Fluorophotometric and tonometric evaluation of ocular effects following aqueocentesis performed with needles of various sizes in dogs

Abstract

Aqueocentesis performed with a 25-gauge needle resulted in the greatest degree of blood-aqueous barrier breakdown and a brief state of intraocular hypertension. Use of a 27- or 30-gauge needle is recommended for aqueous paracentesis. A consensual ocular reaction appeared to occur in dogs following unilateral traumatic blood-aqueous barrier breakdown and may be of clinical importance.

Quantification and comparison of baseline cortisol levels between aqueous and plasma from healthy anesthetized hound dogs utilizing mass spectrometry

“…Other causes of blood–aqueous disruption include anterior uveitis, ocular surgery, trauma, aqueous centesis, and ocular irritants . It is well understood that aqueous centesis inevitably causes uveitis and breakdown of the BAB . One concern with our study is whether the incidence of cortisol in the canine Aq is related to a disruption of the BAB rather than a normal, physiological component of the eye.…”

Validity of aqueocentesis as a component of anterior uveitis investigation in dogs and cats

“…A limbal/peri‐limbal entry position distant from the 3 or 9 o'clock position is preferred, reducing proximity to the long posterior ciliary arteries. Aqueocentesis is also recognized to induce breakdown of the blood aqueous barrier; therefore, we routinely administered atropine postprocedure to reduce this breakdown,unless the patient had glaucoma. Patients were also given topical corticosteroids after the procedure, unless corneal ulceration was present, in which case topical nonsteroidal anti‐inflammatory drugs were used.…”

Comparative evaluation of aqueous humor viscosity

“…From the authors' clinical impression, the handling characteristics of the barred owl aqueous humor differ from domestic species (e.g., dog, cat), and ocular anterior chamber paracentesis in the barred owl is facilitated by the use of a much larger gauge needle (22 gauge) than currently recommended for use in dogs to accommodate for passage of the viscous aqueous humor . This may have important clinical implications for diagnostic and therapeutic ocular anterior chamber paracentesis in some avian species.…”