TWI687245B - Infusion cannula - Google Patents

Abstract

An infusion cannula includes a barrel and an infusion tube. The barrel and the infusion tube are respectively provided with a dosing valve. The dosing valves include a base and a hole seat. The base has a through hole and the hole seat Combined with the base, the hole seat is provided with a dosing hole and a containing chamber communicating with each other, the containing chamber has a valve body, the valve body is provided with an inclined surface portion and the through hole is blocked under the valve body, An elastic body is sleeved on the valve body, and the inner wall surface of the chamber is sealed and contacted by the elastic force of the elastic body, and a gap is maintained between the valve body and the inner wall surface of the chamber. In order to extend the front end of the syringe into the hole seat and press down the inclined part of the valve body, the valve body is moved by the action of the inclined surface to open the through hole, so that the medical solution of the syringe can be injected into the infusion through the hole seat and the base The tube or barrel can eliminate the internal cavity of the infusion sleeve, reduce the chance of air storage, greatly reduce the time of exhausting and the pain of fingers repeatedly tapping the exhaust, and also reduce the chance of air being introduced into the patient's body, improving patient safety Sex.

Description

Infusion cannula

The invention relates to an infusion cannula, in particular, it has a dosing valve and a clamping slot, which is convenient for venting, preventing slippage and reducing operation errors.

1. Creative motivation and purpose:

1. Creative motivation:

Intravenous infusion is a common route of administration for treating patients. According to statistics, about 80% of patients will receive intravenous injection during hospitalization. In order to maintain the safety of medical personnel's operation and reduce the accident of needle sticking, the injection hole of the lower part of the intravenous infusion tube currently used in clinic has been changed to a needle-free safety design. However, the structure of the needle-free safety design is due to the combination of the medicine injection hole and the needle site. It is easy to store air inside, and it is more difficult to exhaust than the traditional structure. In addition, in order to reduce the gas retention of the infusion tube, it also takes a lot of time to train the nursing staff to exhaust; furthermore, a plastic sleeve is attached to the intravenous infusion set for Temporarily fix and store tubing and needles, but poor design can also lead to needle sticks and tubing slippage. Both of the above two deficiencies will jeopardize patient safety and increase medical costs. Therefore, based on the nursing staff's responsibility and mission to the patient's health, how to improve the shortcomings of the aforementioned intravenous infusion sets is indeed necessary.

2. Creative purpose:

Gas embolism is mainly determined by the mechanism of gas entry and the position of the last embolization of bubbles. When gas is injected into a vein, most of the gas will reach the lungs along with the venous circulatory system. The lungs are the main gas filtering organs in the body. It can conduct effective gas exchange through large-area contact, and sieve out most of the gas and discharge it outside the body. The main cause of gas embolism is iatrogenic, which occurs when the pressure at the venous incision needs to be lower than the ambient atmospheric pressure. For example, leakage of a central venous catheter or a hemodialysis catheter may cause venous embolism. In addition, if the body has arteriovenous shunt (AV shunt) or the amount of injected gas exceeds the filtering amount of the lungs, venous gas embolism may develop into arterial gas embolism. Severe patients have multiple organ failure and shock potential death risks, and infusion therapy is often the first choice used to increase systolic pressure and increase tissue perfusion in the first place. The formation of sepsis is when infection, trauma or shock induces a local inflammatory response, which causes epidermal cells, vascular cells and macrophages to release a large number of pro-inflammatory factors, chemokines, and reactive oxygen species (ROS) , Causes fever, hypothermia, tachycardia, shortness of breath, increased or decreased white blood cells in the blood, increased vascular permeability and increased peripheral resistance, and systemic inflammation symptoms of disseminated intravascular coagulation.

3. How to solve the problem:

If the venous infusion tube is incompletely exhausted, a large amount of air enters the body, which increases the risk of gas embolism and endangers the life of the patient. In order to reduce the risk of gas embolism, the intravenous infusion set needs to be manually exhausted when the device is installed, and the needle-free safety dosing hole structure currently in clinical use provides more air-stay cavities, which instead causes the nursing staff to exhaust The difficulty of breathing requires continuous tapping of the cavity with fingers in order to exhaust the gas. In addition to causing pain to the fingers of the caregiver, it also increases the number of unnecessary care hours. Second, the patient needs to treat the disease, and the medical staff must regularly add a small amount of antibiotics to the IV bag for slow infusion. The intravenous infusion set is attached with a plastic sleeve for temporarily fixing and storing the tube and needle, but because of Poor design can also lead to needle sticks and slippage resulting in waste of medical materials and increased medical costs.

The present invention improves the design for two parts:

(1) Improve the internal and external structure of the dosing hole, eliminate the internal cavity and reduce the chance of air storage, which can greatly reduce the time of exhausting and the pain of fingers repeatedly tapping the exhaust, and also reduce the chance of air being introduced into the patient's body. Patient safety.

(2) The plastic sleeve of the intravenous infusion set is improved to a card slot design, which is arranged above the IV bag. This structure is convenient for fixing and storing the infusion line.

