Injection pump pumpback method and device

Abstract

The invention relates to an injection pump pumpback method. The method is completed by controlling a computer system through computer program instructions by building a function module framework, and the computer program instructions are stored into a computer readable storage medium. According to current pressure intensity inside a pipe of an injector to be tested and the length of a hose for connecting the injector to be tested with an intravenous needle, the pumpback amount is calculated, when the injector is blocked, the influence caused by the length of the hose is sufficiently considered when the pumpback amount is calculated, and the pumpback amount is calculated more accurately, so that the pressure intensity of the hose and the injector are accurately released, and the problem that the relations between pressure sensor input values and the pressure intensity inside the hose and the injector are different on the two conditions that a push rod pushes an injection handle and the push rod pulls the injection handle is solved. In addition, in order to ensure that the pressure intensity inside the injector can be more accurately released during pumpback, and a processor calculates the pumpback compensation amount according to displacement of the injector, and controls the injection pump to perform pumpback compensation on the basis of the compensation amount.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a syringe pump withdrawal method. The method is completed by establishing a functional module framework and controlling a computer system by computer program instructions, and these computer program instructions are stored in a computer-readable storage medium. Background technique [0002] At present, most syringe pumps on the market are equipped with an injection pressure detection function. When the syringe placed on the syringe pump has excessive pressure or abnormality during the injection process, the syringe pump must stop the injection, because the injection at this time may cause serious harm to the patient. cause discomfort or even harm. With the advancement of technology and the improvement of customer demand, most of the syringe pumps in recent years have realized the withdrawal function after the pipeline is blocked, so as to achieve the purpose of releasing the pressu...

AI Technical Summary

Problems solved by technology

However, because the pressure sensor is installed at the end of the push rod, and the push rod pushes the injection handle and the push rod pulls the injection handle, the relationship between the input value of the pressure sensor and the pressure inside the syringe is different in these two cases, so only the pressure sensor detects the release The pressure inside the syringe is inaccurate, and it is difficult to meet the needs of actual use

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