Doppler ultrasound

Ultrasound is a technique that uses high frequency sound waves to produce images of tissues. Doppler ultrasoundA type of scan that allows the examination of blood flow in vessels and within the heart. is a type of ultrasound that can be used to assess the bloodA fluid that transports oxygen and other substances through the body, made up of blood cells suspended in a liquid. vessels round the brain.

This is completely non-invasiveAny test or technique that does not involve penetration of the skin. The term 'non-invasive' may also describe tumours that do not invade surrounding tissues. , and can be done by a patient's bedside if they are in hospital following a stroke. It can be used to assess the state of the bloodA fluid that transports oxygen and other substances through the body, made up of blood cells suspended in a liquid. vessels before treatment, and to see how well bloodA fluid that transports oxygen and other substances through the body, made up of blood cells suspended in a liquid. flow is restored afterwards.

Doppler ultrasoundA type of scan that allows the examination of blood flow in vessels and within the heart. is the most widely available method for assessing the bloodA fluid that transports oxygen and other substances through the body, made up of blood cells suspended in a liquid. vessels in and around the brain non-invasively.[1]

Doppler ultrasoundA type of scan that allows the examination of blood flow in vessels and within the heart. can also be used to identify children with sickle cell diseaseA hereditary blood disease in which red blood cells form a sickle shape, and are removed from the circulation. who are at risk of a stroke.[2]

References: 
  1. Schellinger PD, Fiebach JB, Hacke W et al. Imaging-based decision making in thrombolytic therapy for ischemic stroke: present status. Stroke 2003;34:575-83.
  2. Adams RJ. Big strokes in small persons. Arch Neurol 2007; 64: 1567-74.