Based on the above, the most common occurrence of general infusion sets after use is incomplete exhaust. The structure is easy to store air and the exhaust is more difficult than the traditional structure. If the exhaust of the intravenous infusion tube is incomplete, a large amount of air enters the body and increases The risk of gas embolism is endangering the patient's life.

2. Introduction of related products:

As shown in the appendix, this invention compares the advantages and disadvantages of the present invention with the most commonly used infusion cannula and its three cannulas currently on the market.

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

It is based on the concept of continuous research and innovation of products, based on many years of practical experience in product design and development, as well as active and concentrated research and development thinking. Through countless actual tests and experiments, the invention has been produced.

The purpose of the present invention is to provide an infusion cannula with a dosing valve to facilitate venting, prevent slippage, and reduce operational errors.

To achieve the above purpose, the present invention includes a barrel and an infusion tube, wherein the barrel is used to contain a drug solution; the infusion tube communicates with the lower side of the barrel; wherein the barrel and the infusion tube are respectively provided There is a dosing valve. The dosing valve includes a base and a hole seat. The base has a through hole, the through hole communicates with the infusion tube or the barrel, the hole seat is combined with the base, the hole seat is provided with A medicine adding hole and a containing chamber communicated with each other, and the containing chamber has a valve body, the valve body is provided with an oblique surface portion and the through hole is blocked under the valve body, and the valve body is sleeved with an elastic body. The elastic force of the elastic body sealingly contacts the inner wall surface of the chamber, and maintains a gap between the valve body and the inner wall surface of the chamber for the valve body to move elastically to open the through hole and communicate with the chamber.

In order to extend the front end of the syringe into the hole seat and press down the inclined surface of the valve body, the valve body is moved by the action of the inclined surface to open the through hole to communicate with the chamber, the through hole, the infusion tube or the cylinder, so that The liquid of the syringe can be injected into the infusion tube or barrel through the hole seat and the base, which can eliminate the internal cavity of the infusion sleeve, reduce the chance of air storage, and greatly reduce the time of exhausting and repeated tapping of the exhaust by fingers Pain also reduces the chance of air being introduced into the patient and improves patient safety.

The following only uses specific embodiments and drawings to make detailed descriptions so that your review committee can have a better understanding and understanding of the functions and features of the present invention.

Please refer to FIGS. 1 to 4, the present invention includes a barrel 10 and an infusion tube 20. The following will explain in detail:

The barrel 10 is used to contain medicine liquid.

The infusion tube 20 communicates with the lower side of the barrel 10.

The barrel 10 and the infusion tube 20 are respectively provided with a dosing valve 30. The dosing valve 30 of the infusion tube 20 includes a base 40 and a hole seat 50. The base 40 has a through hole 41, and the through hole 41 communicates In the infusion tube 20, the hole seat 50 is combined with the base 40, and the hole seat 50 is provided with a dosing hole 51 communicating with each other, and a container chamber 52, the container chamber 52 has a valve body 60, the valve body An inclined surface 61 is provided on 60 and the through hole 41 is blocked under the valve body 60. The valve body 60 is sleeved with an elastic body 70. The elastic force of the elastic body 70 sealingly contacts the inner wall surface of the chamber 52 and makes The valve body 60 maintains a gap with the inner wall surface of the chamber 52 for the valve body 60 to move elastically to open the through hole 41 and communicate with the chamber 52.

In a structural embodiment, the base 40 is sleeved with a sealing ring 42 for the hole seat 50 and the base 40 to be sleeved to have a sealing and leakproof effect.

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

In a structural 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 increase the elastic restoring force generated by pressing the elastic body 70 after the valve body 60 moves.

In a structural embodiment, the infusion tube 20 has a socket 43 under the base 40 of the dosing valve 30, and the base 40 is sleeved and coupled to the infusion tube 20 by the socket 43.

The above is the introduction of the various components of the present invention and their composition, and then the use embodiments, features and benefits of the present invention are introduced as follows:

As shown in FIG. 5, the front end of the syringe 90 (without the need for 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 to connect the chamber 52, the through hole 41, and the infusion tube 20, so that the medical liquid (such as drip liquid and intravenous infusion) of the syringe 90 can be injected into the infusion tube 20 through the hole base 50 and the base 40. Eliminating the internal cavity of the infusion cannula, reducing the chance of air storage, can greatly reduce the time of exhausting and the pain of fingers repeatedly tapping the exhaust, and also reduce the chance of air being introduced into the patient's body, improving patient safety.

Please refer to FIG. 6 to FIG. 9, the structure, working principle and usage method of the medicine adding valve 30 of the barrel 10 are the same as the medicine adding valve 30 of the infusion tube 20, and also include a base 40 and an orifice 50. The description will not be repeated here.

The through hole 41 of the dosing valve 30 of the barrel 10 communicates with the barrel 10.

Please refer to FIG. 1 and FIG. 10, the surface of the cylinder body 10 has a plurality of elastic locking grooves 11 for the transfusion tube 20 to be detachably clamped in the elastic locking groove 11.

These structures can promote the nursing staff to be more concise and more convenient during the operation, and they can also be stored and fixed in accordance with the principle of sterility to prevent the pipeline from slipping and loosening.

