Infusion apparatus capable of preventing needle from falling off

Abstract

The utility model relates to the field of medical instruments, in particular to an anti-needle-falling infusion apparatus which comprises a bottle penetrating needle body, a liquid medicine channel is arranged in the bottle penetrating needle body, the liquid medicine channel penetrates through the bottle penetrating needle body, and the bottle penetrating needle body comprises a penetrating section penetrating into an infusion bottle and a connecting section connected with a disposable infusion catheter. A base blocking piece used for limiting the insertion depth of the penetrating section is arranged between the penetrating section and the connecting section, threads assisting the bottle penetrating needle body to be inserted into an infusion bottle rubber plug are arranged on the outer wall of the penetrating section, the rotation starting end of the threads is attached to the base blocking piece, and the height of the threads is smaller than or equal to the height of the infusion bottle rubber plug. According to the anti-needle-falling infusion apparatus, the threads are arranged on the piercing section, when the anti-needle-falling infusion apparatus is used, by rotating the bottle penetrating needle body, on one hand, the bottle penetrating needle body can be inserted into or pulled out of an infusion bottle more conveniently, and on the other hand, the threads are meshed in a rubber plug of the infusion bottle, so that the bottle penetrating needle body can be prevented from falling off from the infusion bottle; and therefore, the medicine bottle is safer in clinical use.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to an anti-needle-dropping infusion device. Background Art

[0002] Intravenous infusion is a treatment method that injects a large amount of sterile solution or medicine into the vein. Intravenous infusion uses the physical principle of liquid static pressure to inject liquid into the body. In clinical practice, intravenous infusion is a common route of drug administration. Disposable infusion sets have been used clinically for many years as a necessary device for intravenous infusion.

[0003] Disposable infusion sets not only bring convenience to clinical treatment and nursing operations, but also prevent cross infection. Moreover, people's economic level can afford it, so they are widely used in medical institutions at all levels.

[0004] During intravenous infusion, the tip of the bottle needle is inserted into the infusion bottle / infusion bag, and the tail of the needle is connected to the infusion catheter to drain the liquid medicine. During intravenous infusion, due to the long infusion time, the movement of the patient during the infusion process or the scratching of the infusion catheter by pedestrians can easily cause the bottle needle to fall off, resulting in waste of liquid medicine and needle contamination. The contaminated bottle needle is inserted back into the infusion bottle or infusion bag, which can easily cause cross infection of the patient. If the bottle needle falls and is not discovered in time, a large amount of air will enter the patient's body, which may cause damage to the patient's body.

[0005] In order to solve the problem that the bottle needle is easy to fall off, the prior art generally adopts a bulged portion in the middle of the needle body to prevent the needle body from falling off from the infusion bottle or infusion bag. However, this type of anti-falling needle body design is not convenient for inserting or removing the infusion bottle or infusion bag.

[0006] Therefore, it is currently necessary to design a bottle piercing needle that can simultaneously solve the problems of the bottle piercing needle used in the prior art being easy to fall off and being inconvenient to insert and remove. Utility Model Content

[0007] The utility model aims to provide an anti-drop-off needle infusion device for the bottle-penetrating needle used in the prior art, in order to solve the problem that the bottle-penetrating needle is easy to drop out and an enlarged part is arranged in the middle part of the needle body, which makes it inconvenient to insert or pull out the bottle-penetrating needle from the infusion bottle or the infusion bag.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A needle-drop-proof infusion device comprises a bottle-penetrating needle body, wherein a medicine liquid channel is arranged in the bottle-penetrating needle body, and the medicine liquid channel runs through the bottle-penetrating needle body, wherein the bottle-penetrating needle body comprises a piercing section which pierces an infusion bottle, and a connecting section which is connected to a disposable infusion catheter, wherein a base baffle for limiting the insertion depth of the piercing section is arranged between the piercing section and the connecting section, and a thread which assists the bottle-penetrating needle body in inserting into a rubber stopper of an infusion bottle is also arranged on the outer wall of the piercing section, wherein the starting end of the thread is in contact with the base baffle, and the height of the thread is less than or equal to the height of the rubber stopper of the infusion bottle.

[0010] By adopting the anti-dropout needle infusion device described in the present invention, the thread is arranged on the piercing section. When in use, by rotating the bottle piercing needle body, on the one hand, the bottle piercing needle body is inserted into / pulled out of the infusion bottle more conveniently. On the other hand, the thread bites into the rubber stopper of the infusion bottle to prevent the bottle piercing needle body from falling off from the infusion bottle, making the present invention safer in clinical use.

