Rotating Retaining Flange for Secure Orthopaedic Device Engagement
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Solution Overview
Problem
Current orthopaedic surgical instruments lack an efficient mechanism to securely engage and manipulate medical devices within patient bones during joint arthroplasty procedures, particularly in securing prosthetic components like acetabular and femoral head components.
Innovation Solution
An orthopaedic surgical instrument featuring a rotatable retaining flange that can be positioned to align with or extend beyond the head of the instrument, allowing secure engagement with medical devices by matching the geometry of the device's socket and apertures, facilitated by a handle-operated mechanism that applies torsion force through an inner shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional orthopaedic surgical instrument without a rotatable retaining flange is used, then the instrument structure is simpler, but the instrument cannot securely engage and manipulate medical devices within patient bones
Solution Approach 1:
The retaining flange is designed to be rotatable relative to the head of the shaft, transitioning between a first position where it is aligned with the head and a second position where it extends beyond the head to engage the medical device. This dynamic configuration allows the instrument to adapt its engagement mechanism while maintaining a relatively simple overall structure.
2Manufacturing precision
If a rotatable retaining flange mechanism is added to secure medical devices, then the manipulation precision is improved, but the device complexity increases
Solution Approach 1:
The instrument is divided into distinct functional segments: a shaft with a head, a rotatable retaining flange coupled to the head, and a handle. The retaining flange itself is segmented with multiple tips that can selectively engage different portions of the medical device, allowing precise manipulation while keeping each segment's design relatively simple.
3Reliability
If the retaining flange is designed to rotate between two positions, then the locking mechanism is more reliable, but the ease of operation is reduced
Solution Approach 1:
The handle serves as an intermediary mechanism that facilitates the rotation of the retaining flange. By providing a dedicated handle for operation, the complex rotational engagement of the retaining flange with the medical device is simplified into a straightforward manual operation, maintaining ease of use while ensuring reliable locking.
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
Enables secure manipulation and rotation of medical devices within the bone, enhancing the precision and efficiency of joint replacement surgeries by providing a reliable locking mechanism that stabilizes the device during insertion and removal.
Implementation Method 1
The inner shaft may be configured to be twisted about a longitudinal axis extending the first end and the second end to apply a torsion force from the retaining flange to a side wall of the socket
Data Source
AI summary
An orthopaedic surgical instrument including a shaft including a head sized to be received in the socket of a medical device is disclosed. The orthopaedic surgical instrument includes a retaining flange that is rotatable relative to the head about an axis between a first position in which a tip of the retaining flange is aligned with the head and a second position in which the tip of the retaining flange is received in one of a number of apertures of the medical device when the head of the shaft is received in the socket of the medical device. A system and method including the orthopaedic surgical instrument are also disclosed.