The customer reported via e-mail to carefusion: they had five (5) 3100b circuits crack last week on the same patient.They unfortunately did not keep the lot numbers and threw out the circuits because patient was infectious.They report that the cracks were around the cap and diaphragms(4) and (1) by the bellows.Per additional information received on december 11, 2013, rts who were present when the circuits were cracked details to a carefusion representative: it seems that the cracks were due to the way the cases of circuits were handled, perhaps the box was dropped or damaged.Two of the cracks were on the bellows/water trap assembly, the piece that attaches to the circuit.The first crack was noticed when the rt was assembling the circuit and the piece was discarded, with the second one the rt noted that there was a crack on the bellows/water trap assembly but decided to use it anyway as the circuit passed the calibration check.The oscillator was started on the patient, but after 30 minutes of use they were steadily losing paw and they changed the circuit and noted that the crack had got bigger with use.The other 3 were found on the circuit where the cap and diaphragm is attached to the circuit, cracks were visualized on the circuit.The first one was discovered while on the patient and the other 2 on circuits they were going to use to replace the damaged circuit.The patient tolerated bagging while the circuits were replaced.The circuits were all taken into the room and the patient was on isolation, so they considered the circuits contaminated.
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