Hypercapnic respiratory failure in case of chiari 1.5 malformation: Case Report and review of the literature

Viralkumar M Vasani, Subhas Kanti Konar, S Satish

Indian Journal of Critical Care Medicine 2017 21(10):707-709

Type 2 respiratory failure is defined as hypercapnia associated with hypoxia. Chiari 1.5 is known as herniation of the cerebellar tonsils along with brain stem and fourth ventricle. We report a 35-year-old male who presented with acute hypercapnic respiratory failure (Type 2), without any preexisting neurological or respiratory abnormality. Analysis of blood gases in emergency revealed a pH of 7.12, pCO2of 132 mmHg, and arterial oxygen tension of 118 mm Hg. He was intubated and ventilated. Magnetic resonance imaging brain revealed herniation of the cerebellar tonsils along with brain stem and fourth ventricle. The patient underwent surgery and gradually weaned off. He was mobilized and discharged on day 6. Acute respiratory failure has not been reported with Chiari 1.5 malformation. The lesson to be learned from this case is that craniospinal pathology must be looked for in a patient with hypercapnic respiratory failure.

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