[0011] Preferably, the height of the thread is less than the height of the rubber stopper of the infusion bottle. This structural arrangement prevents the thread from excessively damaging the rubber stopper of the infusion bottle, causing leakage of the liquid medicine in the infusion bottle.

[0012] Preferably, the starting end of the thread is separated from the base baffle. With this structural arrangement, the connection between the bottle piercing needle and the infusion bottle is more secure.

[0013] Preferably, the pitch of the thread gradually increases from the needle head side of the piercing section to the base baffle side.

[0014] Preferably, the thread is a triangular thread. With this structural arrangement, the connection between the bottle piercing needle body and the rubber stopper is further tightened.

[0015] Preferably, the thread is a triangular fine pitch thread.

[0016] Preferably, a drainage hole is provided between the threaded end and the needle of the piercing section, and the drainage hole is connected to the liquid medicine channel, so that the liquid medicine at the bottom of the infusion bottle can flow out along the drainage hole. This structural arrangement avoids the waste of liquid medicine.

[0017] Preferably, the channel of the drainage hole is arranged obliquely toward the direction in which the medicine liquid flows. With this structural arrangement, the medicine liquid at the bottom of the infusion bottle can flow out better.

[0018] Preferably, the drainage holes are circular holes arranged around the piercing section, and the drainage holes are arranged in multiple rows, and the centers of the drainage holes in adjacent rows are staggered.

[0019] Preferably, the piercing section and the connecting section are rotatably connected. This structural arrangement improves the practicability of the new device in clinical use.

[0020] Preferably, a water stop ring is further provided between the thread and the base baffle, and the water stop ring surrounds the outer wall of the piercing section to form a cylindrical shape.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0022] 1. The anti-drop-off needle infusion device described in the utility model has the thread arranged on the piercing section. When in use, by rotating the bottle-penetrating needle body, on the one hand, the bottle-penetrating needle body is more convenient to insert / pull out of the infusion bottle. On the other hand, the thread bites into the rubber stopper of the infusion bottle to prevent the bottle-penetrating needle body from falling off from the infusion bottle, making the utility model safer in clinical use;

[0023] 2. In the anti-drop needle infusion device described in the utility model, the height of the thread is set to be smaller than the height of the rubber stopper of the infusion bottle, and the starting end of the thread is separated from the base baffle, so as to avoid the thread from excessively damaging the rubber stopper of the infusion bottle, causing leakage of the liquid medicine in the infusion bottle, and also make the connection between the bottle-piercing needle body and the infusion bottle more tightly;

[0024] 3. In the anti-dropout needle infusion set described in the utility model, the pitch of the thread gradually increases from the needle head side of the insertion section to the base baffle side, the thread is a triangular thread, and further the thread is a triangular fine-pitch thread. With this structural arrangement, on the one hand, it is more convenient to insert the bottle piercing needle body into the rubber stopper, and on the other hand, the bite force between the thread and the rubber stopper is stronger, thereby enhancing the connection tightness between the bottle piercing needle body and the infusion bottle.

[0025] 4. The anti-drop needle infusion device described in the utility model is further provided with a drainage hole between the threaded terminal end and the needle head of the piercing section, the flow hole is connected with the medicine channel, so that the medicine at the bottom of the infusion bottle can flow out along the drainage hole, the channel of the drainage hole is inclined in the direction of the medicine flow, the drainage hole is a circular hole arranged around the piercing section, and the drainage holes are arranged in multiple rows, and the centers of the drainage holes in adjacent rows are staggered. With this structural arrangement, the medicine at the bottom of the infusion bottle can flow out through the drainage hole, avoiding the waste of medicine.

[0026] 5. In the anti-drop-off needle infusion device described in the utility model, the insertion section and the connecting section are rotatably connected, which can prevent medical staff from rotating the disposable infusion tube when rotating the bottle-piercing needle body, thereby improving the practicability of the new device in clinical use.

[0027] 6. The anti-drop needle infusion device described in the utility model is further provided with a water-stop ring between the thread and the base baffle, and the water-stop ring is sealed around the outer wall of the piercing section to form a cylindrical shape. With this structural arrangement, the water-stop ring fills the gap caused by the bottle-penetrating needle body passing through the rubber stopper of the infusion bottle, thereby avoiding leakage of the medicine in the infusion bottle and causing waste, and also avoiding contact between the medicine in the infusion bottle and the external environment, causing contamination of the medicine, thereby improving the safety of the new device in clinical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of an anti-needle-dropping infusion set;

[0029] Figure 2 It is a schematic diagram of an anti-needle-dropping infusion device from another perspective;

[0030] Figure 3 yes Figure 2 Schematic cross-sectional view of AA described in FIG.

