Method for creating ideal tissue fusion in soft-tissue structures using radio frequency (RF) energy

Area of Science:

• Biomedical Engineering
• Surgical Technology
• Tissue Engineering

Background:

• Bipolar radiofrequency (RF) energy effectively seals vascular structures up to 7 mm by fusing collagen and elastin.
• Existing RF systems lack precise tissue fusion monitoring.
• Valleylab developed a closed-loop, feedback-control RF generator for optimized soft-tissue fusion.

Purpose of the Study:

• To evaluate a novel closed-loop, feedback-control RF generator for soft-tissue amalgamation.
• To assess the efficacy of this system in sealing canine lung and porcine small intestine.
• To investigate the acute and chronic performance of RF-induced tissue fusion.

Main Methods:

• RF energy was applied to canine lung and porcine small intestine using a prototype device and closed-loop generator.
• Lobectomy was performed on canine lung, sealing bronchi, parenchyma, and vasculature.
• Anastomosis was created in porcine small intestine, with assessments for hemostasis and seal quality.
• Histopathological analysis evaluated acute and chronic tissue fusion, healing, and seal integrity.

Main Results:

• Histopathology confirmed successful acute and chronic tissue fusion in both canine lung and porcine small intestine.
• RF energy application resulted in effective sealing of major structures during lobectomy.
• Tissue evaluation showed normal pathological healing processes, including angiogenesis and fibroblast proliferation.
• The closed-loop generator demonstrated precise control over energy delivery for optimized tissue amalgamation.

Conclusions:

• The closed-loop, feedback-control RF generator shows significant potential for soft-tissue amalgamation.
• This technology enables optimized tissue fusion by continuously adjusting energy output.
• The system is applicable to various soft-tissue structures rich in collagen and elastin.
• Further research into diverse surgical applications is warranted.