Slotted Retractor Tube for Spinal Instrument Maneuverability
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Solution Overview
Problem
Existing tubular retractor systems in minimally invasive surgery face limitations in maneuverability and anatomical alignment, leading to issues like tissue creep and restricted instrument placement during spinal procedures.
Innovation Solution
A retractor tube design featuring a slotted tube body with longitudinal and lateral window slots, a curved distal end, and a connection arm that allows for unimpeded instrument maneuverability and improved anatomical placement, preventing tissue creep and enhancing surgical access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a solid tubular retractor design is used, then structural strength is maintained, but instrument maneuverability and placement are restricted
Solution Approach 1:
The tubular retractor body is segmented with multiple slots (full length slot, lateral window slots, transverse passage) that divide the solid structure into open sections. These slots allow surgical instruments to pass through and maneuver within the retractor, providing unimpeded access to the surgical site while maintaining the overall tubular structure for strength and containment.
2Manufacturing precision
If a flush distal end design is used, then manufacturing simplicity is maintained, but anatomical alignment accuracy deteriorates and tissue creep occurs
Solution Approach 1:
The distal end of the tubular retractor is formed with a curved angular cut instead of a flat flush surface. This curved configuration allows the retractor to conform to the natural curvature of anatomical structures (such as the spine), improving anatomical alignment accuracy and preventing tissue creep by distributing pressure along a curved surface rather than concentrating it at a single flat interface.
3Adaptability or versatility
If multiple slots and openings are added to improve instrument access, then surgical versatility is enhanced, but structural integrity may be compromised
Solution Approach 1:
Different regions of the tubular retractor are given different qualities through strategically placed slots and openings. The full length slot provides primary instrument access, lateral window slots provide secondary access points, and a transverse passage allows instrument crossing. Each opening is positioned and sized to provide specific surgical functions while the remaining solid material maintains structural integrity. The connection arm with its own slots provides additional localized access without compromising the main tube strength.
Data Source
AI summary
A retractor tube device has a retractor tube having a slotted tube body with a proximal end and a distal end. The slotted tube body has a full slot extending longitudinally through the distal and proximal ends. The slotted tube body has two opposing lateral window slots at the distal end. Each window slot is positioned on the slotted tube body spaced apart by the full slot. The two opposing lateral window slots are aligned forming a passage crossing through a center of the slotted tube body transverse to a longitudinal axis of the slotted tube body. The full slot is configured to provide unimpeded instrument maneuverability for instrument placement and reach during a surgical procedure. The two opposing lateral window slots are configured to allow for additional instrument placement and reach during the surgical procedure.