Therapeutic Effect and Mechanism of Negative Pressure Wound Therapy with Huoxue Shengji Decoction Instillation for Chronic Skin Ulcers

Table 4

Comparison of three different treatments.

Group	Number	Time of wound enlarging	Repair operation method (skin/skin flap)	Healing time (d)
A	20	1.30 ± 0.57	17/3	18.40 ± 3.53Δ
B	20	1.65 ± 0.81	15/5	23.20 ± 6.97Δ
C	20	1.75 ± 0.91	16/4	24.25 ± 6.93
F/X^2		1.845	1.625	5.353
		0.167	0.732	0.007
Comparison	value for time of wound enlarging	value for repair operation method	value for healing time
A-B	0.481	0.429	0.031
A-C	0.218	0.677	0.070
B-C	1.000	0.705	0.952

Group A: HXSJ decoction instillation combined with NPWT. Group B: continuous saline instillation combined with NPWT. Group C: NPWT. between groups A and C. between groups A and C. Δ between groups A and B. ΔΔ between groups A and B. ^# between groups B and C. ^## between groups B and C.