Laparoscopic or transanal approach: which is better for the management of obstructed defecation?

Background
Obstructed-defecation syndrome (ODS) is a condition characterized by the inability to completely evacuate or expel a fecal bolus in the presence of the urge to defecate. A series of mechanical lesions may cause OD, including rectocele, rectoanal intussusception, and rectal prolapse, which may be a cause or an end result of obstruction and chronic straining. The problem with OD, is mainly the difficulty in diagnosis and selection of cases, which could benefit from surgery. Moreover, it is very difficult to determine the suitable surgical technique for each individual case, that is, tailoring of cases.
Aim
Many surgical techniques have been established either through transanal or laparoscopic approach. Each of these techniques has its benefits and its hazards. Most of the studies in the literature focus on advocating or criticizing a specific surgical technique. This study, however, aims at comparing the results of different surgical techniques through laparoscopic (posterior rectopexy, ventral mesh rectopexy) or transanal (Altemeier’s, Delorme’s, stapled transanal rectal resection) approach in order to answer a simple question: which approach should be the default and when to use the other?
Patients and methods
A sample of 28 cases of OD was studied, 14 of which were done through laparoscopic and 14 through transanal approach. Comparison was based on the postoperative hospital stay, complications, and the change in OD score using the ‘Altomare ODS questionnaire, 2008.
Results
Bleeding was more in laparoscopic techniques, occurring in two (14.3%) of the patients, versus one patient (7.1%) only of those done transanally. Incontinence was more among the transanal group as it occurred in three (21.4%) patients, versus one (7.1%) patient only done laparoscopically. Only one (7.1%) patient done transanally (Delorme’s technique), had postoperative anal stenosis requiring anal-dilation sessions. Besides, one (7.1%) of the female patients done through transanal approach, developed rectovaginal fistula. Two of the male patients done by laparoscopic posterior rectopexy developed erectile dysfunction. Laparoscopic techniques had more drop in the ODS score than transanal techniques with a mean of 9.5 ± 6 versus 4.64 ± 5.31, respectively, and a value of statistical significance (=0.042).
Conclusions
Laparoscopic approach is superior to transanal approach as regards improvement of OD manifestations, and thus should be the default, yet the techniques that involve dissection along the posterior rectal wall (posterior mesh rectopexy) are not recommended for males, especially adults.