Retractor Extensions for Spinal Surgery Tissue Management
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Solution Overview
Problem
In surgical procedures, particularly spinal surgery, tissue encroachment into the incision site often obstructs the surgeon's view and can lead to post-operative complications, as existing retractors struggle to maintain a clear field due to irregular bony geometry and tissue creep under retractor blades.
Innovation Solution
A retractor extension with engagement members, such as projections and latches, that can be easily attached to various retractors to securely hold tissue away from the surgical site, providing a clear view by retracting tissue up to 20 mm from the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a retractor is inserted into the incision to hold tissue out of the way, then the surgical field is cleared and visibility is improved, but tissue encroaches under the retractor blades and obstructs the surgical site
Solution Approach 1:
The retractor system is divided into two functional components: the main retractor body that provides structural support and blade positioning, and separate extension members that actively engage and hold tissue away from the surgical site. This segmentation allows each component to perform its specialized function without interference.
Solution Approach 2:
Extension members act as intermediary elements between the retractor blades and the tissue. These extensions physically intercept tissue that would otherwise creep under the blades, transferring the tissue-holding function from the blades themselves to dedicated extension structures.
2Object-affected harmful factors
If the surgeon makes the incision as small as possible to minimize trauma, then patient trauma is reduced, but the surgical field becomes too narrow to maintain clear visibility
Solution Approach 1:
The extension members add a dimensional extension to the retractor system, projecting outward from the incision site to engage tissue at a distance. This allows the main retractor body to remain compact within the small incision while the extensions reach out to control tissue in the surrounding area.
3Illumination intensity
If the surgeon cuts or ablates tissue entering the surgical site to clear the field, then visibility is restored, but further trauma is caused to the patient and operation time is delayed
Solution Approach 1:
The extension members perform preliminary tissue retraction and positioning before the surgical procedure begins. By pre-engaging and holding tissue away from the surgical site, the extensions prevent tissue encroachment from occurring in the first place, eliminating the need for corrective cutting or ablation during surgery.
4Illumination intensity
If the retractor is spread open to provide clear view of the operating field, then surgical visibility is improved, but tissue creeps under the blades and blocks the surgical site
Solution Approach 1:
The retractor system is divided into two functional components: the main retractor body that provides structural support and blade positioning, and separate extension members that actively engage and hold tissue away from the surgical site. This segmentation allows each component to perform its specialized function without interference.
Solution Approach 2:
Extension members act as intermediary elements between the retractor blades and the tissue. These extensions physically intercept tissue that would otherwise creep under the blades, transferring the tissue-holding function from the blades themselves to dedicated extension structures.
Data Source
AI summary
A retractor extension is provided comprising a body having a distal end and a proximal end extending longitudinally from the distal end, the distal end of the body comprising a first set of engagement members comprising a first projection configured for attaching the body to a first end surface of the retractor, the proximal end of the body comprising a second set of engagement members comprising a second projection configured for attaching the body to a second end surface of the retractor. In some embodiments, the retractor extension holds tissue away from the surgical incision to enhance the surgeon's field of vision. Methods of attaching the retractor extension to the retractor are also described.