NCT04515017

Evaluation of Filtering Bleb After Glaucoma Surgery by AS-OCTA

Study on the Value and Mechanism of AS-OCTA in the Evaluation of Filtering Bleb Function and Outcome After Glaucoma Surgery

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 50 (estimated)
• Sponsor: Zhongshan Ophthalmic Center, Sun Yat-sen University · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

When antihypertensive drugs or laser therapy can not reach the target intraocular pressure, trabeculectomy (TRAB) is still the standard surgical method for glaucoma. The scarring of the operative area is a common reason for the failure of trabeculectomy. After trabeculectomy, maintaining the shape and function of the filtering bleb is an important aspect to maintain the surgical effect. The increase in the number of blood vessels on the filtering bleb and the morphological curvature are often the manifestations of decompensation of the filtering bleb. Angiogenesis in the filtering bleb region plays an important role in surgical incision healing and is related to the accompanying scar formation. Therefore, the evaluation of vascular distribution of filtering blebs is an important index and early parameter to evaluate the success or failure of surgery. With the improvement of detection methods, it is possible to use AS-OCTA to evaluate the function and prognosis of filtering bleb after trabeculectomy. Antimitotic drugs such as 5-fluorouracil (5-FU) or mitomycin C (MMC) have always been the most commonly used clinical drugs, but the side effects caused by their use are not satisfactory. It is still the research direction of glaucoma to find new targets for regulating wound healing and more safe and effective drugs.

Detailed description

Glaucoma is a group of optic nerve diseases characterized by progressive and irreversible degeneration of retinal ganglion cells and their axons. Retinal ganglion cells, RGCs is a kind of central nervous system neuron whose cell bodies are located in the retina and axons make up the optic nerve. When antihypertensive drugs or laser therapy can not reach the target intraocular pressure, trabeculectomy (TRAB) is still the standard surgical method for glaucoma. The scarring of the operative area is a common reason for the failure of trabeculectomy. After trabeculectomy, maintaining the shape and function of the filtering bleb is an important aspect to maintain the surgical effect. The increase in the number of blood vessels on the filtering bleb and the morphological curvature are often the manifestations of decompensation of the filtering bleb. Angiogenesis in the filtering bleb region plays an important role in surgical incision healing and is related to the accompanying scar formation. Therefore, the evaluation of vascular distribution of filtering blebs is an important index and early parameter to evaluate the success or failure of surgery. With the improvement of detection methods, it is possible to use AS-OCTA to evaluate the function and prognosis of filtering bleb after trabeculectomy. Antimitotic drugs such as 5-fluorouracil (5-FU) or mitomycin C (MMC) have always been the most commonly used clinical drugs, but the side effects caused by their use are not satisfactory. It is still the research direction of glaucoma to find new targets for regulating wound healing and more safe and effective drugs.

Conditions

• Trabeculectomy

Timeline

• Start date: 2020-09-01
• Primary completion: 2021-08-30
• Completion: 2021-08-30
• First posted: 2020-08-17
• Last updated: 2020-08-17