More Random Numbers/Facts Flashcards
The ICA peak systolic velocities corresponding to >70%, 50-70%, and <50% stenosis are?
A peak systolic velocity of > 230 cm/sec corresponds to > 70% stenosis, a peak systolic velocity of 125-230 cm/sec corresponds to 50-70% stenosis, and a peak systolic velocity of < 125 cm/sec corresponds to < 50% stenosis.
What are the two measurements you must know to call a failed pregnancy? (both are based on TVUS).
There are 2 measurements you must know to call a failed pregnancy (both are based on transvaginal sonography): (1) Mean sac diameter ≥ 25 mm without an embryo, (2) Crown rump length ≥ 7 mm without cardiac activity.
What is the recommended compression ventilation ratio in Basic Life Support (BLS) CPR in an adult?
30:2
To maintain FDA accreditation, what is the required amount of breast-specific CME for interpreting physicians?
15 units every 3 years
Which ACR initiative includes specific recommendations for equipment specifications or settings?
ACR Technical Standards
What is relative biological effectiveness (RBE)?
The ratio of the doses from different types of radiations to cause a given effect
In Lean Process Improvement, work accumulating in a queue is considered a fundamental source of waste. What methodology strives to eliminate this type of waste?
Pull systems, just-in-time or kanban.
What are the performance goals for screening mammography as determined by the US Agency for Health Care Policy and Research?
Recall rate ≤ 10%; positive predictive value of biopsy recommendation > 25%=d
Which governing body plays a role in radiological protection standards, legislation, guidelines, programs, and practice?
International Commission on Radiological Protection (ICRP)
According to 10 CFR 20, the maximum dose a worker may receive to his or her whole body in a year is which of the following?
What is the dose limit for a pregnant worker?
How many rem in 1 Sv?
5 rem is the annual occupational dose limit to the whole body.
The dose limit for a pregnant worker is 500 mrem.
1 Sv = 100 rem, therefore 5 Sv = 500 rem, and 0.5 Sv = 50 rem.
What is the unit of radioactivity?
The unit of radioactivity is the becquerel (Bq) or the curie (Ci), where 1 Ci = 3.7 x 10^10 Bq and 1 Bq = 1 disintegration per second. Activity is a measure of the number of transformations (decays) that a mass of radioactive atoms will undergo per unit time.
What is an isotope?
Isotopes are atoms that have the same number of protons and a different number of neutrons.
Once a medical event has been discovered, how many days are allowed to notify the Nuclear Regulatory Commission (NRC) in writing?
The Nuclear Regulatory Commission (NRC) states that the licensee shall submit a written report to the appropriate NRC Regional Office within 15 days after discovery of the medical event.
tPA catheter-directed thrombolysis
What rate do you infuse tPA?
When do you stop infusing (fibrinogen or PTT levels)
Unrelated question: what dose of heparin can be given in a procedure?
Reassessment can be done how many hours?
What is considered a major relative contraindication?
- tPA is typically infused at 0.5-1 mg/h,
- hold if fibrinogen drops below 100 mg/dL or if PTT climbs above 60 seconds.
- 2,000-5,000 u/hr is a dosage for IV heparin which could be given during a procedure, but is not appropriate for tPA.
- Angiographic reassessment usually occurs after 8-20 hours of CDT, not typically after 2-4 hours.
- Recent major trauma (< 4 weeks) is often considered a major relative contraindication to CDT, but not an absolute contraindication.
