MAUDE Adverse Event Report: Thoratec Corporation HEARTMATE®, MOBILE POWER UNIT, N/A; Ventricular (Assist) Bypass

Model Number	107754
Medical Device Problem Code	Complete Loss of Power (4015)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	08/29/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the patient had many no external power alarms.The patient stated that they pull on the mobile power unit (mpu) when going to the restroom and wanted to verify how often the event occurred.The log files were submitted for review.No external power events were recorded on (b)(6) 2026 at 1:01:17 and on (b)(6) 2026 at 3:11:32 that was likely caused by power to the mpu being briefly interrupted.There was another no external power event recorded on (b)(6) 2026 at 20:23:13 that appeared to have been accidental as the patient was attempting to switch from the mpu to battery power.The emergency backup battery (ebb) was used to support the system during the events.The ebb use count was 7.
Additional Manufacturer Narrative
No further information was provided.A supplemental report will be submitted once the manufacturer¿s investigation is complete.

• Brand Name: HEARTMATE®, MOBILE POWER UNIT, N/A
• Common Device Name: Ventricular (Assist) Bypass
• Manufacturer (Section D): Thoratec Corporation; 6035 stoneridge drive; pleasanton CA 94588
• Manufacturer (Section G): Thoratec Corporation; 6035 stoneridge drive; pleasanton CA 94588
• Manufacturer Contact: fredric gold ; 6035 stoneridge drive; pleasanton, CA 94588 ; +1(781)852-8207
• MDR Report Key: 50899838
• Report Number: 2916596-2026-2919726
• Device Sequence Number: 5903726
• Product Code: DSQ
• UDI-Device Identifier: 00813024010883
• UDI-Public: (01)00813024010883
• Combination Product (Y/N): N
• Initial Reporter State: VA
• Initial Reporter Country: US
• PMA/510(K) Number: P160054
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 09/25/2026

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: Lay User/Patient
• Device Model Number: 107754
• Device Catalogue Number: 107754
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 09/03/2026
• Initial Report FDA Received Date: 09/25/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Age: 73 YR
• Patient Sex: Female
• Patient Weight: 149 LB