Table 1 Surgical technique.
Question | n (%) |
|---|---|
1. Do you pre-treat your patients prior to trabeculectomy? | |
No | 25 (53.2) |
Yes | 22 (46.8) |
2. Are your patients predominantly day surgery or overnight stay? | |
Day surgery | 39 (83.0) |
Overnight | 0 |
Combination | 8 (17.0) |
3. What anesthetic do you prefer for trabeculectomy? | |
Topical | 1 (2.1) |
Monitored local | 44 (93.6) |
General | 2 (4.3) |
4. Do you use a traction suture? | |
Yes | 44 (93.6) |
No | 3 (6.4) |
5. Is your conjunctival flap fornix or limbal based? | |
Fornix | 43 (91.5) |
Limbal | 4 (8.5) |
6. What do you use to cut your scleral flap? | |
Diamond knife/crescent blade | 14 (29.8) |
11-blade/crescent blade | 18 (38.3) |
Crescent blade only | 7 (14.9) |
11-blade only | 2 (4.3) |
Other | 6 (12.8) |
7. What is the size of your scleral flap? | |
3 × 3 mm | 2 (4.3) |
3 × 4 mm | 21 (44.7) |
4 × 4 mm | 8 (17.0) |
3 × 4 × 5 mm | 4 (8.5) |
Other | 12 (25.5) |
8. How thick is your scleral flap (thickness of sclera at limbus 800 µm)? | |
1/4 thickness (approx. 200 µm) | 8 (17.0) |
1/3 thickness (approx. 260 µm) | 38 (80.9) |
Other | 1 (2.1) |
9. What shape is your scleral flap? | |
Rectangular | 32 (69.6) |
Square | 4 (8.7) |
Trapezoidal | 9 (19.6) |
Triangular | 0 |
Other | 1 (2.2) |
10. Do you use anti-fibrotics for trabeculectomy? | |
Mitomycin C | 45 (97.8) |
5-Fluorouracil | 0 |
Either | 1 (2.2) |
11. How do you apply the Mitomycin C/5-Fluorouracil? | |
Soaked pledget under Tenon’s | 36 (78.3) |
Injection under Tenon’s | 8 (17.4) |
Onlay over the conjunctiva | 0 |
Subconjunctival injection before opening conjunctiva | 1 (2.2) |
Subconjunctival injection after closing conjunctiva | 0 |
Other | 1 (2.2) |
12. What is your standard Mitomycin C concentration for trabeculectomy with healthy conjunctiva? | |
0.02% | 37 (80.4) |
0.03% | 1 (2.2) |
0.04% | 7 (15.2) |
0.05% | 0 |
Other | 1 (2.2) |
13. What is your standard time for Mitomycin C in a trabeculectomy with healthy conjunctiva? | |
1 min | 0 |
2 min | 11 (23.9) |
3 min | 30 (65.2) |
4 min | 0 |
N/A | 5 (10.9) |
14. Do you place the Mitomycin C under the scleral flap? | |
Yes | 17 (37.0) |
No | 29 (63.0) |
15. How do you suture your scleral flap? | |
Releasable nylon | 19 (41.3) |
Interrupted nylon | 5 (10.9) |
Adjustable nylon | 6 (13.0) |
Combination releasable/interrupted nylon | 15 (32.6) |
Other | 1 (2.2) |
16. When do you suture the scleral flap? | |
Pre-place before the sclerostomy | 29 (63.0) |
After the sclerostomy has been made | 17 (37.0) |
17. How many scleral flap sutures do you use? | |
2 | 13 (28.3) |
3 | 25 (54.4) |
4 | 6 (13.0) |
>4 | 2 (4.4) |
18. How do you suture your scleral flap? | |
Releasable nylon | 19 (41.3) |
Interrupted nylon | 5 (10.9) |
Adjustable nylon | 6 (13.0) |
Combination releasable/interrupted nylon | 15 (32.6) |
Other | 1 (2.2) |
19. When do you suture the scleral flap? | |
Pre-place before the sclerostomy | 29 (63.0) |
After the sclerostomy has been made | 17 (37.0) |
20. How many scleral flap sutures do you use? | |
2 | 13 (28.3) |
3 | 25 (54.4) |
4 | 6 (13.0) |
>4 | 2 (4.4) |
21. What do you use to make the sclerostomy? | |
Kelly punch | 26 (56.5) |
Khaw Descemet punch | 19 (41.3) |
Handcut | 0 |
Other | 1 (2.2) |
22. Do you do a peripheral iridectomy in phakic patients? | |
All cases | 46 (97.9) |
Most cases | 1 (2.1) |
23. Do you do a peripheral iridectomy in pseudophakic patients? | |
All cases | 34 (72.3) |
Most cases | 11 (23.4) |
Some cases | 2 (4.3) |
24. What is the preferred size of your iridectomy? | |
Small (<1 mm) | 14 (29.8) |
Medium (1–2 mm) | 31 (66.0) |
Large (>2 mm) | 0 |
Not important | 2 (4.3) |
25. Do you test for flow after scleral flap closure? | |
Yes | 45 (95.7) |
No | 2 (4.3) |
26. What suture do you use to close the conjunctival flap? | |
Monofilament Vicryl | 2 (4.3) |
Braided Vicryl | 4 (8.5) |
Nylon | 36 (76.6) |
Combination | 5 (10.6) |
27. What suture technique do you use to close the conjunctival flap (multiple choice)? | |
Purse string | 21 (44.7) |
Wing | 20 (42.6) |
Horizontal mattress | 33 (70.2) |
Interrupted | 7 (14.9) |
Continuous | 3 (6.4) |
Other | 4 (8.5) |
28. Do you perform a Seidel test at the end of the case? | |
Yes | 31 (66.0) |
No | 16 (34.0) |
29. Do you use subconjunctival antibiotics? | |
Yes | 37 (78.7) |
No | 10 (21.3) |
30. Do you use subconjunctival steroids? | |
Yes | 45 (95.7) |
No | 2 (4.3) |
31. Do you use topical atropine at the end of the trabeculectomy? | |
Yes | 19 (40.4) |
No | 16 (34.0) |
Sometimes | 12 (25.5) |
