Heat and Moisture Exchangers Code Description Case Quantity 1853 Hydro-Therm™ small volume HME, at only 17 ml of dead space this device returns 30 mg of moisture at 500 mL Vt 50 1863 Hydro-Therm II™specialty HME, moisture return of 33 mg of water at 500 mL Vt and only 0.8 cm H2O resistance at 60 L/min over 24 hours 50 1853-T Hydro-Therm™ small volume HME with flextube patient connection 50 1863-T Hydro-Therm II™ with flextube patient connection 20 1870 Hydro-Trach T™ tracheotomy HME with integrated suction port 50 1871 Hydro-Trach T™ tracheotomy HME with integrated suction port and oxygen supply tubing 40