The Bravo capsule detaches on its own as the esophageal lining naturally sheds and renews itself, releasing the tiny device within roughly 7 to 10 days. Once free, it passes through your digestive tract and exits in your stool without any need for retrieval or a second procedure.
How the Capsule Attaches in the First Place
Understanding how the capsule comes off starts with how it gets put on. During placement, a doctor positions the Bravo capsule against the wall of your esophagus, typically about 6 centimeters above the junction where the esophagus meets the stomach. A vacuum pump applies suction at over 510 mmHg for about 30 seconds, pulling a small nub of esophageal tissue into the device. A tiny pin then clips through that tissue, locking the capsule in place much like a piercing through skin. The capsule is small, roughly the size of a gel cap, and sits flush against the esophageal wall while it wirelessly transmits acid measurements to a receiver you wear on your belt.
The Natural Detachment Process
The lining of your esophagus is constantly replacing itself. Old surface cells slough off and new ones grow in underneath, a cycle that takes several days. The Bravo capsule is held in place only by that small pinch of tissue. As the cells around the pin turn over and shed, the tissue holding the capsule gradually weakens until it can no longer support the device. The capsule simply falls away from the wall.
This process typically takes 7 to 10 days, though most of the actual pH monitoring is finished within the first 48 to 96 hours. After detaching, the capsule drops into your stomach, travels through your intestines, and passes out naturally. You don’t need to look for it or save it. Most people never feel the moment it releases or notice it passing.
What Happens at the Attachment Site
The pin leaves behind a tiny shallow wound on the esophageal lining, comparable to a small ulcer or abrasion. Because the esophageal surface regenerates quickly, this spot heals on its own without treatment. It’s normal to feel mild chest discomfort or a sensation of something stuck in your throat for the first day or two after placement, but this usually fades well before the capsule actually detaches.
MRI Restrictions After Placement
The Bravo capsule contains a small magnet, which means you cannot have an MRI for 30 days after placement. This buffer exists because even though the capsule usually detaches within 7 to 10 days, there is a small chance it could linger longer. If the capsule were still inside your body during an MRI scan, the magnet could cause injury. The 30-day window provides a wide safety margin.
When the Capsule Doesn’t Detach on Its Own
In a small number of cases, the capsule stays attached longer than expected or causes enough discomfort that waiting isn’t practical. In a study of over 400 patients, about 1.8% needed an endoscopic procedure to dislodge the capsule, most often because of severe chest pain or difficulty swallowing. About 5% of patients overall report significant chest pain after placement, though only a fraction of those require early removal.
When removal is needed, doctors use an endoscope (a thin flexible camera passed through the mouth) and either nudge the capsule off the wall with the scope’s tip or use a cold snare, which is a small wire loop that clips the tissue holding the capsule. The cold snare approach has close to a 100% success rate with minimal complications, typically just brief, self-limited bleeding at the site. In some cases, nudging alone works, but if the tissue strips rather than releasing cleanly, a snare gives the doctor more control. Once freed, the capsule is pulled out through the mouth with a retrieval net.
What You’ll Notice During the Process
The short answer: probably nothing. The esophagus doesn’t have the same kind of sharp sensation nerves as your skin, so the moment the capsule releases is almost always silent. You won’t feel it traveling through your stomach or intestines either. The only physical reminder of the capsule is the mild soreness some people feel in the first couple of days after placement, which tends to resolve on its own. If you experience worsening chest pain, trouble swallowing, or a feeling that food is getting stuck days after placement, that could signal the capsule hasn’t detached normally and is worth bringing up with your doctor.