Auxiliary fixing device for central vein puncture needle

Abstract

The invention discloses an auxiliary fixing device for a central vein puncture needle, and belongs to the field of central vein puncture, the auxiliary fixing device for the central vein puncture needle comprises a placing plate, the right side end of the placing plate is fixedly connected with a first limiting plate, the upper end of the placing plate is provided with a cover plate, and the cover plate is located on the left side of the first limiting plate; a puncture needle is arranged between the inner walls of the containing plate, two symmetrically-distributed bases are fixedly connected to the lower end of the containing plate, in the insertion process of the puncture needle, the puncture needle is placed in the containing plate to be clamped, then puncture work is conducted, and after the puncture needle is placed in a central vein, the puncture needle can be inserted into the central vein under the action of a telescopic rod and a supporting assembly. The whole body is arranged on a plane, and the height and the inclination angle of the puncture needle in the central vein are kept unchanged, so that an operator does not need to hold the puncture needle continuously, the two hands of the operator are liberated, and meanwhile, the phenomenon that the position of the puncture needle in the central vein deviates due to shaking when the hand is suspended is also avoided.

Description

Technical Field

[0001] This invention relates to the field of central venous puncture, and more specifically, to an auxiliary fixation device for a central venous puncture needle. Background Technology

[0002] Central venous catheterization is commonly used for large-volume blood and fluid transfusions, monitoring central venous pressure, interventional procedures, parenteral nutrition, and chemotherapy drug administration. Common puncture sites include the internal jugular vein, subclavian vein, and femoral vein. Typically, after skin disinfection and localization, a central venous catheter is inserted. Once the needle reaches the desired vein, a guidewire is inserted, followed by needle withdrawal. After the skin is dilated with a retractor, a central venous catheter is inserted, the guidewire is removed, and the catheter is sutured in place.

[0003] Currently, during central venous puncture, once the needle reaches the desired vein, the operator typically needs to use one hand to stabilize the needle while using the other to retrieve the guidewire for subsequent catheter placement. During this process, the operator's hand may remain suspended or tightly grip the needle against the skin. Due to limitations in height and puncture location, the needle may shift position and slip out of the vein or become stuck to the vein wall during guidewire retrieval, making subsequent guidewire placement difficult. This can lead to multiple punctures and adjustments, or even failed central venous catheter placement, significantly complicating central venous puncture procedures and reducing efficiency. When patients have acute circulatory failure, severe systemic diseases, or coagulation disorders, repeated punctures not only delay rescue time but may also worsen injuries or even lead to serious cardiovascular or cerebrovascular accidents. Therefore, this invention proposes an auxiliary positioning device for central venous puncture needles. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the present invention aims to provide an auxiliary fixation device for central venous puncture needles. This device allows the puncture needle to be placed and clamped within a placement plate during the puncture process. After the needle is inserted into the central vein, the entire device is positioned on a flat surface through the action of a telescopic rod and a support assembly, maintaining the height and tilt angle of the needle within the central vein. This eliminates the need for the operator to continuously hold the needle, freeing their hands and preventing the needle from shifting due to hand tremors when the hand is suspended in the air. This significantly improves the success rate and safety of central venous puncture.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] An auxiliary fixation device for a central venous puncture needle includes a placement plate, a first limiting plate fixedly connected to the right end of the placement plate, a cover plate installed on the upper end of the placement plate, the cover plate being located to the left of the first limiting plate, a puncture needle disposed between the inner walls of the placement plate, two symmetrically distributed bases fixedly connected to the lower end of the placement plate, a limiting component installed between the cover plate and the bases, a connecting block rotatably connected to the lower end of the bases, a telescopic rod installed at the lower end of the left connecting block, and a support component installed at the lower end of the right connecting block, with suction cups fixedly connected to the lower ends of both the telescopic rod and the support component.

[0009] Furthermore, a hinge is fixedly connected to the side end of the placement plate, and the hinge is rotatably connected to the cover plate.

[0010] Furthermore, an airbag gasket is fixedly connected to the inner top end of the cover plate, and the airbag gasket is made of rubber material.

[0011] Furthermore, the limiting assembly includes a connecting shaft fixedly connected to the side end of the cover plate, a second limiting plate rotatably connected between the inner walls of the connecting shaft, a limiting hole opened at the outer end of the second limiting plate, a limiting groove opened at the side end of the base, the limiting groove and the limiting hole corresponding to each other, a limiting bolt inserted between the inner walls of the limiting hole, and a threaded connection between the limiting bolt and the limiting groove.

