Venous catheterization needle convenient to operate by one hand

Abstract

The utility model provides a venous catheterization needle convenient to operate by one hand, which is applied to the technical field of venous indwelling needles and is characterized by comprising an indwelling needle seat and a puncture needle seat assembled on the indwelling needle seat, the indwelling needle seat comprises a puncture guide tube, an indwelling soft needle fixed to one end of the puncture guide tube, a liquid inlet tube fixed to one side of the puncture guide tube and communicated with the puncture guide tube, and an isolation plug filled in the puncture guide tube. The liquid inlet tube is connected with a Y-shaped liquid feeding tube. The puncture needle seat comprises a fixed base mounted at the bottom of the puncture guide tube, a puncture needle fixed on the fixed base and inserted in the indwelling soft needle, and a needle holding handle fixed on the fixed base; the liquid inlet pipe and the needle holding handle are located on the two sides of the puncture guide pipe respectively. A shifting piece is rotationally arranged on the puncture guide pipe, and the rotating angle between the shifting piece and the puncture guide pipe is smaller than 90 degrees; the utility model has the technical effects that the single-hand operation of medical personnel is facilitated, the stability of the single-hand operation is improved, and the puncture success rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of venous indwelling needles, in particular to a venous catheter needle convenient for single-handed operation. Background Art

[0002] In midsummer, soldiers in field operations are extremely prone to heatstroke and dehydration. The current treatment plan for heatstroke soldiers is as follows: quickly infusing fluids into the soldiers, and then soaking the infusing soldiers in water or wrapping them with ice cloth to achieve the effect of conductive cooling, so as to ensure the smoothness of the infusion passage; currently, in order to quickly replenish fluids when the venous filling is insufficient, medical staff use venous indwelling needles to puncture and infuse fluids for soldiers at the median cubital vein, and then use a fixation patch to surround and wrap the elbow part where the venous catheter is placed; the fixation patch includes a self-adhesive elastic bandage and a waterproof patch fixed on the self-adhesive elastic bandage; the self-adhesive elastic bandage plays a role in fixing the venous indwelling needle, and the waterproof patch plays a waterproof effect.

[0003] Currently, a Chinese invention with the publication number CN104922759B discloses an indwelling needle, including an indwelling soft needle, an indwelling needle seat, an extension tube seat, an extension hose connected between the indwelling needle seat and the extension tube seat, and a stop clamp arranged on the extension hose. At least one elastic pressing device with a large clamping area and capable of forming a continuous positive pressure on the extension hose is further arranged at the front parts of the upper and lower contact heads of the clamping part between the clamping piece and the clamping seat of the stop clamp.

[0004] Clinically, when medical staff puncture a patient, they need to fix the patient's arm with the left hand and then operate the indwelling needle with the right hand single-handedly; however, in the case of field operations, the number of heatstroke soldiers is large at the same time, the rescue task of medical staff is heavy, and the rescue time given to medical staff in the combat environment is limited, and the existing venous indwelling needles are not convenient for medical staff to operate single-handedly, resulting in unstable single-handed operation of medical staff and low puncture success rate. Content of the Utility Model

[0005] The purpose of the utility model is to provide a venous catheter needle convenient for single-handed operation, and its advantage is that it is convenient for medical staff to operate single-handedly, thereby improving the stability of single-handed operation and the puncture success rate.

[0006] To achieve the above purpose and other related purposes, the utility model provides the following technical solutions:

[0007] A venous catheter needle convenient for single-handed operation includes an indwelling needle seat and a puncture needle seat assembled on the indwelling needle seat; the indwelling needle seat includes a puncture guiding tube, an indwelling soft needle fixed at one end of the puncture guiding tube, a liquid inlet tube fixed on one side of the puncture guiding tube and communicated with the puncture guiding tube, and an isolation plug stuffed in the puncture guiding tube, and the liquid inlet tube is connected with a Y-shaped liquid supply tube;

[0008] The puncture needle holder includes a fixed base installed at the bottom of the puncture guiding tube, a puncture needle fixed on the fixed base and inserted into the indwelling soft needle, and a needle holder handle fixed on the fixed base; the liquid inlet tube and the needle holder handle are respectively located on both sides of the puncture guiding tube;

[0009] A dial is arranged on the puncture guiding tube, the liquid inlet tube is located on the left side of the dial, and the needle holding handle is located on the right side of the dial; the dial is rotatably connected to the puncture guiding tube, and the rotation angle between the dial and the puncture guiding tube is less than 90°.

