a heparin infusion is prescribed for a client who weighs 220 pounds after administering a bolus dose of 80 unitskg the nurse calculates the infusion r

HESI LPN

CAT Exam Practice Test

1. A heparin infusion is prescribed for a client who weighs 220 pounds. After administering a bolus dose of 80 units/kg, the nurse calculates the infusion rate for the heparin sodium at 18 units/kg/hour. The available solution is Heparin Sodium 25,000 units in 5% Dextrose Injection 250 ml. The nurse should program the infusion pump to deliver how many ml/hour?

A. 18
B. 27
C. 36
D. 45

Correct answer: B

Rationale: To calculate the infusion rate, first, find the total dose required per hour, which is the patient's weight (220 pounds) multiplied by the prescribed rate (18 units/kg/hour). This equals 3960 units/hour. Next, determine how many ml of the solution contain 25,000 units; this is 250 ml. Divide the total dose required per hour (3960 units) by the units per ml (25,000 units/250 ml) to find how many ml are needed per hour. This results in 27 ml/hour. Therefore, the nurse should program the infusion pump to deliver 27 ml/hour. Choice A (18) is incorrect as it does not account for the concentration of the heparin solution. Choices C (36) and D (45) are incorrect as they do not reflect the accurate calculations based on the patient's weight and the heparin concentration in the solution.

2. A newborn whose mother is HIV positive is admitted to the nursery from labor and delivery. Which action should the nurse implement first?

A. Initiate treatment with zidovudine (ZDV) syrup at 2 mg per kg
B. Bathe the infant with dilute chlorhexidine (Hibiclens) or soap
C. Measure and record the infant's frontal-occipital circumference
D. Administer vitamin K (AquaMEPHYTON) IM in the vastus lateralis

Correct answer: B

Rationale: The correct first action for a newborn potentially exposed to HIV is to bathe the infant with dilute chlorhexidine or soap. This helps reduce the risk of infection. Initiating treatment with zidovudine would be important but not the first priority. Measuring and recording the infant's frontal-occipital circumference and administering vitamin K are important tasks but are not the priority when dealing with potential HIV exposure. Immediate hygiene measures are crucial to minimize the risk of transmission.

3. The nurse is assessing a first-day postpartum client. Which finding is most indicative of a postpartum infection?

A. Oral temperature of 100.2°F (37.9°C)
B. Blood pressure of 122/74 mmHg
C. Moderate amount of foul-smelling lochia
D. White blood count of 19,000/mm³ (19x10^9/L SI units)

Correct answer: C

Rationale: A foul-smelling lochia is indicative of a postpartum infection, such as endometritis. Foul-smelling lochia suggests the presence of infection due to the breakdown of tissue by bacteria, leading to the malodor. An oral temperature elevation and an elevated white blood cell count are nonspecific and can be present in various conditions other than postpartum infections, making them less indicative. A blood pressure within normal limits is not typically associated with postpartum infections.

4. After years of struggling with weight management, a middle-aged man is evaluated for gastroplasty. He has experienced difficulty managing his diabetes mellitus and hypertension, but he is approved for surgery. Which intervention is most important for the nurse to include in this client’s plan of care?

A. Monitor for signs of depression
B. Apply sequential compression stockings
C. Provide a wide variety of meal choices
D. Observe for signs of depression

Correct answer: D

Rationale: Observing for signs of depression is crucial in this patient's plan of care as depression can impact his overall recovery and management post-surgery. Depression is common in individuals struggling with weight management, diabetes mellitus, and hypertension. Monitoring for urinary incontinence (Choice A) is not the priority in this case as the patient is undergoing gastroplasty for weight management, not a urinary issue. Applying sequential compression stockings (Choice B) is important for preventing deep vein thrombosis in immobile patients but is not the priority in this scenario. Providing a wide variety of meal choices (Choice C) is not the most crucial intervention at this stage, as post-gastroplasty dietary restrictions are essential for successful weight management.

5. Following rectal surgery, a female client is very anxious about the pain she may experience during defecation. The nurse should collaborate with the healthcare provider to administer which type of medication?

A. Bulk-forming agent
B. Antianxiety agent
C. Stool softener
D. Stimulant cathartic

Correct answer: C

Rationale: After rectal surgery, a stool softener is the most appropriate medication to help prevent pain and straining during defecation. Stool softeners work by increasing the water content of the stool, making it easier to pass without discomfort. Bulk-forming agents (Choice A) help add mass to the stool but may not address the immediate post-operative discomfort. Antianxiety agents (Choice B) would address the anxiety but not the physical discomfort. Stimulant cathartics (Choice D) are not recommended after rectal surgery as they can cause cramping and increased bowel movements, potentially exacerbating pain.