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Table 4 Operative data of 2 groups

From: Comparison of electromagnetic and optical navigation assisted Endo-TLIF in the treatment of lumbar spondylolisthesis

 

Electromagnetic navigation group

Optical navigation group

P

Number of screws

168

184

Duration of guide wires insertion (min)

15.41 ± 2.68

20.20 ± 3.41

0.000

Duration of decompression and cage placement (min)

73.43 ± 7.04

85.83 ± 7.74

0.000

Frequency of adjustment for guide wires (times)

3

7

0.414

Rate of adjustment (%)

1.78

3.80

operative time (min)

170.38 ± 14.79

180.74 ± 14.84

0.002

Operative blood loss (ml)

20.45 ± 5.52

20.04 ± 5.59

0.731

Frequency of X-ray exposure (times)

8.95 ± 1.67

8.54 ± 1.53

0.234

Hospitalization after operation (days)

3.50 ± 0.94

3.24 ± 0.64

0.137

  1. Rate of adjustment = (Frequency/Number of screws).