The healthcare provider (HCP) prescribes dopamine 2 mcg/kg/min IV for client who weighs 60 kg. The IV bag contains "Dopamine 400 mg in dextrose 5% in water (DW) 500 mL." The nurse should program the infusion pump to deliver how many mL/hour? (Enter numerical value only.)
The Correct Answer is ["9"]
Calculation:
Calculate the dopamine dose in mcg/min:
Dose = 2 mcg/kg/min
Weight = 60 kg
Dose per minute = 2 mcg/kg/min × 60 kg
= 120 mcg/min
Calculate the dopamine dose in mcg/hour:
Dose per hour = 120 mcg/min × 60 min/hour
= 7200 mcg/hour
Convert mcg to mg:
Dose per hour = 7200 mcg/hour / 1000 mcg/mg
= 7.2 mg/hour
Calculate the concentration of dopamine in the IV bag:
Dopamine: 400 mg
Solution: 500 mL
Concentration = 400 mg / 500 mL
= 0.8 mg/mL
Calculate the infusion rate in mL/hour:
Dose per hour: 7.2 mg/hour
Concentration: 0.8 mg/mL
Infusion rate = 7.2 mg/hour / 0.8 mg/mL
= 9 mL/hour
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is []
Explanation
- Place the call light within the client's reach. The client has undergone surgery on the left hemisphere of the brain, which controls speech and motor function on the right side. This may lead to temporary weakness or speech difficulties, making it essential to ensure easy access to the call light for assistance.
- Use a word board to help the client communicate. Damage to the left hemisphere can result in Broca aphasia, where the client has difficulty producing speech but can still understand language. A word board or communication aid allows the client to express needs effectively despite speech limitations.
- Cerebral perfusion pressure. Monitoring cerebral perfusion pressure (CPP) is essential after brain surgery to ensure the brain is receiving adequate blood flow. Low CPP can lead to ischemia, while high CPP may indicate increased intracranial pressure (ICP), both of which can result in serious complications.
- Level of consciousness. Assessing neurological status frequently helps detect early signs of deterioration, such as worsening intracranial pressure, cerebral edema, or postoperative bleeding. Changes in alertness, responsiveness, or confusion may indicate a need for urgent intervention.
- Broca aphasia. Since the left hemisphere controls speech production, surgery in this area may cause Broca aphasia, where the client understands language but struggles to form words or complete sentences. The use of alternative communication methods is necessary to assist the client in expressing their needs.
- Prepare the client to return to surgery. There is no indication of complications requiring an immediate return to the operating room. The estimated blood loss (100 mL) is minimal, and vital signs remained stable throughout the procedure.
- Give ibuprofen as ordered. Ibuprofen (a nonsteroidal anti-inflammatory drug - NSAID) is contraindicated postoperatively because it can increase the risk of bleeding by inhibiting platelet function. Acetaminophen is typically preferred for pain control.
- Elevate the head of the bed to 45 degrees. After brain surgery, the head of the bed should be elevated to 30 degrees, not 45 degrees. This optimizes cerebral venous drainage while preventing excessive intracranial pressure (ICP) changes that could impair perfusion.
- White blood cell count. WBC count may be monitored for infection, but immediate concerns after brain surgery focus on neurological status and cerebral perfusion rather than infection unless symptoms of fever or worsening condition develop.
- Pupil response. While pupil assessment is a key neurological parameter, it is more relevant for clients at risk of brain herniation or severe ICP elevation. In this case, monitoring level of consciousness and cerebral perfusion pressure takes priority.
- Deep tendon reflexes. Reflex testing is not a primary concern after brain surgery unless there are signs of spinal cord involvement or a progressive neurological disorder. Monitoring motor function and speech ability is more relevant.
- Myasthenia gravis. Myasthenia gravis is an autoimmune neuromuscular disorder that causes muscle weakness but is unrelated to brain tumor removal.
- Cushing response. Cushing's response is a late sign of increased intracranial pressure (ICP), characterized by hypertension, bradycardia, and irregular respirations. The client has no signs of worsening ICP at this time.
- Hydrocephalus. Hydrocephalus is excess cerebrospinal fluid (CSF) accumulation, which typically requires a shunt or external ventricular drain (EVD). There is no indication of CSF buildup in this client.
Correct Answer is D
Explanation
A. Junctional tachycardia: Junctional tachycardia originates from the AV node, typically with a narrow QRS, absent or inverted P waves, and a rate of 100–180 bpm. The strip does not show these features.
B. Second-degree Type II AV block (3:1).Type II AV block (Mobitz II) shows dropped QRS complexes with constant PR intervals before conducted beats. This strip does not show missing QRS complexes in a 3:1 pattern.
C. Ventricular fibrillation. VF is characterized by a chaotic, disorganized rhythm with no discernible P waves, QRS complexes, or T waves, completely different from this organized flutter pattern.
D. Atrial flutter is characterized by regular, rapid atrial depolarizations (flutter waves) at a rate of 250–350 bpm. These waves create a "sawtooth" pattern on the ECG.The ventricular response may be regular or irregular, depending on AV conduction. This is different from atrial fibrillation (which has irregularly irregular R-R intervals and no discrete P waves).
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