Clinical trials

The purpose of this study is to find out whether high-flow tracheal oxygen (HFTO) delivered at flows greater than 60 L/min can increase end-expiratory lung volume (EELV) in intubated patients during a spontaneous breathing trial (SBT). Weaning from mechanical ventilation can be difficult, especially in patients at higher risk of failure. During an SBT, losing positive end-expiratory pressure (PEEP) can cause the lungs to lose volume and make breathing harder by increasing the work of breathing (WOB). HFTO may help reduce the work of breathing, but previous studies using flows of 30-60 L/min did not consistently show an increase in EELV. Higher flows may create more airway pressure. Therefore, the main question this study is trying to answer is: In intubated patients during an SBT, does HFTO at flows greater than 60 L/min increase EELV? The hypothesis is that HFTO at flows above 60 L/min will increase EELV during the SBT.

The goal of this clinical trial is to learn if a new method for managing breathing tube pressure is better at preventing fluid from leaking into patients' lungs during surgery. It will also check if it causes fewer side effects like a sore throat. The main questions it aims to answer are: Does using a continuous pressure controller reduce fluid leakage past the breathing tube cuff compared to the standard manual method? Does the continuous pressure controller lead to fewer and less severe sore throats and voice changes after surgery? Researchers will compare two groups: Group 1: Patients whose breathing tube cuff pressure is managed with a continuous automatic controller. Group 2: Patients whose breathing tube cuff pressure is managed with the standard manual method. Participants will: Be randomly assigned to one of the two groups before their surgery. Receive a small, safe amount of blue dye in their mouth during the procedure to help measure leakage. Have two small secretion samples collected from their breathing tube during surgery. Be asked about sore throat and voice changes at 1, 2, 3, and 24 hours after the breathing tube is removed.