A patient with a head injury has an intracranial pressure (ICP) of 18 mm Hg. Her blood pressure is 144/90 mm Hg, and her mean arterial pressure (MAP) is 108 mm Hg. What is the cerebral perfusion pressure (CPP)?
a. 54 mm Hg
b. 72 mm Hg
c. 90 mm Hg
d. 126 mm Hg
C
CPP = MAP – ICP. In this case, CPP = 108 mm Hg – 18 mm Hg = 90 mm Hg. All other calculated responses are incorrect.
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The patient is critically ill and the physician decides to use systemic arterial pressure monitoring. The purpose of this is to:
A) Assess left ventricular function B) Assess the pressure of the vena cava C) Assess the pressure in the right atrium D) Measure the patient's BP continually
When performing a venipuncture for a specimen, the nurse should:
a. select an arm in which an IV is infusing. b. apply the tourniquet 3 to 4 inches above the elbow. c. not palpate a distal pulse following application of the tourniquet. d. select a vein that is not dilated.
Once a qualitative study has been evaluated for credibility, transferability, dependability, and confirmability, the study is considered to be
a. generalizable. b. reliable. c. trustworthy. d. valid.
Y.W. is a 23-year-old male student from Thailand studying electrical engineering at the university. He was
ejected from a moving vehicle, which was traveling at 70 mph. His injuries included a severe closed head injury with an occipital hematoma, bilateral wrist fractures, and a right pneumothorax. During his neu rologic intensive care unit (NICU) stay, Y.W. was intubated and placed on mechanical ventilation, had a feeding tube inserted and was placed on tube feedings, had a Foley catheter placed, and had a central venous catheter (CVC) inserted for medication administration. Differentiate between primary and secondary head injury.