Ureteroscopic holmium laser to transect the greater omentum to remove an abdominal drain: Four case reports

Table 2 Perioperative data for the patients undergoing surgery using a ureteroscope and a holmium laser

Variable	Patient 1	Patient 2	Patient 3	Patient 4	Mean value
Intraoperative irrigation volume (mL)	716	952	1285	615	892.0
Intraoperative drainage volume (mL)	500	756	845	453	638.5
Operation time (min)	25	30	23	20	24.5
Intraoperative hemorrhage (mL)	No	No	No	No	—
Surrounding tissues damage	No	No	No	No	—
Successfully removed drain	Yes	Yes	Yes	Yes	—
Postoperative exhaust time (h)	6.5	3.4	10.6	2.2	5.7
Off-bed activity time (h)	6.8	2	10	4.6	5.9
Postoperative drainage volume (mL)	16	10	73	32	32.8
Postoperative VAS (score)	3	1	1	2	1.8
Postoperative fever	No	No	No	No	—
Postoperative bleeding	No	No	No	No	—
Follow-up time (mo)	6	18	14	12	12.5

VAS: Visual analogue pain scores.