MAUDE Adverse Event Report: SIEMENS HEALTHCARE GMBH LUMINOS DRF MAX; IMAGE-INTENSIFIED FLUOROSCOPIC X-RAY SYSTEM

Model Number 10762471

Device Problem Unintended Movement (3026)

Patient Problem No Clinical Signs, Symptoms or Conditions (4582)

Event Date 12/08/2020

Event Type  malfunction  

Manufacturer Narrative

The investigation is on-going.A supplemental report will be submitted if additional information becomes available.Internal id# (b)(4).

Event Description

It was reported to siemens that the patient table of the luminos drf max system moved and tilted without given command.No patient involvement or injury were communicated to siemens.

Manufacturer Narrative

The issue was investigated in detail.The investigation included the analysis of the provided log files as well as inspection of the affected and returned joystick.Due to the "and"-link between the signal and the dmg (dead man grip) integrated in the joystick, a joystick-internal continuous signal can only be recorded in the log files when the dmg is activated.Therefore, in the reported case a joystick-internal continuous signal cannot be explicitly analyzed in the log files.The analysis of the log files showed that at the time of event a tilting movement was detected.Furthermore, an operation request from the rcc (remote control console) and a dmg activation from the rcc were found.There was no request for operation from the table control console.It could be seen that the operations are activated by the joystick.It is not apparent whether the motion requests were activated intentionally by the user.No error behavior could be detected in the log files and no continuous dmg error was recognized.The visual inspection of the joystick and the flat ribbon cable did not show any deviations, defects, or liquid penetration.Both parts were inconspicuous.The functional tests of the components were carried out in the system environment.The joystick has revision level 02, which indicates that the output signal of the joystick is connected to the dmg signal.This means that the joystick only changes its output signal when its dmg signal is active.The dmg sensor reacts to a hand getting close (touch by hand) but not, for example, to a pencil.Therefore, first the output signal was observed with a deflection of the joystick with a pencil.The recordings showed no changes in the signal.Subsequently, the dmg was activated by grasping the joystick with the hand without deflecting it.This resulted in a slight change in the signal, but it was still in a range that the scu (system control unit) does not recognize this as deflection of the joystick.The joystick was then deflected in both directions with varying speeds.The signal showed normal continuous course.The movement of the axis was also inconspicuous.The same tests were carried out with and without the flat ribbon cable.The results of both measurements were identical and inconspicuous.According to the involved service technician, the physicist coincidentally put his arm in close proximity to the joystick for system tilt and thereby activating the dmg signal.This behavior could not be confirmed or even reproduced during the investigation of the log files and the component.Based on the performed analysis and test results, no malfunction of the returned joystick could be identified; the joystick worked according to its specification.The function of the dmg also worked according to its specification and without any deviations.The described misbehavior could not be reproduced.The only possible cause for the described behavior could be unintentional operation.Since the replacement of the affected part, no further issues have been reported from the concerned site.

• Brand Name: LUMINOS DRF MAX
• Type of Device: IMAGE-INTENSIFIED FLUOROSCOPIC X-RAY SYSTEM
• Manufacturer (Section D): SIEMENS HEALTHCARE GMBH; siemenstrasse 1; forchheim, 91301 ; GM 91301
• MDR Report Key: 11037775
• MDR Text Key: 223806517
• Report Number: 3004977335-2020-59312
• Device Sequence Number: 1
• Product Code: OWB
• UDI-Device Identifier: 04056869009155
• UDI-Public: 04056869009155
• Combination Product (y/n): N
• PMA/PMN Number: K173639
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: user facility
• Type of Report: Initial,Followup
• Report Date: 12/18/2020

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 12/18/2020
• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Health Professional
• Device Model Number: 10762471
• Was Device Available for Evaluation?: Yes
• Date Manufacturer Received: 03/05/2021
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Other