Abstract
Article: Written Feedback on Thermal Index During the First-Trimester Nuchal Translucency Examination Does Not Improve Compliance With the “as Low as Reasonably Achievable” Principle
Authors: Jennifer E. Bagley, MPH, RDMS, RVT, FAIUM, Freshta Nematzadeh, BSMIRS, RDMS, RDCS, RVT, Jean Lea Spitz, MPH, CAE, RDMS, FAIUM, FSDMS, and Jonathan Baldwin, MS, CNMT, RT(CT)
Category: OB/GYN [OB]
Credit: 0.75 SDMS CME Credit
Objectives: After studying the article entitled “Written Feedback on Thermal Index During the First-Trimester Nuchal Translucency Examination Does Not Improve Compliance With the ‘as Low as Reasonably Achievable’ Principle,” you will be able to:
Identify bioeffects associated with obstetric studies
Recognize output and thermal index (TI) maximum values that are recommended in the profession of sonography
Describe temperature ranges that a fetus could experience within the uterus
Which is a bioeffect of ultrasound that must be considered in obstetric studies? Cavitation Radiation Hypothermia Anaphylaxis
Which acoustic output is allowed by the Food and Drug Administration (FDA) for sonographic examinations? 640 mW/cm2 820 mW/cm2 720 mW/cm2 400 mW/cm2
Which predicts heat production during an obstetric sonogram? Mechanical index (MI) Thermal index (TI) Output display standard (ODS) Frequency (FR)
Which gestational week should the thermal index (TI) be displayed as bone (TIb)? 10 8 20 14
What is the actual range of temperature that a fetus in utero could experience? 1.5–2.0°C 2.0–3.5°C 0.5–2.0°C 0.0–1.5°C
What was the average TIb on the first submission among practitioners that addressed as low as reasonably achievable (ALARA)? 1.03 0.94 0.77 1.2
Which TIb value is the maximum limit recommended by the American Institute of Ultrasound in Medicine (AIUM)? 0.7 0.9 1.1 1.3
Footnotes