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Views: 0 Author: Site Editor Publish Time: 2026-07-06 Origin: Site
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The suture-assisted traction technique is a minimally invasive method for closing lower limb skin defects using progressive tension sutures (PDS) with or without Kirschner wires and cable ties. It gradually reduces wound tension and allows secondary closure of complex soft-tissue defects without the need for flaps or skin grafts in selected cases.
Lower limb wound closure remains a major challenge in orthopedic and trauma surgery. It is commonly encountered in open injuries, post-operative wounds after Pilon fracture fixation, and fasciotomy wounds following compartment syndrome.
Traditional reconstruction strategies such as vacuum sealing drainage (VSD), split-thickness skin grafting, and flap coverage are widely used. However, these techniques may be associated with donor site morbidity, graft failure, higher cost, and increased surgical complexity.
To address these limitations, the team from Jishuitan Hospital Guizhou Hospital led by Chao Feng introduced a simplified suture-assisted traction closure technique combining PDS sutures with Kirschner wire and cable tie traction systems, aiming to provide a low-cost and effective alternative for selected lower limb wounds.
This technique is based on a simple biomechanical principle:
gradual reduction of wound tension allows progressive approximation of skin edges without acute ischemic overload.
It is mainly suitable for:
Post-fasciotomy wounds (e.g., compartment syndrome)
Post-traumatic swelling wounds (e.g., Pilon fracture surgery)
Delayed primary closure cases
Wounds without severe infection or necrotic tissue
The method is divided into two strategies depending on wound characteristics:
Low-tension wounds: direct progressive PDS suture closure
High-tension or large defects: combined PDS + Kirschner wire + cable tie traction system
In wounds without significant skin loss, closure is limited mainly by swelling and soft tissue tension rather than true tissue deficiency.
A 2-0 polydioxanone (PDS) suture is placed in a continuous or interrupted pattern across the wound edges. The sutures act as a dynamic tension system that can be gradually tightened during dressing changes.
Initial intraoperative approximation is performed without excessive tension
Sutures are left long enough to allow postoperative adjustment
During dressing changes, sutures are gradually tightened
Wound edges slowly approximate over time until secondary closure is achieved
This method is particularly effective in:
Fasciotomy wounds after decompression
Swelling-related surgical gaps
Soft tissue expansion cases following fracture fixation
▲ Procedural illustration of suture traction‑extension technique: skin traction with a single PDS suture.
For larger or high-tension wounds, simple suturing may cut through fragile skin edges. In these cases, a mechanical traction support system is required.
Two treatment strategies are selected based on wound morphology:
Wound length-to-width ratio > 3: PDS suture alone may be sufficient
Wound length-to-width ratio < 3: combined traction system is recommended
Step 1: Debridement and Preparation
Complete wound debridement and hemostasis
Release scar tissue from deep fascia
Temporary interrupted sutures are placed for provisional edge alignment
Step 2: Kirschner Wire Placement
A 2.0 mm Kirschner wire is pre-bent into a gentle arc
Inserted parallel to the wound margin, approximately 1.5 cm from the skin edge
The wire passes subcutaneously from one side to the other
Both ends are bent to form stable loops
Step 3: Cable Tie Traction System
A medical-grade nylon cable tie is passed through the Kirschner wire loops
Gradual tightening is performed to reduce wound width
This creates a controlled, evenly distributed tension system across the wound
Step 4: PDS Suture Reinforcement
Two 2-0 PDS sutures are placed from both wound edges toward the center
Sutures pass over the Kirschner wire system
Stitch spacing is approximately 1.5 cm
Final knots are secured at the center of the wound
This multi-layer tension system distributes force evenly and minimizes local skin necrosis.
▲ Combined skin traction with PDS suture, Kirschner wire, and nylon cable tie.
In large or stiff wounds, additional measures may be required:
Small parallel relaxing incisions along wound edges
Incremental skin mobilization to reduce tension
Avoidance of excessive acute closure force
Compared with traditional reconstructive methods, this technique offers several advantages:
No need for flap reconstruction in selected cases
Reduced donor site morbidity
Lower treatment cost
Gradual, physiologic wound closure
Reduced risk of skin edge necrosis
Simple and reproducible in resource-limited settings
Suitable for staged outpatient management
Despite its advantages, the technique has limitations:
Not suitable for infected or necrotic wounds
Requires careful patient selection
Ineffective in cases with severe soft tissue loss
Requires close postoperative follow-up for tension adjustment
The suture-assisted traction technique provides a simple and cost-effective alternative for selected lower limb skin defects. By combining progressive PDS suturing with mechanical traction using Kirschner wires and cable ties, controlled wound closure can be achieved without the need for complex reconstructive surgery.
This method is particularly valuable in post-traumatic and post-fasciotomy wounds where traditional closure is difficult, offering a practical solution for both specialized and resource-limited clinical environments.
