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Table 2 Intraoperative and postoperative data

From: Comparison of retrograde anatomy iliac bone flap grafting versus anterograde anatomy iliac bone flap grafting for treatment of osteonecrosis of the femoral head

Variable

Retrograde group

Antegrade group

P value

(N = 49)

(N = 52)

Iliac bone flap volume (cm3)

15.6 ± 5.9

15.5 ± 5.6

0.905

Total—operation time (min)

173.3 ± 16.5

202.1 ± 16.8

< 0.001

Iliac bone flap resection time (min)

44.1 ± 4.4

57.1 ± 7.6

< 0.001

Vascular anastomosis time (min)

27.8 ± 2.2

27.8 ± 2.3

0.948

Total—operative blood loss (ml)

327.5 ± 60.4

368.3 ± 44.3

< 0.001

Donor blood loss (ml)

115.3 ± 29.2

149.0 ± 28.8

< 0.001

Recipient blood loss (ml)

212.2 ± 38.9

219.2 ± 24.6

0.287

Donor complication

1 (2.0%)

11 (21.2%)

0.004

 Infection

0

3

 

 Hematoma

1

8

 

Recipient complication

1 (2.0%)

2 (3.8%)

1

 Infection

0

0

 

 Hematoma

1

2

 

Donor-recipient delayed healing

0 (0.0%)

6 (11.5%)

0.027

Failure of iliac bone flap resectiona

2 (4.1%)

12 (23.1%)

0.008

Location of iliac bone flap incision

  

0.008

 Contralateral

47

40

 

 Ipsilateral

2

12

 

LFCNI

2 (4.1%)

11 (21.2%)

0.015

Recover within 3 months

2

6

 

Recipient ectopic ossification

3 (6.1%)

15 (28.8%)

0.004

Location of iliac bone flap incision

  

0.442

 Contralateral

1

2

 

 Ipsilateral

2

13

 
  1. LFCNI lateral femoral cutaneous nerve injury
  2. aThe patients who failed resection were replaced by ipsilateral iliac bone flap resection