Changes in hormones of the thyroid axis after tracheostomy and their influence on regeneration in patients with head and neck cancer: A prospective study.

This prospective study aimed to compare and evaluate changes in hormones of the thyroid axis affected by tracheostomy due to surgical treatment in patients with oral cancer. The patients were evaluated with regard to serum levels of the thyroid axis - free T3/triiodothyronine (fT3) and free T4/thyroxine (fT4), as well as thyroid-stimulating hormone (TSH) - at fixed perioperative time points: during the tumor staging about 1 week before operation, immediately before and within 6 h after operation, 2 days after operation, and about 10 days after operation. Additionally, data on the patients' characteristics (age, gender), relevant secondary diagnoses, duration of ventilation in the intensive care unit, and perioperative complications were obtained and analyzed. In total, 51 patients with an average age of 68.29 years (±11.82) were included. Analyses of thyroid hormones directly before and after tracheostomy showed a significant postoperative decrease in circulating TSH (p = 0.005) and fT3 (p < 0.001), whilst a significant increase in fT4 values (p < 0.001) was found. Nine patients showed perioperative complications, such as infection, emphysema, or requiring a revision operation. Eleven patients were diagnosed with a cardiac problem or suffered from agitation after operation. Within the limitations of the study it seems that hormonal changes following tracheostomy in critically ill patients should be monitored and thyroid hormone adjustment should be taken into account because the latter might lead to lower mortality and morbidity during hospitalization in these patients. CLINICAL TRIAL REGISTRATION NUMBER: DRKS00023942.