Objective To explore the accuracy and efficiency of indocyanine green fluorescence (ICGF) imaging in evaluating blood perfusion of parathyroid gland (PG) during total thyroidectomy. Methods Seventy patients who underwent total thyroidectomy and bilateral central lymph node dissection for papillary thyroid carcinoma (PTC) from March 2021 to December 2021 were enrolled and randomly divided into experimental group (ICGF imaging, n=35) and control group (normal treatment, n=35). Blood perfusion of PGs was evaluated by ICGF imaging and naked eye in each group respectively. The perfusion of PGs, incidence of hypoparathyroidism, and number of autotransplanted PGs were analyzed between the two groups. Results There was no difference between two groups in the incidence of transient hypoparathyroidism (P=0.339), and no one occurred permanent hypoparathyroidism. More PGs were autotransplanted in the experimental group compared to the control group (P＜0.001). At least one PG with good perfusion in the experimental group predicted an extremely high rate of normal parathyroid hormone levels of the patients postoperatively than the control group (P=0.003). Conclusion ICGF imaging can evaluate the blood perfusion of PGs accurately and guide their autotransplantation.
ObjectiveTo investigate the effectiveness of probe-based near infrared autofluorescence (AF) technology in the identification and functional protection of parathyroid gland (PG) during endoscopic total thyroidectomy. MethodsWe retrospectively collected the clinical data of 160 patients who underwent total thyroidectomy with bilateral central compartment lymph node dissection due to papillary thyroid carcinoma in Chongqing General Hospital from 1 July 2023 to 31 January 2024. Among them, 80 patients who used probe-based near infrared AF technology to identify the PGs were categorized as the AF group, 80 patients who used naked eye (NE) to identify the PGs were categorized as the NE group. The number of PGs identified, inadvertently removed, preserved in situ and autotransplanted, the incidence of postoperative hypoparathyroidism, and operative time were compared between the two groups. ResultsThe incidence of transient hypoparathyroidism was significantly lower in the AF group than that of the NE group [21.25% (17/80) vs. 43.75% (35/80), χ2=9.231, P=0.002], with no cases of permanent hypoparathyroidism in either group. The AF group had significantly more PGs identified and preserved in situ than the NE group (P<0.05) , but had significantly fewer PGs inadvertently removed and autotransplanted than the NE group (P<0.05). The AF group identified the first PG earlier than the NE group (4 min vs. 5 min, P<0.001. But there was no statistically difference in the operative time between the two groups (90 min vs. 94 min, P=0.052). ConclusionThe probe-based near infrared AF technology can help surgeons better identify and protect PGs during surgery, reducing the incidence of postoperative transient hypoparathyroidism.