What should the nurse do first when a client with a head injury begins to have clear drainage from the nose?

Choice A Reason: Placing an ice pack on the lips if they swell is not an appropriate instruction for a client who is taking allopurinol, as it may indicate an allergic reaction or angioedema, which requires immediate medical attention.

Choice B Reason: Using an OTC antihistamine lotion if a rash develops is not an appropriate instruction for a client who is taking allopurinol, as it may indicate a serious skin reaction such as Stevens-Johnson syndrome or toxic epidermal necrolysis, which requires immediate medical attention.

Choice C Reason: Drinking at least 8 glasses of fluid every day is an appropriate instruction for a client who is taking allopurinol, as it helps to prevent kidney stones and flush out uric acid from the body.

Choice D Reason: Taking the medication on an empty stomach 2 hours before meals is not an appropriate instruction for a client who is taking allopurinol, as it may cause stomach upset or nausea. The medication should be taken after meals with plenty of water.

Choice A Reason: Irrigating the fistula with 3 mL of normal saline solution is not a correct way to assess the patency of the fistula, as it may cause bleeding, infection, or dislodgement of the fistula.

Choice B Reason: Flushing the fistula with 1 mL of heparin solution once per shift is not a correct way to assess the patency of the fistula, as it may cause clotting, infection, or allergic reaction.

Choice C Reason: Infusing 50 mL of normal saline once per 24 hours is not a correct way to assess the patency of the fistula, as it may cause fluid overload, hypertension, or edema.

Choice D Reason: Palpating for a vibrating sensation at the fistula site is a correct way to assess the patency of the fistula, as it indicates that there is adequate blood flow through the fistula. This sensation is also known as a thrill.