[0010] With the above technical solution, the medical staff holds the patient's arm with the left hand and operates the venous catheter needle with one hand; the dial is rotatably connected to the puncture guiding tube, which is convenient for lifting the dial. The index finger presses against the dial, and the dial serves as a support plate to support the index finger; the liquid inlet tube is located on the left side of the dial, and the needle holding handle is located on the right side of the dial, which is convenient for the middle finger and thumb of the right hand to pinch the needle holding handle and push the venous catheter needle forward. After the puncture needle punctures the skin, the venous catheter needle is continuously pushed forward until the indwelling soft needle and the puncture needle enter the vein together; then the index finger presses against the dial and does not move, and the middle finger and thumb pinch the needle holding handle and move backward, so that the puncture needle holder is withdrawn from the indwelling needle holder; it is convenient for the medical staff to operate with one hand and improves the stability of one-handed operation.

[0011] In an embodiment of the present invention, an installation groove is provided on the outer side wall of the puncture guiding tube, and the dial is rotatably connected in the installation groove.

[0012] With the above technical solution, the dial can be installed in the installation groove in the non-use state, avoiding the dial protruding from the side wall of the puncture guiding tube and preventing the situation of insecure fixation when using tape for subsequent fixation.

[0013] In an embodiment of the present invention, a finger position connected to the installation groove is provided on the puncture guiding tube.

[0014] With the above technical solution, it is convenient to lift the dial out of the installation groove.

[0015] In an embodiment of the present invention, the dial is an arc-shaped plate.

[0016] With the above technical solution, the dial can be installed in a manner that fits the side wall of the puncture guiding tube.

[0017] In an embodiment of the present invention, a groove is provided on the side wall of the installation groove close to the indwelling soft needle side;

[0018] A movable block inserted into the groove is integrally formed on the dial;

[0019] A first moving gap is provided between the movable block and the groove, and between the paddle and the mounting groove.

[0020] Through the above technical solution, the movable block is inserted into the groove, thereby connecting the paddle to the puncture guiding tube; since a first moving gap is provided between the movable block and the groove, and between the paddle and the mounting groove, the first moving gap provides a rotating space for the paddle to be lifted and limits the rotation angle of the paddle on the puncture guiding tube; when performing the needle withdrawal operation, it is convenient for the index finger to press against the paddle, and the thumb and middle finger pinch the needle holding handle and move backward, thereby facilitating the withdrawal of the puncture needle seat from the indwelling needle seat; it is convenient for medical staff to operate with one hand and improves the stability of one-handed operation.

[0021] In an embodiment of the present invention, movable grooves are provided on the inner walls of both sides of the mounting groove;

[0022] Movable shafts inserted into the movable grooves are integrally formed on both sides of the paddle;

[0023] A second moving gap is provided between the paddle and the mounting groove.

[0024] Through the above technical solution, the movable shafts are inserted into the movable grooves, thereby connecting the paddle to the puncture guiding tube; a second moving gap is provided between the paddle and the mounting groove, and the second moving gap provides a rotating space for the paddle to be lifted and limits the rotation angle of the paddle on the puncture guiding tube; when performing the needle withdrawal operation, it is convenient for the index finger to press against the paddle, and the thumb and middle finger pinch the needle holding handle and move backward, thereby facilitating the withdrawal of the puncture needle seat from the indwelling needle seat; it is convenient for medical staff to operate with one hand and improves the stability of one-handed operation.

[0025] In an embodiment of the present invention, the diameter of the indwelling soft needle is between 0.85 mm and 0.95 mm, and the length of the indwelling soft needle is between 18 mm and 20 mm.

[0026] Through the above technical solution, the short length of the indwelling soft needle facilitates catheterization, and the larger diameter of the indwelling soft needle can achieve rapid fluid infusion.