[0012] Furthermore, a traction rope is fixedly connected between the limiting bolt and the base, and the traction rope is a spring wire.

[0013] Furthermore, the pivot between the base and the connecting block is a damped pivot.

[0014] Furthermore, two opposite drive switches are installed on the front end of the telescopic rod.

[0015] Furthermore, the support assembly includes a sleeve located below the right connecting block, a support column inserted at the upper end of the sleeve, a slider fixedly connected to the lower end of the support column, the slider contacting the inner wall of the sleeve, a storage groove on one side of the support column, a positioning groove at the outer end of the sleeve, an abutment block slidably connected between the inner walls of the positioning groove, a positioning block between the inner walls of the storage groove, and a tension spring fixedly connected between the positioning block and the side wall of the storage groove.

[0016] Furthermore, a crescent-shaped groove is provided on the side of the suction cup near the placement plate, and the diameter of the crescent-shaped groove matches the bottom of the placement plate.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of this invention are:

[0019] This solution utilizes an auxiliary fixation device to hold the puncture needle above a placement plate during central venous puncture. Once the appropriate height and angle are found, the operator can fix the needle in place, freeing their hands and allowing space to retrieve the guidewire for catheter placement. During this process, the puncture needle within the central vein will not shift, thus avoiding the common problems of needle deviation and slippage within the central vein during conventional puncture procedures, which require multiple adjustments before proceeding. This significantly improves work efficiency and puncture success rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention during use;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention after it has been stored.

[0022] Figure 3 This is a schematic diagram of the structure of the limiting component of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the invention when it is initially unfolded.

[0024] Figure 5 This is a schematic diagram of the structure of the support component of the present invention.

[0025] Explanation of the labels in the diagram:

[0026] 1. Placement plate, 2. First limiting plate, 3. Cover plate, 4. Limiting component, 41. Connecting shaft, 42. Second limiting plate, 43. Limiting hole, 44. Limiting groove, 45. Traction rope, 46. Limiting bolt, 5. Puncture needle, 6. Base, 7. Connecting block, 8. Telescopic rod, 9. Support component, 91. Sleeve, 92. Support column, 93. Slider, 94. Storage groove, 95. Positioning groove, 96. Abutment block, 97. Positioning block, 98. Tension spring, 10. Suction cup. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Example:

[0029] Please see Figure 1-5An auxiliary fixation device for a central venous puncture needle includes a placement plate 1, a first limiting plate 2 fixedly connected to the right end of the placement plate 1, a cover plate 3 installed at the upper end of the placement plate 1, the cover plate 3 being located to the left of the first limiting plate 2, a puncture needle 5 disposed between the inner walls of the placement plate 1, two symmetrically distributed bases 6 fixedly connected to the lower end of the placement plate 1, a limiting component 4 installed between the cover plate 3 and the bases 6, a connecting block 7 rotatably connected to the lower end of the bases 6, a telescopic rod 8 installed at the lower end of the left connecting block 7, a support component 9 installed at the lower end of the right connecting block 7, and suction cups 10 fixedly connected to the lower ends of both the telescopic rod 8 and the support component 9.

[0030] To avoid the shaking caused by prolonged hand-held suspension of the puncture needle in existing technologies, which can lead to needle displacement within the central vein, this solution employs an auxiliary fixation device. During central vein puncture, the puncture needle is placed above the placement plate 1 and clamped before the procedure. Once a suitable height and angle are found, the operator can fix the needle in place, freeing their hands and allowing space to retrieve the guidewire for catheter placement. During this process, the puncture needle within the central vein will not shift.

[0031] In use, the puncture needle 5 is first placed inside the placement plate 1, and then the cover plate 3 is placed on top of it and limited by the limiting component 4. Then, the telescopic rod 8 and the support component 9 can be extended and raised to a certain height according to the appropriate position. Then, the operator adjusts the tilt angle of the placement plate 1 and the height of the placement plate 1 at the same time, so that the puncture needle 5 can be stably and accurately inserted into the central vein. This avoids the phenomenon of the puncture needle deviating inside the central vein when the operator holds the puncture needle or picks up the guide wire during the existing puncture process. At the same time, it also frees the operator's hands during the operation, making the puncture work more convenient.

