Describe an esophageal stethoscope. What is the benefit of using this monitoring device during surgery?
The esophageal stethoscope is made by removing the bell and attaching a red rubber catheter in its place. The benefit is that, once it is placed correctly (behind the endotracheal tube), the heart rate may be monitored without disruption to the surgical field.
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The EMT is correctly using a noninvasive blood pressure monitor when she:
A) auscultates a blood pressure before applying and activating the device. B) alternates arms for each blood pressure that is obtained with the device. C) confirms each reading on the device by palpating a pressure in the opposite arm. D) places the cuff of the noninvasive BP monitor on the patient's forearm.
A pathological Q wave indicating infarction should measure:
A) 0.004 second. B) 0.12 second. C) 0.32 second. D) 0.04 second.
A graph that presents the frequency of data through the use of a circle drawn and divided into sections that correspond to the frequency in each category is called a
A. histogram B. pie chart C. line graph D. bar graph E. frequency polygon
A 69-year-old female was involved in a motor vehicle crash. She is semiconscious with a blood pressure of 80/50 mm Hg and a heart rate of 74 beats/min that is weak. Her daughter, who was uninjured in the crash, tells you that her mother has a history of hypertension and takes beta-blockers. Considering the fact that this patient is probably in shock, what is the MOST likely explanation for the absence of tachycardia?
A. deterioration of the cardiac conduction system B. intrathoracic bleeding and cardiac compression C. the effects of her antihypertensive medication D. failure of the parasympathetic nervous system