What is PillCam / Capsule Endoscopy?
Capsule endoscopy, commonly known by the brand name PillCam, is a non-invasive diagnostic procedure that uses a tiny, swallowable camera to capture detailed images of the gastrointestinal tract — particularly the small intestine, an area that is difficult to reach with traditional endoscopy or colonoscopy.
The capsule is about the size of a large vitamin pill and contains a miniature camera, light source, battery, and wireless transmitter. Once swallowed, it travels naturally through your digestive system, taking thousands of high-resolution photographs as it moves. These images are wirelessly transmitted to a small data recorder worn on a belt around your waist, allowing Dr. Khan to later review a complete visual record of your small bowel.
How Does It Work?
The capsule endoscopy process is simple and comfortable. At your appointment, you will swallow the PillCam capsule with a glass of water. A sensor belt or array of sensors will be placed on your abdomen, connected to a portable data recorder that you wear throughout the test.
As the capsule travels through your esophagus, stomach, and small intestine, it captures approximately 2 to 6 images per second — totaling tens of thousands of photographs over the course of the exam. The entire recording period typically lasts about 8 hours, during which you can go about most of your normal daily activities.
After the recording period is complete, you return to our office to return the data recorder and sensor equipment. The capsule itself passes naturally through the remainder of your digestive tract and is eliminated with a normal bowel movement, typically within 24 to 72 hours. It does not need to be retrieved.
Why is Capsule Endoscopy Performed?
Dr. Khan may recommend capsule endoscopy to evaluate a range of conditions affecting the small intestine. Common indications include:
- Obscure gastrointestinal bleeding: When upper endoscopy and colonoscopy have not identified the source of bleeding, capsule endoscopy can detect lesions in the small bowel that may be responsible, such as angiodysplasias, ulcers, or small tumors.
- Crohn's disease evaluation: Capsule endoscopy is highly effective for detecting small bowel inflammation, ulceration, and strictures associated with Crohn's disease, and can help assess disease extent and activity.
- Celiac disease monitoring: For patients with celiac disease, capsule endoscopy can evaluate the degree of small intestinal damage and monitor response to a gluten-free diet.
- Small bowel tumors: The procedure can identify polyps, benign growths, and malignant tumors in the small intestine that would otherwise be difficult to detect.
- Unexplained abdominal pain: When standard testing has not revealed a cause for chronic abdominal symptoms, capsule endoscopy may uncover abnormalities in the small bowel.
- Iron-deficiency anemia: In patients with unexplained iron-deficiency anemia, capsule endoscopy can identify sources of occult blood loss in the small intestine.
Preparation
Proper preparation helps ensure that the capsule captures the clearest possible images. Dr. Khan will provide you with specific instructions tailored to your situation, which generally include:
- Clear liquid diet: You will be asked to consume only clear liquids for the entire day before the procedure. This helps clear the small intestine for optimal visualization.
- Fasting: You must fast (no food or drink) for at least 12 hours before swallowing the capsule, typically beginning the evening before your appointment.
- Medication adjustments: Inform Dr. Khan about all medications and supplements you take. Certain medications — including iron supplements and medications that slow gut motility — may need to be temporarily stopped before the exam.
- Bowel preparation: In some cases, a mild laxative prep may be recommended the evening before to improve small bowel visualization.
During the Procedure
On the day of your capsule endoscopy, you will arrive at GastroCares for a brief appointment. The nursing staff will attach sensor pads to your abdomen and fit you with the portable data recorder. You will then swallow the PillCam capsule with a small amount of water.
After swallowing the capsule, you are free to leave the office and resume light activities such as walking, reading, or working at a desk. You should avoid vigorous physical activity and activities that involve bending or heavy lifting.
You may begin drinking clear liquids 2 hours after swallowing the capsule and eat a light meal after 4 hours, unless Dr. Khan advises otherwise. It is important not to disconnect the data recorder or remove the sensors during the recording period.
After the Procedure
Once the 8-hour recording period is complete, you will return to the office to return the data recorder and sensor equipment. Dr. Khan will then download and carefully review the thousands of captured images, analyzing each frame for abnormalities.
The PillCam capsule will pass naturally through your digestive system, usually within 24 to 72 hours. You do not need to retrieve the capsule. If you do not notice the capsule passing within two weeks, contact our office so we can confirm it has been expelled.
Dr. Khan will review the complete results and contact you to discuss the findings, typically within one to two weeks. Based on the results, further testing or treatment may be recommended.
Benefits
Capsule endoscopy offers several important advantages over other diagnostic methods:
- Non-invasive: No tubes, scopes, or instruments are inserted into the body — you simply swallow a pill.
- No sedation required: Unlike traditional endoscopy or colonoscopy, capsule endoscopy does not require anesthesia or sedation, so there is no need for a driver or recovery time.
- Comfortable: Most patients find the procedure easy and well-tolerated, with no pain or discomfort.
- Visualizes the entire small bowel: Capsule endoscopy can examine areas of the small intestine that are beyond the reach of standard upper endoscopy and colonoscopy, providing a comprehensive view of the entire small bowel.
- Resume normal activities: You can go about most of your daily routine during the recording period.
Risks and Limitations
Capsule endoscopy is a very safe procedure, but as with any medical test, there are some risks and limitations to be aware of:
- Capsule retention: In rare cases (approximately 1-2% of procedures), the capsule may become lodged in the digestive tract, typically at the site of an existing stricture or narrowing. This may require endoscopic or, rarely, surgical retrieval. Patients with known or suspected strictures may undergo a patency capsule test beforehand to assess whether it is safe to proceed.
- Incomplete examination: If the capsule battery expires before it has traveled through the entire small intestine, some areas may not be visualized. This occurs in a small percentage of cases and may require a repeat study.
- Cannot take biopsies: Unlike traditional endoscopy, capsule endoscopy is a diagnostic imaging tool only. If an abnormality is found, a follow-up procedure such as balloon-assisted enteroscopy may be needed to obtain tissue samples or deliver treatment.
- Image quality: In some cases, residual food or fluid in the small bowel may affect image clarity, which is why proper preparation is essential.
If you are experiencing unexplained gastrointestinal symptoms or have been told you need small bowel evaluation, contact GastroCares to discuss whether PillCam capsule endoscopy is right for you.