Cerebral catheter angiography in Jordan

Diagnostic cerebral angiography, often called a brain catheter study, is an imaging test that examines the arteries of the neck and brain from the inside. Under local anaesthetic a fine catheter is introduced through an artery in the upper thigh or the wrist and guided into the neck arteries; contrast is then injected while sequences of X-ray images are taken in several projections. The result is an extremely detailed map of blood flow to the brain that no other test reproduces with the same resolution. The study is usually requested when non-invasive tests such as CT or MR angiography are not sufficient: to characterise a cerebral aneurysm or an arteriovenous malformation, to investigate subarachnoid haemorrhage, to assess arterial narrowing, to look for suspected vasculitis, or to plan treatment before surgery or an endovascular intervention. A diagnostic session may be followed immediately by treatment through the same catheter when this has been planned and consented to in advance. Its limits are clear. This catheter study is diagnostic in nature and does not treat anything by itself, and it images blood vessels rather than brain tissue, so it does not replace MRI or CT when the question concerns a stroke, a tumour or inflammation within the brain substance. Because it is an invasive test that carries a small but real neurological risk, it is performed only when a clinical question cannot be answered by simpler tests, and the decision is made by clinical examination and the neurovascular team's assessment rather than on request. A widespread myth is that a brain catheter study is open surgery in which the skull is opened. In fact it is done through a skin puncture with no incision in the head; patients are usually awake and are asked to stay still and hold their breath briefly during imaging runs. Ask your doctor why this particular test has been chosen for you, what the alternatives are and what complications are possible before you consent.