Nokea
The nurse monitors a client prescribed a thiazide diuretic for which clinical manifestations of hypokalemia? Select all that apply.
- A. Muscle twitches
- B. Deep tendon hyporeflexia
- C. Prominent U wave on ECG
- D. General skeletal muscle weakness
- E. Hypoactive to absent bowel sounds
- F. Tall T waves on electrocardiogram (ECG)
Correct Answer: B,C,D,E
Rationale: Hypokalemia is a serum potassium level less than 3.5 mEq/L. Clinical manifestations include ECG abnormalities such as ST depression, inverted T wave, prominent U wave, and heart block. Other manifestations include deep tendon hyporeflexia, general skeletal muscle weakness, decreased bowel motility and hypoactive to absent bowel sounds, shallow ineffective respirations and diminished breath sounds, polyuria, decreased ability to concentrate urine, and decreased urine specific gravity. Tall T waves and muscle twitches are manifestations of hyperkalemia.
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What action should the nurse take to assess the pharyngeal reflex on a child?
- A. Ask the client to swallow.
- B. Pull down on the lower eyelid.
- C. Shine a light toward the bridge of the nose.
- D. Stimulate the back of the throat with a tongue depressor.
Correct Answer: D
Rationale: The pharyngeal (gag) reflex is tested by touching the back of the throat with an object, such as a tongue depressor. A positive response to this reflex is considered normal. Asking the client to swallow assesses the swallowing reflex. To assess the palpebral conjunctiva, the nurse would pull down and evert the lower eyelid. The corneal light reflex is tested by shining a penlight toward the bridge of the nose at a distance of 12 to 15 inches (light reflection should be symmetrical in both corneas).
A client who has been diagnosed with carbon monoxide poisoning is asking that the oxygen mask be removed. The nurse shares with the client that the oxygen may be safely removed once the carboxyhemoglobin level decreases to less than which level?
- A. 5%
- B. 10%
- C. 15%
- D. 25%
Correct Answer: A
Rationale: Oxygen may be removed safely from the client with carbon monoxide poisoning once carboxyhemoglobin levels are less than 5%. Normal carboxyhemoglobin (HbCO) levels are 0% to 3% for nonsmokers and 3% to 8% for smokers. Levels of 10% to 20% cause headaches, nausea, vomiting, and dyspnea. Levels of 30% to 40% cause severe headaches, syncope, and tachydysrhythmias. Levels greater than 40% cause Cheyne-Stokes respiration or respiratory failure, seizures, unconsciousness, permanent brain damage, cardiac arrest, and even death. Options 2, 3, and 4 are elevated levels.
A client hospitalized with a diagnosis of thrombophlebitis is being treated with heparin infusion therapy. About 24 hours after the infusion has begun, the nurse notes that the client's partial thromboplastin time (PTT) is 65 seconds with a control of 30 seconds. What nursing action should the nurse implement?
- A. Discontinue the heparin infusion.
- B. Prepare to administer protamine sulfate.
- C. Notify the primary health care provider of the laboratory results.
- D. Include in report that the client is adequately anticoagulated.
Correct Answer: D
Rationale: The effectiveness of heparin therapy is monitored by the results of the PTT. Desired range for therapeutic anticoagulation is 1.5 to 2.5 times the control. A PTT of 65 seconds is within the therapeutic range. Therefore, options 1, 2, and 3 are incorrect actions.
The nurse determines that a client understands the purpose of a phytonadione injection for her newborn when she is heard making which statement to the baby's father?
- A. The baby's liver cannot produce that vitamin.
- B. Most newborns need a supplement of this vitamin.
- C. All newborns lack intestinal bacteria to produce this vitamin.
- D. It's unusual but our baby lack's the vitamin that helps the blood to clot.
Correct Answer: C
Rationale: The absence of normal flora needed to synthesize vitamin K (phytonadione) in the normal newborn gut results in low levels of vitamin K and creates a transient blood coagulation deficiency between the second and fifth day of life. An injection is administered prophylactically on the day of birth to combat the deficiency.
A coronary care unit (CCU) nurse is caring for a client admitted with acute myocardial infarction (MI). The nurse should monitor the client for which most common complication of MI?
- A. Heart failure
- B. Cardiogenic shock
- C. Cardiac dysrhythmias
- D. Recurrent myocardial infarction
Correct Answer: C
Rationale: Dysrhythmias are the most common complication and cause of death after an MI. Heart failure, cardiogenic shock, and recurrent MI are also complications but occur less frequently.