Initially, the polyp is excised from the mucosal surface, often using an electrosurgical snare. Once the polyp is released from the gastric mucosa, it is important to rapidly and safely catch it and remove it from the body. It is important that the polyp is not damaged during removal, as it may be required for tissue analysis by a pathologist.
Grasping forceps are advanced down the working channel of the endoscope and manoeuvred into position using the endoscopic image. The field of view may be cleared using water irrigation expelled from the sheath of the forceps. The polyp is grasped firmly using the forceps. The polyp is then removed while held by the forceps.
Three-prong grasping forceps holdig a resected polyp in the colon
Smaller polyps may be extracted up the working channel of the endoscope; whereas, larger polyps will require removal of the endoscope. If extracting the polyp via the endoscope, it is important that the grasping forceps do not damage the interior of the working channel. Once removed, the polyp can be sent for pathological analysis.
Olympus supplies both reusable and single-use polyp retrieval devices. The reusable devices are fully autoclavable and the single-use devices are provided pre-sterilised. Reusable devices are available with three or five prongs. The three-pronged devices offer a wide grasp for larger items, while the five-pronged devices provide a sure and easy grasp of smaller polyps. Olympus’ polyp retrieval products are equipped with a ringed distal-tip design, which ensures minimal tissue damage. The devices also have a flexible sheath to minimise damage to the endoscope. The reusable devices have a built-in water irrigation connector in the hand grip, to give fingertip control of irrigation from the sheath.