[0027] As described above, a venous catheterization needle of the present invention that is convenient for one-handed operation has the following beneficial effects:

[0028] The medical staff holds the patient's arm with the left hand and operates the venous catheter needle with the right hand alone. The dial is rotatably connected to the puncture guiding tube, facilitating the lifting of the dial. The index finger presses against the dial. The liquid inlet tube is located on the left side of the dial, and the needle holding handle is located on the right side of the dial, facilitating the middle finger and thumb of the right hand to pinch the needle holding handle and push the venous catheter needle forward. After the puncture needle punctures the skin, the venous catheter needle is continuously pushed forward until the indwelling soft needle and the puncture needle enter the vein together. Then, the index finger keeps pressing against the dial, and the middle finger and thumb pinch the needle holding handle and move backward, thereby withdrawing the puncture needle seat from the indwelling needle seat. This facilitates the single-handed operation of the medical staff and improves the stability of the single-handed operation. Brief Description of the Drawings

[0029] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present utility model;

[0030] Figure 2 is the structural schematic diagram of the needle withdrawal process of Embodiment 1 of the present utility model;

[0031] Figure 3 is the overall structural sectional view of Embodiment 1 of the present utility model;

[0032] Figure 4 is Figure 3 the enlarged schematic diagram of Part A in

[0033] Figure 5 is the structural schematic diagram of the dial of Embodiment 1 of the present utility model;

[0034] Figure 6 is the schematic diagram of the cooperation relationship between the dial and the installation groove of Embodiment 2 of the present utility model;

[0035] Figure 7 is the structural schematic diagram of the installation groove of Embodiment 2 of the present utility model;

[0036] Figure 8 is the structural schematic diagram of the dial of Embodiment 2 of the present utility model.

[0037] Reference Signs: 1. Indwelling needle seat; 11. Puncture guiding tube; 12. Indwelling soft needle; 13. Liquid inlet tube; 14. Isolation plug; 15. Y-shaped liquid supply tube; 16. Installation groove; 17. Finger position; 18. Liquid storage cavity; 2. Puncture needle seat; 21. Fixed base; 22. Puncture needle; 23. Needle holding handle; 3. Dial; 31. Groove; 32. Movable block; 33. First movable gap; 301. Movable groove; 302. Movable shaft; 303. Second movable gap. Detailed Embodiments

[0038] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification.

[0039] Please refer to Figures 1 to 8 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that the present utility model can implement.

[0040] Embodiment 1

[0041] Please refer to Figures 1 to 5 , the present utility model provides a venous catheter needle convenient for single-handed operation, including a indwelling needle seat 1 and a puncture needle seat 2 assembled on the indwelling needle seat 1; the indwelling needle seat 1 includes a puncture guiding tube 11, an indwelling soft needle 12 fixed at one end of the puncture guiding tube 11, a liquid inlet tube 13 integrally formed on one side of the puncture guiding tube 11 and communicating with the puncture guiding tube 11, and a separating plug 14 stuffed in the puncture guiding tube 11. The separating plug 14 is stuffed in the puncture guiding tube 11 on the side away from the indwelling soft needle 12 and forms a liquid storage cavity 18 in the puncture guiding tube 11. The indwelling soft needle 12 and the liquid inlet tube 13 are both communicated with the liquid outlet cavity. The other end of the liquid inlet tube 13 is connected with a Y-shaped liquid supply tube 15, and the Y-shaped liquid supply tube 15 can realize dual-channel liquid supply; no stopcock is provided on the catheter connecting the Y-shaped liquid supply tube 15 and the liquid inlet tube 13 in this embodiment;

[0042] In this embodiment, the diameter of the indwelling soft needle 12 is between 0.85 mm and 0.95 mm, and the length of the indwelling soft needle 12 is between 18 mm and 20 mm; preferably, the diameter of the indwelling soft needle 12 is 0.9 mm, and the length of the indwelling soft needle 12 is preferably 19 mm; profuse sweating causes a decrease in the patient's venous fluid volume, which is likely to cause difficulty in catheterization; since the median cubital vein is convenient for catheterization; however, this part is close to the elbow joint. If the cannula is too long, the activity of the elbow joint after indwelling will drive the cannula to move, increasing the irritation to the vascular intima and easily inducing phlebitis and forming thrombus. Therefore, this part is more suitable for a short-sized cannula needle with a length of 19 mm; the indwelling soft needle with a diameter of 0.9 mm has a larger diameter and can achieve rapid fluid replacement for dehydrated soldiers.

