Results
hypoparathyroidism, papillary thyroid carcinoma
PATHOLOGY, HYPOPARATHYROIDISM, PAPILLARY THYROID CARCINOMA
In total, 50 patients were included in each group (Demographics for the 100 patients with papillary thyroid carcinoma in this study.Statistics for the parathyroid gland parameters in the two groups.In the NIRAF group, 41.2% (right) and 32.0% (left) of the superior parathyroid glands were present in a safe phase (P1+P2), whereas in the control group, only 6.0% (right) and 10.0% (left) of the glands were in this phase (p<0.001, χDifferent stages of parathyroid gland discovery in the NIRAF group and control group. Blue and green bars were basically safe phases, and the blood supply vessels in the parathyroid glands remained intact. Yellow and brownish yellow bars were the last stages of gland disconnection, and the blood supply vessels might be at risk. The red bars indicate that the blood supply to the parathyroid gland was at a critical stage during lymph node dissection. Black and gray bars indicate that the parathyroid gland had been isolated or identified in paraffin pathology. The brown bars indicate that the parathyroid gland was not located.There was no significant difference in the mean PTH and serum calcium levels between the two groups before surgery (p=0.952, t=0.061 and p=0.676, t=-0.419, respectively). On the first postoperative day, the mean value of PTH in the NIRAF group was 21.70 pg/mL, whereas that in the control group was 11.44 pg/mL (p<0.001, Z=-3.489). The average PTH level in the NIRAF group decreased to 38.1% of the preoperative level and that in the control group decreased to 20.0% of the preoperative level (p<0.001, Z=-3.547). On the first postoperative day, the mean value of blood calcium in the NIRAF group was 2.22 mmol/L, whereas that in the control group was 2.15 mmol/L (p=0.017, Z=-2.397). The incidences of temporary hypoparathyroidism (p=0.005, χLevels of parathyroid hormone and blood calcium before and after surgery.On the third postoperative day, the PTH level in 74% of patients in the NIRAF group had recovered to normal levels, whereas only 38% of patients in the control group had recovered (p<0.001, χTime for PTH recovery to the normal reference range in the two groups after surgery.