Intestinal Obstruction Treatment

Intestinal obstruction is a severe medical condition when a blockage in the intestines prevents the normal movement of food, fluids, and gas through the digestive tract. It can be life-threatening if left undiagnosed and untreated. 

Obstructions require timely medical attention to prevent complications like tissue death or infection.

Alternative Names

Intestinal obstruction is also commonly known as:

• Bowel Obstruction
• Gastrointestinal Obstruction

Types of Intestinal Obstruction

Intestinal obstruction can be classified into two main types based on the underlying mechanism of the blockage:

Mechanical Obstruction

Mechanical Obstruction type that involves a physical blockage, preventing the normal movement of intestinal contents. The obstruction may occur in the small or large intestine and can result from several structural abnormalities. It is the most common type and typically requires active medical or surgical intervention.

Functional Obstruction (Paralytic Ileus)

This is only a temporary slowdown of the bowel without the presence of an actual block, but the intestines aren’t moving properly. Rather, the intestines are unable to function normally because the muscles do not contract in a coordinated manner, which stops material from progressing through the digestive system. This problem is temporary and can be improved with appropriate management, but it may sometimes result in serious health issues. 

Acute colonic pseudo-obstruction (Ogilvie syndrome): 

Similar to Paralytic Ileus, a physical blockage is not present, but a severe bloating is caused by a stalled large bowel. The symptoms often improve with bowel rest in some cases need medicines or endoscopic decompression.

Causes of Intestinal Obstruction

These are the causes of obstruction:

• Hernias: A loop of intestine pushes through a weak abdominal wall, causing blockage or strangulation, requiring surgery.
• Adhesions: Scar tissue bands from prior surgeries can kink or tether intestines, leading to partial or complete obstruction.
• Tumours: Benign or cancerous growths narrow or block the intestines, especially in colorectal cancer, requiring surgery or stenting.
• Volvulus: Twisting of the intestine blocks contents and blood flow, causing pain and requiring immediate surgical correction.
• Intussusception: One bowel segment telescopes into another, causing blockage and reduced blood flow, which is more common in children.
• Scar-tissue adhesions (after previous surgery): These are the most common cause of small-bowel blockage.
• Colon/colorectal cancer: One of the most common causes of large-bowel blockage in adults.

Symptoms of Intestinal Obstruction

• Abdominal Pain and Cramping: The pain is usually crampy and comes in waves due to the intestine's attempt to push contents past the blockage. As the obstruction worsens, the pain may become constant and more severe, especially if the blood supply is affected.
• Vomiting: Vomiting may contain undigested food or bile, but as the condition progresses, it can become faecal-smelling, especially in severe cases with complete obstruction.
• Bloating and Abdominal Distension: Visible swelling of the abdomen frequently occurs as gas, fluids, and undigested food build up. This bloating can be quite uncomfortable and tends to be more severe with obstructions in the large intestine.
• Constipation or Inability to Pass Gas: This sign is often a warning of a significant issue and should not be overlooked, particularly if it occurs with abdominal pain or bloating.
• Nausea and Loss of Appetite: Patients often report a loss of interest in eating or drinking, which can lead to dehydration and nutritional deficiencies if not managed appropriately.
• Dehydration: Signs of dehydration include dry mouth, low urine output, dizziness, and fatigue. Electrolyte imbalances can occur, leading to complications such as abnormal heart rhythms or kidney dysfunction.
• Shock and Sepsis (in Advanced Cases): Signs include a rapid heart rate, fever, confusion, cold extremities, and a drop in blood pressure, all of which require immediate emergency care.

Intestinal Obstruction Risk Factors

Several underlying conditions and lifestyle-related factors can increase the risk of developing an intestinal obstruction. 

• Previous abdominal or pelvic surgery due to the formation of adhesions
• Inflammatory Bowel Disease (IBD), such as Crohn’s disease
• Advanced age, which is associated with slower gut motility and comorbidities
• History of cancers, particularly those involving the abdomen
• Radiation therapy to the abdomen or pelvis
• Abdominal/inguinal hernias
• Strong pain medicines (opioids)
• Certain medications that slow the gut (anticholinergics)
• Severe illness or long bed-rest
• Neurologic disease, and prior abdominal/pelvic radiation.

Complications of Intestinal Obstruction

Intestinal obstruction can lead to serious and potentially fatal complications if left untreated.

• Bowel Perforation: A tear in the intestine, leading to leakage of contents into the abdominal cavity
• Sepsis: A systemic infection resulting from the spread of bacteria
• Necrosis: Death of intestinal tissue due to lack of blood supply
• Short Bowel Syndrome (in cases where large segments are surgically removed)

Intestinal Obstruction Diagnosis

Physical Examination

A doctor may identify abnormal bowel sounds or signs of bloating and tenderness upon palpation. A rectal examination may also be performed.

Imaging Tests

• CT scan with contrast: This is the ideal test to identify the exact site and cause of obstruction as a plain X-rays can miss a blockage.
• Ultrasound: This is especially useful in children and during pregnancy.
• Water-soluble contrast: study done via NG tube or enema to spot the location of the block, and in some cases, dislodge it. Barium should be avoided in presence of a tear or perforation.

In some instances, additional tests like a barium enema or MRI may be required.

Intestinal Obstruction Treatment Options

Non-Surgical Treatments

• Nasogastric (NG) Tube: Inserted through the nose into the stomach to relieve pressure and drain contents
• Intravenous Fluids: To prevent dehydration and maintain electrolyte balance
• Bowel Rest: Patients may be kept on nil by mouth (NPO) to allow the bowel to recover

Surgical Treatments

• Bowel Resection: Removing the affected part of the intestine and reconnecting the healthy ends
• Stent Placement: Self-expanding metal stent (SEMS) can be used to open a large-bowel blockage if confirmed to be safe by a CT scan. 
• Lysis of Adhesions: Cutting the scar tissue causing the obstruction

Intestinal Obstruction Prevention Tips

You can take specific steps to lower your risk:

• Eat a fibre-rich diet to promote regular bowel movements
• Drink plenty of fluids to support gut health.
• Avoid self-medicating, particularly with opioids or anti-diarrheal medications.
• Schedule regular check-ups if you have inflammatory bowel disease (IBD) or a history of abdominal surgery.
• Seek prompt medical attention if you notice symptoms to help prevent complications.

Frequently Asked Questions

1. Who treats intestinal obstruction?

Gastroenterologists and general surgeons are primarily involved in diagnosing and treating intestinal obstruction. In more complex cases, colorectal surgeons or oncologists may also be involved, particularly if cancer is the underlying cause.

2. Can intestinal obstruction clear up without any medical intervention?

Some partial obstructions, particularly those caused by functional issues (like ileus), may resolve without surgery through conservative measures such as bowel rest and NG tube decompression. However, complete obstructions or those with complications always require medical intervention.

3. What are the long-term effects of intestinal obstruction?

If treated promptly and effectively, most patients recover fully. However, recurrent obstructions may occur, especially in patients with adhesions or chronic diseases like Crohn's. In some cases, there may be lasting effects, such as short bowel syndrome if large sections are surgically removed.

4. What is the recovery time after treatment?

Recovery depends on the type of obstruction and treatment provided. The duration of a hospital stay can vary from several days to more than a week in severe cases. Further follow-up visits are essential to monitor your recovery and help prevent future obstructions.

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