BACKGROUND: To evaluate the effect of the Valsalva maneuver (VM) on short-term variations of intraocular pressure (IOP) and ocular pulse amplitude (OPA) values in healthy, young, male subjects. METHODS: IOP and OPA values were measured before and during VM by Pascal dynamic contour tonometer (DCT) in 55 eyes of 55 healthy male volunteers aged 20 through 27 years. RESULTS: Mean IOP before VM was 17.2 +/- 2.9 mmHg and during the VM was 19.8 +/- 4 mmHg. The increase in mean IOP during the VM was found to be statistically significant (p = 0.001). The IOP increased in 46 (83.6%) of 55 eyes. However, in nine eyes (16.4%), IOP decreased during the VM. Mean OPA value before VM was 3.6 +/- 1.4 mmHg and during the VM was 3.6 +/- 1.3 mmHg. The change in mean OPA value was found to be statistically insignificant (p = 0.9). CONCLUSIONS: The IOP significantly increases during VM, whereas OPA remains stable. Strong autoregulatory mechanisms may provide consistent ocular perfusion in healthy subjects during VM.
BACKGROUND: To evaluate the effect of the Valsalva maneuver (VM) on short-term variations of intraocular pressure (IOP) and ocular pulse amplitude (OPA) values in healthy, young, male subjects. METHODS: IOP and OPA values were measured before and during VM by Pascal dynamic contour tonometer (DCT) in 55 eyes of 55 healthy male volunteers aged 20 through 27 years. RESULTS: Mean IOP before VM was 17.2 +/- 2.9 mmHg and during the VM was 19.8 +/- 4 mmHg. The increase in mean IOP during the VM was found to be statistically significant (p = 0.001). The IOP increased in 46 (83.6%) of 55 eyes. However, in nine eyes (16.4%), IOP decreased during the VM. Mean OPA value before VM was 3.6 +/- 1.4 mmHg and during the VM was 3.6 +/- 1.3 mmHg. The change in mean OPA value was found to be statistically insignificant (p = 0.9). CONCLUSIONS: The IOP significantly increases during VM, whereas OPA remains stable. Strong autoregulatory mechanisms may provide consistent ocular perfusion in healthy subjects during VM.
Authors: Andrea Farioli; David Kriebel; Stefano Mattioli; Katarina Kjellberg; Tomas Hemmingsson Journal: Occup Environ Med Date: 2017-03-09 Impact factor: 4.948
Authors: Jean B Kassem; Steven E Katz; Ashraf M Mahmoud; Robert H Small; Subha V Raman; Cynthia J Roberts Journal: Indian J Ophthalmol Date: 2015-01 Impact factor: 1.848
Authors: Gökhan Pekel; Semra Acer; Ramazan Yagci; Ebru Nevin Cetin; Mehmet Can Hiraali; Hüseyin Kaya Journal: J Ophthalmol Date: 2013-07-30 Impact factor: 1.909