1. Sherleen Chen, M.D. and Roberto Pineda II, M.D.
Comparison of Mini-Flared 45° Kelman and Mini-Flared OZil 12 Tips in Resident and Attending Torsional Phaco Cases
Sherleen Chen, M.D. and Roberto Pineda II, M.D.
Massachusetts Eye and Ear Infirmary
Harvard Medical School
Boston, Massachusetts

2. Purpose Background Goal
Both have 45° bevel at tip
Background
Torsional phaco more effective with angulation of Kelman tip than with straight phaco tip
New OZil 12 developed for surgeons less comfortable with the standard 20° angulation of the Kelman tip
Goal
Compare safety and efficiency of the Mini-flared OZil 12 tip to the Mini-flared 45º Kelman in resident and attending torsional phaco cases
Mini-Flared OZil 12
12° shaft angulation
Mini-Flared 45° Kelman
20° shaft angulation
Straight phaco tip = 0° shaft angulation

3. Methods
48 consecutive cases in 42 patients using torsional phaco performed by residents and attendings
Cases randomly assigned to use of Mini-flared 45° Kelman tip or Mini-flared OZil 12 tip
Data recorded
Complications
Nuclear Density determined pre-operatively
Calculated as LOCS III NC grade + LOCS III NO grade
Ex. NC2NO2C2 = Nuclear Density of 4
Metrics
Cumulative dispersed energy (CDE)
Total ultrasound time (sec)
Aspiration time (sec)

4. Results-Safety No phaco complications encountered
Posterior capsular rent occurred during cortical removal with I/A on one resident case

5. Results-Efficacy
No statistically significant differences

6. Results-Efficacy
No statistically significant differences

7. Results-Efficacy
No statistically significant differences

8. Conclusions
No statistically significant difference between tips in safety or efficacy
Sample size may be too small to achieve statistical signficance
Both tips worked well
For teaching or early learning curve in torsional phaco, we would suggest starting with the OZil 12 for easier visualization of the port, since efficiency of both tips appears to be similar