A nurse is reviewing the EKG strip of a client who has prolonged vomiting. Which of the following abnormalities on the client's EKG should the nurse interpret as a sign of hypokalemia?
Inverted P wave
Wide ORS
Elevated ST segment
Abnormally prominent U wave
The Correct Answer is D
A. Inverted P wave: An inverted P wave may indicate atrial depolarization abnormalities but is not typically associated with hypokalemia. It can be seen in conditions such as atrial enlargement or atrial ischemia. However, in hypokalemia, the P wave may become flattened or have a decreased amplitude, but it is less likely to be inverted.
B. Wide QRS: A wide QRS complex may indicate conduction abnormalities or bundle branch blocks, but it is not specifically associated with hypokalemia. Wide QRS complexes are more commonly seen in conditions such as bundle branch blocks or electrolyte imbalances like hyperkalemia. Hypokalemia tends to cause a prolongation of the QT interval rather than widening of the QRS complex.
C. Elevated ST segment: An elevated ST segment is typically associated with myocardial injury or infarction, not hypokalemia. It can be indicative of conditions such as myocardial ischemia or pericarditis. In hypokalemia, ST segment changes are more likely to be flattened or depressed rather than elevated.
D. Abnormally prominent U wave: An abnormally prominent U wave is a classic EKG finding in hypokalemia. Hypokalemia prolongs the repolarization phase of the cardiac action potential, leading to the appearance of U waves following the T wave. These U waves can become more pronounced as potassium levels decrease. Therefore, an abnormally prominent U wave is a significant indicator of hypokalemia on an EKG, especially in a patient with prolonged vomiting, which can lead to potassium depletion. Thus, it is the most pertinent abnormality to interpret in this context.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Secure the restraints to the lowest bar of the side rail:
This is incorrect. Restraints should not be secured to the side rails of the bed because the client may injure themselves by attempting to climb over the side rail or if the bed adjusts, it can cause excessive pressure on the restrained limb.
B. Ensure four fingers under the restraints to prevent constriction:
This is incorrect. The nurse should be able to slide two fingers under the restraint to ensure it is not too tight, rather than four fingers. Restraining too loosely may allow the client to slip out, while restraining too tightly can cause tissue damage or compromise circulation.
C. Secure the restraints using a quick-release tie:
This is the correct action. Restraints should always have quick-release ties to allow for quick removal in case of an emergency or if the client needs to be repositioned or assisted. Velcro or buckle restraints with quick-release mechanisms are commonly used to ensure easy removal.
D. Anticipate removing the restraints every 4 hr:
While it's essential to regularly assess the need for continued restraint use and ensure restraints are not overly restrictive, there's no set time interval for removing restraints. Restraints should be removed as soon as they are no longer necessary to ensure the client's safety and comfort.
Correct Answer is ["B","D","E"]
Explanation
A. Fine hand tremors and pill rolling: These symptoms are more indicative of parkinsonism, which is another extrapyramidal side effect of antipsychotic medications but not specifically tardive dyskinesia.
B. Facial grimacing and eye blinking: Facial grimacing and eye blinking are classic signs of tardive dyskinesia. These involuntary movements of the face are often seen in patients who have been on antipsychotic medications for an extended period.
C. Urinary retention and constipation: Urinary retention and constipation are not typically associated with tardive dyskinesia. These symptoms may be related to other medication side effects or unrelated conditions.
D. Involuntary pelvic rocking and hip thrusting movements: These movements are characteristic of tardive dyskinesia. Involuntary pelvic rocking and hip thrusting can occur as part of the abnormal involuntary movements seen in tardive dyskinesia.
E. Tongue thrusting and lip smacking: Tongue thrusting and lip smacking are classic signs of tardive dyskinesia, particularly involving the orofacial region. These movements can be distressing for patients and may interfere with speech and eating.
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