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What to Expect Before, During and After Colorectal Surgery

What to Expect Before, During and After Colorectal Surgery
Dr Dennis Koh
Dr Dennis Koh
Medical Director & Senior Consultant Colorectal Surgeon
MBBS (Nottingham), B Med Sci (Nottingham), MMed (Surgery), FRCS (Edinburgh), FAMS
Dr Sharon Koh
Dr Sharon Koh
Senior Consultant Colorectal Surgeon
MBBS (Singapore), MMed (Surgery), FRCS (Edinburgh), FAMS
Dr Pauleon Tan
Dr Pauleon Tan
Senior Consultant Colorectal Surgeon
MBBS (Singapore), MMed (Surgery), FRCS (Edinburgh), FAMS
A specialist explaining colorectal surgery to a patient

Colorectal surgery can feel unfamiliar and overwhelming, especially for patients who are preparing for surgery for the first time. Questions about preparation, recovery, hospital stay and follow-up care are common, particularly when patients are unsure what the overall surgical journey may involve.

From pre-operative assessment to post-surgical recovery, colorectal surgery often involves several stages designed to support both treatment and healing. Understanding what to expect before, during and after surgery may help patients feel more informed and better prepared when discussing treatment plans with their colorectal surgeon.

Key Takeaways

  • Colorectal surgery may be recommended for conditions affecting the colon, rectum or anus when symptoms become more severe or complex.
  • Preparation before surgery may include consultations, diagnostic tests, bowel preparation and medication review.
  • Colorectal surgery may be performed using open, laparoscopic or robotic-assisted techniques depending on the condition treated.
  • Recovery after surgery varies between patients and may involve hospital monitoring, wound care and follow-up appointments.
  • Minimally invasive colorectal surgery may support shorter hospital stay and recovery for selected patients.

When Is Colorectal Surgery Recommended?

Colorectal surgery may be recommended for conditions affecting the colon, rectum or anus when symptoms become more severe, complications develop or non-surgical treatment is no longer sufficient. Depending on the condition, surgery may be performed to relieve symptoms, remove diseased tissue or manage more complex colorectal diseases.

Some of the conditions that may require colorectal surgery include:

The type of surgery recommended depends on several factors, including the condition being treated, symptom severity, overall health and whether minimally invasive techniques may be appropriate. Today, some patients may be suitable for minimally invasive colorectal surgery, which uses laparoscopic or robotic-assisted techniques to reduce tissue trauma and support recovery.

What Happens Before Colorectal Surgery?

Before colorectal surgery, patients usually undergo several stages of assessment and preparation to help ensure the procedure is planned safely and appropriately. The exact preparation process may vary depending on the condition being treated, the type of surgery planned and the patient's overall health.

Before surgery, patients may expect:

  • Consultation and physical examination with a colorectal surgeon
  • Review of symptoms, medical history and current medications
  • Diagnostic tests such as blood tests or imaging scans
  • Discussion of surgical options, benefits and potential risks
  • Instructions regarding fasting and medication adjustments before surgery
  • Bowel preparation if required for the procedure

Some patients may also require additional investigations or pre-operative planning depending on the complexity of the condition and the type of surgery being considered.

During the pre-operative consultation, the surgeon will usually explain what the procedure involves, the expected recovery process and possible post-operative care requirements. Patients may also receive guidance on preparing for discharge and recovery at home after surgery.

What Happens During Colorectal Surgery?

On the day of colorectal surgery, patients are usually admitted to the hospital for final preparation before the procedure. This may include medical checks, meeting the anaesthesia team and confirming the surgical plan with the colorectal surgeon.

Colorectal surgery is typically performed under general anaesthesia, so patients remain asleep throughout the operation. The type of procedure performed depends on the condition being treated, the extent of disease involvement and the planned surgical approach.

Common surgical techniques include:

  • Open surgery using a larger incision
  • Laparoscopic surgery performed through small incisions using specialised instruments
  • Robotic-assisted surgery, which may provide greater precision in selected procedures

Some patients may be suitable for minimally invasive techniques, which may help reduce tissue trauma, shorten hospital stay and support recovery after surgery.

Throughout the procedure, the surgical team closely monitors the patient's condition, including heart rate, blood pressure and breathing. Surgery duration can vary depending on the complexity and type of colorectal procedure being performed.

What to Expect During Recovery After Colorectal Surgery

Recovery after colorectal surgery usually begins in the hospital, where patients are monitored closely following surgery and anaesthesia. Recovery time varies depending on the type of surgery performed, the condition treated and the patient's overall health.

During the early stages of recovery, patients may receive pain management, begin eating and drinking gradually and be encouraged to walk early to support circulation and bowel function. The surgical team will also monitor wound healing and bowel movements before discharge.

