Manufacturing method of safe transfusion system based on bubbling point pressure principle

Abstract

The invention relates to the technical field of medical appliances, in particular to a manufacturing method of a safe transfusion system based on a bubbling point pressure principle. The method of the invention is based on the bubbling point pressure principle, a liquor filtering medium which can block air from crossing a liquor filtering membrane to enter the pipeline of the transfusion system is selected, and the safety performance of automatically stopping the transfusion of the liquor by using the characteristics of the liquor filtering medium to prevent the air from entering the pipeline when the transfusion system is empty is achieved. On the basis, an exhaust tube penetrating into the inner chamber of a drop bucket is arranged in the drop bucket, and the exhaust tube is mainly characterized in that a filtering medium which exhausts air but does not discharge the liquor is arranged at the penetrating end of the exhaust tube, so that the transfusion system combined with the bubbling point principle can safely realize automatic exhaust truly, and achieve the effects of efficient and safe automatic exhaust and air separation.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a method for manufacturing a safety infusion set based on the principle of bubble point pressure. Background technique [0002] The existing infusion sets have deficiencies and risks in preventing air from entering the blood vessels to cause medical accidents and realizing exhaust gas before infusion simply and stably. Regarding the former, more than a thousand technical solutions that have been proposed are more concentratedly realized by using the method of stopping the infusion by blocking the floater. Such methods or products are complicated in terms of manufacturing process, cost or clinical use; According to the technical solution of the dripping funnel of the Chinese patent CN 88 2 02270U medical plastic infusion set, a dosing pipe is set on the shoulder of the dripping funnel, and it is proposed that it can be used as an exhaust gas and the liquid level in the dri...

AI Technical Summary

Problems solved by technology

[0002] Existing infusion sets have deficiencies and risks in preventing air from entering blood vessels to cause medical accidents and in achieving simple and stable exhaust before infusion

Regarding the former, more than a thousand technical solutions that have been proposed are more concentratedly realized by using the method of stopping the infusion by blocking the floater. Such methods or products are complicated in terms of manufacturing process, cost or clinical use; According to the technical solution of the dripping funnel of the Chinese patent CN 88 2 02270U medical plastic infusion set, a dosing pipe is set on the shoulder of the dripping funnel, and it is proposed that it can be used as an exhaust gas and the liquid level in the dripping funnel can be adjusted by manual opening and closing, which is a kind of In 2008, the Chinese patent application 200810071550.7 medical automatic venting venous infusion device technical proposal proposed to install one end in the drip funnel to extend into the middle of the inner cavity of the drip funnel, and the other end to cover and install an air filter membrane that exhausts and does not drain liquid. Chinese patent 200920277618.7, an automatic exhaust infusion set with similar technical solutions, or Chinese invention patent application 200910238574.1, an automatic exhaust infusion set, also proposed consistent technical solutions, and they have the common advantage that automatic exhaust can be realized to a certain extent, The disadvantage is that it is not compatible with the internationally accepted product type of piercer and drip funnel, and the exhaust time is relatively long due to the way of filling stop, especially when the exhaust operation still needs to be closed in advance, and then opened after completion , and then close the venipuncture, etc., the operation is still complicated, and the advertised automatic exhaust cannot be truly realized

For the three similar technical solutions such as the above-mentioned Chinese patent application 200810071550.7, one of its shortcomings is that it cannot be compatible with the product type of the internationally accepted piercer and dripping funnel. Chinese patent 200920270695.X has done a better However, its disadvantage is that it needs to be manually opened and closed to exhaust the dripping funnel. In addition to the advanced type, the practicality is the same as the dripping funnel of the above-mentioned Chinese patent CN 88 2 02270U medical plastic infusion set in 1988. The technical solution is no different

[0003] The closest to one of the solutions of the present invention in terms of type and appearance is the Chinese invention patent application 201010123045.X, a safe and bubble-free infusion set. Similar technical solutions, but the performance statement that claims to be "safe and bubble-free components" "can prevent blood backflow at the end of the infusion" (see paragraphs 0006, 0007 and 0008 of its instruction manual) does not clearly disclose the principle of its prevention, but from Its expression and inference combined with clinical experience or the common sense of the human body's own blood pressure, in order to "prevent blood backflow at the end of the infusion", it must be ensured that no matter how much liquid is left in the pipeline of the infusion set, it is in a positive pressure state and maintained A necessary prerequisite for a positive pressure state is that the liquid in the infusion set line is always in the infusion state, so it can be determined that its "safe bubble-free component" has no ability or need to block fluid or stop liquid infusion, said " The performance of "preventing blood backflow at the end of infusion" is achieved by slowing down the infusion speed or even achieving a small amount of infusion when the infusion of the medicinal solution is completed and before the infusion is replaced. Therefore, the disadvantage of the technical solution is also obvious, that is, the patient is a For living people, when the infusion drops are empty, once the patient moves his limbs habitually and the body position changes, causing the height change of the position of the venipuncture point of the human body, the infusion set based on gravity infusion, the position of the venipuncture point of the human body becomes higher, which acts on the infusion The gravity of the liquid in the infusion set is relatively smaller, and the blood will flow back immediately. It is impossible to prevent blood backflow. The negative pressure formed by the liquid pull-down will break through the multi-layer liquid medicine filter membrane and enter the pipeline of the infusion set. Neglect to check whether there is air, it is very easy to have malignant medical accidents

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