Lung perfusion [99mTc]-MAA SPECT/CT to rule out pulmonary embolism in COVID-19 patients with contraindications for iodine contrast

Absent pulmonary uptake on 99mTc MAA perfusion lung scan due to severe right-to-left shunt.

c 5 XTRAPULMONARY accumulation of Tc macroaggregated albumin (MAA) is rarely een on perfusion lung scan, and has been reported n less than 4% of a study population of nearly 380 atients.1 It occurs when the agent bypasses the ungs due to a right-to-left (R-L) cardiac or pulonary shunt, when it is shunted to the portal vein efore reaching the right atrium and ventricle of he heart, and when the ...

Determination of Diagnostic Value of Albumin, Anti Thrombin Ш, and Fibrinogen Factors in the Diagnosis of Pulmonary Embolism Compared to Lung Perfusion Scan in Patients with Nephrotic Syndrome

Bachground: The aim of this study was to determine of diagnostic value of albumin, anti-thrombin Ш, and fibrinogen factors in the diagnosis of pulmonary embolism compared to lung perfusion scan in patients with nephrotic syndrome referred to Hazrat Ali Asghar hospital of Tehran city (Iran) in 2018-2019.  Methods: This study was cross sectional study that was carried out on 30 patients with nep...

Introducing an index to predict lung involvement deficiency in hypertensive patients with COVID-19

The pulmonary embolism rule-out criteria (PERC) rule does not safely exclude pulmonary embolism.

BACKGROUND The Pulmonary Embolism Rule-out Criteria (PERC) rule is a clinical diagnostic rule designed to exclude pulmonary embolism (PE) without further testing. We sought to externally validate the diagnostic performance of the PERC rule alone and combined with clinical probability assessment based on the revised Geneva score. METHODS The PERC rule was applied retrospectively to consecutive...

Inferior vena cava filters for HIV infected patients with pulmonary embolism and contraindications to anticoagulation.

OBJECTIVES To describe the mode of presentation, interventions, and outcome of HIV infected patients with pulmonary embolism and a contraindication to anticoagulation, who were treated with a bird's nest filter. METHODS Retrospective review of case records and imaging department database at UCL Hospitals, London, UK. RESULTS Three patients had pulmonary embolism and contraindications to ant...