TWI764325B - Infusion tube structure - Google Patents

Abstract

An infusion tube structure, the infusion tube includes a non-return device, a flow rate adjustment device, and a dosing valve, the non-return device has a main pipe, the main pipe has a valve seat, and the valve seat has a plurality of through holes And a valve plate, which makes the valve plate elastically close the through hole, one side of the main pipe is connected with a pipe for externally connecting the empty needle, the flow rate adjusting device is fixed on the infusion tube with a box body, and the box body is relatively opposite to the infusion tube. The two sides of the tube are provided with two guide grooves, and the distance between the two guide grooves is gradually reduced from large to small, the two guide grooves are provided with two movable rollers, and the box body is provided with a push button, the push button is used for To push the two rollers to move along the two guide grooves. 1. The valve plate can prevent blood return, and the branch tube can be connected to an empty needle to check the blood return to confirm the position of the venous indwelling needle; 2. The traditional adjustment speed drop tube clamp is changed to a push button design to achieve the purpose of convenient and precise speed regulation; 3. Improved traditional dosing valve: It is designed in a push-through way to reduce the gas entering the dosing valve and solve the phenomenon of exhausting time-consuming.

Description

Infusion tube structure

The present invention relates to an infusion tube, in particular, it is an infusion tube structure comprising a non-return device, a flow rate adjusting device, and a dosing valve.

Intravenous injection is a medical method and is often used to treat patients. According to statistics, about 80% of patients will receive this kind of treatment during hospitalization, that is, the use of intravenous infusion cannula to provide infusion (commonly known as drip. ), that is, injecting liquid substances such as blood, medicinal solution, and nutrient solution directly into the vein. Hemodynamic changes are needed to treat diseases and maintain physiological functions.

Before the intravenous infusion cannula is used, the cannula is filled with air, so the nursing staff needs to flow the infusion from the upper end of the infusion cannula to the lower end so that the infusion can fill the cannula and remove the air, which is called "exhaust". The infusion will not be connected to the patient end until it is complete. If the exhaust is not complete, the gas entering the patient's body will cause gas embolism and endanger the life of the patient. During infusion therapy, patients and their families often need to pay attention to the situation of infusion infusion, which interferes with work and rest or sleep. Nursing staff also need to observe the infusion rate, blockage, unsmoothness or infiltration, phlebitis, hematoma and other side effects at any time.

Venous return is one of the most common care problems for patients receiving intravenous fluid in clinical practice. It is caused by changes in height and pressure caused by patients getting out of bed, raising their arms, or other actions (eg, exertion). 100% of the nurses have dealt with the case of venous blood return. When the venous blood is returned, the nurse should immediately use normal saline (0.9% normal saline) and heparin for flushing to prevent coagulation; the act of flushing In addition to causing the patient's sense of panic and pain, it may increase the migration of small blood clots to other vital organs to form thrombus, leading to greater threats such as cardiovascular blockage or stroke.

In case of venous return, if the nursing staff is not informed immediately or the nursing staff cannot handle it immediately due to the busy nursing work, it will lead to blood clots and then blockage (cloting). intravenous tubing set). Intravenous infusion is an invasive treatment. In order to reduce the risk of infection and the safety of patients, the hospital routinely replaces the injection site every three days. Flushing or re-replacement increases the patient's pain, as well as nursing hours, consumables, and medical costs.

Intravenous tubing set for clinical use provides infusion, and its structure includes: injection end connector, infusion tube, dosing valve, adjusting drip tube clamp, Maffei titration chamber, and drainage end needle.

At present, the commonly used intravenous infusion cannula has the following problems:

1. Lack of anti-return structure, if the infusion is empty or the limb height or pressure changes, it will cause blood to return in the infusion cannula, resulting in the probability of re-placement of the venous indwelling needle, causing the patient's pain, increase in nursing hours and medical treatment. waste of cost.

2. Adjusting the speed drop tube clamp is designed in the way of hub, resulting in time-consuming and less precise flow rate adjustment.

