1. The regional distribution of ventilation was studied with a 133Xe wash-out technique both after rebreathing and after intravenous injection of the isotope in six patients with chronic obstructive lung disease. Measurements were performed in the sitting position during spontaneous and augmented abdominal breathing respectively. The contribution to ventilation of the rib-cage and abdomen was m...

Objects: The purpose of this study was to observe a correlation between PETCO2 and PaCO2 in intubated neonates under intermittent mandatory ventilation with spontaneous breathing. Material and methods: A total of 55 paired PETCO2 measured by mainstream capnometry and PaCO2 values were obtained from 4 intubated neonates in our neonatal intensive care units at Nagano Children’s Hospital, Nagano, ...

background: anxiety among patients after surgery can affect their physiological and psychological well-being. the aim of this study was to investigate and compare the effects of benson’s relaxation and rhythmic breathing techniques on postoperative anxiety in candidates for the mastectomy surgery. methods: this randomized controlled clinical trial study was conducted with ninety patients in 201...

The mechanisms generating intrinsic or auto-positive end-expiratory pressure (PEEP) during controlled mechanical ventilation in a relaxed patient also occur during spontaneous breathing or when the patient triggers the ventilator during an assisted mode [1, 2]. These include an increased time constant for passive exhalation of the respiratory system, a short expiratory time resulting from a rel...

STUDY OBJECTIVES To evaluate the effects of spontaneous breathing at ambient airway pressure (Paw) and during airway pressure release ventilation (APRV) on respiratory work and respiratory muscle blood flow (RMBF) in experimental lung injury. DESIGN Prospective experimental study. SETTING Research laboratory of a university hospital. SUBJECTS Twelve hemodynamically stable, analgosedated, ...

The relationship of respiratory sinus arrhythmia amplitude (RSA) to tidal volume and breathing frequency was quantified during voluntarily controlled tidal volume and breathing frequency and spontaneous quiet breathing. Seventeen seated subjects breathed via mouthpiece and nose-clip, maintaining constant tidal volumes at each of several breathing frequencies. Inspiratory breath hold was zero fr...

Weaning from mechanical ventilation is a 2-step process. First, objective criteria are used to determine whether sufficient recovery from acute respiratory failure has occurred to allow the patient to breathe independently. This “readiness test” is followed by a spontaneous breathing trial (SBT) to assess whether the patient still requires mechanical ventilatory support. When the patient tolera...

Questions: In adults with an acute exacerbation of chronic obstructive pulmonary disease (COPD) receiving non-invasive positive pressure ventilation (NIV), is intrapulmonary percussive ventilation (IPV) feasible? Does IPV improve outcomes compared to manual airway clearance techniques? Design: Randomised, controlled trial with concealed allocation. Setting: Intensive care unit of a tertiary hos...

Questions: In adults with an acute exacerbation of chronic obstructive pulmonary disease (COPD) receiving non-invasive positive pressure ventilation (NIV), is intrapulmonary percussive ventilation (IPV) feasible? Does IPV improve outcomes compared to manual airway clearance techniques? Design: Randomised, controlled trial with concealed allocation. Setting: Intensive care unit of a tertiary hos...