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Table 1 Summarized data of patients

From: Protection of L1 nerve roots by pre-relieve tension in parallel endplate osteotomy for severe rigid thoracolumbar spine deformity

Patient No.

Age/Sex

Etiology

Kyphosis Cobb (degrees)

Pre-op Post-op

Scoliosis Cobb (degrees)

Pre-op Post-op

Osteotomy segments

Upper and lower end vertebra

Bleeding (mL)

L1 nerve roots injury

Operative time (hours)

1

33/F

Idiopathic

85 12

67 15

T11/T12

T8-L4

1800

YES

5.6

2

21/M

Idiopathic

90 25

130 40

T12/L1

T5-L5

3000

YES

11

3

25/F

Congenital

112 20

98 18

T12/L1

T8-L5

1500

NO

5.8

4

8/M

Tuberculosis

98 16

T10/T11/T12

T5-L4

1000

YES

6

5

22/M

Idiopathic

102 32

118 35

L1/L2

T8-S1

3000

NO

5.5

6

10/F

Congenital

90 22

78 16

T11/T12

T6-L3

1500

NO

5

7

15/M

Idiopathic

108 24

131 35

T9/T11/T12

T4-L5

2600

NO

9

8

24/F

Congenital

100 15

85 14

T12/L1

T9-L5

1800

NO

6.3

9

16/M

Congenital

148 44

T12/L1

T5-L4

2000

NO

10

10

20/F

Congenital

166 46

T10/T11/T12

T5-L5

1700

NO

7

11

38/F

Idiopathic

85 25

63 15

T12/L1

T9-L4

2500

NO

5.5

12

32/M

Congenital

100 20

54 17

T12

T8-L4

1000

NO

7