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[Efficacy of deproteinized calf blood extract eye drops on early recovery after pterygium surgery].

Objective: To investigate the effect of deproteinized calf blood extract eye drops on early postoperative recovery in primary pterygium patients. Methods: This is a prospective randomized controlled study. Patients diagnosed with primary pterygium in single eye at affiliated Xiamen Eye Center of Xiamen University during March 2016 to May 2016 were enrolled. After Pterygium excision with autologous conjunctival transplantation, patients were randomly assigned into four groups by a random number table, treated with anti-inflammaroty drugs only (control group) or combined with the following agents: deproteinized calf blood extract eye drops (DCBE group), carboxymethylcellulose sodium eye drops (CMC group), and recombinant human epidermal growth factor eye drops (rEGF group). Short-form McGill pain questionnaire, slit lamp and corneal fluorescein sodium staining, non-contact intraocular pressure, uncorrected visual acuity (UCVA) and best corrected visual acquity (BCVA) as well as redness score of bulbar conjunctiva were performed before surgery (d0) and on day 1 (d1), day 2 (d2), day 3 (d3), day 7 (d7) and day 14 (d14) after surgery. Results: One hundred and fourteen patients including 43 males and 71 females, aged (48.9±12.5) years, were eventually included in this study. The McGill scores gradually decreased after surgery in all groups. On d2, the McGill score in DCBE group, control group, CMC group and rEGF group was (1.42±0.67), (2.21±0.88), (1.93±1.08) and (1.77±1.18), respectively; On d3, the score was (1.32±0.54), (1.93±0.72), (1.79±0.87) and (1.52±0.77), respectively. On d2 and d3, statistical difference was recorded among groups (d2, F= 3.43, P= 0.019; d3, F= 4.047, P= 0.009), and the McGill score of DCBE group was significantly lower than that of CMC group (d2, P= 0.047, d3, P= 0.017). On d2, the percentage of corneal epithelium defect in DCBE group, control group, CMC group and rEGF group was 8.6%±1.9%, 11.7%±1.7%, 11.5%±1.9% and 10.4%±1.8%, respectively; On d3, the percentage was 4.5%±2.2%, 9.2%±2.4%, 7.4%±2.5% and 5.9%±2.3%, respectively. On d2 and d3, statistical difference of corneal epithelium defect percentage was recorded among groups (d2, F= 17.17, P< 0.001; d3, F= 21.4, P< 0.001). On d2, the percentage of corneal epithelium defect in DCBE group was significantly lower than the other three groups ( P< 0.01); On d3, the percentage of corneal epithelium defect in DCBE group was significantly lower than control group and CMC group ( P< 0.001), while no difference was found between DCBE group and rEGF group ( P> 0.05). However, no statistical differences were recorded in the number of patients with vision improvement among the groups ( P> 0.05). The intraocular pressure remained stable. No differences in the conjunctival redness score were found among the groups after surgery ( P> 0.05). Conclusion: Our data demonstrated the efficacy of deproteinized calf blood extract eye drops on the postoperative management in patients with primary patients, with faster pain relief and promoted epithelium recovery. (Chin J Ophthalmol, 2019, 55:134-140) .

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