Cannulated T-Handle Driver With Rotatable Interchangeable Shaft
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Solution Overview
Problem
Existing surgical drivers face challenges in providing additional torque at multiple angles with a variety of fasteners, especially in surgical environments where fluids make gripping difficult, leading to loose screw drilling and potential patient trauma.
Innovation Solution
A driver assembly with a rotatable and interchangeable cannulated driver shaft, featuring an elongated body with channels and a locking mechanism, allowing the cannulated driver shaft to be removably attached and rotated between configurations for improved torque and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle size is increased to provide additional gripping surface area, then the ease of operation is improved, but the device complexity increases and the driver shaft becomes difficult to manipulate for certain surgical sites
Solution Approach 1:
The driver is divided into separate components: an elongated body with channels, a cannulated hub, and a removable cannulated driver shaft. This segmentation allows the handle (elongated body) to be optimized for gripping while the shaft can be independently configured for different surgical sites and fastener types.
Solution Approach 2:
The locking mechanism is rotatable between a first configuration (locked) and a second configuration (unlocked), enabling the cannulated driver shaft to be rotated and repositioned relative to the elongated body. This dynamic capability allows the driver to adapt to various surgical angles and access difficult-to-reach areas.
2Stability of the object's composition
If the driver shaft is fixed to the handle, then the structural stability is improved, but the adaptability to drill a variety of different types of fasteners decreases
Solution Approach 1:
The cannulated driver shaft is designed with a universal interface through the locking mechanism that can accommodate different types of fasteners. The shaft can be interchanged to match different fastener requirements while maintaining a stable connection through the rotatable locking mechanism when engaged.
Solution Approach 2:
The locking mechanism transitions between locked and unlocked states, allowing the driver shaft to be securely fixed when needed for stable drilling, yet easily changed when different fastener types are required. This dynamic locking system provides both stability and versatility.
3Reliability
If additional torque is applied to drill screws firmly, then the reliability of screw fixation is improved, but the ease of operation decreases due to difficulty in gripping the driver in fluid conditions
Solution Approach 1:
By separating the gripping function (elongated body) from the torque transmission function (cannulated driver shaft), the design allows the user to grip the elongated body which can be optimized for fluid resistance, while the shaft efficiently transmits torque to the fastener.
Solution Approach 2:
The locking mechanism acts as an intermediary between the user's gripping action on the elongated body and the torque application to the fastener. It translates the rotational motion and force applied to the elongated body into effective torque transmission through the cannulated driver shaft to the fastener.
4Adaptability or versatility
If the driver shaft is made removable and rotatable, then the adaptability to multiple configurations is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is integrated within the elongated body structure, combining the locking function with the existing handle design. The first and second channels are incorporated into the elongated body, merging multiple functions into a unified structure that reduces overall complexity despite adding rotatable functionality.
Solution Approach 2:
The locking mechanism serves multiple functions: it secures the cannulated driver shaft in place, allows rotation between configurations, and provides a standardized interface for different shaft types. This multi-functionality justifies the added complexity by eliminating the need for multiple separate mechanisms.
Data Source
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AI summary
A driver assembly with a rotatable and interchangeable cannulated driver shaft for drilling a variety of fasteners. The driver assembly includes an elongated body having a proximal end and a distal end with a first channel extending from the distal end into the elongated body and a second channel extending from a first side of the elongated body into the elongated body. The driver assembly also includes a locking mechanism connected within the elongated body. The locking mechanism is rotatable between a first configuration and a second configuration. A cannulated driver shaft is removably attached to the locking mechanism and is rotatable between the first configuration and the second configuration via the locking mechanism.