Intramedullary Nail Coil Nesting for Bone Distraction
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Solution Overview
Problem
Existing intramedullary nails for distracting long bones face limitations in energy transmission performance, efficiency, space occupation, and require external reception antennas, which complicate surgical procedures and bone fixation.
Innovation Solution
The intramedullary nail design features a first and second tube that are axially displaceable, a locking opening for secure bone fixation, and a coil within the first tube for efficient energy transmission from an external primary coil, allowing for high energy transmission performance and efficient energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an intramedullary nail uses known reception antennas disposed within or outside the housing, then energy transmission can be achieved, but the energy transmission performance and efficiency are limited
Solution Approach 1:
The reception coil is integrated within the intramedullary nail housing, with the coil area specifically designed to receive electromagnetic energy from an external primary coil. The reception antenna is nested within the housing structure rather than being disposed outside, improving both energy transmission performance and efficiency while maintaining compact design
2Use of energy by moving object
If known reception antennas are used in the intramedullary nail, then energy transmission is possible, but more space is required and the nail cannot be implanted near joints
Solution Approach 1:
The reception coil is nested within the intramedullary nail housing, utilizing the existing structural space rather than requiring additional external components. This integration allows the nail to be implanted in confined spaces near joints while maintaining full energy transmission capability
Solution Approach 2:
The coil is arranged in a specific coil area within the housing, utilizing the internal three-dimensional space of the nail structure. This spatial arrangement optimizes energy reception while minimizing the overall volume occupied by the implant
3Use of energy by moving object
If external feed lines and antennas are used, then energy transmission can be achieved, but surgical effort and complexity increase
Solution Approach 1:
The reception antenna is extracted from external placement and integrated directly into the intramedullary nail housing. This eliminates the need for external feed lines and separate antenna components, thereby reducing surgical complexity while maintaining energy transmission functionality
Solution Approach 2:
The reception coil is merged with the intramedullary nail housing to form an integrated unit. This combination eliminates the need for separate external components and feed lines, simplifying both the device structure and the surgical implantation procedure
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
This design enables high energy transmission performance with minimal space occupation, allowing for reliable fixation in bones and reduced surgical effort, while eliminating the need for external feed lines and antennas.
Implementation Method 1
a coil (11), which is disposed in a coil area of the first tube (3) between the first locking opening (7) and the second tube (5)
Data Source
AI summary
An intramedullary nail for distracting a long bone, comprising a first tube extending in an axial direction of the intramedullary nail, a second tube extending in an axial direction of the intramedullary nail, which is coupled with the first tube to be axially displaceable within one another, a first locking opening in an end area of the first tube facing away from the second tube, and a coil, which is disposed in a coil area of the first tube between the first locking opening and the second tube.