Perioperative Outcomes With Laryngeal Mask Airway and Endotracheal Tube in Pediatric Laparoscopic Appendectomy: A Prospective Observational Cohort Study
This prospective observational cohort study of 64 pediatric patients undergoing laparoscopic appendectomy demonstrates that a laryngeal mask airway (LMA) provides effective ventilation comparable to an endotracheal tube (ETT) with similar surgical outcomes but significantly lower peak airway pressures, suggesting it is a viable alternative for selected cases.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
When a child needs surgery to remove an inflamed appendix, the medical team must first ensure the child can breathe safely while they are asleep. This is a critical moment in pediatric anesthesia. For decades, the standard way to secure a child's airway during abdominal surgery has been to insert a breathing tube directly into the windpipe. This tube, known as an endotracheal tube, acts as a rigid conduit for air, but it requires the use of powerful muscle-relaxing drugs to keep the child's throat open and still. In recent years, doctors have begun to consider a different tool: a soft, inflatable mask that sits just above the voice box. This device, called a laryngeal mask, does not enter the windpipe and often allows doctors to avoid using those strong muscle relaxants. The question facing surgeons and anesthesiologists is whether this softer approach can work just as well when the abdomen is filled with gas to create space for the operation, a technique known as laparoscopy. If the mask can handle the pressure changes inside the belly without letting air escape or causing the child to struggle, it could offer a gentler, safer path for recovery.
A team of researchers at Ankara University set out to test this idea directly. They followed 64 children, aged between two and eighteen, who were scheduled for laparoscopic appendectomy. The study was observational, meaning the doctors chose the breathing method based on their usual clinical judgment rather than assigning it randomly. Thirty-two children received the traditional breathing tube, while the other thirty-two were managed with the laryngeal mask. Crucially, the children with the mask did not receive the muscle-relaxing drugs that were given to the group with the breathing tubes. Before the surgery began, the medical team carefully ensured that every child had followed strict fasting rules to empty their stomachs, and they placed a thin tube through the nose into the stomach to drain any remaining contents, a safety step to prevent vomiting or aspiration during the procedure.
As the operations proceeded, the researchers watched closely at specific moments: when the child first went to sleep, when the breathing device was placed, and when the carbon dioxide gas was pumped into the abdomen to lift the abdominal wall for the surgeon. They measured how hard the ventilator had to push to deliver air, known as peak airway pressure, along with heart rate, blood pressure, and oxygen levels. The results showed a clear difference in how the airways responded. The children with the traditional breathing tube consistently required higher pressure to push air into their lungs. In contrast, the group with the laryngeal mask breathed with significantly lower airway pressures throughout the entire surgery. This was true both before the gas was introduced and while the abdomen was inflated. Despite this difference in pressure, the children in both groups maintained stable oxygen levels and carbon dioxide removal, indicating that the laryngeal mask was just as effective at keeping the lungs working properly.
The study also looked at how the surgery itself went and how the children felt afterward. The surgeons reported that the view inside the abdomen was excellent in both groups, and they were equally satisfied with the conditions for performing the operation, even though the children with the mask had not been given muscle relaxants. When the surgery ended, the children were monitored for common issues like coughing, sore throat, or nausea. The group with the breathing tube experienced coughing more frequently, while no child in the laryngeal mask group coughed or developed a sore throat. There were no instances of serious complications like the airway closing up or stomach contents entering the lungs in either group. The time it took for the children to wake up and leave the recovery room was similar for both groups, suggesting that avoiding the muscle relaxants did not delay their return to consciousness.
These findings suggest that for carefully selected children undergoing this specific type of surgery, the laryngeal mask is a viable and effective alternative to the traditional breathing tube. It provides the same quality of ventilation and surgical conditions but does so with lower airway pressures and fewer minor irritations like coughing upon waking. The researchers noted that this approach works best when the child has fasted properly and does not have a perforated appendix or other risk factors that might increase the chance of stomach contents coming back up. While the study was not a randomized trial and the doctors made the initial choice of device based on their assessment, the data indicates that the laryngeal mask can offer a gentler option for airway management in pediatric laparoscopic appendectomy, potentially reducing the need for muscle-relaxing drugs and improving the comfort of the recovery period.
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