3. It is easy to store air inside the dosing valve, resulting in time-consuming exhaust.

In order to solve the above problems, and to develop a lightweight, simple, low-cost structural technology that is not similar to other patents and commercial products, and to confirm the relationship between venous blood return, air embolism, local phlebitis and other symptoms and the intravenous infusion cannula In terms of relevance, the inventors conducted a literature search on the group, probability, category, derivative expenditure, and shock stress of their symptoms to establish the importance of the problem.

The inventor has searched domestic and foreign patents and products, and there is no relevant patent design. Most of these patents are based on the application of automatic electronic or infrared sensing principle in drip residual detection, which is different from the design purpose and concept of this product. Among them, Taiwan Patent No. M509047 "Infusion non-return device", although the patent has a non-return function, it adopts the hydrodynamic design of the single-tube valve body, which cannot check whether the venous indwelling needle is unblocked.

Please refer to the appendix, which compares the advantages and disadvantages of the present invention with the traditional needle-holding intravenous infusion cannula, needle-free intravenous infusion cannula, and infusion tube structure.

Therefore, the structure of the existing infusion cannula is not ideal, and there is a need for improvement.

The reason is, the inventor of the present invention is based on the concept of continuous research and innovation of products, based on years of practical experience in product design and development, as well as active and dedicated research and development thinking, through countless actual tests and experiments, the invention has come into being.

The purpose of the present invention is to provide an infusion cannula which can prevent blood return, can check the blood return to confirm the position of the venous indwelling needle, and can easily and precisely adjust the flow rate.

In order to achieve the above-mentioned purpose, the present invention includes a check device and a flow rate adjustment device, wherein the check device is arranged at the injection end of the infusion tube, and the check device has a main pipe for one end to communicate with the injection end and The other end is connected to the needle, the main pipe has a valve seat, the valve seat has a plurality of through holes, and a valve plate is arranged between the through holes, the valve plate is selected from elastic materials, so that the valve plate The through hole is elastically closed, and one side of the main pipe is connected to a pipe for externally connecting the empty needle; the flow rate adjustment device is close to a cylinder for containing the liquid medicine, and the flow rate adjustment device is fixed to the infusion tube with a box body. The box body is provided with two guide grooves on two sides opposite to the infusion tube, and the distance between the two guide grooves is gradually reduced from large to small. The two guide grooves are provided with two movable rollers, and the box body is provided with a The push button is used to push the two rollers to move along the two guide grooves, and to enable the two rollers to be relatively clamped or away from the infusion tube.

The valve plate can prevent blood return, and the branch tube can be connected to an empty needle to check the blood return to confirm the position of the venous indwelling needle.

The traditional adjustment speed drop tube clamp is changed to a push button design to achieve the purpose of convenient and precise speed regulation.

The following is only described in detail by way of specific embodiments and accompanying drawings.

Please refer to FIG. 1 to FIG. 4 , the infusion tube 1 of the present invention includes a backflow check device 10 and a flow rate adjustment device 20 . It will be explained in detail below:

The non-return device 10 is disposed on the injection end 101 of the infusion tube 1 , and the non-return device 10 has a main pipe 11 for connecting one end to the injection end 101 and the other end to connect the needle 12 , and the main pipe 11 has a valve inside The plate seat 13 has a plurality of through holes 131, and a valve plate 14 is arranged between the through holes 131, the valve plate 14 is selected from elastic materials, so that the valve plate 14 elastically closes the through holes 131 , one side of the main pipe 11 is connected to a branch pipe 15 for externally connecting the empty needle 2 (please refer to Fig. 7).

In one embodiment, the upper side of the main pipe 11 is provided with a number of spring hooks 111, the number of spring hooks 111 is engaged with a flange 161 provided on a connecting piece 16, and a rubber ring 17 is provided on one side of the flange 161. 16. The rubber ring 17 is pressed against the valve seat 13 and the inner wall of the main pipe 11, so that the anti-return device 10 has the effect of sealing and leakage prevention, and the connecting piece 16 is sleeved on the injection end 101.

In one embodiment, a sealing post 151 is inserted into the branch pipe 15 to seal and block the branch pipe 15 when not in use, so as to avoid the inflow of liquids such as infusion solution and blood return from the main pipe 11 and the needle 12 .

Please refer to FIG. 8 , in one embodiment, the injection end 101 of the infusion tube 1 and the connecting member 16 are assembled with each other in a threaded structure.

