Ventilation

The objective of this study is to compare the effects of manual ventilation and AutoFlow ventilation, administered during the induction of general anesthesia, on cerebral (s-rSO₂) and peripheral (somatic) oxygenation (p-rSO₂) in geriatric patients.

Aim: to evaluate if the Choosing Wisely campaign can be introduced without harming critically ill patients. Background: Each year, around 45,000 patients are admitted to Sweden's 81 ICUs (intensive care units), costing 6-7 billion SEK (6% of total healthcare expenditure). The high costs of health care are partly attributable to overuse of diagnostic tests. Up to 30% of these tests lead to treatments that provide no benefit for patients, some of them may even be harmful(1-3). To improve quality of care while combating this problem of cost, the American Board of Internal Medicine Foundation developed the Choosing Wisely Campaign, tasking professional societies to develop lists of top five medical services patients and physicians should question. Patients in the ICU, can especially benefit from this paradigm shift. They are subjected to multiple testing on a daily - sometimes hourly - basis, therefore this field of medicine responded to the campaign quickly. Two sets of top-five-lists of tests and interventions that can be questioned have been published(4 5). In multiple countries, including Sweden, the Choosing Wisely campaign is gathering traction among critical care physicians and is on the verge of being introduced. It is both common-sensical and will save money, so health care leaders are positive. However, the investigators have an opportunity, and a duty, to assess the evidence; can the Choosing Wisely campaign be introduced without harming ICU patients? The present study thus aims to evaluate the introduction of the Choosing Wisely campaign in the context of the ICU. Is this change of care strategy associated with changes in 30-day-mortality? Secondary outcomes include ICU length of stay, use of non-invasive- or invasive mechanical ventilation and continuous renal replacement therapy. This is a registry-based cluster randomized controlled study (R-RCT), targeting Swedish ICU's across multiple regions. Primary and secondary outcomes will be retrieved from the Swedish Intensive care Register (SIR), making ICU participation easier and less costly.

Background: The Oxygen Reserve Index (ORI) is a non-invasive parameter utilizing multi-wavelength pulse co-oximetry. ORI can provide early warnings of deteriorating oxygenation before changes are reflected in SpO₂ levels. This study aimed to investigate the feasibility of non-ventilated intubation in patients undergoing cholecystectomy as a means to achieve safe intubation without nasogastric tube placement, with reduced trauma and cost, and improved time efficiency.

This study is a cluster randomized trial across 10 hospitals, stratified by hospital size (hospitals with greater than 100 mechanically ventilated patients a year will be classified as large, while those with 100 or fewer will be classified as small). Randomization will occur at the hospital level, ensuring an even distribution of large and small hospitals between study arms. Hospitals assigned to the intervention group will implement an EHR-based strategy designed to enhance adherence to lung-protective ventilation (LPV) for a 9-month intervention period, after which the strategy will be rolled out to all hospitals. The intervention focuses on modifying the ventilator order within the Electronic Health Record (EHR) to encourage default settings aligned with LPV principles. This study design allows for comparison of patient outcomes before and after implementation within each hospital while also enabling simultaneous comparisons between hospitals that have and have not yet received the intervention. The cluster randomization approach is necessary, given the order is controlled at the hospital level.

The goal of this clinical trial is to explore the clinical significance and value of the PRVC ventilation mode in Bariatric Surgery Patients. The main questions it aims to answer are： * Do different ventilation patterns affect intracranial pressure and partial pressure of carbon dioxide in bariatric surgery patients? * Does PRVC mode reduce intracranial pressure and partial pressure of carbon dioxide in bariatric surgery patients? * Whether intracranial pressure can be quickly measured by monitoring a patient's optic nerve sheath diameter (ONSD)？ Researchers randomized bariatric surgery patients into PC, VC, and PRVC groups for comparison, looking at breathing mechanics, PaCO2, and ICP. Participants will: * take PC mode ventilation, VC mode ventilation, and PRVC mode ventilation * monitor Respiratory mechanics, PaCO2, and ONSD