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Decrease in spectral entropy by low tidal volume ventilation-associated severe hypercapnia: a case report / 대한마취과학회지
Korean Journal of Anesthesiology ; : 213-216, 2017.
Article in English | WPRIM | ID: wpr-132561
ABSTRACT
Severe hypercapnia can be predicted by a decrease in cerebral electrical activity. The authors describe a sudden decrease in spectral entropy due to severe hypercapnia-induced respiratory acidosis in a patient with chronic pulmonary obstructive disease during lung resection. After two and a half hours of low tidal volume ventilation in the lateral position, the state entropy suddenly dropped from 45 to 7, without any changes in the effect-site concentration of propofol, end-tidal carbon dioxide (CO₂) tension, oxygen saturation, or arterial pressure. However, arterial blood gas analysis showed severe respiratory acidosis (pH 7.01, PaCO₂ 115 mmHg and PaO₂ 246 mmHg with FIO₂ of 0.5). Immediate hyperventilation improved the state entropy and acid-base balance. Electroencephalography-based spectral entropy can detect severe hypercapnia in chronic pulmonary obstructive disease patients with a large arterial to end-tidal CO2 difference due to prolonged hypoventilation during thoracic surgery.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Oxygen / Thoracic Surgery / Acid-Base Equilibrium / Acidosis, Respiratory / Ventilation / Blood Gas Analysis / Carbon Dioxide / Propofol / Tidal Volume / Entropy Limits: Humans Language: English Journal: Korean Journal of Anesthesiology Year: 2017 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Oxygen / Thoracic Surgery / Acid-Base Equilibrium / Acidosis, Respiratory / Ventilation / Blood Gas Analysis / Carbon Dioxide / Propofol / Tidal Volume / Entropy Limits: Humans Language: English Journal: Korean Journal of Anesthesiology Year: 2017 Type: Article