Suture Delivery Device Tissue Compression Stabilization
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Solution Overview
Problem
Existing laparoscopic port-site closure devices face challenges such as rotation, tilting, and sliding during suture needle insertion, leading to suboptimal tissue bite and increased operator skill requirements due to instability and inaccurate suture placement.
Innovation Solution
A suture delivery device with a handle and suture passer that compresses surrounding tissue to stabilize the device, ensuring reproducible suture placement by compressing tissue between a slider and catcher, thereby preventing rotation and sliding, and featuring telescoping needle tracks and automatic suture release mechanisms for efficient closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a suture delivery device is inserted into a wound track for port-site closure, then the device can deliver sutures to close the incision, but the device may rotate, tilt, and slide downward during needle insertion, resulting in suboptimal suture placement and reduced tissue bite
Solution Approach 1:
The device engages the peritoneum before needle insertion to establish a stable reference point. This preliminary engagement prevents rotation, tilting, and sliding during subsequent suture delivery, ensuring accurate and reproducible suture placement at the desired depth in the muscle/fascia layers
Solution Approach 2:
The device uses the peritoneum itself as a reference point and anchoring surface. By engaging the peritoneum, the device creates its own stable platform without requiring external stabilization, allowing consistent needle entry points and suture placement across multiple insertions
2Ease of operation
If the device is not engaged against the peritoneum due to downward sliding, then the device may be easier to insert, but the needle entry point into muscle/fascia layers will be lower than intended and reduce tissue bite
Solution Approach 1:
The device is configured to engage the peritoneum as a preliminary step before needle insertion. This engagement establishes the correct depth and position, ensuring that subsequent needle entries occur at the intended location in the muscle/fascia layers with adequate tissue bite
Solution Approach 2:
The peritoneum serves as an intermediary reference layer between the device and the target muscle/fascia layers. By using the peritoneum as an intermediate reference point, the device achieves consistent and accurate needle entry points without requiring direct measurement or complex positioning mechanisms
Data Source
Figure 1A~1B
Figure 2A~3
Figure 4A~4C
AI summary
Systems are provided for delivering a suture to close a surgical opening. An elongated deployment member may have at its distal end a retracted counterforce member. The counterforce member may be inserted into the surgical opening and deployed to resist being withdrawn from the opening. A compression member may be slid down the elongated member to compress the tissue to be sutured against the counterforce member. Suture passers loaded with suture ends may be passed through needle tubes within the elongated member to emerge from the elongated member and pierce the tissue to be sutured, then deposit the suture ends with a suture catcher. The suture passers may be withdrawn, leaving the suture ends. The suture catcher may be retracted, retaining the suture ends and the device - elongated member, retracted suture catcher, and retained suture end - may be withdrawn from the surgical opening. The suture may then be completed.