An Electrode Array for Limiting Blood Loss During Liver Resection: Optimization via Mathematical Modeling.

Area of Science:

• Surgical Innovation
• Biomedical Engineering
• Oncology

Background:

• Liver resection is standard for liver cancer, but significant blood loss causes morbidity and mortality.
• Blood transfusions after surgery are linked to poorer long-term survival and increased complications.
• Reducing intraoperative hemorrhage is critical for improving patient outcomes in liver surgery.

Purpose of the Study:

• To evaluate novel radiofrequency (RF) electrode array designs for enhanced hemostasis during liver resection.
• To optimize electrode shape, spacing, and power application for effective tissue coagulation and reduced blood loss.
• To assess the potential of RF technology to minimize complications associated with liver resection.

Main Methods:

• Utilized Finite Element Method (FEM) modeling to simulate RF electrode performance.
• Evaluated monopolar vs. bipolar power application, needle vs. blade electrode shapes, and varying electrode distances.
• Measured electric current density, temperature distribution, and coagulation zone size for different configurations.

Main Results:

• A bipolar configuration with blade-shaped electrodes (5 x 0.1 mm) spaced 1.5 cm apart demonstrated optimal performance.
• This design rapidly generated a ~1.5 cm wide coagulation zone with temperatures exceeding 97°C within 3 minutes.
• The optimized array effectively facilitated coagulation of large vessels within the targeted tissue slice.

Conclusions:

• The developed RF electrode array shows significant promise for reducing blood loss during liver resection.
• This technology may lead to improved patient safety, reduced transfusion requirements, and better long-term survival after liver surgery.
• Optimized RF electrode design offers a viable strategy for enhancing hemostasis in complex liver resections.