Please refer to FIG. 9 to FIG. 13 , the flow rate adjusting device 20 is close to a cylinder for accommodating the liquid medicine (not shown for conventional use). In the infusion tube 1, the box body 21 is provided with two guide grooves 22 on two sides opposite to the infusion tube 1, and the distance between the two guide grooves 22 is gradually reduced from large to small, and the two guide grooves 22 are arranged in a movable shape The second roller 23, the box body 21 is provided with a push button 24, the push button 24 is used to push the two rollers 23 to move along the two guide grooves 22, so that the two rollers 23 can be relatively clamped or away from the infusion tube 1.

In one embodiment, two sides of the roller 23 are provided with axles 231, the push button 24 is provided with a roller groove 241, and the axle 231 is arranged in the roller groove 241 and the guide groove 22, so that the axle 231 can be pushed by the push button 241. The button 24 is pushed, and can move and rotate according to the guide groove 22 .

In one embodiment, the box body 21 is provided with two through holes 25 on two side surfaces, the push button 24 is provided with two push parts 242 on the two side surfaces opposite to the through holes 25, and the push parts 242 are matched to the through holes 25 , for applying a pushing force to the push portion 242 to push the push button 24 to move along the through hole 25 .

In one embodiment, the push button 24 is provided with a fitting groove 243 , which can be sleeved on the infusion tube 1 and move along the infusion tube 1 when pushed.

In one embodiment, the box body 21 is made of plastic material and has two fixing grooves 26 opposite to the infusion tube 1 for clamping and fixing to the infusion tube 1 .

The above is the introduction of each component of the present invention and its composition, and then the use examples, characteristics and benefits of the present invention are introduced as follows:

Please refer to Fig. 5. The main pipe 11 uses the principle of the valve plate 14 with the non-return structure and the valve. The valve plate seat 13 where the valve plate 14 is arranged is made of plastic, and the valve plate 14 is made of silicone material and can be elastically deformed. When the infusion solution flows to the valve plate 14 by gravity and high potential energy, the valve plate 14 is pushed open and deformed by its pressure to open the through hole 131 downward, so that the infusion solution flows to the patient side through the through hole 131 .

Please refer to Fig. 6, when the patient's limb height and pressure change or the infusion is empty, the main pipe 11 is shown in an upside-down state, and the blood returning from the venous end can push the valve plate 14, so that the valve plate 14 returns to The through hole 131 is closed to achieve the anti-reverse effect, which can prevent back blood.

Referring to FIG. 7, the sealing column 151 inserted in the branch tube 15 can be removed, and the external empty needle 2 can be inspected for blood return to confirm the position of the venous indwelling needle.

Please refer to Fig. 12 and Fig. 13, the present invention changes the traditional adjusting speed dropper clamp to a two-wheel push button design. At the same time, push the two rollers 23 to move upward, the two rollers 23 are relatively far away from the infusion tube 1 because they are guided and limited by the two guide grooves 22, and the infusion tube 1 between the two rollers 23 is not clamped, so that the diameter of the tube becomes wider. , the flow rate increases.

Please refer to FIG. 14 to FIG. 17 , when the pusher 242 pushes the push button 24 to push down according to the through hole 25 , it also pushes the two rollers 23 to move down, and the infusion tube 1 between the two rollers 23 is pushed down. Being clamped, the diameter of the pipe is narrowed and the flow rate is slowed down, so as to achieve the purpose of convenient and precise speed regulation.

Please refer to FIG. 18 to FIG. 21 , the infusion tube 1 of the present invention further includes a dosing valve 30 , the dosing valve 30 includes a base 40 and a hole seat 50 , the base 40 has a through hole 41 , the through hole 41 . The hole 41 communicates with the infusion tube 1 , the hole seat 50 is combined with the base 40 , and the hole seat 50 is provided with a dosing hole 51 and a chamber 52 in communication with each other, and the chamber 52 has a valve body 60 , The valve body 60 is provided with an inclined surface 61 and the lower part of the valve body 60 shields the through hole 41 . The valve body 60 is sleeved with an elastic body 70 , and the elastic force of the elastic body 70 is used to seal contact with the inner wall surface of the chamber 52 , and keep a gap between the valve body 60 and the inner wall surface of the chamber 52 , so that the valve body 60 can move elastically to open the through hole 41 and communicate with the chamber 52 .

