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| Name | Class |
|---|---|
| The University of Hong Kong | OTHER |
A randomized study to assess the safety and efficacy of single-session pan-retinal photocoagulation (PRP) using Pattern Scan Laser (PASCAL) in proliferative diabetic retinopathy (PDR) - 1,700 shots vs 2,500 shots
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 1,700 | Active Comparator | Patients receive 1,700 (+/- 5%) laser shots in a single session of pan-retinal photocoagulation using pattern scanning laser |
|
| 2,500 | Active Comparator | Patients receive 2,500 (+/- 5%) laser shots in a single session of pan-retinal photocoagulation using pattern scanning laser |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Pan-retinal photocoagulation using pattern scanning laser | Device | Patients receive the designated number of laser shots of pan-retinal photocoagulation with pattern scanning laser in a single session |
| Measure | Description | Time Frame |
|---|---|---|
| Regression of neovascularization | Fluorescein angiogram assessment by independent observer | 3 months |
| Measure | Description | Time Frame |
|---|---|---|
| Activity of neovascularization | Descriptive analysis of fundus fluorescein angiogram by independent observer into 4 categories: no leakage, reduced leakage, same leakage, increased leakage | 3 months |
| Best corrected visual acuity |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Kenneth KW Li, MBChB | United Christian Hospital; The University of Hong Kong | Principal Investigator |
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| ID | Term |
|---|---|
| D003930 | Diabetic Retinopathy |
| ID | Term |
|---|---|
| D012164 | Retinal Diseases |
| D005128 | Eye Diseases |
| D003925 | Diabetic Angiopathies |
| D014652 | Vascular Diseases |
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| 1 week, 1 month, 3 months, 6 months |
| Complications | choroidal detachment, exudative retinal detachment, retinal breaks | 1 week, 1 month, 3 months, 6 months |
| Central foveal thickness | Measured by spectral domain optical coherence tomography (Heidelberg Spectralis) | 1 week |
| Retreatment rate | Patients requiring retreatment with pan-retinal photocoagulation | 6 months |
| D002318 |
| Cardiovascular Diseases |
| D048909 | Diabetes Complications |
| D003920 | Diabetes Mellitus |
| D004700 | Endocrine System Diseases |