Brachytherapy Strand Assembly Device with Cartridge Lockout
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Solution Overview
Problem
Current brachytherapy systems lack flexibility in assembling strands of radioactive seeds, connectors, and spacers, often requiring standard configurations that do not accommodate the specific needs of patients, and lack features for detecting empty cartridges and preventing assembly errors.
Innovation Solution
A device with a carriage portion for receiving cartridges, a selector for choosing between radioactive seeds, non-radioactive connectors, and spacers, and an actuator to combine these elements into a strand, featuring a combiner and a lockout mechanism to prevent operation when a cartridge is empty, ensuring accurate and flexible assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard configuration cartridges are used, then manufacturing and storage are simplified, but flexibility for different treatment plans is reduced
Solution Approach 1:
The system divides brachytherapy elements into separate cartridges that can be independently selected and combined. Each cartridge contains a specific type of element (seeds, connectors, spacers) that can be mixed and matched to create custom strands, allowing flexibility without requiring complex individual cartridges for every possible configuration.
Solution Approach 2:
The device employs universal receptacles that can accept multiple types of cartridges (seeds, connectors, spacers) through a common selection mechanism. This multi-functional design allows a single device to accommodate various treatment plans by simply changing which cartridges are loaded into the receptacles, rather than requiring specialized cartridges for each element type.
2Productivity
If manual assembly methods are used, then detection of assembly errors is possible, but real-time operation and efficiency are reduced
Solution Approach 1:
The system incorporates feedback mechanisms where the controller monitors the assembly process and can detect when a cartridge is empty or when assembly errors occur. This real-time feedback allows the system to prevent incorrect assembly while maintaining efficient automated operation, resolving the contradiction between productivity and reliability.
3Productivity
If cartridges are designed to hold multiple elements, then assembly speed increases, but detection of empty cartridges becomes more difficult
Solution Approach 1:
The controller receives feedback signals from sensors that detect whether cartridges are empty. This feedback mechanism allows the system to maintain high assembly speed while reliably detecting when cartridges need replacement, as the controller is continuously monitored for empty cartridge conditions throughout the assembly process.
Data Source
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AI summary
A cartridge may include a housing configured to contain a plurality of like items and a track inside the housing The tiack extends in a first direction, and a plunger may be slidable along the track in the fust direction and configured to urge the items towaid a fust end of the housing The cartridge may include a gate attached to the housing. The gate may be movable between a first position preventing the items from being removed from the housing and a second position allowing one of the items to be removed from the housing The gate may be configured to remove the one item from being urged by the plunger