The relationship of tear osmolarity with tear meniscus curvature and contact angles in healthy subjects: anterior segment optical coherence tomography study.

PURPOSE: To evaluate the relationship of tear osmolarity (TO) with tear meniscus curvature and contact angles by anterior segment optical coherence tomography (AS-OCT) in healthy subjects. METHODS: The right eyes of 64 consecutive healthy subjects were included in the study. The eyes were scanned by AS-OCT for the measurements of upper and lower tear menisci. The geometrical components of the upper and lower menisci, including height, depth, area, and radius of the menisci, cornea-meniscus angle (α-angle), meniscus-eyelid angle (ß-angle), and curvature angle (θ-angle) were measured. TO was obtained by TearLab. All participants were administered Ocular Surface Disease Index questionnaires (OSDI), and tear film break-up time (TBUT), Schirmer I and II test measurements were also performed. RESULTS: There was no association of TO with height, depth, and area of both menisci while TO was negatively correlated to θ-angle and radius of the lower eyelid meniscus (r = - 0.41, P < 0.001 and r = - 0.40, P < 0.01, respectively). The θ-angle and the radius of the lower meniscus were also significantly associated with OSDI score, TBUT, Schirmer I and II (P < 0.01 for all). There was a statistically strong correlation between the θ-angle and the radius of the lower meniscus (r = 0.91, P < 0.001). CONCLUSION: The curvature angle and radius of the lower meniscus are significantly associated with TO. The curvature angle of the lower meniscus is a useful non-contact measure that may provide information indirectly about the osmolarity and the quality of the tear.

Rocuronium-sugammadex decreases the severity of post-electroconvulsive therapy agitation.

A 51-year-old male patient with a diagnosis of refractory major depressive disorder and unresponsive to antidepressants underwent 8 sessions of electroconvulsive therapy (ECT) every 48 hours. Succinylcholine was used for muscle relaxation until the sixth ECT session, and midazolam was administered for severe emergence agitation that recurred after each session. In the sixth ECT session, rocuronium, 0.4 mg/kg, was used for muscle relaxation and sugammadex, 2 mg/kg, for reversal of muscle paralysis. Subsequently, a clear decrease in post-ECT agitation was observed. We suggest that this combination might be a safe and effective alternative to succinylcholine for post-ECT agitation.