Bone Injection Instrument for In Situ Polymer Hardening
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Solution Overview
Problem
There is no known appropriate instrument capable of preventing a patient with a femur fracture from experiencing a contralateral fracture, leading to a decreased standard of living due to difficulty or inability to walk.
Innovation Solution
An injection instrument with a cylindrical injector having holes that delivers a mixed solution of a first and second solution, which hardens upon mixing, to permeate and harden inside the bone, increasing its strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a curable polymer is used to repair bone, then bone strength is improved, but there is no appropriate instrument to prevent contralateral fracture
Solution Approach 1:
The injection device is divided into multiple functional components: a first injection needle for delivering the first curable polymer solution, a second injection needle for delivering the second curable polymer solution, and a mixing chamber. This segmentation allows the device to perform multiple functions (preventing contralateral fracture and treating existing fracture) while maintaining the chemical properties needed for bone strengthening
Solution Approach 2:
The injection device is designed as a universal instrument that can both prevent contralateral fracture by injecting hardened polymer into the unaffected bone and treat existing fracture by injecting the same polymer into the fractured area. The device integrates multiple injection needles and mixing mechanisms to accomplish both preventive and therapeutic functions with a single instrument
2Strength
If a mixed solution is injected to permeate bone, then bone strength increases, but the complexity of the injection device increases
Solution Approach 1:
The injection device employs a nested structure where the first and second injection needles are positioned concentrically or adjacently, with mixing chambers nested within the needle structure. The mixed solution flows through integrated channels that are embedded within the device body, reducing overall structural complexity while maintaining the ability to deliver and mix two separate polymer solutions
Solution Approach 2:
The device merges the functions of two separate injection systems into a single integrated unit. The first and second curable polymer solutions are mixed within integrated mixing chambers that are combined with the injection mechanism, allowing simultaneous or sequential delivery of both solutions through a unified device structure rather than requiring two separate injection systems
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
The injection instrument effectively increases bone strength, reducing the risk of contralateral fractures and maintaining the patient's quality of life by enhancing bone integrity.
Implementation Method 1
a mixed solution of a first and second solution, which hardens upon mixing
Data Source
Figure 1~2
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AI summary
An injection instrument (1) includes: an injector (20) that is a cylindrical body having one or more holes, wherein the injector receives a flow of a mixed solution, which is a mixture of a first solution and a second solution that hardens by being mixed with the first solution, in a state in which the injector is inserted in an opening formed in a bone of a target, and the injector causes the mixed solution received to flow out of the injector (20) from the one or more holes to permeate inside of the bone and harden.