Investigation: a disposable complaint history search was performed for this lot and found no reports for similar issues on this lot.A review of the device history record (dhr) for this unit showed no irregularities during manufacturing that were relevant to this issue.According to therapeutic apheresis: a physician's handbook, adverse events occur during therapeutic procedures with a frequency of 4.8%.Symptoms of these allergic reactions may include hives, dyspnea, wheezing, burning eyes, tachycardia, hypotension, and or facial swelling and flushing.Mild reactions can be treated with diphenhydramine administered through an iv root cause investigation and conclusion: a definitive root cause for the patient's reaction could not be determined.Based on customer's statements about the allergic reaction, possible causes for the patient's reaction include but are not limited to the patient's pre-existing condition and/or medication, an allergy to replacement solution and/or patient sensitivity to eto.
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