The dosing valve of the present invention has at least the following benefits:

1. Safe removal: no needle is needed when adding medicine to avoid needle sticks; 2. Multi-applicability: according to the needs of the timing of use, different specifications of needles can be replaced, such as: pull back break type, sleeve rotation type, screw Mouth syringe; 3. Capacity adaptability: this design can follow various dosage changes of the doctor's advice; 4. Speed variability: each drug has its own function and mechanism, and everyone is also "absorbed, distributed, metabolized, excreted" by body tissues The impact of the four stages is different, but there are differences, so the injection time can be adjusted according to the patient's symptoms, such as: KCl infusion should not exceed 10ml per hour, and Gentamicin diluent can be injected at a rate of 1 to 2 hours; 5. Exhaust: In addition to reducing gas entering the body, the sliding zero-residue gas dosing valve structure can eliminate the internal cavity of the infusion sleeve, reduce the air storage space, and greatly reduce the exhaust time and the pain of repeated tapping of the exhaust with your fingers.

In addition, the invention can greatly reduce the probability of death of patients with air embolism, improve patient safety and quality of medical care, ease the psychological impact pressure on nursing staff; reduce unnecessary wear and tear and improve their medical costs, unnecessary expenses, and have medical costs Throttling function.

The elastic card slot of the present invention has at least the following benefits:

1. In line with fair usability: regardless of gender, age, medical institution, ward type; application flexibility: change the way of hanging according to the characteristics of the drug; 2. intuitive usability: simple structure, little difference from the original medical staff, Easy to get started; 3. Fault tolerance: it can avoid the falling of the pipeline hook and maintain the sterile state of the pipeline; 4. Labor saving: it is made of plastic material and keeps the pipeline placement area. Before use, just align it The card slot can be immediately fixed by gently pressing; 5. Lightness: It is made of plastic material and fixed on the body of the dosage drip cylinder. It is small in size, does not occupy space, is convenient to take, and is beneficial to perform nursing work.

The above-mentioned embodiments mentioned in this case are only for the convenience of explanation, but the meaning of this case cannot be limited in this way, that is, all kinds of altered designs according to the scope of the patent applications listed should be included in the scope of patents in this case.

10: cylinder 11: Elastic card slot 20: Infusion tube 30: Dosing valve 40: Base 41: through hole 42: Sealing ring 43: socket takeover 50: hole seat 51: Dosing hole 52: Room 60: valve body 61: Oblique face 62: groove 70: Elastomer 71: flange 90: syringe

Figure 1 is an exploded perspective view of the present invention. Figure 2 is a perspective view of the dosing valve of the infusion tube of the present invention. Fig. 3 is an exploded perspective view of the dosing valve of the infusion tube of the present invention. Fig. 4 is a cross-sectional view of the dosing valve of the infusion tube of the present invention. Fig. 5 is a diagram showing an example of the use of the dosing valve of the infusion tube of the present invention. Fig. 6 is a perspective view of the dosing valve of the barrel of the present invention. Figure 7 is an exploded perspective view of the dosing valve of the barrel of the present invention. Figure 8 is a cross-sectional view of the dosing valve of the barrel of the present invention. Fig. 9 is a diagram showing an example of use of the dosing valve of the cylinder of the present invention. Fig. 10 is an example of use of the elastic card slot of the present invention.

10: cylinder

11: Elastic card slot

20: Infusion tube

30: Dosing valve

Claims (6)

An infusion sleeve, including: A cylinder for containing liquid medicine; An infusion tube connected to the lower side of the barrel; Wherein the barrel and the infusion tube are respectively provided with a dosing valve. The dosing valves include a base and a hole seat, the base has a through hole, the through hole communicates with the infusion tube or the barrel, and the hole seat is combined On the base, the hole seat is provided with a dosing hole communicating with each other, a containing chamber, the containing chamber has a valve body, the valve body is provided with an inclined surface and the through hole is blocked under the valve body, the An elastic body is sleeved on the valve body, and the inner wall surface of the chamber is sealingly contacted by the elastic force of the elastic body, and a gap is maintained between the valve body and the inner wall surface of the chamber for the valve body to move elastically to Open the through hole and communicate with the chamber. The infusion sleeve as described in item 1 of the patent application scope, wherein the base is sleeved with a sealing ring, and the joint between the hole seat and the sleeve has a sealing and leakproof effect. The infusion sleeve as described in item 1 of the patent application scope, wherein the valve body is provided with a groove for sheathing the elastic body. The infusion cannula as described in item 1 of the patent application scope, wherein the elastic body is provided with a flange on one side to increase the thickness and height of the elastic body, so as to increase the pressure generated by the elastic body after the valve body moves Elastic resilience. The infusion sleeve as described in item 1 of the patent application scope, wherein the infusion tube has a set of connecting pipes under the base of the dosing valve, and the base is sleeved and coupled to the infusion tube by the set of connecting pipes. The infusion sleeve as described in item 1 of the patent application scope, wherein the surface of the barrel has a plurality of elastic clamping grooves for the detachable clamping of the infusion tube in the elastic clamping groove.

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