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Fat emulsions are frequently administered as a part of total parenteral nutrition. Which statement is true regarding fat emulsions?
- A. They have a high energy-to-fluid-volume ratio.
- B. Even though hypertonic, they are well tolerated.
- C. They are a basic solution due to the addition of sodium hydroxide (NaOH).
- D. The pH is alkaline, making them compatible with most medications.
Correct Answer: A
Rationale: The correct statement is that fat emulsions have a high energy-to-fluid-volume ratio. Fat emulsions are formulated in 10%, 20%, and 30% solutions and supply 1.1, 2, and 3 kilocalories, respectively, for each milliliter. In comparison, a milliliter of 5% dextrose only supplies 0.17 kilocalories. Choices B, C, and D are incorrect. Choice B is false because fat emulsions are essentially pH neutral and isotonic, not hypertonic. Choice C is incorrect because fat emulsions are not basic solutions; they are essentially pH neutral. Choice D is incorrect as fat emulsions are not alkaline; they are pH neutral, making them compatible with most medications.
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A hospitalized client has just been informed that he has terminal cancer. He says to the nurse, 'There must be some mistake in the diagnosis.' The nurse determines that the client is demonstrating which of the following?
- A. denial
- B. anger
- C. bargaining
- D. acceptance
Correct Answer: A
Rationale: The correct answer is denial. In this scenario, the client's statement indicates denial, which is a common reaction in Kübler-Ross's Stages of Grieving. Denial involves the refusal to accept or believe that a loss, such as a terminal illness diagnosis, is happening. Choices B, C, and D are incorrect: Anger involves feelings of resentment or frustration; Bargaining is an attempt to negotiate or make deals to avoid the situation; Acceptance is the final stage where the individual comes to terms with the reality of the situation.
Ashley and her boyfriend Chris, both 19 years old, are transported to the Emergency Department after being involved in a motorcycle accident. Chris is badly hurt, but Ashley has no apparent injuries, though she appears confused and has trouble focusing on what is going on around her. She complains of dizziness and nausea. Her pulse is rapid, and she is hyperventilating. The nurse should assess Ashley's level of anxiety as:
- A. mild.
- B. moderate.
- C. severe.
- D. panic.
Correct Answer: C
Rationale: Based on the symptoms described, Ashley's level of anxiety should be assessed as severe. In severe anxiety, individuals have difficulty solving problems and understanding their environment. They often exhibit somatic symptoms like dizziness, nausea, rapid pulse, and hyperventilation. In contrast, mild anxiety may lead to mild discomfort or even enhanced performance. Moderate anxiety involves grasping less information, mild difficulty in problem-solving, and slight changes in vital signs. Panic, on the other hand, is characterized by markedly disturbed behavior and a potential loss of touch with reality. Therefore, in Ashley's case, the presence of somatic symptoms and vital sign changes indicates severe anxiety.
The chemotherapeutic DNA alkylating agents such as nitrogen mustards are effective because they:
- A. cross-link DNA strands with covalent bonds between alkyl groups on the drug and guanine bases on DNA.
- B. have few, if any, side effects.
- C. are used to treat multiple types of cancer.
- D. are cell-cycle-specific agents.
Correct Answer: A
Rationale: Alkylating agents, such as nitrogen mustards, are effective chemotherapeutic agents because they cross-link DNA strands with covalent bonds between alkyl groups on the drug and guanine bases on DNA. This cross-linking interferes with DNA replication and transcription, leading to cell death. Choice B is incorrect because alkylating agents have numerous side effects, including alopecia, nausea, vomiting, and myelosuppression. Choice C is incorrect because while nitrogen mustards are used to treat multiple types of cancer like chronic lymphocytic leukemia, non-Hodgkin's lymphoma, and breast and ovarian cancer, their effectiveness is primarily due to DNA cross-linkage. Choice D is incorrect because alkylating agents are non-cell-cycle-specific agents, meaning they can act on cells in any phase of the cell cycle, not just on cells that are actively dividing.
A client reports hearing voices. What should the nurse do next?
- A. Touch the client to help him return to reality.
- B. Leave the client alone until reality returns.
- C. Ask the client to describe what is happening.
- D. Tell the client there are no voices.
Correct Answer: C
Rationale: When a client reports hearing voices, it might indicate hallucinations. It is essential for the nurse to ask the client to describe what is happening to gain a better understanding of the hallucinations. This approach helps in assessing the severity and content of the hallucinations, which can guide further interventions. Touching the client without consent can be intrusive and may escalate the situation, violating the client's personal space. Leaving the client alone may not address the underlying issue of hallucinations and can lead to potential risks if the client is distressed. Telling the client there are no voices denies their experience, invalidates their feelings, and can result in mistrust between the client and the nurse.
When assessing a client with glaucoma, a nurse expects which of the following findings?
- A. Complaints of double vision
- B. Complaints of halos around lights
- C. Intraocular pressure of 15 mm Hg
- D. Soft globe on palpation
Correct Answer: B
Rationale: When assessing a client with glaucoma, a common finding is complaints of halos around lights. Other symptoms of glaucoma include loss of peripheral vision or blind spots, reddened sclera, firm globe, decreased accommodation, and occasional eye pain. Glaucoma may be asymptomatic until permanent damage to the optic nerve and retina occurs. Double vision is not a typical symptom of glaucoma. In terms of intraocular pressure, normal levels range from 10 to 21 mm Hg, making an intraocular pressure of 15 mm Hg within the normal range. A soft globe on palpation is not a typical finding in glaucoma.