What is the rate on the rhythm strip in the image below?
90
110
73
50
The Correct Answer is A
A. To determine the heart rate from a rhythm strip, you can count the number of R-R intervals in a set time frame (typically 6 seconds) and multiply by 10 to convert to beats per minute. If the rhythm is regular, you can also use the 300 method by dividing 300 by the number of large squares between R waves. In this case, the rate is calculated to be 90 beats per minute.
B. A heart rate of 110 beats per minute would be classified as tachycardia and is not supported by the observed intervals.
C. A heart rate of 73 beats per minute would be a normal resting heart rate but does not match the calculation from the rhythm strip.
D. A heart rate of 50 beats per minute would indicate bradycardia, which is not reflected in this rhythm strip.
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Correct Answer is B
Explanation
A. The palm is not the best part of the hand to assess lymph nodes, as it lacks the sensitivity needed for palpation.
B. The parts of the fingers, particularly the pads of the fingers, are used to assess lymph node size. This allows for a more precise and sensitive examination of the lymph nodes.
C. The dorsal side of the hand is not typically used for palpation because it is less sensitive.
D. The ulnar surface of the hand is not commonly used for this purpose, as the fingertips provide better tactile sensation for assessing lymph node size.
Correct Answer is B
Explanation
A. Observing for facial symmetry assesses cranial nerves VII (facial nerve) rather than cranial nerve III.
B. Checking the pupillary response to light assesses cranial nerve III (oculomotor nerve), which controls pupil constriction and extraocular eye movements.
C. Testing visual acuity assesses cranial nerve II (optic nerve), not cranial nerve III.
D. Eliciting the gag reflex assesses cranial nerves IX (glossopharyngeal) and X (vagus), not cranial nerve III.