An infusion pump capable of accurate infusion

By synchronously acquiring motor stepping displacement and pipeline pressure information in the infusion pump, outputting a micro-calibration pulse sequence and updating the unit stepping displacement parameter, the problem of cumulative dosage deviation caused by consumable aging during long-term infusion is solved, realizing accurate infusion and safety assessment of the infusion pump.

CN122182907APending Publication Date: 2026-06-12安康市质量技术检验检测中心
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
安康市质量技术检验检测中心
Filing Date
2026-03-13
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing infusion pumps have difficulty converging the cumulative dose deviation caused by consumable aging and parameter drift during long-term infusion. They lack a reliable characterization of the degree of consumable drift, and the control strategy switching relies on empirical thresholds, making it difficult to form a calculable trade-off boundary between accuracy and safety.

Method used

Within a preset sampling period, the infusion pump motor step displacement, motor current, and pipeline pressure information are collected synchronously to generate an operation observation record. Under certain conditions, a micro-calibration pulse sequence is output. Based on the calibration observation record, the unit step displacement parameter and uncertainty are updated, and a safety assessment quantity is output in combination with the uncertainty to support strategy switching.

Benefits of technology

By integrating online calibration and safety assessment, misjudgments caused by single signal drift are reduced, the accuracy and safety of long-term infusion are improved, the reliance on manual calibration is reduced, the time for drift detection and correction is shortened, and the traceability and reliable quantification of dosage are achieved.

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Abstract

The application discloses an infusion pump capable of accurate infusion. A controller collects motor step displacement information and corresponding motor current information in a preset sampling period, and synchronously collects infusion pipeline pressure information, generates operation observation records and updates consumable use states; when the consumable use states meet a preset insertion interval or the operation observation records meet a calibration trigger condition, a trace calibration pulse sequence is outputted without changing a target infusion setting, corresponding current responses and pressure responses are recorded to generate calibration observation records; based on the calibration observation records, unit step displacement parameters are updated according to a recursive update rule, and an uncertainty is generated; the target dose is converted into a step output instruction according to the updated unit step displacement parameters, and a safety evaluation quantity is generated in combination with the uncertainty to support control strategy switching. The method can correct the displacement drift caused by the wear and aging of the consumables online and quantify the reliability, and improves the dose consistency and operation safety of long-term infusion.
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Citation Information

Patent Citations

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