Table 1 Patient demographics

Number of patients

32

Age, years, median (range)

46.8 (35–66)

Gender, male/female, n

7/25

BMI, kg/m²

22.9 ± 1.35

Etiology of stricture, n

 Surgery/radiation therapy for cervical cancer

17

 Surgery/radiation therapy for rectal cancer

10

 Surgery for ovarian cancer

5

Stricture side, n

 Unilateral

28

 Bilateral

4

Stricture site, n

 Upper ureter

7

 Middle ureter

4

 Lower ureter

25

Length of US, cm, median (range)

10.8 (3–17)

Urinary infection before placement, n

5/32

Previous treatment, n

 Nephrostomy ≥ 1

2/32

 PS ≥ 2

8/32

 Endoincision ≥ 1

0/32

 Balloon dilation ≥ 1

5/32