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The IOP is higher during sleep. Efficacy of timolol in lowering IOP during the sleep period may be limited. [16] [17] [18] It is a 5–10× more potent beta blocker than propranolol. Timolol is light-sensitive; it is usually preserved with 0.01% benzalkonium chloride (BAC), but also comes BAC-free.
Brimonidine is indicated for the lowering of intraocular pressure in people with open-angle glaucoma or ocular hypertension. [1] It is also used to reduce redness of the eye. [3] The gel is indicated for the topical treatment of persistent (nontransient) facial erythema of rosacea in adults 18 years of age or older. [2]
It is reduced to dihydrolevobunolol, which is equally active, in the eye's tissues. The drug starts to lower intraocular pressure within an hour, reaches its maximum effect after two to six hours, and remains effective for up to 16 hours. It has an elimination half-life of six hours and is mainly excreted via the kidney. [2] [3]
Betaxolol is most commonly ingested orally alone or with other medications for the management of essential hypertension. [4] It is a cardioselective beta blocker, targeting beta-1 adrenergic receptors found in the cardiac muscle.
It is defined as the pressure exerted by a column of water of 1 inch in height at defined conditions. At a temperature of 4 °C (39.2 °F) pure water has its highest density (1000 kg/m 3). At that temperature and assuming the standard acceleration of gravity, 1 inAq is approximately 249.082 pascals (0.0361263 psi). [2]
The CGS unit is the poise (P, or g·cm −1 ·s −1 = 0.1 Pa·s), [28] named after Jean Léonard Marie Poiseuille. It is commonly expressed, particularly in ASTM standards, as centipoise (cP). The centipoise is convenient because the viscosity of water at 20 °C is about 1 cP, and one centipoise is equal to the SI millipascal second (mPa·s).
p g is the unsaturated pore water pressure (Pa) at ground level, g w is the unit weight of water (kN/m 3), = / d w is the depth of the water table (m), and the pore pressure at depth, z, below the surface is: = (), where: p u is the unsaturated pore water pressure (Pa) at point, z, below ground level, z is depth below ground level.
Saline solution for irrigation. Normal saline (NSS, NS or N/S) is the commonly used phrase for a solution of 0.90% w/v of NaCl, 308 mOsm/L or 9.0 g per liter. Less commonly, this solution is referred to as physiological saline or isotonic saline (because it is approximately isotonic to blood serum, which makes it a physiologically normal solution).