The cardiohelp was directly involved in the incident which occurred during treatment.It was reported that the touch panel was not responding.As stated by the technician in the communication grid of the complaint#(b)(4) the user interface hardware update kit (pn: 701073922 sn: (b)(6)) and new hmi board sn: (b)(6) was replaced.After replacement the unit passed all tests.(see also service order report 43487654).This work was performed on 2020-10-16/20/21.Based on this the reported failure "touch was not reponding"could be confirmed.The root causes for the reported failures to the cardiohelp touch panel is not responding is a known failure.The risk is mitigated in the cardiohelp risk analyses, chapter h1.1.3.18.The touch panel foil (material#70505.3579_rev.02) which was used formerly showed an increased rate of connection problems.As a solution for that a new touch panel was implemented as part of the cardiohelp user interface hardware update kit (material#70107.3922) in september, 2019.Regarding to the replacement of this part a service bulletin (issue 82 / 2019-09-25) was already provided.The occurrence rate related to the reported issue is currently being monitored as part of maquet cardiopulmonary¿ s trending program and additional investigations or corrections will be implemented in case of adverse trending.
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