What is the LigaSure Vessel Sealing System?
I. Technical Definition & Development Background
LigaSure is a next-generation intelligent bipolar electrosurgical system developed by Valleylab (U.S.), introduced clinically after 2000. Its core technology integrates electrothermal energy, real-time feedback algorithms, and mechanical pressure, overcoming the limitations of traditional bipolar devices (limited to vessels ≤3mm). It enables permanent sealing of vessels ≤7mm (arteries, veins, lymphatics, and vascularized tissue bundles), marking a milestone in "sutureless vessel closure."
II. Working Principles & Innovations
1. Triple Synergistic Mechanism
Smart Impedance Feedback: Dynamically adjusts low voltage (<200V) and high current output by monitoring tissue impedance thousands of times per second, preventing carbonization or incomplete sealing.
Precision Temperature Control: Patented modules stabilize tissue temperature at 70–100°C, ensuring collagen fusion without thermal damage (>120°C).
Pressure Optimization: Delivers 5,000–7,000 kPa jaw pressure to create a 2–3mm translucent seal resistant to 300 mmHg.
2. Functional Breakthroughs
Integrated blade for simultaneous sealing and cutting.
Tissue-sensing technology to differentiate vascular/non-vascular structures.
III. Clinical Applications (Tabulated)
| Specialty | Applicable Procedures | Contraindications |
| General Surgery | Gastrectomy, colectomy, splenectomy, thyroidectomy, Whipple procedure, liver resection, adhesiolysis, etc. | Mesenteric/axillary/carotid arteries |
| Gynecology | Hysterectomy, ovarian/tubal resection, radical hysterectomy (open/laparoscopic), adhesiolysis, ovarian cysts | Fallopian tubes, vaginal tissues |
| Urology | Cystectomy, nephrectomy (open/laparoscopic), radical prostatectomy | Aorta, vena cava, vas deferens |
IV. Key Advantages
Reliable Hemostasis: Permanently seals vessels ≤7mm via collagen/elastin fusion.
Minimized Thermal Spread: Limits lateral damage to 1–2mm, reducing tissue injury.
Operational Efficiency: Reduces procedure time by 20–30% by eliminating sutures.
Versatility: Seals vessels, lymphatics, and tissue bundles in one step.
Safety: Lowers risks of bleeding, nerve injury, and foreign-body reactions.
V. Conclusion
Clinical studies have validated the efficacy of LigaSure in gastrointestinal, gynecologic, and oncologic surgeries, demonstrating enhanced intraoperative visualization and a significant reduction in postoperative recovery intervals. As a cornerstone technology in modern energy-based surgical devices, LigaSure exemplifies the integration of safety, precision, and operational efficiency within minimally invasive surgical paradigms.