[0032] Please see Figure 1-4 A hinge is fixedly connected to the side end of the placement plate 1, and the hinge is rotatably connected to the cover plate 3.

[0033] Furthermore, an airbag gasket is fixedly connected to the inner top of the cover plate 3, and the airbag gasket is made of rubber material.

[0034] In order to avoid the phenomenon that some puncture needles are too small and therefore easily shake when placed inside the placement plate 1 during use, an airbag pad is provided at the inner top of the cover plate 3 in this embodiment. When the cover plate 3 is flipped over to the surface of the puncture needle 5, the increased thickness of the airbag pad greatly increases the contact area with the puncture needle 5, thereby completing the positioning and clamping of the puncture needle 5. Furthermore, when clamping a puncture needle of too large a size, the airbag pad will also expand outward, so that the large-sized puncture needle can still be clamped and fixed, making it widely applicable.

[0035] Please see Figure 1-3 The limiting component 4 includes a connecting shaft 41 fixedly connected to the side end of the cover plate 3, a second limiting plate 42 rotatably connected between the inner walls of the connecting shaft 41, a limiting hole 43 opened at the outer end of the second limiting plate 42, a limiting groove 44 opened at the side end of the base 6, the limiting groove 44 and the limiting hole 43 correspond to each other, a limiting bolt 46 is inserted between the inner walls of the limiting hole 43, and the limiting bolt 46 is threadedly connected to the limiting groove 44.

[0036] In order to make the cover plate 3 more stable when clamping the puncture needle 5 during use, in this embodiment, a limiting component 4 is provided between the cover plate 3 and the base 6. When the cover plate 3 is flipped to the upper side of the placement plate 1, the second limiting plate 42 can be rotated to fit against one side of the base 6, and the limiting hole 43 and the limiting groove 44 are made to coincide. The limiting bolt 46 is then inserted into the limiting groove 44 to complete the positioning between the cover plate 3 and the base 6, thereby clamping the puncture needle 5 more stably and preventing deviation and shaking.

[0037] Please see Figure 3 A traction rope 45 is fixedly connected between the limit bolt 46 and the base 6. The traction rope 45 is a spring wire.

[0038] In the process of using this solution, by connecting a traction rope 45 to one end of the limit bolt 46, the limit bolt 46 will not be lost under the traction of the traction rope 45 when the cover plate 3 does not need to be locked in daily life. It can be used immediately and is more convenient to use.

[0039] Please see Figure 1-2 and Figure 4 The pivot between the base 6 and the connecting block 7 is a damped pivot.

[0040] In use, this solution uses a damping pivot between the base 6 and the connecting block 7. This design provides resistance to the rotation of the plate 1 when the operator adjusts its tilt angle, preventing it from rotating freely. Furthermore, during storage, the telescopic rod 8 and the support assembly 9 can be rotated towards the bottom of the plate 1 to make them parallel, facilitating storage when not in use. This design is compact and convenient. Additionally, the damping pivot ensures that the connecting block 7 does not easily rotate after folding.

[0041] Furthermore, two opposite drive switches are installed on the front end of the telescopic rod 8.

[0042] During use, when the operator needs to adjust the tilt angle of the placement plate 1 for the insertion of the puncture needle, the operator can first press the lift switch on the front side of the telescopic rod 8 to extend the telescopic rod 8 upwards, causing the placement plate 1 to change its angle. If the end of the puncture needle to be inserted is too high, the operator can raise the height of the support component 9. After reaching the corresponding position, the operator can then adjust the height of the telescopic rod 8 accordingly so that the angle of the placement plate 1 is just right for the insertion of the puncture needle. If the overall height is adjusted too high during operation, the operator can press the lower switch on the front side to lower the entire plate. The same operation is performed when the plate needs to be retracted until the telescopic rod 8 is fully retracted.

[0043] Please see Figure 4-5 The support assembly 9 includes a sleeve 91 located below the right connecting block 7. A support column 92 is inserted into the upper end of the sleeve 91, and a slider 93 is fixedly connected to the lower end of the support column 92. The slider 93 contacts the inner wall of the sleeve 91. A storage groove 94 is provided on one side of the support column 92, and a positioning groove 95 is provided at the outer end of the sleeve 91. An abutment block 96 is slidably connected between the inner walls of the positioning groove 95. A positioning block 97 is provided between the inner walls of the storage groove 94, and a tension spring 98 is fixedly connected between the positioning block 97 and the side wall of the storage groove 94.

