(b)(4).Method: the complaint rt330 circuit was received at fisher & paykel healthcare (b)(4) for evaluation.The inspiratory limb was visually inspected and the resistance of the heater wire was checked with a calibrated multimeter.Results: visual inspection confirmed that there was condensation in the inspiratory limb, as is expected from a circuit used with a humidification system.The resistance test showed that the inspiratory heater wire was within specification.Conclusion: it is likely that the condensation entered the patient's air path as a result of the movement of the patient from bed to his parent.Condensate in the humidification system, although not preferred, is an expected side effect of heated pass-over humidification systems in many conditions, and may vary between light misting to water droplets that form on the wall of cool breathing circuit tubing.The amount of condensate in the ventilation system is influenced by a number of multiple setup and environmental factors.The user instructions that accompany the rt330 include the following statements: attention: - patient monitoring is recommended.Warning: - when mounting a humidifier adjacent to a patient ensure that the humidifier is always positioned lower than the patient.
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