The healthcare provider prescribes heparin 18 units/kg/hr IV for a client who weighs 154 Ibs to prevent deep vein thrombosis (DVT). The premixed IV solution is labeled "Heparin Sodium 20,000 Units in Dextrose 5% in Water (D5W) 500 mL". The nurse should program the infusion pump to deliver how many mL/hr? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["31.5"]
Calculation
- Convert Patient Weight from Pounds (lbs) to Kilograms (kg)
Weight in kg = 154 lbs / 2.2 kg/lb
= 70 kg
- Calculate the Ordered Dose in Units per Hour (Units/hr)
Ordered Dose (Units/hr) = 18 units/kg/hr x 70 kg
= 1,260 units/hr
- Determine the Concentration of the IV Solution (Units/mL)
Concentration (Units/mL) = 20,000 units / 500 mL
= 40 units/mL
- Calculate the Flow Rate (mL/hr)
Flow Rate (mL/hr) = Ordered Dose (Units/hr) / Concentration (Units/mL)
= 1,260 units/hr / 40 units/mL
= 31.5
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. Skeletal traction misalignment: While misalignment can cause discomfort and complications in spinal cord injury clients, it is not the most common or immediate trigger of autonomic dysreflexia. Assessment of alignment is secondary to more urgent causes of sympathetic overactivity.
B. Profuse forehead diaphoresis: Sweating is a symptom of autonomic dysreflexia but is a manifestation rather than a precipitating factor. Identifying the cause of the dysreflexia takes priority over treating symptoms alone.
C. An acutely distended bladder: Bladder distension is the most common precipitating factor for autonomic dysreflexia in clients with lesions at T6 or above. Immediate assessment and relief of urinary retention are critical to prevent severe hypertension, stroke, or other life-threatening complications.
D. A severe pounding headache: Headache is a classic symptom of autonomic dysreflexia, reflecting elevated blood pressure. While important to recognize, it indicates the presence of the condition rather than identifying the cause that must be addressed first.
Correct Answer is C
Explanation
Rationale:
A. Bronchoscopy: Bronchoscopy is used to visualize the airways or remove obstructions, but it does not immediately resolve absent breath sounds caused by pneumothorax or hemothorax. It is not the first-line emergency intervention in this scenario.
B. Pulmonary function test: Pulmonary function tests evaluate lung capacity and airflow but are not used in acute trauma or life-threatening respiratory compromise. They are inappropriate for emergency management of absent breath sounds.
C. Chest tube insertion: Absent breath sounds on one side after trauma suggest a pneumothorax or hemothorax. Chest tube insertion evacuates air or fluid from the pleural space, re-expands the lung, and restores effective ventilation, making it the priority intervention.
D. Endotracheal intubation: Intubation may be necessary if the client cannot maintain oxygenation or ventilation. While supportive, it does not address the underlying cause of absent breath sounds, which requires chest tube placement to relieve the pneumothorax or hemothorax.
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