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Cartridge with high safety and low amount of residual liquid of pen type insulin syringe

A pen core and piston technology, applied in the field of medical devices, can solve the problem of excessive insulin, achieve high input-output ratio, accurate measurement and display, and improve safety

Active Publication Date: 2009-08-05
关和瑜 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to propose a method that can cooperate with the original pen-type insulin syringe, has high safety, is convenient to use, is simple to implement, and has a high input-output ratio, and solves the problem that the pen core has a large amount of residual insulin after use. problem, reduce waste

Method used

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  • Cartridge with high safety and low amount of residual liquid of pen type insulin syringe
  • Cartridge with high safety and low amount of residual liquid of pen type insulin syringe
  • Cartridge with high safety and low amount of residual liquid of pen type insulin syringe

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Experimental program
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Effect test

Embodiment 1

[0038] exist figure 2 In Zhongyuan’s insulin refill, in the remaining space formed by the refill bottle 1, bottle cap 3 and the original piston 2 at the end of the injection stroke, there are insulin residue 4 and an original glass ball with a diameter of 2.5 mm In the case of 5, it is filled with granular solid substances 6, and the alternative substances can be spherical substances with stable properties such as plastics, glass, and ceramics with a diameter less than 2.5 mm. For example, 10 glass balls with a diameter of 2.5 mm can replace about 6 units of liquid medicine, and 30 glass balls with a diameter of 1.5 mm have certain effects. When the specific gravity of the granular solid material is plastic, it mainly plays the role of replacing the insulin residual liquid when it is used up.

Embodiment 2

[0040] exist image 3 Among them, because substitutes use materials with high specific gravity such as glass and pottery, and can fully replace the original glass balls that play a role in mixing, the glass balls are therefore cancelled. In this example, the substitute is selected with low price and good performance glass microspheres. For example, 400 glass microspheres with a diameter of 0.8-1 mm or 600 glass beads with a diameter of 0.6-0.8 mm can replace about 12 units of drug solution.

Embodiment 3

[0042] exist Figure 4 In order to further reduce the amount of residual liquid, a new substitute disc 7 is added, and it is connected with the piston as a whole, so as to reduce the remaining space occupied by the liquid medicine and the glass microspheres. By adjusting the thickness of the wafer and the glass beads, the remaining space occupied by the liquid medicine and the glass beads can be controlled, and the way the push rod stroke ends or the end of the touch of the glass beads can also be controlled. In order to make the remaining amount correspond to the indication on the syringe and make it clearer, the disc can be made of eye-catching white or green. Under the limited conditions of the original pen-type insulin syringe, after experiments, the distance between the disc and the shoulder of the bottle is about 1 mm, the thickness of the disc is about 2 mm, and the diameter of the glass beads is less than 1 mm, so the effect is relatively good.

[0043] Experiment pur...

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Abstract

The invention belongs to the field of medical appliances, and relates to a suspension type refill of an insulin injection pen. In the prior art the injection pen uses a glass bead mixing method, which has a certain problems of safety hidden danger and much residual liquid. In the inventive method, a large amount of granulate solid materials replacing residual liquid and mixing uniformly the medicine liquid are still in the refill. The replacement materials have ability to intercept and capture the sedimentation insulin. The total amount of the replacement materials is less than residue space formed by a refill bottle, a bottle hood and termination stroke of a piston. The invention has the beneficial effect to eliminate the safety hidden danger and save 5% of the insulin, and has obvious effect.

Description

technical field [0001] The invention belongs to the field of medical devices and relates to a pen core for a pen type insulin syringe. Background technique [0002] At present, the known pen-type insulin syringe refill that has been used for more than 20 years still has about 20 units of insulin residual liquid after use, resulting in waste. When the suspension-type insulin cannot be mixed at the end, some unmixed insulin may still be injected, resulting in a safety risk of adverse consequences. [0003] As can be seen from the US4850966A patent announced by the United States on July 25, 1989, the raffinate problem existed from the beginning. This patent proposes a method of placing glass balls in the pen core in order to solve the many disadvantages of the suspension-type insulin 3ml pen core, which uses air bubbles to leave space, and shakes the pen core to make the liquid move and mix. . The embodiment of the method points out that without glass balls in the pen core, ...

Claims

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Application Information

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IPC IPC(8): A61J1/06A61M5/24
Inventor 关和瑜关绍雷
Owner 关和瑜
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