V/Q Scan

Question 1

V/Q scan?

Answer 1

scintigraphic/gamma examination with large FOV gaMMA camera

Question 2

Indications for a v/q scan?

Answer 2

diagnosis of suspectedpulmonary embolism
monitor pulmonary function followinglung transplant
provide preoperative estimates of lung function inlung cancerpatients, where pneumonectomy is planned

Question 3

Non-rebreather mask?

Answer 3

deliveroxygen therapyto people who require high-concentration oxygen but aren’t in need of breathing assistance. low-flow oxygen delivery systems.

Question 4

3 phases of ventilation v/q scan

Answer 4

initial breath, equilibrium and washout , pt is upright

Question 5

V/Q scan has a reported
sensitivity of ….

Answer 5

around 77%, and
specificity of around 98%.

Question 6

Vq scan evaluates…

Answer 6

Pulmonary vasculature perfusion and bronchoalveolar tree ventilation

Question 7

V/q scan performed with radio isotope …

Answer 7

Aerosol technetium 99m dtpa via non-rebreather

Question 8

What’s perfusion scan?

Answer 8

Blood flow lung scan -supine injection of tc-99m MAA - particles get lodged in pre-capillary arterioles

Question 9

Abnormal vq scan is when..

Answer 9

Blood supply and ventilation regions do NOT match