Measurement of the Actual Dose of Triamcinolone Acetonide Delivered by Common Techniques of Intravitreal Injection

Efforts to achieve a 4.0-mg dose of TA, regardless of method used, are variable and inconsistent. Injecting through a small-gauge needle appears to concentrate the remaining suspension. Techniques to concentrate TA or remove aqueous preservatives by filtering effectively increase the concentration, but these results are variable.