Hi,
A Free T4 level of 4.02 ng/dL is slightly above the normal range, which is typically around 0.8 to 1.8 ng/dL. However, it's important to note that normal ranges can vary depending on the laboratory, the testing method, and other factors.
In the case of your wife who has Graves' disease, this elevated Free T4 level may indicate that her
hyperthyroidism is not adequately controlled. It's possible that her thyroid doctor may need to adjust her medication dosage or consider other treatment options.
It's unlikely that your wife needs to go to the ER, as this is not an emergency situation. However, if she experiences severe symptoms such as
chest pain,
shortness of breath, or confusion, then it would be appropriate to seek immediate medical attention. Otherwise, she can wait until tomorrow morning to see her thyroid doctor.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. H. Kay, General & Family Physician