Antenna coupling explains unintended thermal injury caused by common operating room monitoring devices

Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
Nicole T TownsendThomas N Robinson

Abstract

Unintended thermal injury from patient monitoring devices (eg, electrocardiogram pads, neuromonitoring leads) results in third-degree burns. A mechanism for these injuries is not clear. The monopolar "bovie" emits radiofrequency energy that transfers to nearby, nonelectrically active cables or wires without direct contact by capacitive and antenna coupling. The purpose of this study was to determine if, and to what extent, radiofrequency energy couples to common patient monitoring devices. In an ex vivo porcine model, monopolar radiofrequency energy was delivered to a handheld "bovie" pencil. Nonelectrically active neuromonitoring and cardiac-monitoring leads were placed in proximity to the monopolar pencil and its cord. Temperature changes of tissue touched by the monitoring lead were measured using a thermal camera immediately after a 5-second activation. The energy-device cords were then separated by 15 cm, the power was reduced from 30 W coag to 15 W coag and different cord angulation was tested. An advanced bipolar device, a plasma-based device, and an ultrasonic device were also tested at standard settings. The neuromonitoring lead increased tissue temperature at the insertion site by 39 ± 13°C (P<0.001) creating visible ...Continue Reading

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Citations

Dec 1, 2015·Current Problems in Surgery·Daniel B JonesStephanie B Jones
Sep 30, 2020·AORN Journal·Emily Jones, Amber Wood
May 10, 2020·Surgical Endoscopy·Douglas M OverbeyEdward L Jones
Feb 17, 2017·Surgical Endoscopy·Edward L JonesThomas N Robinson
Sep 30, 2017·Bioelectromagnetics·Satheesh Bojja-VenkatakrishnanAsimina Kiourti
Jan 26, 2021·Annals of Medicine and Surgery·Patrizia GualnieraAlessio Asmundo

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