Emergency and Interventional Radiology MCQs

Biparietal Diameter is for Gestational age in second trimester Abdominal Circumference is to evaluate fetal growth -IUGR/macrosomia Femur length is used to measure gestational age in late third trimester Crown rump length is most accurate for gestational age in first trimester and most accurate for Expected Date of Delivery Reference: David sutton textbook of radiology edition 8 chapter 47

Wormian bones (also known as intrasutural bones ) is the name given to the additional small bones sometimes found between the cranial sutures of the bones of the skull vault, most commonly in relation to the lambdoid suture Mnemonic P: pyknodysostosis O: osteogenesis imperfecta R: rickets K: kinky hair syndrome C: cleidocranial Dysostosis H: hypothyroidism/hypophosphatemia O: otopalatodigital syndrome P: primary acroosteolysis (Hajdu-Cheney)/pachydermoperiostosis/progeria S: syndrome of Downs Reference: Yochum and Rowe's essentials of skeletal radiology, third edition, volume 1 page A-2

Tc-99m sulphur colloid is taken up by Reticuloendothelial system like macrophages and bone marrow Reference: Mc-Graw Hill speciality Board review Radiology page number 727

99mTc diethylenetriamine penta-acetic acid (99mTc DTPA) is almost entirely filtered through the glomerulus, and therefore is useful to measure glomerular filtration rate (GFR). Reference: Mc-Graw Hill speciality Board review Radiology page number 749

The creeping fat sign or wrapping fat refers to the fibrofatty proliferation of the mesenteric tissue adjacent to chronic inflamed bowel loops and has been considered to be a finding characteristic of Crohn disease. Reference: Berry radiology book, page number 1786

MRI is Non ionising technique using Radiofrequency waves MRI has Long Acquisition time and is time consuming,hence cannot be used in emergencies. Reference: Pathobiology of human disease, 2014

Mechanism of action of steroids in acute attack of bronchial asthma is to increase the bronchodilatory effect of beta 2 agonists, whereas in prophylaxis, their major mechanism is anti-inflammatory. Glucocorticoids are useful in both treatment and prophylaxis of bronchial asthma. Reference: Essentials of Medical Pharmacology by KD Tripathi, 8 th Edition, Page Number-249.

The decreased bowel sounds (constipation), respiratory depression, pinpoint pupils and history of heroin addiction strongly points toward the diagnosis of acute opioid poisoning. The drug of choice for acute opioid poisoning is intravenous naloxone. Reference: Kaplan & Sadock's Comprehensive Textbook of Psychiatry, 9th Edition, Page Number 1375-76,1384; Essentials of Medical Pharmacology by KD Tripathi, 8th Edition, Page Number 511-512.