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The rate of endophthalmitis after pars plana vitrectomy and its risk factors.
International Ophthalmology 2019 June
PURPOSE: To study the incidence of endophthalmitis after pars plana vitrectomy, its causative organisms, and visual acuity outcomes.
PATIENTS AND METHODS: In this retrospective, comparative study, the medical records of patients with acute-onset postoperative endophthalmitis after pars plana vitrectomy at Farabi Eye Hospital, Tehran, Iran, during a 12-year period between January 2004 and November 2015 were reviewed. To compare the endophthalmitis patients with other cases who underwent pars plana vitrectomy at the same day and also the same operating room, a control group was developed by gathering the data from surgical records.
RESULTS: In the present study, the incidence rate of pos- vitrectomy endophthalmitis was 0.04% (16/39783). The organisms identified in aqueous or vitreous cultures (culture positive 44%) included Streptococcus pneumoniae (two patients, 12.5%), Pseudomonas aeruginosa (two patients, 12.5%), fungi (two patients, 12.5%), and Streptococcus viridans (one patient, 6.25%). Visual acuity after treatment for endophthalmitis ranged from light perception (7 eyes) to hand motion (1 eye), and evisceration was performed in 8 eyes (50%). When comparing the cases (patients developing endophthalmitis) and controls (patients with no complications operated in the same day and place of operation with the case group), only not using tamponade showed a statistically significant relation with the occurrence of endophthalmitis (p = 0.034).
CONCLUSION: Our results indicated low incidence of endophthalmitis after pars plana vitrectomy comparable to previous studies which resulted in poor visual acuity. It seems that not using tamponade might increase the risk of endophthalmitis among these patients.
PATIENTS AND METHODS: In this retrospective, comparative study, the medical records of patients with acute-onset postoperative endophthalmitis after pars plana vitrectomy at Farabi Eye Hospital, Tehran, Iran, during a 12-year period between January 2004 and November 2015 were reviewed. To compare the endophthalmitis patients with other cases who underwent pars plana vitrectomy at the same day and also the same operating room, a control group was developed by gathering the data from surgical records.
RESULTS: In the present study, the incidence rate of pos- vitrectomy endophthalmitis was 0.04% (16/39783). The organisms identified in aqueous or vitreous cultures (culture positive 44%) included Streptococcus pneumoniae (two patients, 12.5%), Pseudomonas aeruginosa (two patients, 12.5%), fungi (two patients, 12.5%), and Streptococcus viridans (one patient, 6.25%). Visual acuity after treatment for endophthalmitis ranged from light perception (7 eyes) to hand motion (1 eye), and evisceration was performed in 8 eyes (50%). When comparing the cases (patients developing endophthalmitis) and controls (patients with no complications operated in the same day and place of operation with the case group), only not using tamponade showed a statistically significant relation with the occurrence of endophthalmitis (p = 0.034).
CONCLUSION: Our results indicated low incidence of endophthalmitis after pars plana vitrectomy comparable to previous studies which resulted in poor visual acuity. It seems that not using tamponade might increase the risk of endophthalmitis among these patients.
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