MEDICAL PHYSIOLOGY

Detailed explanation-1: -A ventilation-perfusion (VQ) scan is a diagnostic test using radioisotopes to evaluate lung perfusion and ventilation. Ventilation-perfusion scan consists of two portions, a ventilation (V) scintigraphy and a perfusion (Q) scintigraphy.

Detailed explanation-2: -Pulmonary ventilation (V) and Perfusion (Q) scan, also known as lung V/Q scan, is a nuclear test that uses the perfusion scan to delineate the blood flow distribution and the ventilation scan to measure airflow distribution in the lungs.

Detailed explanation-3: -The “V” stands for ventilation, or airflow in and out of your lungs. The “Q” stands for quantity of perfusion, or blood flow to the small blood vessels in your lungs. You might also hear it called a ventilation-perfusion scan, a lung scan or lung scintigraphy.

Detailed explanation-4: -During the perfusion scan, a health care provider injects radioactive albumin into your vein. You are placed on a movable table that is under the arm of a scanner. The machine scans your lungs as blood flows through them to find the location of the radioactive particles.