Modified Perineal Reconstruction Combined with Anal Sphincter Repair for Obstetric Anal Sphincter Injuries

Figures & data

Figure 1 Surgical steps of modified perineal reconstruction combined with anal sphincter repair. (A) Horizontal incision of rectovaginal septum; (B) looking for the broken external anal sphincter; (C) repair of external anal sphincter; (D) making V-Y advancement flap; (E) postoperative appearance.

Table 1 Comparison of Williams Score Before and After Operation

Williams Score	Before Operation	One Month After Operation*	Six Months After Operation*^#	χ^2	P
A	0 (0.0%)	4 (20.0%)	17 (85.0%)	72.838	<0.001
B	0 (0.0%)	12 (60.0%)	3 (15.0%)
C	5 (25.0%)	4 (20.0%)	0 (0.0%)
D	10 (50.0%)	0 (0.0%)	0 (0.0%)
E	5 (25.0%)	0 (0.0%)	0 (0.0%)

Notes: *Compared with before operation, the difference was statistically significant, P < 0.05. ^#Compared with one month after operation, the difference was statistically significant, P < 0.05.

Table 2 Comparison of Wexner Score

	Before Operation	One Month After Operation*	Six Months After Operation*^#	F	P
Wexner score	9.00±4.17	1.35±0.99	0.20±0.41	74.155	<0.001

Notes: *Compared with before operation, the difference was statistically significant, P < 0.05. ^#Compared with one month after operation, the difference was statistically significant, P < 0.05.

Table 3 Comparison of Anorectal Pressure Measurement Parameters

	Before Operation	Six Months After Operation	t	p
Maximum resting pressure (mmHg)	34.05±5.75	59.90±5.10	−24.342	<0.001
Maximum systolic blood pressure (mmHg)	59.90±10.88	122.35±10.70	−50.249	<0.001
Anal defecation pressure (mmHg)	30.75±6.93	51.30±4.61	−18.991	<0.001
Rectoanal inhibitory reflex index (mL)	8.40±1.39	8.55±1.28	−1.143	0.267