Short-term Analysis of the Residual Volume of an Eye Drop Following 23-Gauge Microincision Vitrectomy Surgery
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Purpose: To evaluate the change of residual volume of eye drop after instillation in patients with 23-gauge microincisionvitrectomy surgery (MIVS). Methods: Patient who were treated 23-gauge MIVS from November 2014 to July 2015 were included. The residualvolume was defined as the amount of remnant eye drop in patient’s eyes after instillation, calculated as thedifference between instillation volume and spilled volume of eye drop. Calculation of residual volume of eyedrop was performed one day before surgery, and daily from postoperative day 1 to day 5. Results: Forty consecutive patients were included. The residual volume of eye drop decreased from 30.3 ± 1.4μL at baseline to 13.0 ± 1.5 μL at day 1, 18.3 ± 1.6 μL at day 2, 24.7 ± 1.5 μL at day 3, and 27.9 ± 1.4 μL in day 4,postoperatively (p < 0.001, respectively). The volume at postoperative day 5 was 29.4 ± 1.3 μL, but it was notdifferent from the volume at baseline (p = 0.105). The change of residual volume was significantly correlatedwith postoperative chemosis (r = 0.672, p < 0.001) and effected by the number of quadrant with postoperativechemosis (p < 0.05). Conclusions: This study shows that postoperative residual volume of eye drop after instillation decreased untilpostoperative day 4, and postoperative chemosis affects the change of residual volume. Thus, checkingproper use of eye drops and teaching about instillation technique by physician is necessary for patients with23-gauge MIVS.
Abstract
Purpose: To evaluate the change of residual volume of eye drop after instillation in patients with 23-gauge microincisionvitrectomy surgery (MIVS). Methods: Patient who were treated 23-gauge MIVS from November 2014 to July 2015 were included. The residualvolume was defined as the amount of remnant eye drop in patient’s eyes after instillation, calculated as thedifference between instillation volume and spilled volume of eye drop. Calculation of residual volume of eyedrop was performed one day before surgery, and daily from postoperative day 1 to day 5. Results: Forty consecutive patients were included. The residual volume of eye drop decreased from 30.3 ± 1.4μL at baseline to 13.0 ± 1.5 μL at day 1, 18.3 ± 1.6 μL at day 2, 24.7 ± 1.5 μL at day 3, and 27.9 ± 1.4 μL in day 4,postoperatively (p < 0.001, respectively). The volume at postoperative day 5 was 29.4 ± 1.3 μL, but it was notdifferent from the volume at baseline (p = 0.105). The change of residual volume was significantly correlatedwith postoperative chemosis (r = 0.672, p < 0.001) and effected by the number of quadrant with postoperativechemosis (p < 0.05). Conclusions: This study shows that postoperative residual volume of eye drop after instillation decreased untilpostoperative day 4, and postoperative chemosis affects the change of residual volume. Thus, checkingproper use of eye drops and teaching about instillation technique by physician is necessary for patients with23-gauge MIVS.
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