Related Experiment Video
Updated: Aug 25, 2026
Evaluation of the Effectiveness of Longitudinal Incision for Endoscopic Submucosal Excavation of Gastric Subepithelial Lesions
Published on: April 28, 2026
Prospective randomized trial of submucosal hemorrhoidectomy with radiofrequency bistoury vs. conventional Parks'
V Filingeri1, G Gravante, E Baldessari
1Department of Surgery, Tor Vergata University, Rome, Italy. v.filingeri@tiscali.it
Background:
Postoperative pain has always been the main adverse effect of the surgical treatment for hemorrhoids. Surgical techniques evolved mainly to solve this problem as well as postoperative bleeding, stenosis and recurrence. This randomized study compared the results obtained using submucosal hemorrhoidectomy with radiofrequency bistoury with those of the conventional Parks' operation.
Methods:
A total of 102 patients were randomized to undergo submucosal hemorrhoidectomy with radiofrequency bistoury (51 patients) or conventional Parks' haemorrhoidectomy (51 patients); loss of some patients at follow-up resulted in 49 and 45 patients available for analysis, respectively. The operating time, amount of pain (VAS scale, 1-10), postoperative analgesic requirement, intra- and postoperative complications, length of hospital stay and patient satisfaction were documented.
Results:
In comparison to Parks' technique, use of radiofrequency bistoury reduced mean operating time (61.2 min vs. 37.4 min; p<0.05), first postoperative day pain score (5.9 vs. 4.0; p<0.05), pain score at first evacuation (5.7 vs. 4.2; p>0.05), postoperative stay (2.2 days vs. 1.3 days; p<0.05), and pain score on postoperative day 7 (3.6 vs. 2.8; p>0.05). Fecal incontinence was never observed. Incontinence to flatus with spontaneous resolution within 2-3 weeks was reported by 4 subjects in each surgical group. Urinary retention requiring catheterization occurred in 21 subjects in the radiofrequency bistoury group and in 18 patients in the control group. No complications nor recurrences were reported at the 6-month follow-up in either group.
Conclusions:
Performing submucosal hemorrhoidectomy with radiofrequency bistoury improves the results obtained with Parks' technique, allowing us to simplify the surgical procedure, reduce operating time, postoperative pain and bleeding, and shorten the hospital stay.
