Kara Necip, Kenan Serhat
Department of Ophthalmology, Gaziantep University School of Medicine, Gaziantep, Turkey.
Int Ophthalmol. 2018 Jun;38(3):1205-1210. doi: 10.1007/s10792-017-0583-6. Epub 2017 Jun 9.
To evaluate the effect of the Valsalva maneuver (VM) on anterior segment parameters and its association with refractive status.
In this prospective study, 120 eyes of 120 subjects were evaluated. Subjects were divided into three groups: myopic (n = 40 patients), hyperopic (n = 40 patients), and emmetropic (control group, n = 40 subjects). The anterior segment parameters, including keratometric, pachymetric, and anterior chamber parameters, were measured using the Sirius System (Costruzione Strumenti Oftalmici, Florence, Italy) before and during VM.
There was no statistically significant difference in corneal parameters including keratometric and pachymetric values at rest or during VM in myopic, hyperopic, and control groups (p > 0.05 for all). In the myopic and control groups, anterior chamber depth, anterior chamber volume (ACV), and anterior chamber angle (ACA) were significantly decreased during VM. In the hyperopic group, only anterior chamber depth was significantly decreased during VM, while ACV and ACA did not significantly change.
The Valsalva maneuver may cause significant narrowing in anterior chamber depth, anterior chamber volume, and anterior chamber angle in the myopic and emmetropic groups, whereas it may affect only anterior chamber depth in the hyperopic group.
评估瓦尔萨尔瓦动作（VM）对眼前节参数的影响及其与屈光状态的关联。
在这项前瞻性研究中，对120名受试者的120只眼睛进行了评估。受试者被分为三组：近视组（40例患者）、远视组（40例患者）和正视对照组（40名受试者）。使用Sirius系统（意大利佛罗伦萨的Costruzione Strumenti Oftalmici公司）在VM动作前和动作过程中测量眼前节参数，包括角膜曲率、角膜厚度和前房参数。
近视组、远视组和对照组在静息状态或VM动作过程中的角膜参数（包括角膜曲率和角膜厚度值）无统计学显著差异（所有p>0.05）。在近视组和对照组中，VM动作期间前房深度、前房容积（ACV）和前房角（ACA）显著减小。在远视组中，VM动作期间仅前房深度显著减小，而ACV和ACA无显著变化。
瓦尔萨尔瓦动作可能导致近视组和正视组的前房深度、前房容积和前房角显著变窄，而在远视组中可能仅影响前房深度。
