Application of Suctioning Ureteral Access Sheath during Flexible Ureteroscopy for Renal Stones Decreases the Risk of Postoperative Systemic Inflammatory Response Syndrome
Table 1
Preoperative characteristics stratified by surgery type before and after propensity score matching.
Variables
Before propensity score matching
After propensity score matching
Nonsuctioning UAS group (363)
Suctioning UAS group (81)
value
Nonsuctioning UAS group (81)
Suctioning UAS group (81)
value
Sex, n (%)
0.806
0.617
Female
138 (38.0%)
29 (35.8%)
25 (30.9%)
29 (35.8%)
Men
225 (62.0%)
52 (64.2%)
56 (69.1%)
52 (64.2%)
Age (years)
0.740
0.883
Median (Q1, Q3)
49.0 (40.0, 58.0)
51 (42.0, 57.0)
50.0 (43.0, 57.0)
51.0 (42.0, 57.0)
BMI (kg/m2)
0.512
0.735
Median (Q1, Q3)
23.7 (21.6, 25.7)
23.7 (22.1, 26.1)
24.2 (21.8, 26.3)
23.7 (22.1, 26.1)
Diabetes mellitus, n (%)
0.243
1.000
Yes
35 (9.64%)
12 (14.8%)
12 (14.8%)
12 (14.8%)
No
328 (90.4%)
69 (85.2%)
69 (85.2%)
69 (85.2%)
Hypertension, n (%)
0.952
1.000
Yes
59 (16.3%)
14 (17.3%)
13 (16.0%)
14 (17.3%)
No
304 (83.7%)
67 (82.7%)
68 (84.0%)
67 (82.7%)
Albumin
0.220
0.827
Mean (SD)
40.7 (3.86)
41.2 (3.73)
41.1 (3.38)
41.2 (3.73)
Globulin
0.934
0.785
Mean (SD)
-
-
28.1 (4.98)
27.9 (4.01)
Median (Q1, Q3)
27.3 (24.9, 29.8)
27.8 (24.5, 31.2)
-
-
AGR
0.410
0.796
Mean (SD)
1.48 (0.34)
1.51 (0.29)
1.50 (0.29)
1.51 (0.29)
WBC
0.340
0.758
Median (Q1, Q3)
5.85 (4.89, 7.13)
5.86 (4.67, 6.84)
5.67 (4.77, 6.72)
5.86 (4.67, 6.84)
Urine WBC, n (%)
<0.001
1.000
−
123 (33.9%)
62 (76.5%)
62 (76.5%)
62 (76.5%)
+
240 (66.1%)
19 (23.5%)
19 (23.5%)
19 (23.5%)
Urine culture, n (%)
0.197
1.000
−
320 (88.2%)
76 (93.8%)
76 (93.8%)
76 (93.8%)
+
43 (11.8%)
5 (6.17%)
5 (6.17%)
5 (6.17%)
Urine nitrate, n (%)
0.548
1.000
−
347 (95.6%)
79 (97.5%)
79 (97.5%)
79 (97.5%)
+
16 (4.41%)
2 (2.47%)
2 (2.47%)
2 (2.47%)
Preoperative fever, n (%)
<0.001
1.000
Yes
98 (27.0%)
3 (3.70%)
3 (3.70%)
3 (3.70%)
No
265 (73.0%)
78 (96.3%)
78 (96.3%)
78 (96.3%)
Hydronephrosis
0.391
0.278
Yes
332 (91.5%)
71 (87.7%)
5 (6.17%)
10 (12.3%)
No
31 (8.54%)
10 (12.3%)
76 (93.8%)
71 (87.7%)
Preoperative indwelling stent, n (%)
0.005
0.682
Absent
245 (67.5%)
68 (84.0%)
65 (80.2%)
68 (84.0%)
Present
118 (32.5%)
13 (16.0%)
16 (19.8%)
13 (16.0%)
Number of stones, n (%)
0.057
1
202 (55.6%)
35 (43.2%)
43 (53.1%)
35 (43.2%)
≥2
161 (44.4%)
46 (56.8%)
38 (46.9%)
46 (56.8%)
Stone size (mm)
0.108
0.714
Median (Q1, Q3)
19.0 (16.0, 22.0)
19.0 (17.0, 23)
20.0 (17.0, 23.0)
19.0 (17.0, 23.0)
Location
1.000
Upper/middle pole
211 (58.1%)
47 (58.0%)
56 (69.1%)
47 (58.0%)
Lower pole
152 (41.9%)
34 (42.0%)
25 (30.9%)
34 (42.0%)
Laterality of stones, n (%)
0.001
1.000
Left
175 (48.2%)
22 (27.2%)
22 (27.2%)
22 (27.2%)
Right
188 (51.8%)
59 (72.8%)
59 (72.8%)
59 (72.8%)
BMI, body mass index; AGR, albuminglobulin ratio; WBC, white blood cell; fURS, flexible; UAS, ureteral access sheath.
