Vertebral Bone Cavity Creation with Curved Working End
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Solution Overview
Problem
Current methods for creating a path or cavity in vertebral bone to receive bone cement are inefficient, as they often require extensive tissue extraction or lack precise control over the creation of a curved configuration within the bone.
Innovation Solution
A device with a working end comprising concentrically arranged sleeves with radially offset slots or notches, allowing the working end to transition from a linear to a curved configuration through axial or rotational movement, facilitated by a handle mechanism, enabling precise cavity creation within vertebral bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to create a path or cavity in vertebral bone, then the cavity can be created, but extensive tissue extraction is required and precise control over curved configuration is lacking
Solution Approach 1:
The working end is divided into multiple concentric sleeves (first sleeve, second sleeve, third sleeve) that can independently translate relative to each other. This segmentation allows the bone to be displaced in a controlled, progressive manner rather than requiring extensive extraction, with each sleeve contributing to the overall curved configuration through its individual axial movement.
Solution Approach 2:
The device transitions from a static, rigid structure to a dynamic system where the working end can change configuration. By translating the first sleeve relative to the second sleeve axially, the working end moves from a linear configuration to a curved configuration, enabling precise control over the cavity shape without extensive tissue removal.
2Adaptability or versatility
If a rigid, linear tool is used to create a cavity in vertebral bone, then the tool structure is simple, but the ability to create curved configurations is limited
Solution Approach 1:
The device employs a nested structure with the first sleeve concentrically located within the second sleeve, and the third sleeve concentrically about the second sleeve. This nesting arrangement provides a compact design that achieves curved configuration capability without excessive complexity, as the sleeves share common spaces and are integrated into a unified structure.
Solution Approach 2:
The device adds axial translation capability to the traditional rotational movement. By translating the first sleeve relative to the second sleeve in the axial direction, the working end achieves curved configurations that cannot be obtained through rotation alone, adding a new dimension of control for creating precise cavity shapes in vertebral bone.
3Manufacturing precision
If the working end is made flexible to create curved configurations, then cavity creation precision is improved, but control over the working end position becomes more difficult
Solution Approach 1:
The working end is designed with controlled flexibility through the slotted or notched sleeves, allowing it to bend into curved configurations while maintaining structural integrity. The slots or notches in each sleeve permit bending in specific directions while maintaining rigidity in other directions, providing both flexibility for curved paths and controllability for precise positioning.
Solution Approach 2:
The sleeves are designed with slots or notches at specific locations to provide flexibility only where needed for creating the curved configuration, while maintaining rigidity in other areas for controlled positioning. This local quality approach allows the working end to be flexible in the bending direction but rigid enough for precise control during advancement through bone.
Data Source
AI summary
Methods and devices that displace bone or other hard tissue to create a cavity in the tissue. Where such methods and devices rely on a driving mechanism for providing moving of the device to form a profile that improves displacement of the tissue. These methods and devices also allow for creating a path or cavity in bone for insertion of bone cement or other filler to treat a fracture or other condition in the bone. The features relating to the methods and devices described herein can be applied in any region of bone or hard tissue where the tissue or bone is displaced to define a bore or cavity instead of being extracted from the body such as during a drilling or ablation procedure.