A respiration sensor fluid delivery device is provided. The device includes first and second nasal exhalation flow passages that extend through the device, wherein the first and second nasal exhalation flow passages can be aligned in parallel to one another with respect to a nasal respiratory flow direction. A housing of the respiration sensor fluid delivery device fluidly couples with one of a nasal cannula assembly and a respiratory mask assembly. The device provides for respiration monitoring of a subject via a sensor and fluid delivery, such as oxygen, to the subject. Methods of using a respiration sensor fluid delivery device and fluid delivery devices are also provided.

A patient interface comprising a plenum chamber pressurisable to a therapeutic pressure, a seal-forming structure constructed and arranged to maintain said therapeutic pressure in the plenum chamber, a positioning and stabilising structure to provide a force to hold a seal-forming structure in a therapeutically effective position on a patients head. The positioning and stabilising structure comprising at least one arm configured to be positioned adjacent to a cheek of the patient, and a strap removably received around the arm and configured to contact a posterior region of the patients head. The strap comprising a first coupling having a mechanical connector that is configured to engage the arm and limit movement of the arm into and out of the cavity, a second coupling spaced apart from an outer surface of the first coupling, and a sleeve being folded over the second coupling and positioned between the first and second couplings.

A patient interface comprising a plenum chamber pressurisable to a therapeutic pressure, a seal-forming structure constructed and arranged to maintain said therapeutic pressure in the plenum chamber, a positioning and stabilising structure to provide a force to hold a seal-forming structure in a therapeutically effective position on a patients head. The positioning and stabilising structure comprising at least one arm configured to be positioned adjacent to a cheek of the patient, and a strap removably received around the arm and configured to contact a posterior region of the patients head. The strap comprising a first coupling having a mechanical connector that is configured to engage the arm and limit movement of the arm into and out of the cavity, a second coupling spaced apart from an outer surface of the first coupling, and a sleeve being folded over the second coupling and positioned between the first and second couplings.

A process for monitoring a measuring system (110) for mechanical ventilation of a patient (20) is carried out while a fluid connection (40) is established between the patient (20) and a medical device (100). A gas sample is suctioned from the fluid connection (40) and is sent through a gas sensor fluid-guiding unit (52) to a gas sensor array (50). A time curve of the CO2 concentration and O2 concentration in the suctioned gas sample are determined. A concentration change curve of the change over time of the CO2 concentration and the O2 concentration are calculated. A search is made for a time period in which the two concentration change curves continuously have the same sign. Upon detecting such a time period it is checked whether a predefined first leak criterion is met. When this is the case, an indication of a leak (L) is detected.

A method for performing a medical procedure requiring effective, reliable and foolproof delivery of controlled amounts of a medical grade gas to a patient includes providing a compressed gas cylinder having a weight with medical grade gas sealed therein of at least twelve grams and not greater than fifty grams. The method also includes connecting the compressed gas cylinder to an integrated compressed gas unit including a regulator valve assembly positioned between an outlet port and an inlet port, wherein the regulator valve assembly includes a press button actuator and regulator adjustment dial. A flow control system is secured to the compressed gas unit and the medical grade gas is delivered in precisely controlled amounts by actuating the compressed gas unit and operating the flow control system to deliver the medical grade gas to vasculature of the patient.

A protective headgear includes a main body (e.g., face mask) that is worn over the face. The main body has an inhalation port that is for fluid coupling to an inhalation gas source and at least one exhalation port. The headgear includes an HME unit that has an inhalation leg that is in fluid communication with the inhalation port and a top leg that is in fluid communication with the inhalation leg and the at least one exhalation port. The top leg has an open window formed therein. The HME unit further includes an HME membrane that is disposed within the top leg adjacent the open window such that the HME membrane completely covers the open window.

A protective headgear includes a main body (e.g., face mask) that is worn over the face. The main body has an inhalation port that is for fluid coupling to an inhalation gas source and at least one exhalation port. The headgear includes an HME unit that has an inhalation leg that is in fluid communication with the inhalation port and a top leg that is in fluid communication with the inhalation leg and the at least one exhalation port. The top leg has an open window formed therein. The HME unit further includes an HME membrane that is disposed within the top leg adjacent the open window such that the HME membrane completely covers the open window.

A therapy system configured to wash out or flush out the oral and/or nasal cavity to reduce the effective dead space and reduce the work of breathing. The system may displace the expired air in the oral and/or nasal cavity with atmospheric air, or air with altered concentrations, for example, increased humidity, or oxygen levels. A sealed oral interface is provided to the mouth of a patient to supply a volume of pressurized gas. A control system to synchronize the supply of pressurized gas with the patients respiratory cycle. The supply of respiratory gas may be provided during only a portion of the respiratory cycle.

A swivel elbow and connector assembly for a patient interface system includes a ring (128) configured to be sealingly secured in an aperture of the patient interface system and an elbow (125) swivably secured in the ring (128). The ring (128) includes a first side (128(1)) in an interior of the patient interface system and a second side (128(2)) at an exterior of the patient interface system when the ring (128) is secured in the aperture. The ring (128) comprises a first flange on the first side and a second flange on the second side, the first and second flanges defining a channel (128(3)) that sealingly engages the aperture of the patient interface system. An inner surface (128(4)) of the ring (128) is partially spherical and an outer surface (125(3)) of the elbow (125) is partially spherical and the elbow (125) and the ring (128) form a ball and socket connection.

A swivel elbow and connector assembly for a patient interface system includes a ring (128) configured to be sealingly secured in an aperture of the patient interface system and an elbow (125) swivably secured in the ring (128). The ring (128) includes a first side (128(1)) in an interior of the patient interface system and a second side (128(2)) at an exterior of the patient interface system when the ring (128) is secured in the aperture. The ring (128) comprises a first flange on the first side and a second flange on the second side, the first and second flanges defining a channel (128(3)) that sealingly engages the aperture of the patient interface system. An inner surface (128(4)) of the ring (128) is partially spherical and an outer surface (125(3)) of the elbow (125) is partially spherical and the elbow (125) and the ring (128) form a ball and socket connection.