Hygrobac Heat & Moisture Exchangers

Hygrobac HME filters from Cardinal Health sit inline between the patient and the ventilator or breathing circuit, doing two jobs at once: warming and humidifying inspired gas the way an intact upper airway normally would, and trapping airborne contaminants before they reach the patient or the machine. For intubated and ventilated patients whose natural humidification is bypassed, that passive conditioning is what protects the airway mucosa, keeps secretions from thickening, and reduces the risk of circuit-related infection.

This collection carries the two core configurations respiratory therapists reach for. The Cardinal Health Hygrobac Electrostatic Filter / HME (352U5805) pairs efficient heat and moisture exchange with electrostatic bacterial and viral filtration, making it a practical choice for standard adult ventilation where both humidification and filtration matter. The Hygrobac S Heat Moisture Exchanger (352U5877) is the hydrophobic/pleated variant, valued for its filtration performance and low resistance. Both are rated at roughly 1.0 cm H2O pressure drop, so they add minimal work of breathing to the circuit.

Two questions come up most when clinicians stock these. First, how often to change them: Hygrobac HMEs are single-patient devices typically replaced every 24 hours, or sooner if secretions, blood, or visible moisture compromise the media. Second, when an HME is appropriate at all: passive exchangers suit most adult patients with adequate tidal volumes and manageable secretions, whereas patients with thick or copious secretions, hemoptysis, or hypothermia usually need active heated humidification instead.

Because Hygrobac units combine moisture conditioning with an integrated filter, they can simplify a circuit by removing the need for a separate breathing filter in many setups. Explore the rest of our Respiratory Care range for complementary circuit components and airway management supplies.