A nurse is instructing a school-age child who has asthma about the use of a peak expiratory flow meter.
Which of the following instructions should the nurse include in the teaching?
Maintain a semi-Fowler’s position during testing
Place tongue on the mouthpiece of the meter
Blow into the meter as hard and quickly as possible
Record the average of the readings
The Correct Answer is C
The correct answer is choice C. Blow into the meter as hard and quickly as possible.
This is because a peak flow meter measures how fast you can push air out of your lungs when you blow out as hard and as fast as you can.
This is called peak expiratory flow rate (PEFR) or peak expiratory flow (PEF). It shows how open the airways are in the lungs and can help detect early signs of worsening asthma.
Choice A is wrong because maintaining a semi-Fowler’s position during testing is not necessary. You can sit or stand up straight, but make sure you do it the same way each time.
Choice B is wrong because placing tongue on the mouthpiece of the meter can block the air flow and affect the accuracy of the measurement. You should close your lips tightly on the mouthpiece instead.
Choice D is wrong because recording the average of the readings is not recommended.
You should record the highest of the three readings on a sheet of paper, calendar or in your asthma diary. This is your daily peak flow.
Normal ranges for peak flow vary depending on age, height, gender and race. You can use a chart or calculator to find out your predicted normal peak flow based on these factors. However, it is more important to find out your personal best peak flow by performing peak flow testing twice a day for two weeks when your asthma is under good control. Your personal best peak flow will be used to create your asthma action plan with your healthcare provider.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The correct answer is choice A, hematuria.
Hematuria is the presence of red blood cells in the urine, which can make it appear pink or cola-colored. Hematuria is a common sign of glomerulonephritis, which is inflammation of the tiny filters in the kidneys (glomeruli) that remove waste and excess fluid from the blood.
Hematuria occurs because the inflamed glomeruli allow some blood cells to leak into the urine.
Choice B, polyuria, is wrong because polyuria is the production of abnormally large amounts of urine. Polyuria is not a typical feature of acute glomerulonephritis, which may actually cause reduced urine output due to fluid retention and decreased kidney function.
Choice C, weight loss, is wrong because weight loss is not a common symptom of acute glomerulonephritis. On the contrary, weight gain may occur due to fluid retention and edema (swelling) in the face, hands, feet and abdomen.
Choice D, hypotension, is wrong because hypotension is low blood pressure. Hypotension is not usually associated with acute glomerulonephritis, which may cause high blood pressure (hypertension) due to fluid overload and impaired sodium excretion by the kidneys.
Normal ranges for blood pressure are less than 120/80 mmHg for adults.
Normal ranges for urine output are about 800 to 2000 mL per day for adults.
Normal ranges for protein in the urine are less than 150 mg per day for adults. Normal ranges for red blood cells in the urine are less than 3 per high-power field for men and less than 5 per high-power field for women.
Correct Answer is B
Explanation
The correct answer is B.
Choice A reason: Atrial fibrillation is characterized by a rapid, irregular heartbeat and an absence of distinct P waves on the ECG, which is not indicated by the information provided.
Choice B reason: First-degree AV block is indicated by a prolonged PR interval without affecting the overall heart rate, aligning with the client’s PR interval of 0.24 seconds.
Choice C reason: Premature ventricular contraction would show an abnormal QRS complex on the ECG, which is not mentioned in the scenario.
Choice D reason: Sinus bradycardia is defined by a heart rate less than 60 bpm, which does not apply here as the client’s heart rate is 69/min, within the normal range of 60-100 bpm.
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