A small-dose special insulin dispensing needle

Abstract

The present application relates to the medical technical field, specifically to a small-dose special insulin dispensing needle, comprising a shell, a puncture needle, a quantitative part and an injection needle.The shell is detachably fixed on an insulin cartridge, and the whole insulin cartridge is contained in the shell.The present scheme is detachably communicated through the puncture needle and the injection needle, only one puncture of the puncture needle to the piston of the insulin cartridge is needed, and the insulin can be used multiple times, and the quantitative part can control the use amount of the insulin each time, so that the insulin cartridge is avoided from being repeatedly punctured, and the insulin can be quantitatively used.

Description

A small-dose dedicated insulin injection needle Technical Field

[0001] This invention relates to the field of medical technology, specifically to a small-dose dedicated insulin dispensing needle. Background Technology

[0002] In the gastroenterology department, there are many patients who need to fast due to illness or surgery, and many of these patients also have diabetes. During the fasting period, they need to supplement their energy with sugary drinks. In order to prevent the sugary drinks from causing hyperglycemia, doctors need to prescribe a solution containing a small dose of short-acting insulin added to the glucose solution to prevent hyperglycemia.

[0003] However, the inventors discovered during medication preparation that while an insulin pen cartridge contains 300 units (ml), only a few units or even just one or two units are needed each time. Therefore, the piston at the mouth of the cartridge is often repeatedly punctured. Insulin exposure to external irritants poses a risk of contamination, potentially leading to infection or other adverse reactions during injection. Existing insulin pen needles, which only require subcutaneous insertion, have a relatively short needle portion. However, when used for dispensing insulin into an infusion bag, the piston in the bag is too long, making it impossible to inject the insulin directly into the bag. Furthermore, the commonly used smallest 1ml needle is incompatible with insulin pen cartridges. Therefore, there is an urgent need for an insulin dispensing needle that eliminates the need for repeated cartridge punctures and prevents leakage and contamination. Summary of the Invention

[0004] The technical problem of this invention lies in the fact that existing insulin injection methods require multiple injections, leading to repeated punctures of the insulin cartridge. Furthermore, contact between insulin and external sources poses a risk of drug contamination, potentially causing infection or other adverse reactions during injection.

[0005] The basic solution provided by this invention: a small-dose dedicated insulin dispensing needle, comprising:

[0006] A housing, which is detachably fixed to the insulin pen cartridge;

[0007] A puncture needle, which is fixed to the housing, is used to puncture the piston of the insulin cartridge and extend into the insulin cartridge.

[0008] A quantitative sampling unit is connected to the puncture needle, and the quantitative sampling unit is used to quantitatively sample insulin in the insulin cartridge through the puncture needle.

[0009] An injection needle, which is detachably connected to the metering unit, is used to inject insulin into an infusion bag.

[0010] The principle and advantages of this invention are as follows: In existing technologies, insulin cartridges are typically repeatedly punctured to dispense insulin, but repeated punctures often lead to the risk of insulin leakage. This invention, however, uses a detachable connection between the puncture needle and the injection needle, requiring only one puncture of the insulin cartridge's piston with the puncture needle to dispense insulin multiple times. The metering unit controls the amount of insulin dispensed each time, thus avoiding repeated punctures while still providing precise insulin dispensing.

[0011] Furthermore, the metering unit includes a pump wheel, a pump housing, and a handle. The pump housing is cylindrical, the pump wheel is disposed inside the pump housing, and the handle passes through the pump housing and is fixedly connected to the center of the pump wheel. The two ends of the pump housing are respectively connected to the puncture needle and the injection needle. Rotating the handle can pump insulin quantitatively from the insulin cartridge through the pump wheel.

[0012] Furthermore, the inner diameter of the pump housing is larger than the inner diameter of the puncture needle, and the pump wheel can pump 0.01 ml of insulin from the insulin cartridge in one rotation.

[0013] Beneficial effects: When preparing insulin, sometimes only 0.01 ml of insulin is needed, but it is difficult to control the dosage so precisely by drawing it with a syringe alone. This solution improves the accuracy of insulin dosage by setting up a quantitative section and using a pump wheel.

[0014] Furthermore, the inner diameter of the puncture needle is larger than the inner diameter of the injection needle, and the length of the injection needle is 15-30mm.

[0015] Furthermore, the pump housing is provided with a locking part at one end that communicates with the injection needle, and the injection needle is provided with a locking element that engages with the locking part.

[0016] Furthermore, the pump housing is provided with a cavity containing alcohol, and the cavity is connected to an atomizing nozzle facing the injection needle.

[0017] Furthermore, the engaging part is an elastic engaging part, and the engaging component overcomes the elastic force and engages with the engaging part. The switching of the atomizing nozzle is linked to the engaging part.

[0018] Beneficial effects: In this solution, an atomizing nozzle is set in the pump housing facing the locking part, and a switch linked to the atomizing nozzle is set in the locking part, so that the switch can be triggered when the injection needle is inserted into the locking part, and the alcohol in the cavity can be sprayed out from the atomizing nozzle, thereby disinfecting the injection needle.

[0019] Furthermore, the housing is a plastic-supported housing. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the structure of a small-dose special insulin dispensing needle according to an embodiment of the present invention.

[0021] Figure 2 is a schematic diagram of the pump housing-injection needle connection of a small-dose special insulin dispensing needle according to Embodiment 1 of the present invention.

[0022] Figure 3 is a schematic diagram of region A of a small-dose special insulin dispensing needle according to Example 1 of the present invention.

