During endoscopic procedures, such as a colonoscopy, medical professionals examine the internal lining of organs like the colon. Should any abnormal growths, known as polyps, be identified, they can often be removed during the same procedure. To manage the site where a polyp was removed or to address other internal concerns, specialized small tools are sometimes deployed.
Understanding Polyp Clips
A polyp clip, also referred to as a hemostatic clip or hemoclip, is a small medical device used internally to close tissue or hold it in place. These clips are primarily designed for temporary use within the body. They are commonly manufactured from biocompatible materials, such as surgical stainless steel, titanium alloy, or nitinol. Some clips are also made from absorbable materials designed to gradually dissolve in the body.
Visual Characteristics of a Polyp Clip
Polyp clips are remarkably small, typically measuring around 6 millimeters in length and 1.2 millimeters in width at their prongs. They often resemble a tiny stapler or small pincers. Most are metallic, exhibiting a subtle sheen. Some designs feature two or three prongs, enhancing their ability to grasp tissue.
These clips are delivered through the narrow channel of an endoscope, allowing precise placement under direct visual guidance. They are deployed from a compact, retracted state, expanding to an open form before closing securely onto the target tissue. Some clips can be rotated, reopened, or reclosed multiple times during placement for optimal positioning. Once deployed, the clip remains internally, its small size and placement preventing any external sensation or visibility.
Function and Natural Passage
Polyp clips serve several functions within the gastrointestinal tract, primarily to prevent or stop bleeding. They are frequently used after a polyp has been removed to close the site, to minimize post-procedure bleeding. These clips can also be applied to treat bleeding ulcers or to close small perforations in the tissue. The clip works by clamping tissues and applying direct pressure to blood vessels, sealing them and promoting healing.
After serving their purpose, these clips naturally detach from the internal tissue. This detachment typically occurs within a few days to several weeks, with many clips passing within 3 to 14 days. Once detached, the small metallic clip passes harmlessly out of the body during a normal bowel movement. Patients generally do not notice when the clip is passed. While most clips are MRI compatible, individuals should inform their healthcare provider if they have an internal clip before undergoing an MRI.