[0043] Please refer to Figures 1 to 5, the puncture needle holder 2 includes a fixed base 21 installed at the bottom of the puncture guiding tube 11, a puncture needle 22 fixed on the fixed base 21, and a needle holding handle 23 integrally formed on the fixed base 21; wherein the puncture needle 22 is fixed at the axial center position of the fixed base 21. When the fixed base 21 is installed at the bottom of the puncture guiding tube 11, the puncture needle 22 passes through the isolation plug 14 and is inserted into the indwelling soft needle 12; the needle holding handle 23 in this embodiment is in a butterfly shape, and anti-slip bumps are provided on the surface of the needle holding handle 23; when the fixed base 21 is installed at the bottom of the puncture guiding tube 11, the liquid inlet tube 13 and the needle holding handle are located on both sides of the puncture guiding tube 11 respectively;

[0044] A dial 3 is provided on the side wall of the puncture guiding tube 11; since the right hand of the vast majority of people is the dominant hand, the liquid inlet tube 13 is located on the left side of the dial 3 and the needle holding handle is located on the right side of the dial 3, which is more convenient for medical staff to perform single-handed needle placement operations with the right hand; the dial 3 is rotatably connected to the puncture guiding tube 11, and the included angle between the dial 3 and the puncture guiding tube 11 is α, where 0° ≤ α < 90°; it is convenient to lift the dial 3, the index finger of the right hand presses against the dial 3, the middle finger and the thumb pinch the needle holding handle, and the venous catheter needle is pushed forward. After the puncture needle 22 punctures the skin, the venous catheter needle is continuously pushed forward until the indwelling soft needle 12 and the puncture needle 22 enter the vein together; then the index finger presses against the dial 3, the middle finger and the thumb pinch the needle holding handle and move backward, so that the puncture needle holder 2 is withdrawn from the indwelling needle holder 1.

[0045] Please refer to Figures 1 to 5 , an installation groove 16 is provided on the outer side wall of the puncture guiding tube 11 located outside the isolation plug 14, and the dial 3 is rotatably connected in the installation groove 16. Since the arc groove is arranged along the arc side wall of the puncture guiding tube 11, the installation groove 16 is of an arc structure; therefore, the dial 3 in this embodiment is of an arc structure, which can make the dial 3 fit the side wall of the puncture guiding tube 11 for installation, thus avoiding the dial 3 protruding from the side wall of the puncture guiding tube 11; a finger position 17 connected to the installation groove 16 is provided on the puncture guiding tube 11 on the side away from the indwelling soft needle 12, and the finger position 17 facilitates lifting the dial 3 out of the installation groove 16.

[0046] Please refer to Figures 1 to 5, a groove 31 is provided on the side wall of the installation groove 16 close to the side of the indwelling soft needle 12; a movable block 32 inserted into the groove 31 is integrally formed on the paddle 3; the cross section of the movable block 32 in this embodiment is circular; a first movable gap 33 is provided between the movable block 32 and the groove 31, and between the paddle 3 and the installation groove 16; the movable block 32 is inserted into the groove 31, thereby connecting the paddle 3 and the puncture guiding tube 11 together; since a first movable gap 33 is provided between the movable block 32 and the groove 31, and between the paddle 3 and the installation groove 16, the first movable gap 33 provides a rotation space for the paddle 3 to be lifted and limits the rotation angle of the paddle 3 on the puncture guiding tube 11; the rotation angle of the paddle 3 is between 45° and 80°, and preferably the rotation angle of the paddle 3 is 60° in this embodiment, which is convenient for the operator to place the index finger between the paddle 3 and the puncture guiding tube 11; during the needle withdrawal operation, it is convenient for the index finger to press against the paddle 3, and the paddle 3 plays a supporting role for the index finger, and the thumb and middle finger pinch the needle holding handle and move backward, thereby facilitating the withdrawal of the puncture needle seat 2 from the indwelling needle seat 1; it is convenient for medical staff to operate with one hand and improves the stability of one-handed operation.

[0047] Embodiment 2

[0048] Please refer to Figure 6 、 Figure 7 and Figure 8 , movable grooves 301 are provided on both inner walls of the installation groove 16; movable shafts 302 inserted into the movable grooves 301 are integrally formed on both sides of the paddle 3; a second movable gap 303 is provided between the paddle 3 and the installation groove 16.

[0049] The movable shaft 302 is inserted into the movable groove 301, thereby connecting the paddle 3 and the puncture guiding tube 11 together; a second movable gap 303 is provided between the paddle 3 and the installation groove 16, and the second movable gap 303 provides a rotation space for the paddle 3 to be lifted and limits the rotation angle of the paddle 3 on the puncture guiding tube 11; in this embodiment, the rotation angle of the paddle 3 is between 45° and 80°; preferably the rotation angle of the paddle 3 is 60° in this embodiment, which is convenient for the operator to place the index finger between the paddle 3 and the puncture guiding tube 11, and during the needle withdrawal operation, it is convenient for the index finger to press against the paddle 3, and the paddle 3 plays a supporting role for the index finger, and the thumb and middle finger pinch the needle holding handle and move backward, thereby facilitating the withdrawal of the puncture needle seat 2 from the indwelling needle seat 1; it is convenient for medical staff to operate with one hand and improves the stability of one-handed operation.

