Lung Scans (Perfusion and Ventilation studies)

Lung Scans (Perfusion and Ventilation studies) is a topic covered in the Davis's Lab & Diagnostic Tests.

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Synonym/Acronym:
Lung Perfusion Scan: Lung perfusion scintigraphy, lung scintiscan, pulmonary scan, radioactive perfusion scan, radionuclide lung scan, ventilation-perfusion scan, V/Q scan. Lung Ventilation Scan: Aerosol lung scan, radioactive ventilation scan, ventilation scan, VQ lung scan, xenon lung scan.

Rationale
To assess pulmonary blood flow and ventilation to assist in diagnosis of pulmonary embolism.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction. No other radionuclide tests should be scheduled within 24 to 48 hr before this procedure. Protocols may vary among facilities.

Normal Findings

Lung Perfusion Scan

  • Diffuse and homogeneous uptake of the radioactive material by the lungs

Lung Ventilation Scan

  • Equal distribution of radioactive gas throughout both lungs and a normal wash-out phase.

Critical Findings and Potential Interventions

  • PE

Timely notification to the requesting health-care provider (HCP) of any critical findings and related symptoms is a role expectation of the professional nurse. A listing of these findings varies among facilities.

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