Disposable syringe for progesterone injection

Abstract

The utility model provides a kind of disposable special syringe of progesterone injection, comprising: syringe needle, syringe nipple interface, syringe empty cylinder, syringe rubber plug, syringe push rod and protrusion, protrusion is located at the central end of syringe rubber plug, the outer wall of protrusion is equipped with medicine passing groove, the outer diameter of protrusion is equal to the inner diameter of syringe nipple interface, the end of protrusion is equipped with the medicine injection hole for connecting the inside of medicine passing groove, with equal inner diameter of syringe needle;When reducing drug residue, syringe push rod pushes syringe rubber plug to push forward the medicine in the inside of syringe empty cylinder to injection molding, when syringe rubber plug is close to movement to the end of syringe empty cylinder, protrusion is inserted into the inside of syringe nipple interface, reduce the drug solution residue in the inside of syringe nipple interface, the drug solution between syringe rubber plug and the end of syringe empty cylinder is guided into medicine injection hole by medicine passing groove at this time, then from medicine injection hole into the inside of syringe needle.

Description

Technical Field

[0001] This utility model relates to the field of syringe technology, and in particular to a special syringe for disposable progesterone injection. Background Technology

[0002] In the medical field, syringes are widely used for drug injection. Progesterone injection is a commonly used drug in obstetrics and gynecology. It is used for menstrual disorders, such as amenorrhea and dysfunctional uterine bleeding, luteal insufficiency, threatened abortion and habitual abortion (caused by luteal insufficiency), and the treatment of premenstrual syndrome. With the increasing number of infertile patients, assisted reproductive technology is becoming more and more recognized. Progesterone injection plays an irreplaceable role, especially in the field of assisted reproduction. Its common specifications are (1) 1ml:10mg (2) 1ml:20mg. The commonly used dosage is generally between 10mg-60mg (1-3ml) depending on the treatment needs of the disease. The drug is a colorless or pale yellow clear oily liquid. In clinical practice, it is mostly administered intramuscularly using a disposable 5ml syringe. There is no fixed and unified standard.

[0003] Currently, the disposable 5ml syringes used in clinical practice use a No. 7 needle, approximately 3cm in length. The inner diameter of the empty syringe is approximately 1.5cm, the length is approximately 7.5cm, and the capacity is 5ml. The nipple and plunger are directly connected. The plunger is made of transparent soft plastic. Because progesterone injection is an oil-based solution with high viscosity, drawing and injecting the medication is very laborious. Drawing one 1ml vial of progesterone takes an average of about half a minute, dozens of times longer than drawing water-based solutions. When the connection between the needle and the nipple is not tight, excessive injection pressure can easily cause slippage and spraying of the medication. Furthermore, if the needle is not inserted deep enough to reach the muscle layer, it will not only fail to achieve the therapeutic effect but may also cause local induration and pain. This is especially true for patients undergoing IVF-ET (in vitro fertilization), who require 60mg of progesterone injection intramuscularly daily for 14 days for luteal support, continuing until around the 12th week of pregnancy. This involves not only a large dosage but also a very long treatment period.

[0004] Existing syringes have the following problems: 1. They are too large to be suitable for precise injection of progesterone; 2. Medication residue remains inside the nipple interface of existing syringes. Therefore, a disposable progesterone injection syringe is proposed. Utility Model Content

[0005] To address at least one of the aforementioned technical shortcomings, this utility model provides a disposable progesterone injection syringe, comprising: a syringe needle, a syringe nipple interface, a syringe empty cylinder, a syringe rubber stopper, a syringe plunger, and a protrusion. The protrusion is located at the central end of the syringe rubber stopper, and a drug-passing groove is formed on the outer wall of the protrusion. The outer diameter of the protrusion is equal to the inner diameter of the syringe nipple interface, and the end of the protrusion is provided with an injection hole with an inner diameter equal to the inner diameter of the syringe needle for connecting to the inside of the drug-passing groove.

[0006] Furthermore, the syringe stopper has a through friction sealing hole in the center, a protrusion is connected to the inside of the syringe stopper, the friction sealing hole has a sealing block connected to the drug passage groove, and the protrusion is fixedly connected to the syringe plunger.

[0007] Furthermore, the raised outer wall is equipped with graduation lines with an accuracy that is 2, 5, or 10 times that of the graduation lines on the outer wall of the syringe barrel.

[0008] Furthermore, the frictional force between the inner wall of the friction sealing hole and the outer wall of the protrusion is greater than or equal to the frictional force between the outer wall of the syringe stopper and the syringe barrel.

[0009] Furthermore, the inner wall of the syringe barrel is provided with a barrier ring.

[0010] Furthermore, the syringe needle is threadedly connected to the syringe nipple interface. Beneficial effects

[0011] When reducing drug residue, the syringe plunger pushes the syringe stopper forward to inject the drug into the syringe barrel. When the syringe stopper moves to the end of the syringe barrel, the protrusion inserts into the syringe nipple interface, reducing the drug residue inside the syringe nipple interface. At this time, the drug between the syringe stopper and the end of the syringe barrel is introduced into the injection hole through the drug channel, and then enters the inside of the syringe needle from the injection hole.

