ABSTRACT
Objective To compare the changes of intraocular pressure (IOP) in 24 hours between obstructive sleep apnea syndrome(OSAS) and the non-obstructive sleep apnea syndrome(non-OSAS).Methods Sixty patients with OSAS were divided into two groups:OSAS group(n =30) and non-OSAS group (n =30).The following indicators were detected:(1) Awake oxygen saturation ((HSaO2) ％),(2) The lowest oxygen saturation (LSaO2) ％) ; (3) Mean oxygen saturation ((MSaO2 ％)) ; (4) Oxygen desaturation index ((DI4),time/h:number of times that the hourly oxygen desaturation ≥ 4％) ; (5) The percentage of the time that oxygen saturation ≤ 90％ accounts the total time ((SIT90)％) and 24-hour IOP.IOP was measured from early morning 5:00 and measured once every four hours.The measurement results were compared between two groups.Results There was no significant difference on age ((62.60 ± 12.44) years old vs (65.20 ± 10.66)years old,t =1.48),Course of disease ((22.40 ± 6.88) month vs (25.49 ± 7.22) month,t =1.97),gender (The ratio of male to female is(20/10)vs (17/13),x2 =0.007) between the OSAS and the non-OSAS(P ＞0.05).Value of AHI(h-1) ((27.9 ±6.0) vs (2.5 ±1.1),t =8.78),LSaO2 ((74.7 ±11.7)％ vs (91.8 ±5.9)％,t=3.44),SIT90((13.2±12.4)％ vs(0.2±1.1)％,t=9.92) and ODI4(h-1) ((28.9 ±13.9)vs (6.1 ±4.1),t =8.09) of OSAS was significantly higher than that of non-OSAS(P ＜0.05 or P ＜0.01).Value of IOP of 21:00 o'clock((20.61±4.15)mm Hg vs(19.60 ± 4.03)mm Hg,t =2.18),1:00 o'clock((23.12 ±3.11)mm Hg vs (20.60 ± 3.29) mm Hg,t =4.64) and 5:00 o' clock ((22.82 ± 2.99)mm Hg vs (17.21 ±3.55) mm Hg,t =4.23) of OSAS was significantly higher than that of non-OSAS (P ＜ 0.05 or P ＜ 0.01).The wave ((10.40 ± 2.85)mm Hg vs (8.40 ± 2.55) mm Hg,t =4.15) and maximal ((23.60 ± 3.29) mm Hg vs (21.23 ±3.43)mm-Hg,t =2.60) value of IOP of OSAS was significantly higher than that of non-OSAS(P ＜0.05 or P ＜0.01).There was no significant difference on minimum of IOP between the OSAS and the non-OSAS ((13.20 ± 4.08)mm Hg vs (12.70 ± 4.22) mm Hg,t =0.54,P ＞ 0.05).Conclusion There are higher wave and maximal value of IOP in the patients of OSAS during the night.It is important to pay attention to IOP in order to protect those patients' visual function.