Two-Dimensional Cutting (TDC) Vitrectome: In Vitro Flow Assessment and Prospective Clinical Study Evaluating Core Vitrectomy Efficiency versus Standard Vitrectome
Table 1
Comparison of aspiration flow rates (mL/min) using TDC and standard single-cut vitrectomes connected to the EVA surgical system at varying cut rates and different vacuum pressures, in vitro tests performed using artificial vitreous humor as the aspirating fluid.
Cut rate (cpm)
0
2,000
4,000
5,000
6,000
7,000
8,000
25G TDC vitrectome flow rate (mL/min)
350 mmHg
1.8
1.8
1.8
1.9
1.9
2.0
1.9
550 mmHg
3.2
3.3
3.2
3.3
3.3
3.3
3.3
Max mmHg
4.3
4.3
4.2
4.3
4.2
4.2
4.2
25G standard vitrectome flow rate (mL/min)
350 mmHg
1.8
1.3
1.3
1.1
1.0
0.9
0.7
550 mmHg
3.1
2.2
2.2
1.8
1.6
1.6
1.1
Max mmHg
3.9
2.8
2.7
2.3
2.0
1.9
1.3
27G TDC vitrectome flow rate (mL/min)
350 mmHg
0.9
0.8
0.9
0.9
0.9
0.9
0.9
550 mmHg
1.6
1.6
1.6
1.6
1.6
1.6
1.6
Max mmHg
1.9
2.0
2.0
2.1
2.1
2.1
2.0
27G standard vitrectome flow rate (mL/min)
350 mmHg
0.8
0.6
0.7
0.6
0.5
0.5
0.4
550 mmHg
1.5
1.1
1.1
0.9
0.8
0.8
0.6
Max mmHg
1.9
1.4
1.4
1.2
1.0
1.0
0.7
TDC: two-dimensional cutting; cpm: cuts per minute; mmHg: millimeters of mercury.
