A teardrop-shaped island cast adrift in the Indian Ocean, Sri lanka is filled with cultural and natural treasures. Indians, Portuguese, Dutch and British have all left their marks here, making for a delightful mix of ancient cities, monuments and grand colonial architecture.
An external ventricular drain (EVD) is a temporary drain that drains cerebro-spinal fluid (CSF) from the lateral ventricles in the centre of the brain to an external reservoir. The EVD consists of a thin plastic tube (catheter) which is placed into the ventricles of the brain and connected to an external drainage system. The two main reasons EVDs are inserted are:
Modern hydraulic fluids and turbine oils have become increasingly less conductive, thus more susceptible to electrostatic discharge (ESD). The susceptibility for a turbine and hydraulic fluid electrostatic discharge is generally monitored by the fluid's conductivity. Electric conductivity measures a fluid's electrostatic chargeability and whether a static discharge is potential. It usually is expressed in picosiemens per meter (pS/m).