1. Introduction:

   The most common complication of loop ileostomies closure for rectal cancer patients undergoing a low anterior rectum resection, is the superficial surgical site infection (incidence 2-40%). There are various techniques related to closing loop ileostomy. In a retrospective study at our center, the investigators objectify that superficial surgical site infection rate was reduced by more than a half by the application of a contralateral drainage (Penrose ®) in primary loop ileostomy closure.

2. Objectives and Hypothesis:

   Hypothesis: The application of a contralateral drainage (Penrose ®) in primary loop ileostomy closure (in carriers of loop ileostomy by a low anterior rectum resection for rectal cancer) reduces the superficial surgical site infection.

   Main objective: To reduce the rate of superficial surgical site infection by the application of a contralateral drainage (Penrose ®) in surgical wound of primary loop ileostomy closure.

3. Methodology:

Prospective and randomized clinical trial on the effectiveness of contralateral Penrose® drainage implementation in those patients that have a primary loop ileostomy (by low anterior rectum resection) closure to be able to know if the investigators can reduce the superficial surgical site infection rate. Monitorization until 30 days after surgery

1. Introduction:

   The most common complication of loop ileostomies closure for rectal cancer patients undergoing a low anterior rectum resection, is the superficial surgical site infection (incidence 2-40%). In the literature there are various techniques related to closing loop ileostomy that try to reduce the rate of infections recorded. In a retrospective study at our center, the investigators objectify that superficial surgical site infection rate was reduced by more than a half by the application of a contralateral drainage (Penrose ®) in primary loop ileostomy closure.

2. Objectives and Hypothesis:

   Hypothesis: The application of a contralateral drainage (Penrose ®) in primary loop ileostomy closure (in carriers of loop ileostomy by a low anterior rectum resection for rectal cancer) reduces the superficial surgical site infection.

   Main objective: To reduce the rate of superficial surgical site infection by the application of a contralateral drainage (Penrose ®) in surgical wound of primary loop ileostomy closure.

   Secondary objectives:

   • Identify risk factors associated with superficial surgical site infection in relation to a primary loop ileostomy closure (with or without drainage).
   • Reducing hospital stay and care at home.

3. Methodology:

Prospective and randomized clinical trial on the effectiveness of contralateral Penrose® drainage implementation in those patients that have a primary loop ileostomy (by low anterior rectum resection) closure to be able to know if the investigators can reduce the superficial surgical site infection rate.

It will be used a simple randomization. To assess the occurrence of superficial incisional infection, the investigators will be monitoring patients till 30 days after surgery

Inclusion Criteria:

• Any patient carrying loop ileostomy due to low anterior resection for rectal cancer.
• Over 18 years.
• Surgery scheduled.
• Informed consent signed.

Exclusion Criteria:

Patients with terminal ileostomy.

• Patients with loop ileostomy different from any surgery of rectal cancer.
• To require another surgical procedure added.
• Urgent surgery.
• Patient refusal to participate in the study.