A nurse is reinforcing teaching about diagnostic tests with the parents of a child who has suspected cystic fibrosis. Which of the following diagnostic tests should the nurse include as the most definitive when diagnosing cystic fibrosis?
Pulmonary function test
Sweat chloride test
Stool fat content analysis
Sputum culture
The Correct Answer is B
A. Pulmonary function test:
Pulmonary function tests (PFTs) assess lung function by measuring airflow, lung volume, and gas exchange. While PFTs can provide valuable information about respiratory function, they are not specific to cystic fibrosis and may show abnormalities consistent with various respiratory conditions. However, PFTs are often performed in individuals with cystic fibrosis to monitor lung function over time and assess response to treatment. They are not considered the most definitive test for diagnosing cystic fibrosis.
B. Sweat chloride test:
This option is correct. The sweat chloride test is considered the most definitive diagnostic test for cystic fibrosis. It measures the concentration of chloride in sweat, which is typically elevated in individuals with cystic fibrosis due to defective chloride transport in sweat glands. A sweat chloride concentration above a certain threshold (usually ≥60 mmol/L) is diagnostic of cystic fibrosis, particularly when confirmed with repeat testing.
C. Stool fat content analysis:
Stool fat content analysis evaluates fat absorption and fecal fat excretion, which may be impaired in individuals with cystic fibrosis due to pancreatic insufficiency. However, while stool fat content analysis can provide supportive evidence of malabsorption in cystic fibrosis, it is not considered the most definitive test for diagnosing the condition. Stool fat content analysis is often used in conjunction with other diagnostic tests to assess pancreatic function and nutritional status in individuals with cystic fibrosis.
D. Sputum culture:
Sputum culture involves culturing respiratory secretions to identify bacterial pathogens, which can be useful for diagnosing respiratory infections in individuals with cystic fibrosis. However, sputum culture is not specific to cystic fibrosis and may show similar findings in other respiratory conditions. While respiratory cultures are important for guiding treatment in cystic fibrosis, they are not considered the most definitive test for diagnosing the condition.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. "I will use powders & lotion on his skin around the harness clasps."
This statement indicates a misunderstanding. Powders and lotions should generally be avoided around the harness clasps because they can interfere with the proper fit of the harness and cause irritation or discomfort to the baby's skin.
B. “I will remove the harness daily, prior to giving the bath.”
This statement is incorrect. The Pavlik harness is typically not removed for bathing, as it needs to be worn continuously to maintain proper positioning of the hips and promote optimal healing. Removing the harness daily for bathing can disrupt the treatment process and delay progress.
C. "I will adjust the harness straps every day."
This statement indicates a misunderstanding. The harness should not be adjusted daily without guidance from the healthcare provider. The straps of the Pavlik harness are initially adjusted by the healthcare provider to ensure proper fit, and they should remain in place without frequent adjustments to maintain stability and effectiveness.
D. "I will check my baby's skin under the straps frequently."
This statement indicates an understanding of the teaching. It is essential for the mother to regularly check her baby's skin under the harness straps for any signs of irritation, redness, or pressure sores. Monitoring the skin closely allows for early detection of any issues that may arise from wearing the harness.
Correct Answer is B
Explanation
A. "When I use this technique the medication will not run out of the ear."
This explanation is not entirely accurate. While pulling the auricle down and back may help prevent ear drops from immediately dripping out of the ear, the primary purpose of this technique is to straighten the ear canal, facilitating the passage of the medication into the inner ear region for optimal effectiveness. The prevention of medication runoff is a secondary benefit.
B. “This opens the ear canal, allowing medication to reach the inner ear region.”
This explanation is correct. Pulling the auricle down and back helps to straighten the ear canal, making it easier for the ear drops to enter the ear canal and reach the inner ear where they can effectively treat the condition. This is the main purpose of using this technique.
C. “This is the safest and easiest way to administer this medication.”
While pulling the auricle down and back is a commonly used technique for administering ear drops, describing it as the safest and easiest way may not fully capture its purpose. Safety and ease of administration are important considerations, but the primary rationale for this technique is to facilitate the delivery of medication to the inner ear.
D. “When I use the technique, your child experiences less pain.”
This explanation is inaccurate. Pulling the auricle down and back may not directly reduce pain. The main purpose of this technique is to ensure that the medication reaches the inner ear region for effective treatment. While discomfort during administration may be minimized with proper technique, the primary focus is on medication delivery rather than pain reduction.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today