[0050] Brief description of the usage process: First, lift the paddle 3 out of the installation groove 16. Then, the medical staff holds the patient's arm with the left hand, presses the index finger of the right hand against the paddle 3, pinches the needle holder 23 with the middle finger and thumb, and simultaneously moves the index finger, thumb, and middle finger forward to push the venous catheter forward. When the puncture needle 22 punctures the skin, continue to push the venous catheter forward until the indwelling soft needle 12 and the puncture needle 22 enter the vein together. Then, keep the index finger pressing against the paddle 3 still, pinch the needle handle with the middle finger and thumb and move backward, so that the puncture needle seat 2 is forced to withdraw from the indwelling needle seat 1.

[0051] After the puncture needle seat 2 withdraws from the indwelling needle seat 1, cover the lifted paddle 3 in the installation groove 16, so that the paddle 3 can be attached to the side wall of the puncture guiding tube 11 for installation. Subsequently, use medical tape to fix the paddle 3 on the puncture guiding tube 11 and paste and fix the venous catheter on the arm.

[0052] In summary, the utility model is convenient for the medical staff to operate with one hand, improves the stability of one-handed operation, and improves the puncture success rate. Therefore, the utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0053] The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A venous catheter needle convenient for single-handed operation, comprising an indwelling needle seat (1) and a puncture needle seat (2) assembled on the indwelling needle seat (1); the indwelling needle seat (1) includes a puncture guiding tube (11), an indwelling soft needle (12) fixed at one end of the puncture guiding tube (11), a liquid inlet tube (13) fixed on one side of the puncture guiding tube (11) and communicating with the puncture guiding tube (11), and a separation plug (14) stuffed in the puncture guiding tube (11), and the liquid inlet tube (13) is connected with a Y-shaped liquid supply tube (15). The puncture needle seat (2) includes a fixed base (21) installed at the bottom of the puncture guiding tube (11), a puncture needle (22) fixed on the fixed base (21) and inserted into the indwelling soft needle (12), and a needle holding handle (23) fixed on the fixed base (21); the liquid inlet tube (13) and the needle holding handle (23) are respectively located on both sides of the puncture guiding tube (11). It is characterized in that A dial (3) is arranged on the puncture guiding tube (11), the liquid inlet tube (13) is located on the left side of the dial (3), and the needle holding handle is located on the right side of the dial (3); the dial (3) is rotatably connected to the puncture guiding tube (11), and the rotation angle between the dial (3) and the puncture guiding tube (11) is less than 90°.

2. The single-handed operation facilitated venous catheter according to claim 1, wherein: An installation groove (16) is arranged on the outer wall of the puncture guiding tube (11), and the dial (3) is rotatably connected in the installation groove (16).

3. The single-handed operable intravenous catheter needle according to claim 2, wherein: A finger position (17) connected to the installation groove (16) is arranged on the puncture guiding tube (11).

4. The single-handed operation facilitated venous catheter according to claim 2, wherein: The dial (3) is an arc-shaped plate.

5. The single-handed operable venous catheterization needle according to claim 4, wherein: A groove (31) is arranged on the side wall of the installation groove (16) close to the indwelling soft needle (12). A movable block (32) integrally formed on the dial (3) is inserted into the groove (31). A first movable gap (33) is arranged between the movable block (32) and the groove (31) and between the dial (3) and the installation groove (16).

6. The single-handed operation facilitating venous catheter needle according to claim 4, wherein: Movable grooves (301) are arranged on the inner walls of both sides of the installation groove (16). Movable shafts (302) integrally formed on both sides of the dial (3) are inserted into the movable grooves (301). A second movable gap (303) is arranged between the dial (3) and the installation groove (16).

7. The single-handed operation facilitating venous catheter needle according to claim 1, wherein: The diameter of the indwelling soft needle (12) is between 0.85 mm and 0.95 mm, and the length of the indwelling soft needle (12) is between 18 mm and 20 mm.

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