A small focal spot reduces penumbra
Indicate whether the statement is true or false
True. Penumbra is a partial shadow (fuzzy, unsharp zone) around the edge of a structure. A small focal spot reduces penumbra, resulting in a sharper image with less magnification.
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Tragically, you have just arrived by the side of a 23-year-old female who is 37 weeks pregnant and apneic and pulseless after being shot in the abdomen. Regarding care of this woman, which of the following statements would you provide to other rescuers on scene?
A) "Sadly, there is nothing that can be done, I will call medical direction and inform the doctor." B) "I am going to call for ALS backup; it is her and her baby's only chance for survival." C) "I need someone to listen for fetal heart tones to see if the baby is still alive." D) "Waiting for ALS backup is not beneficial; we need to provide CPR and get her to the hospital now!"
The 18-gauge needles used to collect donor blood for transfusion have a larger bore than do standard blood collection needles. What is the advantage of this needle?
a. The needle minimizes discomfort to the donor. b. The needle allows for tube holder and vacutainer use. c. The phlebotomist has better technique with a larger needle. d. The collection process is faster, and less hemolysis occurs.
The British Doctors Study
a. Is an example of a cohort study b. Published findings in 2004 c. Examined the relationship between smoking and lung cancer d. a and b only e. All of the above
Which of the following statements regarding a newborn's initial respiratory effort is correct?
A. Tactile stimulation should be provided until an apneic newborn begins to breathe. B. Drying and suctioning the newborn rarely initiates effective respiratory effort C. Inadequate respiratory effort may be managed with brief tactile stimulation. D. The normal respiratory rate for a newborn is between 50 and 70 breaths/min.