Publication
Title
Mechanical and electrical equipment interference provokes a misleading Neurally Adjusted Ventilatory Assist (NAVA) EAdi signal
Author
Abstract
Background. Neurally Adjusted Ventilatory Assist (NAVA) offers synchronized proportional pressure in accordance with the electrical activity of the diaphragm (EAdi). NAVA relies on the EAdi to trigger the respiratory cycle and then adjusts the ventilatory assist to the neural drive. The technique necessitates a catheter with bipolar microelectrodes positioned near the crural diaphragm where this signal can be captured. Capturing a reliable EAdi signal is a condition sine qua non for using NAVA as a mode of ventilation. The displayed signal represents the sum of the electrical activity of the muscle action potential of the diaphragm and is expressed in microvolts. Methods. A technical note illustrated by a case series in the intensive care unit (ICU) of a tertiary referral hospital with experience using NAVA. Results. Here, we report on three separate cases in which the use of an intra-aortic balloon catheter, a pacemaker and a heating device all resulted in a distortion of the EAdi signal, despite good positioning of the catheter. In a fourth case, we observed internal interference from leaking cardiac electrical activity due to the malpositioning of the EAdi catheter in a patient with atrial fibrillation. Conclusion. We illustrate that the detection and therefore interpretation of the EAdi signal during NAVA can be influenced by mechanical and electrical interference by other equipment used in the ICU or from endogenous leaking cardiac activity.
Language
English
Source (journal)
Minerva anestesiologica. - Torino
Publication
Torino : 2013
ISSN
0375-9393
Volume/pages
79:12(2013), p. 1436-1442
ISI
000330202000017
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 17.11.2015
Last edited 24.09.2017