RT Journal Article SR Electronic T1 Use of saliva flow rate measurement in minor salivary glands autotransplantation for treatment of severe dry eye disease JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP bjophthalmol-2020-317552 DO 10.1136/bjophthalmol-2020-317552 A1 Jia-Zeng Su A1 Zhen Wang A1 Xiao-Jing Liu A1 Lan Lv A1 Guang-Yan Yu YR 2021 UL http://bjo.bmj.com/content/early/2021/03/05/bjophthalmol-2020-317552.abstract AB Aims To use minor salivary glands’ flow rate (MSGFR) measurement in minor salivary glands (MSGs) autotransplantation for the treatment of severe dry eye disease (DED).Methods MSGs autotransplantations were performed in 18 eyes (17 patients) with severe DED. MSGFR were measured before operation. The upper or lower lip with higher MSGFR was selected as the donor site. Buccal mucosa was the back-up in cases labial MSGs showing markedly decreased MSGFRs. Two pieces of salivary lobules with the covering mucosa were harvested and transplanted to the recipient beds prepared in both upper and lower lids.Results The donor sites included lower lip in 12 eyes, upper lip in 5 eyes and buccal mucosa in 1 eye. Postoperative follow-up confirmed viable grafts in all cases. The overall subjective relief rate of DED symptoms was 58.8%, with Schirmer test values increasing from 0 mm to 4 mm (p<0.05). The mean preoperative MSGFR was 1.7 (range: 0.9–3.3) µL/min/cm2. ROC analysis indicated an outstanding discrimination power for preoperative MSGFR to predicate postoperative relief of DED symptoms (area under the curve (AUC)=0.948, p<0.01). The maximum sensitivity (100%) and specificity (72.7%) were reached at a cut-off of 1.785 µL/min/cm2. Patients with preoperative MSGFR >1.785 µL/min/cm2 showed greater improvement of Schirmer test values after surgery than those with MSGFR ≤1.785 µL/min/cm2 (p<0.05).Conclusion MSGs transplantation proved to be useful for treating severe DED. The amount of postoperative lubrication and the treatment effect were positively correlated with preoperative MSGFR. MSGFR measurement and donor-site selection should be critical steps before the operation.