Preservation of cardiopulmonary blocks: A real and interactive biomaterial for teaching and learning lung plethysmography and mechanical ventilation

Abstract The introduction of biomaterials to thoracic training has an important impact on human health and has significant economic benefits. We present a real, reusable and low-cost biomaterial that is a useful tool in teaching and learning training programs for lung plethysmography and mechanical ventilation procedures. At the end of non-cardiopulmonary-related research studies, five cardiopulmonary blocks were harvested from rabbits (3), a dog (1) and a cat (1). Cardiopulmonary blocks were preserved with McCormick’s solution and impregnated with glycerin-phenic acid. Subsequently, the cardiopulmonary blocks were connected to a volume ventilator to ensure good lung compliance and that there was no leakage. An acrylic plethysmograph was designed, and cardiopulmonary blocks were placed through an endotracheal tube and connected to a ventilator. Lungs were insufflated under four different inspiratory pressures (10, 12, 14 and 16 cmH2O), and respiratory parameters were calculated. Although it was necessary to significantly increase the inspired tidal volume and the compliance decreased (ANOVA + Student’s t: p<0.05) compared to the values required for blowing non-preserved cardiopulmonary blocks, all the preserved cardiopulmonary blocks maintained their structural integrity, and the lungs were shown to be elastic pieces with smooth texture, along with distension and insufflation capacities. This biomaterial was shown to be functional and reusable for the teaching and learning of lung plethysmography and mechanical ventilation practices.

Keywords Cardiopulmonary Block, Preservation, Biomaterial, Plethysmography, Education.

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Dynamic analyses of a flat plate and a beam subjected to a moving load

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