MAUDE Adverse Event Report: STRYKER NEUROVASCULAR-UTAH-SALT LAKE CITY TREVO NXT 4MM X 41MM - US; NEUROVASCULAR MECHANICAL THROMBECTOMY DEVICE FOR ACUTE ISCHEMIC STROKE TREATMENT

Model Number	90314
Medical Device Problem Code	Difficult to Remove (1528)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	12/29/2020
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
This is 1st of 2 reports.Device is not available to manufacturer.
Event or Problem Description
It was reported that the retriever (subject device) had difficulty being withdrawn from the patient's vessel during the procedure.The subject retriever experienced resistance inside the microcatheter while being removed from the patient's anatomy.The procedure was completed successfully.No clinical consequences were reported to the patient due to this event.
Additional Manufacturer Narrative
H4 manufacturing date ¿ added d4 expiration date - added based on the results of the dhr review, there is no indication that the device, labeling or packaging failed to meet its specifications when released.The subject device is not available; therefore, visual and functional testing as well as physical analysis cannot be performed.The reported complaint could not be confirmed, and it could not be definitively determined if the device failed to meet specifications because the product was not returned.The reported event is covered in the device directions for use (dfu).As well, the risk of the reported event is documented in the risk documentation and there are current controls to mitigate the risk of the as reported event.It was reported that the "subject retriever felt sticky and jumpy when delivering through a microcatheter and during unsheathe which they said was unsettling.Every pass was difficult in tracking." additional information provided by the customer indicated that no anomalies were noted to the device after removal from the packaging or prior to preparation, the device was prepared as per the dfu, the anatomy was moderately tortuous, continuous flush was maintained throughout the procedure, resistance was encountered while loading but "jumping" was felt while the device was being unsheathed in the vessel, and force was applied to overcome resistance to advance/withdraw the retriever.While there are a number of potential causes for the reported issue, because review and analysis of available information failed to identify a definitive cause and the device was not returned, an assignable cause of undeterminable will be assigned to this complaint.
Event or Problem Description
It was reported that the retriever (subject device) had difficulty being withdrawn from the patient's vessel during the procedure.The subject retriever experienced resistance inside the microcatheter while being removed from the patient's anatomy.The procedure was completed successfully.No clinical consequences were reported to the patient due to this event.

• Brand Name: TREVO NXT 4MM X 41MM - US
• Common Device Name: NEUROVASCULAR MECHANICAL THROMBECTOMY DEVICE FOR ACUTE ISCHEMIC STROKE TREATMENT
• Manufacturer (Section D): STRYKER NEUROVASCULAR-UTAH-SALT LAKE CITY; 4870 west 2100 south; salt lake city UT 84120
• MDR Report Key: 11227209
• Report Number: 3012931345-2021-00019
• Device Sequence Number: 11640824
• Product Code: POL
• UDI-Device Identifier: 07613327299946
• UDI-Public: 07613327299946
• Combination Product (Y/N): N
• Initial Reporter State: OR
• Initial Reporter Country: US
• PMA/510(K) Number: K200117
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: health professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 03/17/2021

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Expiration Date: 10/07/2022
• Device Model Number: 90314
• Device Catalogue Number: 90314
• Device Lot Number: 00000052757
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 01/05/2021
• Supplement Date Received by Manufacturer: 02/23/2021
• Initial Report FDA Received Date: 01/25/2021
• Supplement Report FDA Received Date: 03/17/2021
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Concomitant Medical Products and Therapy/Usage Dates: TREVO TRAK 21 MICROCATHETER (STRYKER); TREVO TRAK 21 MICROCATHETER (STRYKER)