Mechanical bowel preparation before elective colorectal surgery: is it necessary?

Area of Science:

• Colorectal Surgery
• Surgical Preparation
• Clinical Guidelines

Background:

• Mechanical bowel preparation (MBP) has been a long-standing practice for patients undergoing elective colorectal surgery (ECS).
• The necessity and impact of MBP on patient outcomes remain a subject of ongoing research and clinical debate.

Purpose of the Study:

• To review and present current global guidelines on the use of MBP in elective colorectal surgery.
• To evaluate the evidence supporting or refuting the routine use of MBP before ECS.

Main Methods:

• A retrospective review of PubMed-identified randomized controlled trials (RCTs) and meta-analyses.
• Comparison of outcomes between adult patients who received preoperative MBP and those who did not.
• Key outcome measures included postoperative septic complications and anastomotic dehiscence.

Main Results:

• The review identified 5 RCTs and 2 meta-analyses meeting the inclusion criteria.
• Emergency colorectal surgery cases were excluded from the analysis.
• Specific recommendations for 6 distinct types of elective colorectal surgery were identified.

Conclusions:

• Recent research indicates that omitting MBP in elective colorectal surgery does not significantly increase postoperative infectious complications like anastomotic dehiscence or superficial surgical site infections.
• MBP is associated with patient discomfort, increased costs, and time, and carries risks of serious complications such as electrolyte and volume disturbances, particularly in patients with pre-existing conditions.
• The evidence suggests a potential shift away from routine MBP in elective colorectal surgery, necessitating a re-evaluation of current clinical guidelines.