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NR 341 Exam #1: Questions & Correct Solutions (Pass!)
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NR 341 Exam #1: Questions & Correct Solutions (Pass!)
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NR 341 Exam #1: Questions & Correct Solutions (Pass!)pH levels Right Ans - 7.35-7.45
PaCO2 normal range Right Ans - 45-35
PaHCO3 normal range Right Ans - 22-26
PaO2 normal range Right Ans - 80-100
Uncompensated Right Ans - normal CO2 or HCO3
Fully compensated Right Ans - pH normal and both CO2 and HCO3 are
abnormal
Causes of Respiratory acidosis Right Ans - pneumonia, trauma
Tx of Respiratory Acidosis Right Ans - vigorous pulmonary toilet, ABX,
diuretics, mechanical ventilation
Causes of metabolic acidosis Right Ans - renal failure, ASA overdose,
ketoacidosis
Causes of respiratory alkalosis Right Ans - pain, fever, hyperventilation
Causes of metabolic alkalosis Right Ans - vomiting, diarrhea, prolonged
diuretics
-tx: K+ replacement, etc.
EKG: tiny box Right Ans - 0.04
EKG: big box Right Ans - 0.20
Big box method Right Ans - measure the R-R interval, count the number of
big boxes between & divide into 300
-can only do when regular strip
R on T phenomenon Right Ans - -leads to lethal dysrythmias
-PVC lands on relative refractory period
, 3 second strip Right Ans - R x 20
P wave Right Ans - atrial depolarization (contraction)
PR interval Right Ans - -0.12-0.20
-3-5 small boxes
Prolonged PR interval Right Ans - 1st degree AV block
QRS Right Ans - -ventricular depolarization
-0.06-0.10
-narrow = good
-wide = deceases perfusion to ventricles
QT interval Right Ans - -total ventricular activity
-0.33-0.44
- if over 0.50 = concerning from increased risk of going into cardiac
dysrhythmia
Meds that prolong QT Right Ans - haloperidol, zofran, anti-dysrhythmics
(amiodarone)
Absolute Refractory period Right Ans - -first half of T wave
-not enough repolarization so no stimulus can happen
Relative Refractory Period Right Ans - -second half of T wave
-enough cells have repolarized so response can happen
-R ot T
PVC's Causes Right Ans - -electrolyte imbalances
-ischemia
-hypoxia
-stimulants
-end stage heart failure
-medications
normal sinus rhythm (NSR) Right Ans - Rate: 60-100
Regular
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