Transvitreal chorioretinal biopsy in the rabbit

Area of Science:

• Ophthalmology
• Surgical Innovation
• Animal Models

Background:

• Accurate diagnosis of posterior eye diseases often requires tissue sampling.
• Existing biopsy methods may have limitations in accessibility and invasiveness.

Purpose of the Study:

• To develop and evaluate a transvitreal chorioretinal biopsy technique in an animal model.
• To assess the feasibility and safety of obtaining posterior eye wall specimens.

Main Methods:

• A 1.6-mm diameter posterior eye wall specimen was obtained via a transvitreal approach in Dutch rabbits.
• The procedure utilized a micromanipulator for stereotaxic control and mechanical pressure for hemostasis.
• The eye wall defect was sealed with an explant and repaired by fibrovascular ingrowth.

Main Results:

• Histologic features of biopsy specimens were preserved, with minor separation of retinal layers observed.
• Complications included minor hemorrhage, transvitreal strands, and lens abrasion, none causing significant optical media opacification.
• The technique demonstrated successful tissue retrieval and wound sealing.

Conclusions:

• Transvitreal chorioretinal biopsy is a feasible technique in rabbits for obtaining diagnostic specimens.
• This method holds potential for diagnosing choroidal tumors and other retinal disorders.
• The technique can also serve as a valuable tool for investigational animal studies in ophthalmology.