Facial pressure zones of an oronasal interface for noninvasive ventilation: a computer model analysis

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Luana Barros (Author) FEUP; Pedro Talaia (Author) Other; Marta Freitas (Author) FMUP; Renato Natal Jorge (Author) FEUP

Journal

Title: Jornal Brasileiro de Pneumologia

Vol. 40

Pages: 652-657

ISSN: 1806-3713

Publisher: Sociedade Brasileira de Pneumologia e Tisiologia

Indexing

ISI Web of Knowledge - 3 Citations

ISI Web of Science

Scopus - 6 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Biomedical enginnering

FOS: Medical and Health sciences > Medical biotechnology

Other information

Authenticus ID: P-00A-3C3

DOI: 10.1590/s1806-37132014000600009

Abstract (EN): Objective: To study the effects of an oronasal interface (OI) for noninvasive ventilation, using a three-dimensional (3D) computational model with the ability to simulate and evaluate the main pressure zones (PZs) of the OI on the human face. Methods: We used a 3D digital model of the human face, based on a pre-established geometric model. The model simulated soft tissues, skull, and nasal cartilage. The geometric model was obtained by 3D laser scanning and post-processed for use in the model created, with the objective of separating the cushion from the frame. A computer simulation was performed to determine the pressure required in order to create the facial PZs. We obtained descriptive graphical images of the PZs and their intensity. Results: For the graphical analyses of each face-OI model pair and their respective evaluations, we ran 21 simulations. The computer model identified several high-impact PZs in the nasal bridge and paranasal regions. The variation in soft tissue depth had a direct impact on the amount of pressure applied (438-724 cmH(2)O). Conclusions: The computer simulation results indicate that, in patients submitted to noninvasive ventilation with an OI, the probability of skin lesion is higher in the nasal bridge and paranasal regions. This methodology could increase the applicability of biomechanical research on noninvasive ventilation interfaces, providing the information needed in order to choose the interface that best minimizes the risk of skin lesion.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6