Radiolucent Surgical Retractor with Composite Structural Support
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Solution Overview
Problem
Conventional surgical retractors made of metal are radio-opaque, obstructing X-ray imaging during procedures like spinal surgeries, and existing solutions with integrated lighting add complexity and space requirements to the surgical site.
Innovation Solution
A radio-transparent retractor system formed of materials like thermoplastic or carbon-fiber composites, with integrated lighting features that do not obstruct imaging and maintain a clear surgical field without increasing bulk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metallic retractors are used, then structural strength and rigidity are sufficient, but the retractors are radio-opaque and obstruct X-ray imaging
Solution Approach 1:
The retractor is constructed from composite materials including a rigid foam core providing structural strength, surrounded by a radiolucent thermoplastic shell. This composite structure achieves the necessary mechanical properties while maintaining radio-transparency for clear X-ray imaging during spinal procedures.
Solution Approach 2:
A thin radiolucent thermoplastic shell envelops the rigid foam core, providing a smooth outer surface that is radio-transparent. This shell allows X-rays to pass through while protecting the internal structural core, resolving the contradiction between structural integrity and imaging clarity.
2Object-generated harmful factors
If retractors are made from radio-transparent materials, then X-ray imaging clarity is improved, but structural strength and rigidity are reduced
Solution Approach 1:
The dual-material construction combines radiolucent thermoplastic with rigid foam core. The thermoplastic provides radio-transparency while the foam core supplies structural strength, allowing the retractor to maintain both imaging compatibility and mechanical integrity throughout the surgical procedure.
Solution Approach 2:
The rigid foam core is nested within the radiolucent thermoplastic shell, creating a nested structure where the inner core provides structural support and the outer shell provides radio-transparency. This nested arrangement allows both materials to fulfill their respective functions without interfering with each other.
3Illumination intensity
If integrated lighting is added to the retractor, then surgical site illumination is improved, but device complexity and space requirements increase
Solution Approach 1:
The lighting component is merged with the retractor body, with the light source integrated into the retractor structure itself. This combination provides surgical illumination without requiring separate lighting equipment, reducing overall system complexity while maintaining effective lighting of the surgical site.
Solution Approach 2:
The retractor is designed to serve multiple functions: it provides tissue retraction, maintains structural integrity for spinal procedures, enables clear X-ray imaging through radio-transparency, and delivers surgical illumination through integrated lighting. This multi-functionality reduces the need for additional separate devices.
Data Source
AI summary
A self-supporting surgical retractor is provided for retracting soft tissue and anatomy at a spinal surgical site. The retractor includes a tubular base defining an upper rim and a lower rim and a working channel there between the upper and lower rims, in which the base and lower rim are sized and configured to be seated on adjacent vertebral bodies spanning an intervertebral space. At least two elongated legs are provided, each projecting from the upper rim and each including a fixation feature at a free end thereof. Each of the legs has a length sufficient for the fixation feature to be outside the body of a patient when the lower rim is seated on adjacent vertebral bodies of the patient. The retractor is formed of a radio-transparent or radio-lucent material.