Current leakage in bipolar electrocoagulation

Area of Science:

• Neurosurgery
• Biomedical Engineering
• Electrophysiology

Background:

• Bipolar electrocoagulation devices can leak significant current to ground.
• This current leakage poses a risk of unintended tissue damage.
• No established safety standards currently exist for bipolar equipment current leakage.

Purpose of the Study:

• To establish safe parameters for current leakage to ground from bipolar electrocoagulation devices.
• To define a damage-no damage threshold for electrical stimulation on brain tissue.
• To evaluate existing bipolar electrocoagulators against proposed safety limits.

Main Methods:

• Monopolar electrical stimulations were conducted on canine brain surfaces.
• The blood-brain barrier integrity was monitored as a primary indicator of tissue damage.
• Current leakage measurements were taken from various bipolar electrocoagulation devices.

Main Results:

• The threshold for damage versus no damage was determined to be approximately 10 to 15 mA.
• A majority of tested bipolar electrocoagulators exceeded this safe leakage limit.
• Significant current leakage was observed from the outputs of tested devices.

Conclusions:

• A safe current leakage limit for bipolar electrocoagulation is proposed at 10-15 mA.
• Current bipolar electrocoagulation devices often surpass safe leakage levels, risking tissue damage.
• The findings necessitate revisions in the design of bipolar electrocoagulation equipment to ensure patient safety.