[0031] Markings in the figure: 1-bottle needle body, 2-drug solution channel, 3-piercing section, 4-connecting section, 5-base baffle, 6-thread, 7-drainage hole, 8-water stop ring. DETAILED DESCRIPTION

[0032] The utility model is described in detail below in conjunction with the accompanying drawings.

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] Example 1

[0035] like Figures 1 to 3 As shown, an anti-dropping needle infusion device described in the utility model comprises a bottle piercing needle body 1, a medicine liquid channel 2 is arranged in the bottle piercing needle body 1, and the medicine liquid channel 2 runs through the bottle piercing needle body 1, the bottle piercing needle body 1 comprises a piercing section 3 that pierces the infusion bottle, and a connecting section 4 connected to the disposable infusion catheter, a base baffle 5 for limiting the insertion depth of the piercing section 3 is arranged between the piercing section 3 and the connecting section 4, and a thread 6 for assisting the bottle piercing needle body 1 to insert into the rubber stopper of the infusion bottle is also arranged on the outer wall of the piercing section 3, the starting end of the thread 6 is in contact with the base baffle 5, and the height of the thread 6 is less than or equal to the height of the rubber stopper of the infusion bottle.

[0036] The anti-dropout needle infusion device of the present invention is provided with the thread 6 on the piercing section 3. When in use, by rotating the bottle piercing needle body 1, on the one hand, the bottle piercing needle body 1 is inserted into / pulled out of the infusion bottle more conveniently. On the other hand, the thread 6 is engaged in the rubber stopper of the infusion bottle to prevent the bottle piercing needle body 1 from falling off the infusion bottle, making the present invention safer in clinical use. In this embodiment, it should be noted that the starting end of the thread 6 refers to the end of the thread 6 line on the side of the base baffle 5, and the other end formed by the thread 6 line rotating around the piercing section 3 is the terminal end.

[0037] Example 2

[0038] like Figures 1 to 3 As shown, in the anti-needle drop-off infusion device described in the utility model, the height of the thread 6 is smaller than the height of the rubber stopper of the infusion bottle. This structural setting can prevent the thread 6 from excessively damaging the rubber stopper of the infusion bottle and causing leakage of the liquid medicine in the infusion bottle.

[0039] In this embodiment, the inventors consider that although the thread 6 is provided on the piercing section 3, it can make the connection between the bottle piercing needle and the rubber stopper of the infusion bottle more secure and make it more convenient for the bottle piercing needle to insert / remove the infusion bottle, there are still some shortcomings. When the bottle piercing needle body 1 penetrates into and out of the rubber stopper of the infusion bottle, due to the setting of the thread 6, it will repeatedly cut the rubber stopper when rotating, and this process is most destructive to the "penetration port" and "penetration outlet" on the rubber stopper, resulting in reduced sealing of the rubber stopper. In this solution, the inventors set the height of the thread 6 to be less than the height of the rubber stopper of the infusion bottle, which can effectively avoid the damage of the thread 6 to the "penetration outlet" of the rubber stopper, thereby improving the sealing of the bottle piercing needle body 1 after inserting into the rubber stopper and avoiding leakage of the liquid in the infusion bottle. It should be noted that, in the present embodiment, the piercing needle body 1 enters into the infusion bottle by piercing the rubber stopper. According to the direction in which the piercing needle body 1 penetrates the rubber stopper, the side of the piercing needle body 1 that penetrates the rubber stopper and contacts the drug solution is the "piercing outlet", and the side opposite to the "piercing outlet" is the "piercing inlet".

[0040] As a preferred implementation, based on the above-mentioned method, further, the starting end of the thread 6 is separated from the base baffle 5. With this structural setting, the connection between the bottle piercing needle and the infusion bottle is tightened.

[0041] In this embodiment, the inventors consider that the thread 6 will repeatedly cut the rubber stopper when the bottle piercing needle body 1 is rotated and inserted, and the area of ​​the rubber stopper closer to the bottom is more severely damaged, resulting in the rubber stopper being unable to provide sufficient wrapping force to tightly connect the bottle piercing needle body 1 with it. Based on this, in this embodiment, the inventors separate the starting end of the thread 6 from the base baffle 5, so as to prevent the thread 6 from repeatedly cutting the area at the bottom of the rubber stopper, thereby making the connection between the bottle piercing needle and the infusion bottle more secure.

