if the position of the needle core 20 needs to be adjusted during surgery to control the flow rate of the anesthetic, the limiting ring 11 ensures that the needle core 20 will not shift during the adjustment process, thus ensuring the relative position of the anesthesia port 30 remains stable.

[0031] In practice, the needle core 20 is a cylindrical hollow stainless steel rod with a limiting block at its top that mates with the limiting ring 11. The limiting block can rotate and slide on the limiting ring 11, thus rotatably mounting inside the tunnel needle 10. The anesthesia holes 30 at the needle tip of the needle core 20 are the same size as those on the tunnel needle 10 and correspond one-to-one. During use, rotating the needle core 20 changes the degree of overlap of the anesthesia holes 30, thereby adjusting the flow rate of the anesthetic. When rotating the needle core 20 makes the anesthesia holes 30 completely overlap, the flow rate of the anesthetic reaches its maximum; if they are completely misaligned, the anesthetic cannot flow out. For example, if insufficient subcutaneous space expansion is found, the opening degree of the anesthesia holes 30 can be appropriately increased; if the anesthetic diffuses too quickly, the opening degree of the anesthesia holes 30 can be decreased. If the patient's subcutaneous tissue is relatively loose, a larger opening of the anesthesia orifice 30 may be needed to ensure that the anesthetic can diffuse quickly; while for patients with denser subcutaneous tissue, the opening of the anesthesia orifice 30 can be appropriately reduced to control the outflow rate of the anesthetic and avoid excessive local pressure caused by excessively rapid diffusion.

[0032] The needle core 20 has a threaded connector 21 at its tail end that is compatible with the infusion port tubing. The threaded connector 21 and the needle core 20 are internally connected, and the tail end has an opening. The threaded connector 21 and the needle core 20 are integrally formed. During anesthesia injection, a flexible tube similar to the infusion port tubing can be connected to the threaded connector 21, and the other end of the flexible tube can be connected to a syringe. After injection, the flexible tube is removed. When the tunnel needle is inserted to the appropriate position, the threaded connector 21 connects to the infusion port catheter, and the infusion port catheter is introduced into the pocket subcutaneously from the puncture point. For example, during surgery, when the anesthesia injection is completed and the infusion port catheter needs to be introduced into the pocket, the doctor only needs to screw the infusion port catheter to the threaded connector 21, and then slowly withdraw the tunnel needle 10 to smoothly introduce the catheter into the pocket. The operation is convenient and the connection is secure, eliminating the need for secondary insertion and reducing patient discomfort.

[0033] In practice, the needle core 20 and the tunnel needle 10 are equipped with a limiting device 40 at their tail ends to restrict the rotation angle of the needle core 20. This device includes a groove 41 located at the tail end of the tunnel needle 10 and a slider 42 located at the tail end of the needle core 20 (specifically above the threaded connector 21), the slider 42 being adapted to the groove 41. When the needle core 20 rotates within the tunnel needle 10, it drives the slider 42 to slide within the groove 41. When the anesthesia holes 30 are completely aligned, the slider 42 slides precisely to one end of the groove 41; when the anesthesia holes 30 are not completely aligned, the slider 42 slides precisely to the other end of the groove 41. This design helps the surgeon precisely control the degree of alignment of the anesthesia holes 30 during surgery, thereby accurately controlling the flow rate of the anesthetic. For example, during operation, the surgeon can intuitively understand the alignment state of the anesthesia holes 30 by observing the position of the slider 42 within the groove 41, and then make adjustments according to the surgical needs. If it is necessary to increase the flow rate of the anesthetic, the doctor can rotate the needle core 20 to make the slider 42 slide in the direction of coinciding with the anesthesia orifice 30 until the appropriate flow rate is achieved.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An internal jugular vein infusion port tunneling needle with partial infiltration anesthesia function, comprising a tunneling needle (10) and a needle core (20), characterized in that, The tunnel needle (10) is a hollow structure, the needle core (20) is rotatably arranged in the cavity of the hollow structure of the tunnel needle (10); the needle core (20) and the needle head of the tunnel needle (10) are provided with one-to-one and through anesthetic holes (30), and the tail end of the needle core (20) is provided with a threaded connector (21) matched with the infusion port pipeline.

2. The internal jugular vein infusion port tunneling needle with partial infiltration anesthesia function according to claim 1, characterized in that, The tail end of the needle core (20) and the tunnel needle (10) is provided with a limiting device (40) for limiting the rotation angle of the needle core (20).

3. The internal jugular vein infusion port tunneling needle with partial infiltration anesthesia function according to claim 2, characterized in that, The limiting device (40) includes a sliding groove (41) arranged at the end of the tunnel needle (10) and a sliding block (42) arranged at the end of the needle core (20), the sliding block (42) is slidably abutted in the sliding groove (41), and the sliding groove (41) is used for limiting the sliding distance of the sliding block (42).

4. The internal jugular vein infusion port tunneling needle with partial infiltration anesthesia function according to claim 3, characterized in that, The sliding groove (41) is a U-shaped groove protruding from the surface of the tunnel needle (10) and opening towards the end of the tunnel needle (10).

5. The internal jugular vein infusion port tunneling needle with partial infiltration anesthesia function according to claim 3, characterized in that, The sliding block (42) slides in the sliding groove (41), which is used for controlling the coincidence degree of the anesthetic holes (30) on the needle core (20) and the tunnel needle (10).

6. The internal jugular vein infusion port tunneling needle with partial infiltration anesthesia function according to claim 1, characterized in that, The threaded connector (21) and the needle core (20) are through.

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