Integrated Trocar and Cannula Device for Single-Use Safety
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Solution Overview
Problem
Current surgical devices require separate tools for piercing and injection/sampling operations, leading to increased costs, bulkiness, and risks of needle pricking incidents during handling and disposal.
Innovation Solution
A combined device with a handle supporting a rigid needle trocar and a flexible cannula needle, enclosed in a protective tube, allowing for single sterilization and compact packaging, with a sealing cap to protect the needles during operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate tools (trocar and cannula) are used for piercing and injection operations, then each tool can be optimized for its specific function, but the device complexity increases, packaging becomes bulky, and handling becomes more difficult
Solution Approach 1:
The patent combines the trocar (piercing needle) and cannula (injection needle) into a single integrated device. The trocar is housed within the cannula assembly, allowing both piercing and injection functions to be performed with one tool. This merging eliminates the need for separate packaging, sterilization, and handling of two distinct tools while maintaining both functions.
Solution Approach 2:
The integrated device serves multiple functions: the outer cannula acts as both the injection needle and the protective housing for the trocar. The inner trocar provides the piercing function. This multi-functionality allows a single device to replace two separate tools, reducing complexity and improving handling efficiency.
2Reliability
If separate tools are used, then each tool can be independently sterilized and packaged, but the packaging becomes bulky and costs increase
Solution Approach 1:
The trocar and cannula are packaged together in a single sterile container, eliminating the need for separate packaging. The integrated design allows both components to be sterilized and packaged as one unit, significantly reducing the volume required for storage and transport while maintaining sterilization assurance.
3Ease of manufacture
If separate tools are used, then each tool can be prepared independently, but the preparation time and manipulation steps increase
Solution Approach 1:
The integrated device requires only a single unpacking and preparation step. The trocar remains housed within the cannula during storage and transport, and both are ready for use simultaneously once the package is opened. This eliminates the sequential preparation steps required for separate tools, reducing time loss during medical procedures.
4Productivity
If the trocar is refitted in open air after use, then the tool can be reused, but the risk of needle pricking incidents increases
Solution Approach 1:
The trocar is nested within the cannula housing, which acts as a protective sheath. After the piercing operation, the trocar remains contained within the cannula, preventing accidental exposures during handling, disposal, or refitting. This nested configuration maintains safety while allowing tool reuse.
Data Source
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AI summary
Device for a medical procedure, comprising a handle (2) axially supporting, at one end, a rigid needle (4) which forms a trocar provided to pierce the skin, the device being equipped with a sealing stopper (12) that covers at least the rigid needle, this device having, at the other end, an elongate protective tube (8) mounted on the handle (2), containing a needle forming a cannula (14).