[0044] During use, when the puncture site is higher than the initial limiting plate 2, the operator can pull up the support column 92 to make the storage groove 94 on the side of the support column 92 and the positioning groove 95 at the same level. At this time, the positioning block 97 inside the storage groove 94 is no longer resisted by the inner wall of the sleeve 91, and under the elastic potential energy reset by the tension spring 98, it drives the positioning block 97 to slide between the positioning grooves 95, thereby fixing the overall position of the support column 92. At the same time, the part of the contact block 96 under the resistance of the positioning block 97 also slides out of the outside of the sleeve 91. When the operator needs to lower the position of the support component 9, he can press the contact block 96, which is now partially on the outside, so that the positioning block 97 slides back into the storage groove 94. The support column 92 falls to the bottom of the sleeve 91 without the limiting effect, completing the storage of the support component 9.

[0045] Please see Figure 1 and Figure 4 The suction cup 10 has a crescent groove on the side near the placement plate 1, and the diameter of the crescent groove matches the bottom of the placement plate 1.

[0046] In order to make the whole structure more flat when stored, this embodiment has a crescent groove on one side of the suction cup 10. When the suction cup 10 is rotated to the bottom of the placement plate 1, the crescent groove can fit perfectly with the bottom, so that it can have better flatness after storage.

[0047] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An auxiliary fixation device for a central venous puncture needle, comprising a placement plate (1), characterized in that: The right end of the placement plate (1) is fixedly connected to a first limiting plate (2). The upper end of the placement plate (1) is equipped with a cover plate (3). The cover plate (3) is located to the left of the first limiting plate (2). A puncture needle (5) is provided between the inner walls of the placement plate (1). The lower end of the placement plate (1) is fixedly connected to two symmetrically distributed bases (6). A limiting component (4) is installed between the cover plate (3) and the base (6). The lower end of the base (6) is rotatably connected to a connecting block (7). The lower end of the connecting block (7) on the left is equipped with a telescopic rod (8). The lower end of the connecting block (7) on the right is equipped with a support component (9). The lower ends of the telescopic rod (8) and the support component (9) are both fixedly connected to suction cups (10).

2. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: The side end of the placement plate (1) is fixedly connected to a hinge, and the hinge is rotatably connected to the cover plate (3).

3. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: An airbag pad is fixedly connected to the inner top of the cover plate (3), and the airbag pad is made of rubber material.

4. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: The limiting component (4) includes a connecting shaft (41) fixedly connected to the side end of the cover plate (3), a second limiting plate (42) rotatably connected between the inner walls of the connecting shaft (41), a limiting hole (43) opened at the outer end of the second limiting plate (42), a limiting groove (44) opened at the side end of the base (6), the limiting groove (44) and the limiting hole (43) correspond to each other, a limiting bolt (46) is inserted between the inner walls of the limiting hole (43), and the limiting bolt (46) is threadedly connected to the limiting groove (44).

5. The auxiliary fixation device for a central venous puncture needle according to claim 4, characterized in that: A traction rope (45) is fixedly connected between the limiting bolt (46) and the base (6), and the traction rope (45) is a spring wire.

6. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: The pivot between the base (6) and the connecting block (7) is a damping pivot.

7. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: Two opposite drive switches are installed on the front end of the telescopic rod (8).

8. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: The support assembly (9) includes a sleeve (91) located below the right connecting block (7). A support column (92) is inserted into the upper end of the sleeve (91). A slider (93) is fixedly connected to the lower end of the support column (92). The slider (93) contacts the inner wall of the sleeve (91). A storage groove (94) is provided on one side of the support column (92). A positioning groove (95) is provided at the outer end of the sleeve (91). An abutment block (96) is slidably connected between the inner walls of the positioning groove (95). A positioning block (97) is provided between the inner walls of the storage groove (94). A tension spring (98) is fixedly connected between the positioning block (97) and the side wall of the storage groove (94).

9. The auxiliary fixation device for a central venous puncture needle according to claim 1, characterized in that: The suction cup (10) has a crescent groove on the side near the placement plate (1), and the diameter of the crescent groove matches the bottom of the placement plate (1).

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