Correct Answer: B

Rationale: The correct answer is to ensure the drainage bag is positioned above the bladder. This positioning prevents urine reflux into the bladder, reducing the risk of catheter-associated infections. Changing the catheter too frequently (Choice A) can actually increase the risk of infection by introducing pathogens. Performing routine catheter irrigation (Choice C) is no longer recommended as it can increase the risk of infection by introducing bacteria. Emptying the drainage bag every 4 hours (Choice D) is a standard practice to prevent urinary stasis but is not directly related to preventing catheter-associated infections.

Correct Answer: D

Rationale: Cheddar cheese is high in phosphorus, which should be avoided by clients with chronic kidney disease. Fresh fruit is generally a healthy choice unless the client needs to limit potassium intake. Grilled chicken is a good protein source for clients with chronic kidney disease. White bread is low in phosphorus and can be included in the diet of clients with kidney disease unless they need to watch their carbohydrate intake.

Correct Answer: C

Rationale: The correct action the nurse should include for a client with thrombocytopenia is to provide a stool softener. Thrombocytopenia is a condition characterized by a low platelet count, which can lead to an increased risk of bleeding. Providing a stool softener helps prevent constipation, straining, and subsequent bleeding, which is crucial for clients with thrombocytopenia. Encouraging the client to floss daily (Choice A) is important for oral hygiene but not directly related to thrombocytopenia. Removing fresh flowers from the client's room (Choice B) is more related to infection control than managing thrombocytopenia. Avoiding serving raw vegetables (Choice D) is important for clients with compromised immune systems to reduce the risk of foodborne illnesses but is not directly related to thrombocytopenia management.

Correct Answer: B

Rationale: The correct answer is B: Serotonin syndrome. Serotonin syndrome can occur due to the interaction between citalopram, an SSRI, and St. John's Wort, an herbal supplement. Symptoms of serotonin syndrome include confusion, agitation, rapid heart rate, high blood pressure, dilated pupils, loss of muscle coordination, and sweating. Choices A, C, and D are incorrect as they are not typically associated with the interaction between citalopram and St. John's Wort. Tardive dyskinesia is a movement disorder associated with long-term use of certain medications, pseudoparkinsonism is a side effect of certain antipsychotic medications, and acute dystonia is a movement disorder caused by certain medications like antipsychotics.

Correct Answer: B

Rationale: The correct answer is B: Ataxia. Ataxia, which refers to uncoordinated movements, is a common adverse effect of phenytoin, a medication used to manage seizure disorders. Bradycardia (Choice A) is not typically associated with phenytoin; instead, it may cause tachycardia (Choice C) as a side effect. Insomnia (Choice D) is not a common adverse effect of phenytoin.