Developing an Automated, Continuous Counting Inventory Module for Medication Management and Drug Diversion Prevention

Abstract

PharmAccount is developing an innovative module that integrates continuous medication counting into medication management systems like the BD Pyxis™ MedStation to address inefficiencies and vulnerabilities in hospital medication management. Hospitals face challenges in maintaining accurate medication inventory, preventing drug diversion, and reducing administrative burdens on nursing staff. The reliance on manual blind counts is time-consuming, error-prone, and diverts valuable resources from patient care. With the global medication management system market projected to grow at 8.8% annually through 2030, there is a clear demand for solutions that improve inventory accuracy, regulatory compliance, and security.

Our module features a durable, sterilizable plastic housing with a load cell that converts analog force signals into digital weight measurements. It provides real-time updates and automated alerts when medication is added or removed, with transactions detected and processed through integrated software. The software monitors weight changes when the lid is opened or closed, automatically detecting inconsistencies. The prototype utilizes 3D-printed PLA for the structural components, a load cell for weight measurement, and a 24-bit analog-to-digital converter to process data. All components are assembled on a breadboard with an STM32 microcontroller for system control. A graphical user interface allows users to log in and process transactions. Validation and verification of the prototype confirmed its accuracy in determining medication count based on weight.

PharmAccount’s solution meets the clinical need for accurate and secure medication management while aligning with hospitals’ demands for cost-effective, scalable technology that prioritizes patient safety and operational efficiency.

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