Guide Dilator System for Sequential Incision Enlargement
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Solution Overview
Problem
In lateral approach surgery, longer retractor blades face increased resistance and deflection due to greater distance to the surgical site, leading to tissue entrapment and complications in establishing a working channel, exacerbated by manufacturing variations in blade straightness.
Innovation Solution
A guide dilator system with slide connections between tissue engaging members and a guide dilator that restricts separation, allowing for sequential dilation of the incision and compensates for variations in blade straightness, facilitating easy and rapid insertion of retractor blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If longer retractor blades are used for lateral approach surgery, then the surgical site can be accessed from the side, but the blades experience greater deflection and resistance due to increased distance
Solution Approach 1:
A guide dilator is introduced as an intermediary tool that the retractor blades slide along during insertion. The guide dilator provides a rigid pathway that compensates for blade deflection and maintains proper blade alignment, allowing longer blades to be inserted without experiencing excessive deflection or resistance. The guide dilator acts as a mediator between the insertion site and the surgical target, enabling stable placement of the retractor blades.
2Ease of operation
If longer retractor blades are used, then more tissue can be retracted, but manufacturing variations in straightness are magnified, causing tissue entrapment
Solution Approach 1:
The guide dilator serves as a mediator that compensates for manufacturing variations in blade straightness. As the blades slide along the rigid guide dilator during insertion, any curvature or deviation in the blades is constrained and corrected by the guide dilator's straight pathway. This ensures that even blades with manufacturing variations maintain proper alignment and do not trap tissue, while still providing sufficient length for effective tissue retraction.
Solution Approach 2:
The guide dilator is inserted and positioned in advance before the retractor blades are fully deployed. This preliminary action establishes a correct insertion pathway and alignment reference, allowing the blades to be guided into position along a predetermined straight path. The preliminary placement of the guide dilator prevents tissue entrapment by ensuring proper blade alignment before the blades engage with surrounding tissues.
3Productivity
If retractor blades are advanced through an incision, then access to the surgical site is established, but tissues may lodge between the blades and dilator or creep into gaps
Solution Approach 1:
The guide dilator acts as an intermediary that prevents tissues from lodging between the retractor blades and the insertion pathway. By providing a rigid, smooth pathway, the guide dilator eliminates gaps and surfaces where tissues could become trapped. The guide dilator's presence maintains clear separation between the blades and surrounding tissues throughout the insertion process, preventing both tissue entrapment and tissue creep into gaps.
Solution Approach 2:
The guide dilator is preliminarily inserted to establish a clean, tissue-free pathway before the retractor blades are advanced. This preliminary action creates a protected insertion channel that prevents tissues from contacting the blades during advancement. The guide dilator's presence in advance ensures that tissues are pushed aside rather than becoming entangled with the blades or lodging in gaps, enabling efficient surgical access without tissue interference.
Data Source
AI summary
A retraction system and method are provided for retracting tissues surrounding a surgical site. In one aspect, a method including engaging slide connections between a guide dilator and a plurality of tissue engaging members and sequentially enlarging an incision using the guide dilator and the plurality of tissue engaging members. In another aspect, a method of inserting a plurality of tissue engaging members into an incision including fixing tip portions of the plurality of tissue engaging members in an insertion configuration, advancing the tip portions into an incision, and restricting movement of the tip portions away from the insertion configuration. A guide dilator system comprising an elongate body, a plurality of tissue engaging members, and slide connections between the elongate body and the tissue engaging members is also provided.