Anesthesia Cart Keyless Entry Automatic Re-locking
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Solution Overview
Problem
Current anesthesia carts face challenges in providing quick and secure access to prescription medical items, particularly narcotics, as they require manual unlocking and relocking, which can delay access in emergencies and compromise security when the anesthesiologist is not present, lacking a sophisticated audit trail and automatic locking mechanisms.
Innovation Solution
An anesthesia cart equipped with electronically locking drawers, a personal computer or microprocessor board, a coded entry device, and an ultrasonic proximity sensor that automatically locks and unlocks based on the anesthesiologist's presence, allowing for quick access and secure storage of controlled substances with an audit trail of access history.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical lock with physical key is used, then security of controlled materials is improved, but access speed and ease of operation deteriorate
Solution Approach 1:
The patent replaces the mechanical key-lock system with an electronic access control system using biometric sensors (fingerprint, retina, or voice recognition) and electronic locks. This substitution eliminates the need for physical keys, enabling automated authentication and instant lock/unlock operations, thereby maintaining security while dramatically improving access speed.
Solution Approach 2:
The system implements self-service through automated biometric authentication. When the authorized user approaches the cart, the system automatically detects and verifies their identity using biometric sensors, then automatically unlocks the compartments without requiring manual key insertion or code entry. The cart also automatically re-locks when the user moves away, eliminating the need for manual re-locking.
2Reliability
If manual locking and unlocking is required, then security control is improved, but time consumption and productivity deteriorate
Solution Approach 1:
The system performs preliminary authentication actions automatically using pre-enrolled biometric data. The biometric sensors continuously monitor for the presence of the authorized user and verify identity before access is granted, eliminating the need for manual authentication steps during actual access events. This preliminary automated verification significantly reduces time consumption while maintaining security control.
Solution Approach 2:
The manual locking and unlocking process is replaced with an automated electronic system that uses biometric authentication to control electronic locks. The system automatically locks and unlocks compartments based on verified user identity, eliminating manual operations and reducing time consumption while maintaining or enhancing security control through more reliable biometric verification.
3Ease of operation
If a timer-based automatic re-locking system is used, then ease of operation is improved, but reliability deteriorates due to potential lockout during procedures
Solution Approach 1:
The system uses continuous feedback from biometric sensors to monitor the presence and identity of the authorized user. The electronic locks remain unlocked as long as the system detects the authorized user's biometric signature in proximity. When the user moves away beyond the detection range, the system receives feedback indicating absence and automatically re-locks the compartments. This feedback-based control eliminates the fixed timer issue, ensuring locks remain accessible during procedures while automatically securing when the user leaves.
4Device complexity
If key access system is used, then device complexity is reduced, but loss of information deteriorates due to lack of audit trail
Solution Approach 1:
The simple mechanical key system is replaced with an electronic access control system that inherently provides digital audit trails. The electronic system automatically records authentication events, access timestamps, and user identity information in digital memory or connected databases. This substitution increases device complexity but eliminates information loss by providing comprehensive, automatic recording of all access events without requiring additional manual logging procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures quicker access to medical items without the need for manual login, automatic relocking when the user is not present, and a comprehensive audit trail, eliminating the risk of timed relock issues during surgical procedures.
Implementation Method 1
utilizing an ultrasonic proximity sensor to automatically lock and unlock based on the anesthesiologist's presence
Data Source
AI summary
A controlled access anesthesia cart has at least one drawer or compartment for storing general-use anesthesia items, and at least one drawer or compartment for storing controlled substances, e.g., narcotics. A key card reader on the cart is sensitive to an authorization code to unlock the compartments in the cart for access. The anesthesiologist needs to enter a pass code for access to the controlled substances compartment(s). The compartments then remain unlocked so long as the anesthesiologist remains present. A sonic sensor, e.g., an ultrasonic rangefinder device, communicates with the computer of the cart, and when the anesthesiologist is outside a given beam volume in front of the cart, the cart automatically re-locks the compartments either immediately or after a predetermined short delay period.