University of Twente Student Theses


Electrode usability during a multiday abdominal neuromuscular electrostimulation program

Knipscheer, B. and Stuiver, S. and Welij, J.J. van and Zagers, D.A. (2017) Electrode usability during a multiday abdominal neuromuscular electrostimulation program.

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Abstract:Background: A major problem at the Intensive Care Unit (ICU) is the difficulty of weaning from mechanical ventilation. The mechanical ventilation causes inactivity of the respiratory muscles, which can lead to atrophy after more than 18 hours. These patients are at increased risk for longer stay at the ICU, prolonged mechanical ventilation and mortality. Researchers are studying if neuromuscular electrical stimulation (NMES) of the expiratory abdominal muscles can prevent atrophy, in order to make weaning more easily. In this research, it will be investigated which electrode is most suitable in this application for multiday use. Methods: The electrodes used for this study were UltraStim Wire, PALS Blue and ValuTrode X. Fifteen healthy subjects, divided in groups of five for each electrode, were included. The subjects wore the electrodes on their front and back, for a maximum of five consecutive days. Their abdominal expiratory muscles were stimulated with NMES for sessions of 30 minutes, twice a day. During each session several outcomes were measured. The primary outcome was the condition of the skin. Secondary outcomes were change in electrode impedance, quality of electrode adhesion, thickening fraction of the muscles, the sensitivity of the patients and threshold intensity. Additional research was done to determine the influence of transpiration on the electrodes and to give more information about skin rash. Results: ValuTrode X electrodes caused no skin rash, the impedance only increased significantly for one subject and the mean thickening fraction increased the most. When stimulating at a fixed intensity this electrode was most comfortable and it stayed on the skin longer than the other electrodes. The PALS Blue scored best on adhesion quality and comfort at 90% of maximum intensity. The UltraStim Wire was the only electrode not influenced by transpiration in the additional research. Conclusion: ValuTrode X electrodes scored best on the most outcomes, among which the primary outcome. Therefore, it is best to use this type of electrode at the ICU. The adhesion of the electrodes can be different at the ICU, so the time when the electrodes have to be replaced should be determined there.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:44 medicine, 50 technical science in general
Programme:Technical Medicine BSc (50033)
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