Group

Control group (n = 73)

Experimental group (n = 73)

t

P value

Indwelling time (d)

3.24 ± 0.92

11.05 ± 2.48

25.23

P < 0.0001

Total number of puncturing times

4.21 ± 1.09

1.04 ± 2.72

9.24

P < 0.0001