Some patients may undergo minimally invasive procedures using laparoscopic or robotic-assisted techniques. These approaches may result in smaller wounds, shorter hospital stay and faster recovery for selected patients.

After discharge, patients are usually advised to:

  • Care for surgical wounds as instructed
  • Avoid heavy lifting temporarily
  • Maintain hydration and appropriate bowel habits
  • Take prescribed medication as directed
  • Attend follow-up appointments

Patients should seek medical attention if they develop persistent fever, worsening pain, heavy bleeding or significant changes in bowel function after surgery.

A patient being assessed after colorectal surgery

Preparing for a Smoother Colorectal Surgery Journey

Colorectal surgery can feel daunting, but understanding what to expect before, during and after the procedure may help patients feel more prepared for the treatment journey ahead. Close communication with your colorectal surgeon and proper follow-up care can help support recovery and long-term outcomes after surgery.

Colorectal Practice manages a wide range of colorectal diseases, including conditions that may require procedural or surgical treatment. Led by Dr Dennis Koh together with Dr Sharon Koh and Dr Pauleon Tan, the team is experienced in advanced colorectal surgery, minimally invasive techniques and post-operative recovery management.

Patients are guided through each stage of the treatment journey with attention to surgical planning, recovery expectations and long-term care. If you would like further evaluation for colorectal symptoms or would like to better understand your surgical options, arrange a consultation with our specialists.

FAQs About Colorectal Surgery

  • Will I need to stop my regular medications before colorectal surgery?

    Some medications may need to be adjusted or temporarily stopped before surgery, particularly blood thinners or certain supplements. Patients are usually advised individually based on their medical history and planned procedure.

  • How long does colorectal surgery usually take?

    The duration of surgery can vary depending on the condition treated, the complexity of the procedure and the surgical technique used.

  • What happens if additional findings are discovered during surgery?

    In some cases, the surgical team may need to adjust the planned procedure depending on findings identified during the operation. This is usually discussed with patients during the consent process before surgery.

Meet Our Team of Specialists

Dr Dennis Koh
Dr Dennis Koh
Medical Director & Senior Consultant Colorectal Surgeon
MBBS (Nottingham), B Med Sci (Nottingham), MMed (Surgery), FRCS (Edinburgh), FAMS
Dr Dennis Koh is the Medical Director and Senior Consultant Colorectal Surgeon at Colorectal Practice. He graduated from the University of Nottingham, UK and completed advanced surgical training in Singapore, becoming a Fellow of the Royal College of Surgeons of Edinburgh and the Academy of Medicine, Singapore. Formerly a Consultant at Singapore General Hospital, he has extensive experience in open and minimally invasive colorectal surgery, as well as advanced endoscopy, with over 10,000 procedures performed. He also specialises in proctology and pelvic floor disorders and is actively involved in training and teaching future surgeons.
About Dr Dennis Koh
Dr Sharon Koh
Dr Sharon Koh
Senior Consultant Colorectal Surgeon
MBBS (Singapore), MMED (Surgery), FRCS (Edinburgh), FAMS
Dr Sharon Koh Zhiling is a Senior Consultant Colorectal Surgeon at Colorectal Practice, with subspecialty training in colorectal surgery, minimally invasive surgery and advanced endoscopy. She graduated from the Yong Loo Lin School of Medicine, NUS, and completed advanced surgical training at NUH and Singapore General Hospital, becoming a Fellow of the Royal College of Surgeons of Edinburgh and an accredited specialist in General Surgery. After receiving the Academic Medicine Development Award, she completed an 18-month fellowship in advanced colorectal surgery and inflammatory bowel disease at Cedars-Sinai Medical Center in Los Angeles. A former Director of Endoscopy at Alexandra Health, Dr Koh is also actively involved in research, international collaborations and medical education.
About Dr Sharon Koh
Dr Pauleon Tan Enjiu
Dr Pauleon Tan
Senior Consultant Colorectal Surgeon
MBBS (Singapore), MMed (Surgery), FRCS (Edinburgh), FAMS
Dr Pauleon Tan graduated from the Yong Loo Lin School of Medicine, NUS, and obtained his Master of Medicine (Surgery) before becoming a Fellow of the Royal College of Surgeons of Edinburgh. Awarded the Ministry of Health's Health Manpower Development Plan (HMDP) Award, he completed advanced colorectal training at Saitama International Medical Center in Japan, refining techniques such as D3 colorectal resections for cancer surgery. With over 15 years in public hospitals including SGH, TTSH and KTPH, he is experienced in both open and minimally invasive colorectal surgery, as well as advanced endoscopy procedures such as ESD. Dr Tan is also passionate about colorectal cancer prevention and screening and has held leadership and teaching roles in national screening programmes and surgical residency training.
About Dr Pauleon Tan
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Mount Elizabeth Medical Centre, Singapore 228510