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Table 2 Comparison of intraoperative parameters and corneal damage in the soft and hard nucleus subgroups

From: Comparisons of the energy efficiency and intraocular safety of two torsional phacoemulsification tips

 

Total

n = 104

Soft lens (grade II nucleus)

n = 39

Hard lens (grade III + IV nucleus)

n = 65

 

Balanced(n = 47)

Kelman(n = 57)

P value

Balanced(n = 15)

Kelman(n = 24)

P value

Balanced(n = 32)

Kelman(n = 33)

P value

Total case time

561.1 ± 276.5

525.1 ± 389.9

0.596

529.8 ± 282.0

491.2 ± 475.4

0.777

576.1 ± 277.2

549.8 ± 319.4

0.724

total Estimated fluid Aspirated

44.0 ± 20.9

48.5 ± 32.7

0.418

33.9 ± 8.4

31.5 ± 8.5

0.394

48.8 ± 23.3

60.8 ± 37.9

0.127

CDE

6.10 ± 7.32

9.57 ± 12.49

0.081

1.73 ± 1.84

2.35 ± 2.64

0.432

8.15 ± 8.02

14.82 ± 14.16

0.023

ATA (%)

27.59 ± 12.26

53.75 ± 13.00

 < 0.001

17.79 ± 8.60

45.70 ± 14.11

 < 0.001

32.18 ± 11.03

59.59 ± 8.30

 < 0.001

ATA-FP3

27.20 ± 12.18

52.80 ± 12.69

 < 0.001

17.72 ± 8.54

45.40 ± 14.05

 < 0.001

32.03 ± 10.94

58.19 ± 8.31

 < 0.001

EATA-FP3

10.88 ± 4.87

21.12 ± 5.07

 < 0.001

7.09 ± 3.41

18.16 ± 5.62

 < 0.001

12.81 ± 4.38

23.27 ± 3.32

 < 0.001

ALP (%)

7.61 ± 11.87

38.13 ± 12.54

 < 0.001

3.95 ± 7.34

32.27 ± 13.78

 < 0.001

9.32 ± 13.23

42.39 ± 9.71

 < 0.001

ALP-FP3

0.08 ± 0.11

0.56 ± 0.50

 < 0.001

0.04 ± 0.06

0.24 ± 0.17

 < 0.001

0.09 ± 0.13

0.79 ± 0.53

 < 0.001

EAUP-FP3

1096 ± 4.92

21.68 ± 5.25

 < 0.001

7.13 ± 3.44

18.40 ± 5.66

 < 0.001

12.90 ± 4.43

24.06 ± 3.35

 < 0.001

CTE

6.04 ± 7.19

9.16 ± 11.58

0.096

1.73 ± 1.82

2.32 ± 2.56

0.442

8.06 ± 7.87

14.14 ± 13.02

0.027

CLE

0.06 ± 0.14

0.41 ± 1.08

0.018

0.01 ± 0.02

0.04 ± 0.10

0.255

0.09 ± 0.17

0.69 ± 1.37

0.017

Change of P1D CCT (μm)

28.96 ± 22.06

35.83 ± 37.84

0.252

20.40 ± 17.25

19.96 ± 14.00

0.931

32.97 ± 23.14

47.36 ± 45.16

0.111

Change of P1W CCT (μm)

6.69 ± 18.57

8.73 ± 16.21

0.559

-0.31 ± 11.59

3.74 ± 18.27

0.477

9.53 ± 20.21

12.31 ± 13.76

0.522

Loss rate of ECD (%)

0.13 ± 0.11

0.11 ± 0.15

0.360

0.07 ± 0.14

0.05 ± 0.12

0.118

0.13 ± 0.13

0.15 ± 0.16

0.715

  1. CDE cumulative dissipated energy, ATA average torsional amplitude, ATA-FP3 ATA when the foot pad was on gear 3, EATA-FP3 total torsional amplitude on time, equivalent average torsional amplitude-FP3, ALP average longitudinal power, ALP-FP3 average longitudinal power-FP3, EAUP-FP3 total longitudinal power on time and equivalent average ultrasonic power-FP3, CTE cumulative torsional energy, CLE cumulative longitudinal energy, CCT corneal central thickness, ECD endothelial cell density, P1D one day after surgery, P1W one week after surgery