In one embodiment, a sealing ring 42 is sleeved on the base 40 , so that the joint between the hole seat 50 and the base 40 is sleeved and sealed to prevent leakage.

In one embodiment, the valve body 60 is provided with a groove 62 for securing the elastic body 70 .

In one embodiment, the elastic body 70 is provided with a flange 71 on one side to increase the thickness and height of the elastic body 71 , so as to enhance the elastic restoring force generated by pressing the elastic body 70 after the valve body 60 moves.

In one embodiment, the base 40 of the dosing valve 30 of the infusion tube 1 has a socket 43 under the base 40 , and the base 40 is connected to the infusion tube 1 by means of the socket 43 .

Accordingly, the front end of the syringe 90 (without a needle) can be inserted into the hole seat 50 to press down the inclined surface 61 of the valve body 60, and the valve body 60 can be moved by the action of the inclined surface to open the through hole 41. In order to communicate with the chamber 52, the through hole 41, and the infusion tube 1, the medicinal liquid (such as drip solution and intravenous infusion) of the syringe 90 can be injected into the infusion tube 1 through the hole seat 50 and the base 40, which can eliminate the inner part of the infusion cannula. The cavity can reduce the chance of air storage, which can greatly reduce the exhaust time and the pain of repeatedly tapping the exhaust with fingers, and also reduce the chance of air being introduced into the patient's body, improving the safety of the patient.

The infusion tube of the present invention is the most comprehensive intravenous infusion cannula at present, and has at least the following functions:

1. Safe use: The anti-return device can avoid venous blood return and reduce the probability of pipeline embolism needing to be re-placed; in addition, the push-through dosing valve structure does not require needles when adding drugs, avoiding needle sticks and reducing pipeline residues. Air flow into the body.

2. Exhaust downstream flow: The push-through zero residual gas dosing valve structure completely eliminates the air entering the internal cavity of the dosing valve.

3. Exhaust-free time-consuming: By eliminating the characteristics of exhaust, the internal cavity of the infusion tube can be eliminated, air storage can be reduced, and the time-consuming of exhaust can be saved.

4. Simple and labor-saving: There is no space for gas remaining inside, which is not easy to cause gas generation, and reduces repeated and laborious beating when exhausting.

5. Operation convenience: The push button sliding design makes it more immediate and precise to adjust the dripping speed.

6. Care efficiency: the above-mentioned safety, no exhaust, time-saving, labor-saving, convenience, and high care efficiency are combined.

The above-mentioned examples of this case are only for convenience of illustration, and should not limit the meaning of this case, that is, all kinds of transformation designs based on the listed scope of the patent application should be included in the scope of the patent of this case.

Infusion tube 1 Injection end 101 Empty needle 2 Anti-return device 10 Supervisor 11 Hook 111 Needle 12 Valve seat 13 Through hole 131 Valve 14 Branch pipe 15 Sealing post 151 Connector 16 Flange 161 Rubber ring 17 Adjusting the flow rate device 20                   Axle 231 Push button 24 Roller groove 241 Push part 242 Fitting groove 243 Perforation 25 Fixing groove 26 Dosing valve 30 Base 40 Through hole 41 Sealing ring 42 Sleeve 43 Hole seat 50 Dosing hole 51 Container 52 Body 60 Bevel 61 Groove 62 Elastomer 70 Flange 71 Syringe 90

