Additional method code: device not returned (4114).Investigation ¿ evaluation.Nhs-new hospital complex in canada informed cook of an incident involving an ultrathane multi-purpose drainage.On 23jun2020 the nephroureterectomy tubes were encrusting and needed to be as changed as soon as 9 days.Cook was informed on 05aug2020 that this same patient has required tube exchanged due to encrusting for approximately every 8 weeks over the last five years.This complaint was reported under medwatch report #:1820334-2020-01533.The patient has been compliant with regulatory flushing the tubes.No unintended section of the device remained inside the patient¿s body and there have been no adverse effects to the patient due to this occurrence.However, the patient requires more frequent tube exchanges due to the encrustation.From a global sales shipment report, cook was able to narrow down the rpn this complaint pertains to which is a ultrathane mac-loc locking loop multipurpose drainage catheter.Therefore, the investigation was completed on this device.A review of the complaint history, device history record, drawing, instructions for use (ifu), manufacturing instructions, and quality control of the device were conducted during the investigation.The complaint device was not returned; therefore, no physical examinations could be performed.However, a document based investigation evaluation was performed.Sufficient inspection activities are in place to identify this failure mode prior to distribution.The risks associated with these devices are acceptable when weighed against the benefits.The device is shipped with instruction for use (ifu) which provides the following information to the user related to the reported failure mode: warnings: ¿if a catheter has become malposition or if drainage ceases, the catheter should be promptly exchanged or removed.¿ precautions: ¿catheters should be irrigated on a routine basis to ensure function.Patients with indwelling drainage catheters should be evaluated routinely to ensure continuous function of the catheter.¿ in response to this incident, cook could not complete a review of the device history record (dhr) due to lack of lot information from the user facility.A global sales shipment report was conducted from 01jan2017 through 23jun2020 for possible devices.The customer bought 14 lots of only one device rpn meeting the description provided.A complaint search was conducted on these 14 lots and no complaints were found.A nonconformance search was conducted on these 14 lots and no related nonconformances were found.There is no evidence suggesting nonconforming product from the affected lot exists in house or in the field.A definitive conclusion could not be determined why the nephroureterectomy tubes were encrusting.Findings of this investigation revealed no evidence to suggest the device was manufactured out of specification.It was reported that the customer was regularly flushing the tubes.It is possible the patient¿s diet or anatomy contributed to the failure.Based on the information provided, no returned product and the results of the investigation, the investigation conclusion for this complaint is cause traced to an adverse event related to the patient¿s condition.The appropriate personnel have been notified.Cook will continue to monitor for similar complaints.Per the quality engineering risk assessment no further action is required.This report is required by the fda under 21 cfr part 803 and is based on unconfirmed information submitted by others.Neither the submission of this report nor any statement contained herein is intended to be an admission that any cook device is defective or malfunctioned, that a death or serious injury occurred, nor that any cook device caused, contributed to, or is likely to cause or contribute to a death or serious injury if a malfunction occurred.
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