A kind of automatic preflushing method of medical syringe pump

Abstract

The invention discloses an automatic prefilling method for a medical injection pump and relates to the technical field of medical devices. According to the method, the minimum thrust F0 or the minimum pressure P0 of an injector and the maximum clearance L0 or the pulse total number C0 of the injection pump are measured in advance; in the starting operation initial stage of the injection pump, the pulse number C1 of a stepping motor is measured, or the quasi-movement distance L1 of a push rod is calculated; the thrust F1 or the pressure P1 of the push rod of the injection pump to the injector is detected; and according to the magnitude relationship between C1 and C0 or L1 and L0, and between F1 and F0 or P1 and P0, whether compressing of the mechanical clearance of the injection pump is completed or not is judged, accordingly the operation speed of the injection pump is modified, and the automatic prefilling procedure is completed. The manual prefilling operation process is omitted, the operation procedure of the injection pump is simplified, the prefilling time is shortened, medicine liquid can be injected into a patient timely, the using efficiency of the injection pump is improved, and medicine waste is further reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an automatic preflushing method of a medical syringe pump. Background technique [0002] The medical syringe pump is driven by a stepping motor to drive the push rod to push the syringe, which controls the speed of the stepping motor, and then controls the speed of the drug injected into the patient's body; it usually runs at a constant speed. [0003] The medical syringe pump consists of single-chip microcomputer, stepping motor, gear, lead screw, clutch mechanism, push rod and other components, which work with the syringe; there is an objective mechanical gap between the mechanical parts (such as between the stepping motor and the gear, between the gear and the gear) Between the gear and the lead screw, between the clutch mechanism and the lead screw, between the lead screw and the bracket, between the push rod and the syringe, between the syringe jacket and the card sl...

AI Technical Summary

Problems solved by technology

[0007] During the above series of complex operations, it is necessary to observe the liquid medicine flowing out of the needle twice. Therefore, the preflushing operation mixed in the overall operation process will often be ignored or forgotten

Especially in the case of continuous injection, only the syringe needs to be replaced, and the tubing and needle are not replaced, so there is no need to pull out the needle. In this case, the pre-flushing process of the syringe pump is not easy to judge, and it is easy to cause waste of drugs.

[0008] Therefore, the existing prefilling method of the syringe pump needs to observe the medicine flowing out of the needle twice, resulting in waste of medicine, and in some cases, manual prefilling is difficult to operate and is easily ignored or forgotten

If the manual preflushing operation is not performed, it will cause the syringe pump to idle for a long period of time (such as 0.5-1 hour) in the early stage of operation due to the compression mechanical gap, and the liquid medicine cannot be injected into the patient in time, delaying the therapeutic effect and delaying the condition

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