The distribution of ultrasound cyclo plasty probe models in Chinese glaucoma patients

Abstract

Purpose To investigate the distribution of ultrasound cyclo plasty (UCP) probe models in Chinese glaucoma patients.Methods Patients need glaucoma surgery were recruited at Zhongshan Ophthalmic Center from January 2019 to December 2019. Patient demographics were recorded and analyzed. Visual acuity, intraocular pressure (IOP), retinal nerve fiber layer (RNFL), mean defect of visual field (MD), ocular axial length (AL) and horizontal corneal diameter (white to white, WTW) of eyes with glaucoma were measured and the UCP probe models were calculated by the use of nomogram tool and two ocular anatomical parameters: WTW and AL.Results 2000 eyes of 1281 patients were involved in this study, with 559 (43.64%) males and 722 (56.36%) females. The mean age is 61.43 ± 12.21 years old, ranged from 18 to 91. IOP ranged from 5.0 to 60.0 mmHg, with a mean of 20.07±10.71 mmHg. The mean AL and WTW are 22.96 ± 1.43 (ranged 19.07 to 35.00) and 11.55 ± 0.50 (ranged 9.6 to 13.7), respectively. According to the results calculated by nomogram tool, Chinese patients’ eyes are mainly adapted to the model 12, with a percentage of 69.05%. The model 13 and the model 11 are suitable for 26.65% and 3.35%, respectively. 0.95% of Chinese patients do not have a suitable probe model.Conclusion For Chinese patients who need glaucoma surgery, UCP probe models are mainly distributed in the model 12, followed by the model 13 and model 11 is the least used.