Surgical Retractor with Elongate Protrusions for Tissue Engagement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical retractors lack elongate protrusions on the exterior faces of anatomy engaging members, leading to displacement from incisions or wounds under tissue pressure, especially when retracting muscle tissue.
Innovation Solution
The surgical retractor features elongate protrusions on the exterior faces of its anatomy engaging members, which engage with tissue to resist displacement and provide controlled retraction, with adjustable arm separation and material properties like polycarbonate for ease of movement and tissue observation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surgical retractors are used without elongate protrusions on the exterior faces of anatomy engaging members, then the structure is simpler and easier to manufacture, but the retractor is displaced from incisions or wounds under tissue pressure
Solution Approach 1:
The elongate protrusions are pre-formed on the exterior faces of the anatomy engaging members before insertion. These protrusions are positioned in advance to engage with tissue surfaces, creating preliminary mechanical interlocking that prevents displacement during retraction operations.
Solution Approach 2:
The elongate protrusions feature curved or rounded surfaces that conform to the natural contours of tissue. This curvature allows the protrusions to smoothly engage with tissue surfaces while distributing contact forces, enhancing grip without causing excessive stress concentration that would lead to tissue damage or retractor displacement.
2Strength
If elongate protrusions are added to the exterior faces of anatomy engaging members, then displacement under tissue pressure is resisted, but the device complexity increases
Solution Approach 1:
The exterior face of each anatomy engaging member is divided into multiple elongate protrusions rather than using a single large contact surface. This segmentation increases the total surface area for tissue engagement while distributing mechanical stresses across multiple discrete elements, enhancing overall strength without proportionally increasing complexity.
Solution Approach 2:
The elongate protrusions are strategically positioned on specific regions of the exterior faces where tissue contact is most critical. The protrusions have varying heights and spacing optimized for local tissue characteristics, providing enhanced pressure resistance precisely where needed while maintaining simpler structures in non-critical areas.
3Ease of operation
If the anatomy engaging members are made from materials like polycarbonate, then ease of movement and tissue observation are improved, but the material selection becomes more restricted
Solution Approach 1:
The material properties of the anatomy engaging members are optimized by selecting polycarbonate or similar polymers with specific mechanical parameters. These materials provide the right balance of flexibility for ease of movement during insertion and adjustment, while their optical transparency enables direct visualization of tissue condition without requiring additional imaging equipment.
Solution Approach 2:
The transparent or translucent nature of polycarbonate materials allows natural light transmission through the anatomy engaging members. This optical property enables surgeons to observe tissue color changes, blood flow, and other visual indicators of tissue health directly through the retractor components, eliminating the need for opaque materials that would block visual monitoring.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
The invention relates to a surgical retractor (10) comprising a support (12), first and second arms (14, 16) extending from a same side of the support, a first anatomy engaging member (42) having a first interior face (52) and a first exterior face (50), and a second anatomy engaging member (44) having a second interior face (52) and a second exterior face (50). The first anatomy engaging member (42) depends along its length from the first arm (14) whereby the first exterior face faces (50) away from the second anatomy engaging member (44). The second anatomy engaging member (44) depends along its length from the second arm (16) whereby the second exterior face (50) faces away from the first anatomy engaging member (42). Each of the first and second exterior faces (50) defines at least one elongate protrusion, the elongate protrusion extending transversely on the respective anatomy engaging member. The first and second arms (14, 16) are spaced apart from each other along the support (12).