Antibiotic Pin Array for High-Throughput Bacterial Susceptibility Testing
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Solution Overview
Problem
The Kirby-Bauer disc diffusion test for antibiotic screening is inefficient due to laborious and error-prone manual dispensing of drug discs, requiring additional laboratory space and expensive dispensers, and limited throughput.
Innovation Solution
The use of pin array devices that allow simultaneous application of antibiotic compositions to bacteria cultures using pre-loaded pins, eliminating the need for manual dispensing and enabling high-throughput parallel processing without repetitive pipetting or liquid handling robotics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual dispensing of drug discs is used, then the Kirby-Bauer test can be performed, but the process becomes laborious, time-consuming and error-prone
Solution Approach 1:
The patent combines multiple drug disc dispensing operations into a single automated dispenser unit that can hold and dispense multiple different antibiotic discs simultaneously. This merging of functions eliminates the need for manual handling of individual discs and reduces the time required for the dispensing process while maintaining accuracy.
Solution Approach 2:
The automated dispenser is designed to perform the dispensing operation autonomously without requiring manual intervention for each disc placement. The device automatically retrieves, positions, and applies the correct antibiotic discs to the agar plate based on pre-programmed sequences, making the system self-sufficient for the dispensing task.
2Productivity
If automated dispensers are used, then dispensing efficiency improves, but the cost increases and additional laboratory space is required
Solution Approach 1:
The automated dispenser is designed as a multi-functional device that can handle multiple types of antibiotic discs and perform various dispensing patterns. This universal design allows a single device to replace multiple specialized tools, improving productivity without proportionally increasing cost or space requirements.
Solution Approach 2:
The dispenser system is divided into modular components including a disc storage module, a retrieval mechanism, and a placement mechanism. This segmentation allows for easier maintenance, reduced overall device complexity, and flexible configuration based on specific laboratory needs, thereby improving productivity without excessive cost increases.
3Quantity of substance
If more drug discs need to be dispensed, then the screening capacity increases, but manual handling becomes more error-prone
Solution Approach 1:
The automated dispenser incorporates feedback mechanisms such as sensors and control systems that monitor the dispensing process in real-time. The system can detect and correct positioning errors, track the number of discs dispensed, and verify proper placement, thereby maintaining high reliability even when testing large numbers of different antibiotics.
Solution Approach 2:
The patent replaces manual mechanical handling of drug discs with an automated mechanical system controlled by electronic programming. This substitution eliminates human error in disc selection and placement while enabling the systematic testing of numerous antibiotics with consistent precision and reliability.
Data Source
AI summary
Described herein are reagent loading devices configured to simultaneously deliver one or more test agents (e.g., antibiotics) to a sample such as a bacterial culture without having to individually deliver the test agents. These devices allow high throughput parallel processes without repetitive pipetting or liquid handling robotics. Also described herein are kits and systems for chemical or biological assays.