'Aneurysm Number' may help surgeons make treatment decisions

Aneurysms form as abnormal bulges over an artery, and, if ruptured, can lead to serious health complications or even death. Some can exist for a long time without rupturing, and surgery can be risky, so a parameter to help surgeons is needed. Researchers report that they have developed a simple nondimensional parameter that depends on both geometry and flow waveform to classify the flow mode in both sidewall and bifurcation aneurysms.