[0012] When injecting medication, the obstruction ring is initially positioned at the high-dose mark during manufacturing. A large dose is injected first, and the syringe plunger pushes the syringe stopper inward. When the inner edge of the stopper contacts the obstruction ring, a large frictional force is generated, completing the large-dose injection. The stopper then remains stationary, and the syringe plunger continues to push the protrusion forward, allowing for the injection of smaller doses, thus achieving precise injection.

[0013] The syringe needle is mounted on the syringe nipple interface, which is fixed to the end of the syringe barrel. The syringe rubber stopper moves inside the syringe barrel in a sealed connection, and the syringe plunger is integrated with the syringe rubber stopper.

[0014] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the entire utility model. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the entire utility model. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the protrusion of this utility model.

[0018] Figure 4 This is a cross-sectional view of the syringe stopper of this utility model.

[0019] Figure 5 This is a schematic diagram of the obstruction ring of this utility model.

[0020] exist Figures 1 to 5 The correspondence between the component names or lines and the attached drawing numbers is as follows: 1. Syringe needle, 2. Syringe nipple interface, 3. Syringe empty cylinder, 301. Obstruction ring, 4. Syringe rubber stopper, 401. Friction sealing hole, 5. Syringe plunger, 6. Protrusion, 601. Drug passage groove, 602. Detailed Implementation

[0021] Please refer to Figures 1 to 5 ; This embodiment provides a disposable progesterone injection syringe, see reference. Figures 1 to 4 It includes: a syringe needle 1, a syringe nipple interface 2, a syringe empty cylinder 3, a syringe rubber stopper 4, a syringe plunger 5, and a protrusion 6. The protrusion 6 is located at the center end of the syringe rubber stopper 4. A drug-feeding groove 601 is formed on the outer wall of the protrusion 6. The outer diameter of the protrusion 6 is equal to the inner diameter of the syringe nipple interface 2. The end of the protrusion 6 is provided with an injection hole 602 with an inner diameter equal to the inner diameter of the syringe needle 1 for connecting to the inside of the drug-feeding groove 601.

[0022] Syringe needle 1: A 7.5 gauge needle with a length of 3.5cm is used. Its advantages: Compared with the currently used 5ml syringe, the needle is thicker and longer, which not only saves time and effort in drawing and pushing the liquid, but also meets the requirements of deep intramuscular injection.

[0023] Syringe empty barrel 3: inner diameter about 1cm, capacity 3.5ml, length about 8cm. Its advantages: the inner diameter of the syringe empty barrel is smaller than that of the current 5ml syringe, which reduces the resistance to pushing the medicine, saves time and effort, increases work efficiency, reduces pain, and reduces the loss of medicine adhering to the wall.

[0024] Syringe stopper 4: The shape should fill the inside of the nipple, that is, add a protrusion 6 in the center of the circle. Its advantages are: no air bubbles are formed when drawing the medicine and no waste when pushing the medicine.

[0025] Syringe plunger 5: Made of medical-grade PP material, it is sturdy and durable. Its advantages include greater stability and durability during forceful injection of medication.

[0026] In practice, the syringe needle 1 is installed on the syringe nipple interface 2, the syringe nipple interface 2 is fixed to the end of the syringe barrel 3, the syringe rubber stopper 4 is sealed and connected to the inside of the syringe barrel 3, and the syringe plunger 5 is connected to the syringe rubber stopper 4 as one piece.

[0027] When reducing drug residue, the syringe plunger 5 pushes the syringe stopper 4 forward to inject the drug inside the syringe barrel 3. When the syringe stopper 4 moves to the end of the syringe barrel 3, the protrusion 6 is inserted into the inside of the syringe nipple interface 2, reducing the drug residue inside the syringe nipple interface 2. At this time, the drug between the syringe stopper 4 and the end of the syringe barrel 3 is introduced into the injection hole 602 through the drug channel 601, and then enters the inside of the syringe needle 1 from the injection hole 602.

[0028] Further reference Figure 4 The syringe stopper 4 has a through friction sealing hole 401 in the center. The protrusion 6 is sealed and connected to the inside of the syringe stopper 4. The friction sealing hole 401 is provided with a sealing block and sealed and connected to the drug passage groove 601. The protrusion 6 is fixedly connected to the syringe plunger 5.

[0029] In practical implementation, the friction sealing hole 401 allows the protrusion 6 to move and seal inside the friction sealing hole 401. When the syringe plunger 5 is pulled outward, the protrusion 6 can move outward, allowing progesterone to be extracted. The sealing block is connected to the drug passage 601, allowing the sealing block to seal the drug passage 601. When the sealing block moves to the end of the drug passage 601, it is restricted, preventing the protrusion 6 from separating from the syringe stopper 4. If the syringe plunger 5 is pulled outward, the syringe stopper 4 moves outward, allowing progesterone or diluent to be extracted.

