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The end user facility reported that during use of a conmed optimizer polypectomy snare in a colonoscopy procedure and while removing the polyp, the "small snare fell apart during the procedure".Follow-up with the user facility confirmed that the broken pieces were retrieved with no problems noted.Using another snare, the procedure was otherwise completed with no further complications or patient injury.This report is raised on the basis of potential injury with recurrence.Due to product contamination, the used/damaged device is not being returned to the manufacture for evaluation.
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As reported, due to contamination, the actual complaint device was not returned for evaluation.Also, no photograph or visual evidence of the used/damaged optimizer snare was provided for evaluation.However, 42 unopened devices from the same lot number were returned for evaluation.Of the 42 returned samples, 10 random samples were tested for minimum axial pull force.Four samples failed the axial pull test.Since the complaint device was not returned for evaluation, the reported failure cannot be verified and a root cause of the reported breakage cannot be determined.In this instance, without actual product, the failure analysis of the complaint device could not be completed therefore, the root cause of the reported breakage cannot be determined.Nonetheless, due to similar complaints, an investigation was opened to address this issue.This lot was manufactured prior to the initiation of the investigation.This lot was manufactured on 28-aug-2015.A review of the device history record for this lot found no ncr's and no note of discrepancies during the manufacturing process that could have caused or contributed to reported breakage.Of the lot containing (b)(4) units, there were 4 complaints received from the same facility for detachment of components.A 2-year review of product history for this device family showed a total of 14 reportable events (including this one) with a total of 16 units for device breakage.During this same 2-year time frame, over (b)(4) units were sold worldwide, making the occurrence rate for this reported failure mode (b)(4) percent.This failure mode is addressed in the risk document with an acceptable risk level.The conmed singular and conmed optimizer polypectomy snares are single patient use, one piece, disposable devices consisting of a proximal handle, outer sheath, internal drive wire, and distal wire loop.All parts of this device that exit the distal end of the endoscope are considered applied parts.To reduce the risk of breakage and injury to the patient, the instructions for use (ifu) provides the following precautions and warnings: this device is intended for single patient use only.The product and the packaging have not been designed or tested for reuse.The ability to effectively clean and re-sterilize this single use device and subsequent reuse may adversely affect the clinical performance, safety and/or sterility of the device.Inspect the snare device for kinks, fraying wire or any other damage that may have occurred during transit.Open and close the snare loop to confirm smooth movement.Do not use if snare device is damaged.Do not pretest the snare with electrocautery outside of the patient.This could cause overheating of the snare and cause it to fray or break during the procedure resulting in a potential burn to the patient.To help prevent inadvertent injury or perforation of internal organs and body structure, polypectomy should always be performed under direct endoscopic vision.The electrosurgical generator should be placed on the off position prior to advancing or removing the snare through the endoscope to avoid injury to the patient or equipment that results from improper electrical grounding.Ensure that the patient is grounded prior to use of the monopolar electrosurgical generator and polypectomy snare to avoid patient injury.Snares should only be used by or under the supervision of physicians thoroughly trained in endoscopic polypectomy and electrosurgical generator set-up and operation.Snares require an endoscope with a minimum working channel of 2.8 mm.
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