A nurse is caring for a client who is scheduled for a cesarean birth based on the fetal lungs having reached maturity. Which of the following indicates that the fetal lungs are mature?
Biophysical profile score of 8
Phosphatidylglycerol (PG) absent
Lecithin/sphingomyelin (L/S) ratio of 2:1
Nonstress test is reactive
The Correct Answer is C
Choice A reason: A biophysical profile score of 8 is a good indicator of fetal well-being, but it does not measure the fetal lung maturity. It consists of five parameters: fetal breathing movements, fetal movements, fetal tone, amniotic fluid volume, and nonstress test.
Choice B reason: Phosphatidylglycerol (PG) is a phospholipid that is present in the fetal lung surfactant. Its presence indicates that the fetal lungs are mature, while its absence does not rule out the possibility of maturity.
Choice C reason: Lecithin and sphingomyelin are two phospholipids that are found in the fetal lung surfactant. The L/S ratio is the ratio of lecithin to sphingomyelin in the amniotic fluid. A ratio of 2:1 or higher indicates that the fetal lungs are mature and can produce enough surfactant to prevent respiratory distress syndrome.
Choice D reason: A nonstress test is a test that measures the fetal heart rate and its response to fetal movements. A reactive test means that the fetal heart rate increases by at least 15 beats per minute for at least 15 seconds twice in a 20-minute period. This indicates that the fetus is healthy and well-oxygenated, but it does not reflect the fetal lung maturity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: HPV is a common STI that causes genital warts and can lead to cervical cancer. It can be transmitted by any sexual contact or by skin to skin contact. A vaccine is available to protect against some strains of HPV.
Choice B reason: Genital herpes is an STI that causes painful blisters and sores on the genitals. It can be transmitted by any sexual contact or by skin to skin contact. There is no vaccine for genital herpes, but antiviral medications can reduce the symptoms and frequency of outbreaks.
Choice C reason: Chlamydia is an STI that causes inflammation and discharge from the genitals. It can be transmitted by any sexual contact. There is no vaccine for chlamydia, but antibiotics can cure the infection.
Choice D reason: Gonorrhea is an STI that causes pain and discharge from the genitals. It can be transmitted by any sexual contact. There is no vaccine for gonorrhea, but antibiotics can cure the infection.
Correct Answer is C
Explanation
Choice A reason: CD4 counts are not used to detect HIV, but to monitor the progression of the infection and the immune system status. CD4 cells are a type of white blood cell that HIV targets and destroys. A normal CD4 count ranges from 500 to 1,500 cells per microliter of blood. A low CD4 count indicates a high risk of opportunistic infections and AIDS.
Choice B reason: Virus is a vague term that does not specify what kind of virus is being detected. HIV is a type of virus that belongs to the retrovirus family. It is difficult to detect the virus itself, as it hides inside the host cells and has a low concentration in the blood. Therefore, most laboratory tests focus on the antibodies that the body produces in response to the virus.
Choice C reason: HIV antibodies are the most common way to detect HIV, as they are produced by the immune system to fight the virus. Antibodies are proteins that bind to specific antigens (foreign substances) and mark them for destruction. HIV antibodies can be detected by a blood test, a saliva test, or a rapid test. However, antibodies may take several weeks to develop after exposure, so a negative test does not rule out the possibility of infection.
Choice D reason: CD8 counts are not used to detect HIV, but to monitor the immune system response and the viral load. CD8 cells are a type of white blood cell that kill infected cells and secrete antiviral substances. A high CD8 count indicates a strong immune response and a low viral load. A low CD8 count indicates a weak immune response and a high viral load.
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