[0030] Furthermore, the outer wall of the protrusion 6 is provided with graduation lines with an accuracy that is 2, 5, or 10 times that of the graduation lines on the outer wall of the syringe barrel 3.

[0031] In practical implementation, when performing precise injection, the protrusion 6 is pushed to perform injection with ten times the precision. For example, if the precision of the outer wall of the syringe barrel 3 is 1 ml, the precision of the protrusion 6 is 0.1 ml.

[0032] Scale line observation: Observe the scale line that is aligned with the inner end face of the syringe stopper 4.

[0033] For example, 5 times: the precision of the outer wall of the syringe barrel 3 is 1 ml, and the precision of this protrusion 6 is 0.2 ml.

[0034] For example, 2 times: the precision of the outer wall of the syringe barrel 3 is 1ml, and the precision of this protrusion 6 is 0.5ml.

[0035] This 2x, 5x, or 10x precision can be customized according to the actual situation.

[0036] Furthermore, the frictional force between the inner wall of the friction sealing hole 401 and the outer wall of the protrusion 6 is greater than or equal to the frictional force between the outer wall of the syringe stopper 4 and the syringe barrel 3.

[0037] In practice, the friction force is controlled by adjusting the roughness of the inner wall of the friction sealing hole 401 and the outer wall of the protrusion 6.

[0038] Further reference Figure 5 The inner wall of the syringe barrel 3 is provided with a barrier ring 301.

[0039] In practice, when drawing up the liquid medicine, the syringe plunger 5 is pulled, and the obstruction ring 301 comes into contact with the edge of the outer end of the syringe stopper 4, forming a huge frictional force. At this time, the syringe plunger 5 is pulled, causing the protrusion 6 to be pulled outward. When the sealing block moves to the end of the medicine passage 601, the sealing block abuts against the end of the medicine passage 601. At this time, the syringe stopper 4 is subjected to the full pulling force. The syringe stopper 4 overcomes the huge frictional force of the obstruction ring 301, causing the syringe stopper 4 to move outward and draw the liquid medicine into the interior of the syringe barrel 3.

[0040] When injecting medication, the blocking ring 301 is initially positioned at the large-dose graduation line. For example, when injecting 1.1-1.9 ml, the blocking ring 301 is positioned at 1 ml; when injecting 2-2.9 ml, it is positioned at 2 ml; and when injecting 3 ml, it is positioned at 3 ml. A large dose is injected first, and the syringe plunger 5 pushes the syringe stopper 4 inward. When the inner edge of the syringe stopper 4 contacts the blocking ring 301, a large frictional force is generated, completing the large-dose injection. The syringe stopper 4 remains stationary, and the syringe plunger 5 continues to push the protrusion 6 forward, using the protrusion 6 to inject smaller doses, thus achieving precise injection.

[0041] Further reference Figure 1 and Figure 2 The syringe needle 1 is threadedly connected to the syringe nipple interface 2.

[0042] In practical implementation, syringe nipple interface 2: A threaded design is added to the outer periphery of the original nipple, and the needle plug is firmly sealed by screwing. Its advantages are: preventing slippage of the drug during the injection process, making drug administration more accurate and without waste.

Claims

1. A disposable progesterone injection syringe, comprising: The syringe needle (1), syringe nipple interface (2), syringe empty cylinder (3), syringe rubber stopper (4), syringe plunger (5) and protrusion (6) are characterized in that: the protrusion (6) is located at the center end of the syringe rubber stopper (4), the outer wall of the protrusion (6) is provided with a drug-feeding groove (601), the outer diameter of the protrusion (6) is equal to the inner diameter of the syringe nipple interface (2), and the end of the protrusion (6) is provided with a drug injection hole (602) with an inner diameter equal to the inner diameter of the syringe needle (1) for connecting the inside of the drug-feeding groove (601).

2. The disposable progesterone injection syringe according to claim 1, characterized in that: The syringe stopper (4) has a through friction sealing hole (401) in the center. The protrusion (6) is sealed and connected to the inside of the syringe stopper (4). The friction sealing hole (401) is provided with a sealing block and sealed and connected to the drug passage groove (601). The protrusion (6) is fixedly connected to the syringe plunger (5).

3. The disposable progesterone injection syringe according to claim 2, characterized in that: The outer wall of the protrusion (6) is provided with a scale line with an accuracy that is 2, 5 or 10 times that of the scale line on the outer wall of the syringe barrel (3).

4. The disposable progesterone injection syringe according to claim 3, characterized in that: The frictional force between the inner wall of the friction sealing hole (401) and the outer wall of the protrusion (6) is greater than or equal to the frictional force between the outer wall of the syringe rubber stopper (4) and the syringe barrel (3).

5. The disposable progesterone injection syringe according to claim 4, characterized in that: The inner wall of the syringe barrel (3) is provided with a barrier ring (301).

6. The disposable progesterone injection syringe according to claim 5, characterized in that: The syringe needle (1) is threadedly connected to the syringe nipple interface (2).

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