Figure 1 is a perspective view of the present invention. Fig. 2 is a perspective view of the anti-return device of the present invention. Fig. 3 is an exploded perspective view of the anti-return device of the present invention. Fig. 4 is a cross-sectional view of the anti-return device of the present invention. Fig. 5 is a sectional view 1 of a use example of the anti-return device of the present invention. Fig. 6 is a second cross-sectional view of the use example of the anti-return device of the present invention. Fig. 7 is a cross-sectional view 3 of a use example of the anti-return device of the present invention. Fig. 8 is a cross-sectional view of another embodiment of the assembly structure of the connecting piece and the injection end of the present invention. Fig. 9 is a perspective view of the device for adjusting the flow rate of the present invention. Fig. 10 is an exploded perspective view of the device for adjusting the flow rate of the present invention. Fig. 11 is an exploded perspective view of the push button of the present invention being sleeved on an infusion tube. Fig. 12 is a front view of the device for adjusting the flow rate of the present invention. Fig. 13 is a cross-sectional view of the flow rate adjusting device of the present invention. Fig. 14 is a view before the push button of the present invention is moved to the middle position to adjust the flow rate. Fig. 15 is a sectional view of the present invention when the push button is moved to the middle position to adjust the flow rate. Fig. 16 is a view before the push button of the present invention is moved to the lower position to adjust the flow rate. Fig. 17 is a sectional view of the present invention when the push button is moved to the lower position to adjust the flow rate. Fig. 18 is a perspective view of the dosing valve of the present invention. Fig. 19 is an exploded perspective view of the dosing valve of the present invention. Figure 20 is a cross-sectional view of the dosing valve of the present invention. Fig. 21 is a diagram showing an example of use of the dosing valve of the present invention.

Infusion tube 1                 10 Injection end 101 Needle 12 Flow rate adjustment device 20 Dosing valve 30

Claims (10)

An infusion tube structure, the infusion tube comprises: A non-return device is installed at the injection end of the infusion tube. The non-return device has a main pipe for connecting one end to the injection end and the other end to connect the needle. The main pipe has a valve seat inside the valve seat. There are several through holes, and a valve plate is arranged between the through holes. The valve plate is selected from elastic materials, so that the valve plate elastically closes the through holes. The infusion tube structure according to claim 1, wherein the upper side of the main pipe is provided with several elastic hooks, the several elastic hooks clamp a flange provided on a connecting piece, and a rubber ring is arranged on one side of the flange to connect the The fitting makes the rubber ring press against the valve seat and the inner wall of the main pipe, so that the anti-return device has a sealing and leak-proof effect, and the connecting piece is sleeved on the injection end. The infusion tube structure according to claim 1, wherein a sealing column is inserted into the branch tube, so as to have the function of sealing and blocking when the branch tube is not in use. The infusion tube structure according to claim 2, wherein the injection end of the infusion tube and the connector are assembled with each other in a threaded structure. An infusion tube structure, the infusion tube comprises: A device for adjusting the flow rate is close to a cylinder for accommodating the liquid medicine. The device for adjusting the flow rate is fixed to the infusion tube with a box body. The box body is provided with two guide grooves on two sides opposite to the infusion tube. The distance between the two guide grooves is gradually reduced from large to small. The two guide grooves are provided with two movable rollers. The box body is provided with a push button, which is used to push the two rollers to move according to the two guide grooves. , and the two rollers can be relatively clamped or kept away from the infusion tube. The infusion tube structure according to claim 5, wherein a wheel shaft is provided on both sides of the roller, a roller groove is provided on the push button, and the wheel shaft is matched with the roller groove and the guide groove, so that the wheel shaft can be used by the wheel shaft. The push button pushes, and can move and rotate according to the guide groove. The infusion tube structure according to claim 5, wherein the box body is provided with two perforations on two side surfaces, the push button is provided with two push parts on the two side surfaces opposite to the perforations, and the push parts are arranged on the The perforation is used for applying a pushing force to the push part to push the push button to move according to the perforation. The infusion tube structure according to claim 5, wherein the push button is provided with a fitting groove, which can be sleeved on the infusion tube and move along the infusion tube when pushed. The infusion tube structure as claimed in claim 5, wherein the box body is selected from plastic materials and is provided with two fixing grooves relative to the infusion tube for clamping and fixing to the infusion tube. The infusion tube structure according to claim 1 and claim 5, further comprising a dosing valve, the dosing valve comprising a base and a hole seat, the base has a through hole, and the through hole communicates with the infusion tube, The hole seat is combined with the base, and the hole seat is provided with a medicine dosing hole and a accommodating chamber which communicate with each other. The accommodating chamber has a valve body. Through hole, the valve body is sleeved with an elastic body, and the elastic force of the elastic body is used to seal contact with the inner wall surface of the chamber, and keep a gap between the valve body and the inner wall surface of the chamber, so that the valve body can The elastic-like movement opens the through hole and communicates with the chamber.

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