The nurse is preparing to administer a histamine 2-receptor antagonist to a client with peptic ulcer disease. What is the primary purpose of this drug classification?

A. Neurological status: Assessing the neurological status is crucial in the primary survey to

determine the client's level of consciousness, pupil reactions, and response to stimuli. This helps in identifying any potential brain injury or neurological deficits resulting from the fall.

B. Circulation: Evaluating circulation involves assessing the client's heart rate, blood pressure, and peripheral perfusion. In this scenario, the client's heart rate and blood pressure are provided in the nurse's notes, indicating the need to assess circulation as part of the primary survey.

C. Current medications: While important for the overall assessment and care of the client, assessing current medications is typically part of the secondary survey rather than the primary survey. The primary survey focuses on immediate life-threatening conditions.

D. Allergies: While allergies are essential information for the client's overall care, they are typically addressed during the secondary survey or during the history-taking process rather than as part of the primary survey.

E. Exposure: Assessing exposure involves ensuring the client is adequately covered and protected from environmental factors, especially in trauma situations where there may be significant blood loss or risk of hypothermia. This includes removing clothing to assess for additional injuries or bleeding.

F. Ventilation: While ventilation is crucial for assessing the client's respiratory status, including respiratory rate and effort, it is typically part of the primary survey rather than the primary survey itself. Assessing ventilation helps determine if the client is adequately breathing and oxygenating.

Converting the weight to kg:
Client weight = 198 lbs 1 lb = 0.453592 kg

Client weight in kg = 198 lbs 0.453592 kg/lb = 90.7 kg
Calculating the desired dopamine infusion rate:
Dose = 2 mcg/kg/minute Client weight = 90.7 kg
Desired infusion rate = Dose Client weight = 2 mcg/kg/minute 90.7 kg = 181.4 mcg/minute

Determining the dopamine concentration in the bag:

Dopamine amount = 400 mg Bag volume = 250 mL
Dopamine concentration = Dopamine amount / Bag volume = 400 mg / 250 mL = 1.6 mg/mL
Convert mg/mL to mcg/mL: 1.6 mg/mL 1000 mcg/mg = 1600 mcg/mL

Calculating the rate in mL/minute:

Desired infusion rate = 181.4 mcg/minute Dopamine concentration = 1600 mcg/mL
Rate (mL/minute) = Desired infusion rate (mcg/minute) / Dopamine concentration (mcg/mL)
Rate = 181.4 mcg/minute / 1600 mcg/mL = 0.1134 mL/minute

Converting the rate to mL/hour:
Rate (mL/minute) = 0.1134 mL/minute Conversion factor: 60 minutes/hour
Rate (mL/hour) = 0.1134 mL/minute 60 minutes/hour = 6.8 mL/hour (round to nearest tenth)

Therefore, the nurse should set the IV pump to deliver approximately 6.8 mL/hour.