(b)(4).The bc100 bubble cpap generator is sold/distributed as part of the bc151/bc161/bc171 bubble cpap delivery system in the us (510(k) : k100011).Method: the complaint bc100 bubble cpap generator and probe were returned to fph in (b)(6) for investigation.They were visually inspected and the dimensions of the lid and probe were measured.Results: no physical damage was observed to the returned bubble cpap generator and probe.The dimension of the probe was within the drawing specification; however, it was observed that the dimension of the lid of the complaint bubble cpap generator was out of specification.A lot check revealed no other complaint of this nature for lot number 161108.Conclusion: based on the investigation conducted, it is likely that the reported fault was due to the wider distance between the probe connection on the lid.The hospital reported that no patient harm occurred.The hospital reported that the event occured after a period of use, which suggests that the complaint bubble cpap generator had the "probe loose" as reported after the product was released for distribution.The existing design of the cpap probe is intended to be adjustable, which leads to the possibility of inadvertent movement.This risk has been considered in our hazard analysis and deemed to be acceptable due to the provision of a physical stop in the bubble cpap probe, to prevent the pressure from exceeding 10 cm h20, and the use of a pressure manifold with the breathing circuit, to reduce the risk of unsafe circuit pressure.The bubble cpap system is for use in the hospital clinic environment such as the neonatal intensive care unit (nicu) and paediatric intensive care unit (picu).The user instructions that accompany the bubble cpap system kit illustrate in pictorial format the correct set-up and proper use of the bubble cpap generator.It also states the following: - "always use pressure monitoring to verify that the patient is receiving the prescribed cpap level." - "regularly observe the cpap generator for bubbling.If bubbling is not observed, check for and minimize the air leaks in the system and at the patient.If air leaks have been minimized, air flow may be increased to achieve continuous bubbling.".
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