[0023] Figure 4 is a schematic diagram of region B structure in Embodiment 1 of the low-dose dedicated insulin dispensing needle of the present invention. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The markings in the accompanying drawings include: left shell 1, right shell 2, fixed cover 3, puncture needle 4, pump shell 5, handle 6, groove 7, rotating shaft 8, pressure block 9, cavity 10, elastic inner wall 11, atomizing nozzle 12, injection needle 13, and pump wheel 14.

[0026] The specific implementation process is as follows:

[0027] Example 1

[0028] Example 1 is basically as shown in Figure 1. A small-dose dedicated insulin dispensing needle includes a shell, a puncture needle 4, a metering section, and an injection needle 13. The shell is detachably fixed to the insulin cartridge, housing the entire insulin cartridge inside.

[0029] Specifically, the shell is cylindrical and includes a left shell 1, a right shell 2 and a fixing ring. The left shell 1 and the right shell 2 are semi-cylindrical. The rear ends of the left shell 1 and the right shell 2 are hinged. The fixing cover 3 is provided with internal threads. The outer surfaces of the front ends of the left shell 1 and the right shell 2 are provided with threads. After the left shell 1 and the right shell 2 are closed, they are fixed by being threaded to the fixing cover 3.

[0030] The puncture needle 4 is fixed at the front end of the housing, that is, at the center of the fixing cover 3. The bottom of the puncture needle 4 is inserted into the insulin pen cartridge through the housing. The two ends of the quantitative part are connected to the puncture needle 4 and the injection needle 13 respectively.

[0031] As shown in Figure 4, the metering unit includes a pump wheel 14, a pump housing 5, and a handle 6. The pump wheel 14 is rotatably connected to the inside of the pump housing 5, and the handle 6 passes through the pump housing 5 and is welded to the center of the pump wheel 14.

[0032] The pump housing 5 is cylindrical, and the two ends of the pump housing 5 are respectively provided with the insertion port of the puncture needle 4 and the insertion port of the injection needle 13. The inner diameter of the pump housing 5 is larger than the outer diameter of the puncture needle 4. In this embodiment, the pump wheel 14 can pump 0.01ml of insulin from the insulin cartridge in one revolution.

[0033] The injection needle 13 is 15mm long, but it can also be 30mm in other embodiments. The pump housing 5 is provided with a locking part at the end that communicates with the injection needle 13, and the injection needle 13 is provided with a locking element that engages with the locking part.

[0034] Specifically, as shown in Figures 2 and 3, a groove 7 is provided on the inner wall of the connection hole between the pump housing 5 and the injection needle 13. A rotating shaft 8 and a pressure block 9 are provided in the groove 7. A torsion spring is provided on the rotating shaft 8, with one end of the torsion spring embedded in the rotating shaft 8 and the other end embedded in the pressure block 9. The groove 7 has an elastic inner wall 11. A cavity 10 is provided on the pump housing 5 along the elastic inner wall 11. The cavity 10 stores alcohol and is connected to an atomizing nozzle 12 facing the injection needle 13. The locking component is an elastic protruding ring at the bottom of the injection needle 13. The locking component overcomes the elastic force and engages with the locking part. The switching of the atomizing nozzle 12 is linked to the locking part.

[0035] When the injection needle 13 is inserted into the connecting hole, the injection needle 13 presses the pressure block 9 into the groove 7. The groove 7 contacts the elastic inner wall 11, and the elastic inner wall 11 is squeezed. The alcohol in the cavity 101 is squeezed out by the atomizing nozzle 12 and sprayed out as an alcohol spray after being atomized by the atomizing nozzle 12, thereby disinfecting the injection needle 13 and preventing the injection needle 13 from contaminating the liquid after entering the liquid bag, thus protecting the life and health safety of the patient.

[0036] The above are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A special injection for preparing low-dose insulin, characterized in that, include: The device comprises: a housing, detachably fixed to an insulin cartridge; a puncture needle, fixed to the housing, for puncturing the piston of the insulin cartridge and extending into the cartridge; a metering unit, connected to the puncture needle, for quantitatively sampling insulin from the cartridge via the puncture needle; and an injection needle, detachably connected to the metering unit, for injecting insulin into an infusion bag. The metering unit includes a pump wheel, a pump housing, and a handle. The pump housing is cylindrical, and the pump wheel is mounted on the pump... Inside the casing, a handle passes through the pump housing and is fixedly connected to the center of the pump wheel. The two ends of the pump housing are connected to the puncture needle and the injection needle, respectively. Rotating the handle allows insulin to be pumped out of the insulin cartridge in a measured amount through the pump wheel. The end of the pump housing connected to the injection needle has a locking part, and the injection needle has a locking element that engages with the locking part. The pump housing has a cavity containing alcohol, and the cavity is connected to an atomizing nozzle facing the injection needle. The locking part is an elastic locking part, and the locking element engages with the locking part against the elastic force. The opening and closing of the atomizing nozzle is linked to the locking part.

2. The small-dose insulin preparation needle according to claim 1, characterized in that: The inner diameter of the pump housing is larger than the inner diameter of the puncture needle, and the pump wheel can pump 0.01 ml of insulin from the insulin cartridge in one revolution.

3. The small-dose dedicated insulin preparation needle according to claim 2, characterized in that: The inner diameter of the puncture needle is larger than the inner diameter of the injection needle, and the length of the injection needle is 15-30mm.

4. A small-dose dedicated insulin injection according to any one of claims 1-3, characterized in that: The housing is a plastic-supported housing.

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