Increasing NaCl concentrations significantly increases lesion size. NaCl may produce a larger lesion as a result of reduced impedance surrounding the RF cannula and increased power output.
The source of contamination for in-use ultrasound gel may be of manufacturer or human origin. Because additives to the ultrasound gel are not bactericidal, sterile ultrasound gel should be used for invasive and high-risk cases, and improving infection-control policies is warranted.
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