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Related Experiment Videos

High-burst-strength, feedback-controlled bipolar vessel sealing

J S Kennedy¹, P L Stranahan, K D Taylor

¹Valleylab, Inc., 5920 Longbow Drive, Boulder, CO 80301, USA.

Surgical Endoscopy

|June 5, 1998

Summary

New electrothermal seals offer a reliable alternative to traditional knot tying for hemostasis. These seals demonstrate comparable bursting strengths to clips and ligatures, ensuring effective vessel closure.

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Area of Science:

Vascular Surgery
Surgical Hemostasis
Biomaterials Science

Background:

Intracorporeal knot tying presents challenges in surgical procedures.
There is a growing need for efficient alternatives for achieving hemostasis.

Purpose of the Study:

To evaluate the efficacy of energy-based seals for vascular hemostasis.
To compare the bursting strength of electrothermal seals with conventional methods.

Main Methods:

Sealing of 331 arteries and veins using controlled electrothermal energy and physical compression.
Comparison of seal bursting strength against ultrasonic, bipolar coagulation, surgical clips, and ligatures.

Main Results:

Electrothermal seals exhibited significantly higher bursting strengths (>400 mmHg) than ultrasonic and bipolar occlusions (p < 0.001).

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Seal competence was visually confirmed by translucence.

Seals demonstrated comparable bursting strengths to clips and ligatures.

Conclusions:

Precise energy control and compression create a translucent, protein-based seal.
These seals are robust, comparable to clips and ligatures, and integrated into the vessel wall.
The seals can typically be transected after a single application, simplifying surgical procedures.