Table 2. Incidence of Multiple Occlusions Per Injector, Filler Type, and Instrument Type.
| Filler, instrument, and No. of occlusions | Severity level frequency, No. (%)a | No. of injectorsc | |||
|---|---|---|---|---|---|
| No sequelae | Scar | Eye injury | Mean severity levelb | ||
| Hyaluronic acid | |||||
| Needle, 2 occlusions | 33 (82.5) | 7 (17.5) | 0 | 1.18 | 20 |
| Needle, 3 occlusions | 37 (94.9) | 2 (5.1) | 0 | 1.05 | 13 |
| Needle, 4 occlusions | 10 (83.3) | 2 (16.7) | 0 | 1.17 | 3 |
| Needle, 5 occlusions | 11 (73.3) | 3 (20.0) | 1 (6.7) | 1.33 | 3 |
| Cannula, 2 occlusions | 3 (75.0) | 0 | 1 (25.0) | 1.50 | 2 |
| Cannula, 3 occlusions | 3 (100) | 0 | 0 | 1.00 | 1 |
| Poly-L-lactic acid | |||||
| Needle, 3 occlusions | 2 (66.7) | 0 | 1 (33.3) | 1.67 | 1 |
a
Percentages are divided within rows, so rows total to 100%.
b
Mean severity level is defined as the numerical average when values are assigned as follows: 1, no long-term sequelae; 2, scar; 3, ocular injury or blindness.
c
Injectors with multiple occlusions were classified by the total number of occlusions per injector per filler and instrument type (eg, if an injector had 3 occlusions from hyaluronic acid filler injected with a needle during the past 10 years, they would be listed as 3 occlusions but not also as 2 occlusions).