A breastfeeding infant, screened for congenital hypothyroidism, is found to have low levels of thyroxine (T4) and high levels of thyroid stimulating hormone (TSH). Which is the best explanation for this finding?
The TSH is high because of the low production of T4 by the thyroid.
The thyroxine level is low because the TSH level is high.
The thyroid gland does not produce normal levels of thyroxine for several weeks after birth.
High thyroxine levels normally occur in breastfeeding infants.
The Correct Answer is A
In a normal infant, T4 levels increase after birth due to stimulation by TSH from the pituitary gland. In this case, the T4 level is low and the TSH level is high, indicating that the thyroid gland is not producing enough T4 in response to TSH stimulation. This suggests that the infant may have congenital hypothyroidism, which requires prompt treatment to prevent developmental delays and other complications.
The low T4 level is not a direct cause of the high TSH level; rather, the high TSH level is a compensatory mechanism to increase T4 production. It is not normal for a breastfeeding infant to have high thyroxine levels. While the thyroid gland may take a few weeks to reach normal function after birth, the persistent low T4 and high TSH levels in this infant suggest a more serious issue.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
When moving an adolescent with scoliosis who is recovering after a surgical spinal instrumentation, the nurse should use the log roll technique. This technique involves keeping the spine in alignment while turning the client onto their side. Crossing the arms and legs, raising the hips, and flexing the knees are not appropriate techniques for moving a client with spinal instrumentation.
Correct Answer is ["1.8"]
Explanation
The nurse should administer 1.8 mL of diazepam.
To calculate the volume of diazepam to be administered, you would first calculate the total dose of diazepam for this child by multiplying the child's weight (30 kg) by the prescribed dose (0.3 mg/kg). This calculation gives a total dose of 9 mg (30 kg x 0.3 mg/kg = 9 mg). Next, you would divide the total dose (9 mg) by the concentration of the medication (5 mg/mL) to determine the volume to be administered. This calculation gives a volume of 1.8 mL (9 mg / 5 mg/mL = 1.8 mL).
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