[0042] As a preferred implementation, based on the above-mentioned implementation, further, the pitch of the thread 6 gradually increases from the needle head side of the piercing section 3 to the base baffle 5 side.

[0043] Specifically, in the present embodiment, the pitch of the thread 6 is gradually increased from the needle head side of the piercing section 3 to the side of the base baffle 5. When the bottle piercing needle body 1 is rotated and inserted into the infusion bottle, the thread 6 with a smaller pitch on the side of the piercing section 3 can increase the thrust of the bottle piercing needle body 1, making it easier for the bottle piercing needle body 1 to be inserted into the rubber stopper. The pitch of the thread 6 on the side close to the base baffle 5 is set to be larger. On the one hand, the speed of inserting the bottle piercing needle body 1 into the rubber stopper can be accelerated. On the other hand, it can also prevent the thread 6 from repeatedly damaging the rubber stopper, resulting in a loose connection between the bottle piercing needle body 1 and the infusion bottle.

[0044] As a preferred embodiment, based on the above method, further, the thread 6 is a triangular thread. The thread 6 is a triangular thread with the characteristics of low screw-in torque and high locking performance. With this structural setting, the bottle piercing needle body 1 can be more easily screwed into the rubber stopper, and the high locking force provided by the triangular thread further makes the connection between the bottle piercing needle body 1 and the rubber stopper tighter.

[0045] As a preferred implementation, based on the above-mentioned implementation, further, the thread 6 is a triangular fine-pitch thread.

[0046] In this embodiment, the helix angle of the triangular fine pitch thread is smaller, which is more conducive to the self-locking of the thread 6, and further makes the connection between the bottle needle body 1 and the rubber stopper tighter. At the same time, the pitch of the triangular fine pitch thread is relatively small. On the same length of the thread 6, the number of threads screwed in is more, which can reduce fluid leakage and avoid leakage of the liquid in the infusion bottle after the bottle needle body 1 is inserted, which can improve the safety of the new type in clinical use.

[0047] Example 3

[0048] like Figures 1 to 3As shown, the anti-drop needle infusion device of the utility model is provided with a drainage hole 7 between the terminal end of the thread 6 and the needle of the piercing section 3, and the drainage hole 7 is connected with the liquid medicine channel 2, so that the liquid medicine at the bottom of the infusion bottle can flow out along the drainage hole 7. With this structural setting, the waste of liquid medicine is avoided.

[0049] In this embodiment, the inventors have considered that the liquid inlet of most of the bottle-piercing needles currently used in clinical practice is set too high, and there will be residual liquid at the bottom of the infusion bottle at the end of the infusion, causing waste. Therefore, in this solution, the inventors set the drainage hole 7 between the terminal end of the thread 6 and the needle head of the piercing section 3. The drainage hole 7 is connected to the liquid medicine channel 2, so that the liquid medicine at the bottom of the infusion bottle can flow out along the drainage hole 7, avoiding waste.

[0050] As a preferred embodiment, based on the above method, further, the channel of the drainage hole 7 is inclined in the direction of the flow of the liquid medicine. With this structural setting, the liquid medicine at the bottom of the infusion bottle can flow out better.

[0051] As a preferred embodiment, based on the above method, further, the drainage holes 7 are circular holes arranged around the piercing section 3, and the drainage holes 7 are arranged in multiple rows, and the centers of the drainage holes 7 in adjacent rows are staggered.

[0052] In this embodiment, the inventor arranges the drainage holes 7 in multiple rows, which can ensure the drainage amount of the bottle piercing needle body 1 at the end of the infusion, and prevent the mixture of the drug solution and air from flowing into the infusion tube, causing harm to the patient. The centers of the drainage holes 7 in adjacent rows are staggered. On the one hand, it can prevent the adjacent drainage holes 7 from interfering with each other during drainage, causing poor drainage. On the other hand, the multiple rows of drainage holes 7 with staggered centers disperse the relatively concentrated stress in this area, and prevent the bottle piercing needle body 1 from being deformed or broken when it is screwed into the infusion bottle.

[0053] Example 4

[0054] like Figures 1 to 3 As shown, in the anti-drop-off needle infusion device of the utility model, the piercing section 3 is rotatably connected to the connecting section 4. This structural arrangement improves the practicability of the utility model in clinical use.

