Impact of Cardiopulmonary Bypass on Respiratory Mucociliary Function in an Experimental Porcine Model

The impact of cardiac surgery using cardiopulmonary bypass (CPB) on the respiratory mucociliary function is unknown. This study evaluated the effects of CPB and interruption of mechanical ventilation on the respiratory mucociliary system. Twenty-two pigs were randomly assigned to the control (n = 10...

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Veröffentlicht in:PloS one 2015-08, Vol.10 (8), p.e0135564-e0135564
Hauptverfasser: Sánchez-Véliz, Rodrigo, Carmona, Maria José, Otsuki, Denise Aya, Freitas, Claudia, Benício, Anderson, Negri, Elnara Marcia, Malbouisson, Luiz Marcelo
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container_title PloS one
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creator Sánchez-Véliz, Rodrigo
Carmona, Maria José
Otsuki, Denise Aya
Freitas, Claudia
Benício, Anderson
Negri, Elnara Marcia
Malbouisson, Luiz Marcelo
description The impact of cardiac surgery using cardiopulmonary bypass (CPB) on the respiratory mucociliary function is unknown. This study evaluated the effects of CPB and interruption of mechanical ventilation on the respiratory mucociliary system. Twenty-two pigs were randomly assigned to the control (n = 10) or CPB group (n = 12). After the induction of anesthesia, a tracheostomy was performed, and tracheal tissue samples were excised (T0) from both groups. All animals underwent thoracotomy. In the CPB group, an aorto-bicaval CPB was installed and maintained for 90 minutes. During the CPB, mechanical ventilation was interrupted, and the tracheal tube was disconnected. A second tracheal tissue sample was obtained 180 minutes after the tracheostomy (T180). Mucus samples were collected from the trachea using a bronchoscope at T0, T90 and T180. Ciliary beat frequency (CBF) and in situ mucociliary transport (MCT) were studied in ex vivo tracheal epithelium. Mucus viscosity (MV) was assessed using a cone-plate viscometer. Qualitative tracheal histological analysis was performed at T180 tissue samples. CBF decreased in the CPB group (13.1 ± 1.9 Hz vs. 11.1 ± 2.1 Hz, p < 0.05) but not in the control group (13.1 ± 1 Hz vs. 13 ± 2.9 Hz). At T90, viscosity was increased in the CPB group compared to the control (p < 0.05). No significant differences were observed in in situ MCT. Tracheal histology in the CPB group showed areas of ciliated epithelium loss, submucosal edema and infiltration of inflammatory cells. CPB acutely contributed to alterations in tracheal mucocilliary function.
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This study evaluated the effects of CPB and interruption of mechanical ventilation on the respiratory mucociliary system. Twenty-two pigs were randomly assigned to the control (n = 10) or CPB group (n = 12). After the induction of anesthesia, a tracheostomy was performed, and tracheal tissue samples were excised (T0) from both groups. All animals underwent thoracotomy. In the CPB group, an aorto-bicaval CPB was installed and maintained for 90 minutes. During the CPB, mechanical ventilation was interrupted, and the tracheal tube was disconnected. A second tracheal tissue sample was obtained 180 minutes after the tracheostomy (T180). Mucus samples were collected from the trachea using a bronchoscope at T0, T90 and T180. Ciliary beat frequency (CBF) and in situ mucociliary transport (MCT) were studied in ex vivo tracheal epithelium. Mucus viscosity (MV) was assessed using a cone-plate viscometer. Qualitative tracheal histological analysis was performed at T180 tissue samples. CBF decreased in the CPB group (13.1 ± 1.9 Hz vs. 11.1 ± 2.1 Hz, p &lt; 0.05) but not in the control group (13.1 ± 1 Hz vs. 13 ± 2.9 Hz). At T90, viscosity was increased in the CPB group compared to the control (p &lt; 0.05). No significant differences were observed in in situ MCT. Tracheal histology in the CPB group showed areas of ciliated epithelium loss, submucosal edema and infiltration of inflammatory cells. 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CBF decreased in the CPB group (13.1 ± 1.9 Hz vs. 11.1 ± 2.1 Hz, p &lt; 0.05) but not in the control group (13.1 ± 1 Hz vs. 13 ± 2.9 Hz). At T90, viscosity was increased in the CPB group compared to the control (p &lt; 0.05). No significant differences were observed in in situ MCT. Tracheal histology in the CPB group showed areas of ciliated epithelium loss, submucosal edema and infiltration of inflammatory cells. CPB acutely contributed to alterations in tracheal mucocilliary function.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>26288020</pmid><doi>10.1371/journal.pone.0135564</doi><tpages>e0135564</tpages><oa>free_for_read</oa></addata></record>
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subjects Analysis
Anesthesia
Anesthesiology
Animals
Cardiopulmonary Bypass - adverse effects
Catheters
Cilia beat frequency
Coronary artery bypass
Coronary vessels
Diagnostic equipment (Medical)
Edema
Epithelium
Esophagus
Experiments
Female
Heart diseases
Heart surgery
Hemodynamics - physiology
Histology
Infiltration
Inflammation
Laboratory animals
Male
Mechanical ventilation
Medical instruments
Medicine
Mucociliary Clearance - physiology
Mucus
Mucus - physiology
Neutrophils
Ostomy
Outdoor air quality
Pulmonary arteries
Qualitative analysis
Respiratory System
Surgery
Swine
Thoracic Surgical Procedures - adverse effects
Trachea
Tracheostomy
Veins & arteries
Ventilation
Ventilators
Viscosity
title Impact of Cardiopulmonary Bypass on Respiratory Mucociliary Function in an Experimental Porcine Model
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