Osteotomy Spreader and Bridge for Bone Plate Access
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Solution Overview
Problem
Existing surgical procedures for osteotomies lack effective devices for maintaining the spatial relationship between separated bone surfaces and providing unimpeded access for bone plate placement during osteotomy.
Innovation Solution
A kit comprising a spreading device with a hand grip and hammering region, a bridging device with an open central volume, and a bone plate, allowing for securement and temporary maintenance of the osteotomy, with adjustable angle pin compression/distraction capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spreading device is inserted into the osteotomy to maintain separation of bone surfaces, then the spatial relationship between bone surfaces is maintained, but the device occupies space that could be used for surgical instrument access
Solution Approach 1:
The spreading device is designed with a collapsible structure that allows it to be nested within itself or within the bridging device. The spreading members can be collapsed into a compact configuration that fits within the central volume of the bridging device, enabling both devices to coexist in the limited surgical space while maintaining their respective functions.
Solution Approach 2:
The spreading device features dynamic, adjustable spreading members that can be positioned and locked at various separation distances. This allows the device to adapt to different surgical requirements and be compacted when not actively spreading, optimizing space utilization during different phases of the surgical procedure.
2Ease of operation
If a bridging device is used to hold open the anatomy and provide access, then surgical instrument access is improved, but the device lacks effective means for maintaining the spatial relationship between separated bone surfaces
Solution Approach 1:
The bridging device and spreading device are designed to work together as an integrated system. The bridging device provides the structural framework and access pathway, while the spreading device inserts through the bridging device's central volume to perform the actual bone surface separation. Together, they accomplish both functions of maintaining spatial relationship and providing surgical access.
3Ease of operation
If the spreading device is made compact for insertion, then ease of insertion is improved, but the spreading capacity is reduced
Solution Approach 1:
The spreading device is divided into multiple independent spreading members that can be collapsed together for insertion and then separated to provide spreading force. Each member can be individually positioned and locked, allowing the device to transition from a compact insertion configuration to a fully expanded spreading configuration with sufficient force capacity.
Data Source
AI summary
Methods and apparatus for performing an osteotomy. One embodiment includes a kit comprising a bone plate, a bridging device, and a spreading device. The bridge is configured to hold open the incision in the bone, whether the spreading device is inserted into the bone, or the bone plate is attached to the bone. The spreading device preferably includes a scissors-type mechanism for spreading two wedge-shaped members apart, contemplating both pivotal and displacement movements of one wedging member relative to another wedging member. The spring device preferably includes an ergonomic grip for the hand of the physician, and a hammering surface useful in inserting the spreading device into the incision.