[0055] In this embodiment, the inventor considers that the bottle piercing needle body 1 in this scheme is inserted into the infusion bottle in a rotating manner, and the disposable infusion tube will be driven to rotate during the rotation of the bottle piercing needle body 1, which will bring inconvenience to the operation of medical staff. Moreover, if the patient needs to continuously infuse multiple bottles of liquid medicine, the new type will not be able to be used. Based on the above considerations, in this scheme, the inventor sets a rotatable connection between the piercing section 3 and the connecting section 4, so that the medical staff is prevented from driving the disposable infusion tube to rotate when rotating the bottle piercing needle body 1, thereby improving the practicality of the new type in clinical use.

[0056] Example 5

[0057] like Figures 1 to 3 As shown, in the anti-drop-off needle infusion device of the utility model, a water stop ring 8 is further arranged between the thread 6 and the base baffle 5, and the water stop ring 8 is closed around the outer wall of the piercing section 3 to form a cylindrical shape. This structural arrangement further improves the practicability of the utility model in clinical practice.

[0058] Specifically, in the present embodiment, the inventors consider that in the above-mentioned embodiment, the starting end of the thread 6 is separated from the base baffle 5, so as to avoid the thread 6 from repeatedly cutting the bottom area of ​​the rubber stopper, so that the connection between the piercing needle and the infusion bottle is tighter. However, there is still a disadvantage. When the thread 6 passes through the bottom area of ​​the rubber stopper, its own resilience will still be destroyed, and the rubber stopper cannot wrap the piercing needle body 1 well. If leakage occurs in the upper area of ​​the rubber stopper, the lower area of ​​the rubber stopper cannot block the leaked medicine. Therefore, in the present embodiment, the inventors further provide a water stop ring 8 between the thread 6 and the base baffle 5. The water stop ring 8 enlarges the diameter of the piercing section 3, thereby filling the resilience lost by the rubber stopper due to the damage of the thread 6, avoiding the leakage of the medicine from the gap formed by the rubber stopper and the piercing section 3, and improving the practicality of the present invention in clinical practice.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-needle infusion set, characterized in that: The invention comprises a bottle piercing needle body (1), wherein a liquid medicine channel (2) is arranged inside the bottle piercing needle body (1), wherein the liquid medicine channel (2) passes through the bottle piercing needle body (1), wherein the bottle piercing needle body (1) comprises a piercing section (3) for piercing into an infusion bottle, and a connecting section (4) connected to a disposable infusion catheter, wherein a base baffle (5) for limiting the insertion depth of the piercing section (3) is arranged between the piercing section (3) and the connecting section (4), and a thread (6) for assisting the bottle piercing needle body (1) to be inserted into a rubber stopper of an infusion bottle is also arranged on the outer wall of the piercing section (3), wherein the starting end of the thread (6) is in contact with the base baffle (5), and the height of the thread (6) is less than or equal to the height of the rubber stopper of the infusion bottle.

2. The anti-needle infusion set according to claim 1, characterized in that: The height of the thread (6) is less than the height of the rubber stopper of the infusion bottle.

3. The anti-needle infusion set according to claim 1, characterized in that: The starting end of the thread (6) is arranged to separate the base baffle (5).

4. The anti-needle infusion set according to any one of claims 1 to 3, characterized in that: The pitch of the thread (6) gradually increases from the needle head side of the piercing section (3) to the base baffle (5) side.

5. The anti-needle infusion set according to claim 4, characterized in that: The thread (6) is a triangular thread.

6. The anti-needle infusion set according to claim 5, characterized in that: The thread (6) is a triangular fine pitch thread.

7. The anti-needle infusion set according to claim 1, characterized in that: A drainage hole (7) is also provided between the terminal end of the thread (6) and the needle of the piercing section (3); the drainage hole (7) is connected to the drug liquid channel (2), so that the drug liquid at the bottom of the infusion bottle can flow out along the drainage hole (7); the channel of the drainage hole (7) is arranged to be inclined in the direction of drug liquid flow.

8. The anti-needle infusion set according to claim 7, characterized in that: The drainage holes (7) are circular holes arranged around the piercing section (3), and the drainage holes (7) are arranged in multiple rows, with the centers of the drainage holes (7) in adjacent rows being arranged in a staggered manner.

9. The anti-needle infusion set according to claim 1, characterized in that: The piercing section (3) and the connecting section (4) are rotatably connected.

10. The anti-drop needle infusion set according to claim 3, characterized in that: A water stop ring (8) is also provided between the thread (6) and the base baffle (5), and the water stop ring (8) surrounds the outer wall of the piercing section (3) to form a cylindrical shape.

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