La hidromielia, dilatación del conducto ependimario, es un hallazgo aleatorio cuya incidencia está aumentando gracias al uso de la resonancia magnética. Durante el parto, se puede realizar anestesia locorregional central sin aumentar la incidencia de complicaciones o secuelas neurológicas. Es importante diferenciarla de la siringomielia, una cavidad llena de líquido en la médula espinal y revestida de células gliales que suele asociarse al síndrome de Chiari y que puede producir, con la anestesia locorregional central, dependiendo de su localización, un mecanismo valvular del LCR y aumentar la presión intracraneal.
Hydromyelia, dilation of the ependymal duct, is a random finding that is increasing in incidence due to the use of magnetic resonance imaging. During labour, central locoregional anaesthesia can be performed without increasing the incidence of neurological complications or sequelae. It is important to differentiate it from syringomyelia, a fluid-filled cavity in the spinal cord and lined with glial cells that is usually associated with Chiari syndrome and can produce, with central locoregional anaesthesia, depending on its location, a valvular mechanism of the CSF and increase intracranial pressure.