Nokea
A nurse is directed to administer a hypotonic intravenous solution. The nurse expects that compensatory mechanisms associated with hypovolemia would cause all of the following symptoms except:
- A. O.45% sodium chloride
- B. 5% dextrose in water
- C. O.90% sodium chloride
- D. 5% dextrose in normal saline solution
Correct Answer: C
Rationale: The correct answer is C: 0.90% sodium chloride. When administering a hypotonic solution like 0.45% sodium chloride or 5% dextrose in water, water moves into the cells causing them to swell. This can exacerbate symptoms of hypovolemia such as low blood pressure and decreased perfusion. However, 0.90% sodium chloride is an isotonic solution and will not further exacerbate hypovolemic symptoms. Choices A, B, and D are hypotonic solutions that can worsen hypovolemic symptoms by causing cellular swelling.
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The nurse is caring for a client with diabetes insipidus. The nurse should anticipate the administration of:
- A. insulin.
- B. poatassium chloride.
- C. furosemide (Lasix)
- D. vasopressin (Pitressin).
Correct Answer: D
Rationale: The correct answer is D: vasopressin (Pitressin). In diabetes insipidus, there is a deficiency of antidiuretic hormone (ADH), which leads to excessive urination and thirst. Vasopressin is a synthetic form of ADH that helps regulate water balance by reducing urine output. Therefore, administering vasopressin would help manage the symptoms of diabetes insipidus. Insulin (A) is used for diabetes mellitus, not diabetes insipidus. Potassium chloride (B) is used to correct potassium imbalances, not specific to diabetes insipidus. Furosemide (Lasix) (C) is a diuretic that increases urine output, which would worsen the symptoms of diabetes insipidus.
Arthur, a 66-year old client for pneumonia has a temperature ranging from 39° to 40° C with periods of diaphoresis. Which of the following interventions by Nurse Carlos would be a priority?
- A. Administer oxygen therapy
- B. provide frequent linen changes
- C. provide fluid intake 3L/day
- D. maintain complete bed rest
Correct Answer: A
Rationale: The correct answer is A: Administer oxygen therapy. This is the priority intervention because a high temperature and diaphoresis indicate potential respiratory distress. Oxygen therapy can help improve oxygenation and support respiratory function. Providing frequent linen changes (B) is important for hygiene but not the priority. Fluid intake (C) is essential but not as urgent as addressing respiratory distress. Maintaining complete bed rest (D) may be necessary but addressing oxygenation takes precedence in this case.
A surgical intervention that can cause substantial remission of myasthenia gravis is:
- A. Esophagostomy
- B. Thymectomy
- C. Myomectomy
- D. Spleenectomy
Correct Answer: B
Rationale: The correct answer is B: Thymectomy. Thymectomy involves the surgical removal of the thymus gland, which is often abnormal in individuals with myasthenia gravis. The thymus plays a role in the development of the immune system and can contribute to the autoimmune response seen in myasthenia gravis. By removing the thymus gland, the autoimmune response may be reduced, leading to substantial remission of symptoms.
Choice A, Esophagostomy, involves creating a surgical opening into the esophagus and is not a treatment for myasthenia gravis. Choice C, Myomectomy, is the surgical removal of uterine fibroids and is unrelated to myasthenia gravis. Choice D, Spleenectomy, is the removal of the spleen and is not a standard treatment for myasthenia gravis.
The majority of lumbar disc herniations occur at the level of:
- A. L1 –L2
- B. L4-L5
- C. L3-L4
- D. S1-S2
Correct Answer: B
Rationale: The correct answer is B: L4-L5. This is because the L4-L5 intervertebral disc segment experiences the highest amount of mechanical stress and mobility in the lumbar spine, making it more prone to herniation. Additionally, nerve roots at this level innervate the lower extremities, making it a common site for symptoms such as sciatica. Choices A, C, and D are incorrect because herniations at those levels are less common due to lower mechanical stress and mobility compared to L4-L5.
Which of the following parts of neuron transmits impulses away from the cell body?
- A. Dendrite
- B. . Neurolemma
- C. Axon
- D. Synapse
Correct Answer: C
Rationale: The correct answer is C: Axon. The axon is the part of the neuron that transmits impulses away from the cell body towards other neurons, muscles, or glands. Its structure allows for the rapid transmission of electrical signals.
Rationale:
1. Dendrites receive signals and transmit them towards the cell body, so A is incorrect.
2. Neurolemma is the outermost layer of a Schwann cell, not a part of the neuron responsible for transmitting impulses, so B is incorrect.
3. The synapse is the junction between two neurons where communication occurs, not a part of the neuron transmitting impulses, so D is incorrect.