Preparing for Colorectal Surgery: What Patients Should Know

Before colorectal surgery, your surgeon will arrange a series of tests to assess your overall health and confirm the surgical plan. These tests help determine whether you are fit for surgery and identify any issues that may need attention beforehand.

Some of the common tests conducted include:

• Complete Blood Count and Metabolic Panels: Blood tests to check blood count, kidney function and clotting ability.
• Electrocardiogram (ECG): An electrocardiogram to assess heart rhythm.
• Chest Radiography: Chest X-ray for lung health.
• Diagnostic Imaging: Imaging, such as CT scans or MRI, to visualise the colon and surrounding structures.

In some cases, additional tests may be required depending on your age, medical history and type of surgery.

A comprehensive review of your medical history before colorectal surgery is also critical, as chronic conditions like diabetes, hypertension, or heart disease can influence your response to anaesthesia and the healing process. Identifying these factors early allows your clinical team to stabilise your health before you enter the operating theatre.

In tandem, your surgeon will evaluate all current medications and supplements. This is vital for blood thinners and anti-inflammatory drugs, which must be adjusted or paused to minimise bleeding risks and ensure a safe surgical environment.

Dietary preparation typically begins a few days before your procedure to reduce stool volume and ensure the bowel is sufficiently cleared for the surgical team.

• Prioritise Low-fibre Options: Focus on easily digestible foods such as white rice, eggs, fish, and lean meats. These choices minimise bowel residue, allowing the preoperative cleansing process to be more effective.
• Restrict High-fibre Intake: Avoid whole grains, nuts, seeds, and raw fruits or vegetables in the days leading up to surgery. Restricting these foods prevents bulk from accumulating in the colon, which is essential for surgical safety.

Fasting is a vital safety requirement that reduces the risk of aspiration while under anaesthesia, ensuring your stomach is empty before the procedure begins.

• Cease Solid Food Intake: Most patients must stop eating solid foods at least 6 to 8 hours before surgery. This timeframe allows the digestive system to clear, providing a safer environment for clinical intervention.
• Manage Clear Fluid Consumption: While clear liquids may be permitted up to a few hours before the operation, you must strictly follow the specific cutoff times provided by your surgical team.

Bowel preparation is a standard safety protocol designed to empty the colon, providing the surgical team with a clear view of the operative site and significantly lowering the risk of postoperative infection.

• Enhance Surgical Visibility: A thoroughly cleared bowel allows for precise identification of anatomical structures, which is essential for a safe and effective clinical outcome.
• Support Procedural Safety: Removing waste material from the colon reduces the bacterial load, protecting the surgical site and ensuring the best possible environment for healing.

Your surgeon will prescribe a specific preparation method tailored to your procedure, typically involving a laxative solution designed to induce frequent bowel movements.

• Laxative Solutions: Most regimens require drinking a prescribed clinical solution that effectively flushes the colon in the hours leading up to the surgery.
• Supplementary Cleansing Tools: In certain cases, your doctor may also recommend enemas or specific oral medications to ensure the bowel is completely prepared for the intervention.

While the preparation process can be physically demanding, taking proactive steps can significantly reduce discomfort and help you manage the cleansing period more effectively.

• Prioritise Accessibility and Comfort: Stay within close proximity to a toilet throughout the preparation period and use soft wipes or barrier creams to prevent skin irritation from frequent bowel movements.
• Maintain Hydration and Rest: Continue drinking clear fluids to avoid dehydration and ensure you rest as needed, as it's normal to experience fatigue while the laxative solution takes effect.