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Follow up is being attempted, no response recieved to date.Investigation description a dhr review was performed and no deviations or ncrs were found to be initiated for lot# 230998.Risk assessment per fmea-00138 [b], the complaint may be associated with the following potential failure mode: potential failure mode 1: user fails to follow recommendations of abandonment; 1) if no descent (progress) of the head occurs after 2 tractions.2) if delivery is not achieved or imminent after 4 tractions, or 3) if the vacuum cup detaches ("pops-off") twice.Potential effects: excessive attempts lead to fetal or maternal injury.Potential failure mode 2: user fails to establish appropriate level (450 - 600 mmhg) of vacuum.Potential effects: the device disengages/pops off the fetal head.Potential failure mode 3: user creates vacuum but fails to exclude any maternal tissue potential cause: failure to exclude any maternal tissue causes cup detachment/pop-off.Harm 1: hematoma.Severity: 4.Potential cause: lack of attention, not qualified personnel.Probability of occurrence: 1.Risk is considered "monitor".Harm 2: abrasion.Severity: 2.Potential cause: lack of attention, not qualified personnel.Probability of occurrence: 1.Risk is considered "acceptable".Harm 3: fracture.Severity: 3.Potential cause: lack of attention, not qualified personnel.Probability of occurrence: 1.Risk is considered "acceptable".Harm 4: laceration.Severity: 3.Potential cause: lack of attention, not qualified personnel.Probability of occurrence: 1.Risk is considered "acceptable".Harm 5: death.Severity: 5.Potential cause: lack of attention, not qualified personnel.Probability of occurrence: 1.Risk is considered "monitor".Root cause analysis: a root cause could not be determine because the device was not returned for evaluation.User error and device malfunction cannot be ruled out as potential root causes.
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