The nurse determines that this client’s priority problem is:

Choice A reason: This statement is true. Fluid volume deficit, or hypovolemia, is a condition where the body loses more fluid than it gains. It can be caused by fluid loss from vomiting, diarrhea, bleeding, or excessive sweating. Fluid volume deficit can lead to dehydration, hypotension, tachycardia, and shock.

Choice B reason: This statement is false. Sodium imbalance, or dysnatremia, is a condition where the blood sodium level is either too high or too low. It can be caused by fluid imbalance, kidney disease, hormonal disorders, or medications. Sodium imbalance can affect the brain function, causing confusion, seizures, or coma.

Choice C reason: This statement is false. Potassium imbalance, or dyskalemia, is a condition where the blood potassium level is either too high or too low. It can be caused by kidney disease, acid-base disorders, medications, or dietary intake. Potassium imbalance can affect the heart function, causing arrhythmias, cardiac arrest, or death.

Choice D reason: This statement is false. Fluid volume excess, or hypervolemia, is a condition where the body gains more fluid than it loses. It can be caused by fluid overload, heart failure, kidney failure, or liver disease. Fluid volume excess can lead to edema, hypertension, dyspnea, and pulmonary congestion.

Choice A reason: This statement is true. This client may have a high tolerance to opioids and require a higher dose for pain control, as tolerance is a condition where the body becomes less responsive to the effects of a drug over time, and needs more of the drug to achieve the same effect. Tolerance can develop from chronic or repeated use of opioids, and can vary from person to person. The nurse should assess the client's pain level, history of opioid use, and response to the medication, and adjust the dose accordingly.

Choice B reason: This statement is false. Clients with a history of opioid abuse should not be denied an opioid analgesic, as opioids are effective and appropriate medications for acute pain management, especially after surgery. The nurse should not discriminate or stigmatize the client based on their history of opioid abuse, but rather provide compassionate and evidence-based care. The nurse should also use a multimodal approach to pain management, which involves using non-opioid analgesics, adjuvant medications, and non-pharmacological interventions, such as ice, heat, massage, or relaxation techniques.

Choice C reason: This statement is false. This client should not wait until their pain is severe, 10/10 before taking a high dose opioid, as this can result in poor pain control, increased stress, and delayed recovery. The nurse should encourage the client to take the medication as prescribed, and to report their pain level regularly. The nurse should also educate the client about the benefits of preventive analgesia, which involves taking the medication before the pain becomes severe, and maintaining a steady blood level of the drug.

Choice D reason: This statement is false. The client's self-report of pain may not be disregarded if they have a history of opioid abuse, as pain is a subjective and personal experience, and the client is the best judge of their own pain. The nurse should not assume that the client is exaggerating, lying, or drug-seeking, but rather respect and validate the client's pain report. The nurse should also use objective indicators of pain, such as vital signs, facial expressions, body movements, and behavioral changes, to support the client's pain assessment.