Additional information added to h6 and h10: the sample was not returned and the lot number of the device was unknown; therefore, a sample analysis could not be completed.Should additional relevant information become available, a supplemental report will be submitted.The prismaflex operator manual recommends to not connect additional devices between the return line and the blood access device.The following warning messages are present: always connect the return line directly to the blood access device.Do not connect additional devices between the return line and the blood access device.The use of additional devices, such as three-way valves, stopcocks, or extension lines, may impair return pressure monitoring.Their use can impede the detection of return disconnections, potentially resulting in severe blood loss.Air may enter into the extracorporeal circuit at connection points downstream of the air detector if pressures are negative.Ensure that the patient's blood return connection is firmly secured.Do not connect additional devices between the return line and the blood access device.
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