Intubation Blades for C-Section

(ANGLED Trial)

This trial aims to determine which type of video laryngoscope blade is more effective for intubating pregnant patients during a C-section under general anesthesia. A video laryngoscope assists doctors in placing a breathing tube. The trial compares two blade types: the Macintosh style with a gentle curve and the hyperangulated with a sharper curve. As a feasibility study, it assesses whether enough participants will join and if the study methods function effectively. Pregnant patients requiring an emergency or urgent C-section with a breathing tube are suitable candidates. As an unphased trial, this study allows participants to contribute to the improvement of medical procedures for future patients.

Research has shown that both hyperangulated and Macintosh-style blades have been safely used in medical settings for about 20 years. One study suggested that hyperangulated blades can ease intubation by reducing the number of attempts needed, thereby lowering the risk of complications. Another study found that these blades might also help prevent breathing problems in certain situations, leading to fewer negative outcomes.

For the Macintosh-style blade, research indicates it is effective and quick for intubation in many cases. Its widespread use in emergency and anesthesia care supports its safety and reliability.

Researchers are excited about this trial because it explores two different intubation blade styles used during C-sections, which could improve safety and efficiency. The Hyperangulated blade offers a unique angle that may provide better visibility and easier access to the airway, potentially reducing intubation complications. On the other hand, the Macintosh style blade is a widely used standard that serves as a benchmark for comparison. By investigating these two methods, researchers hope to identify which blade offers the safest and most effective option for intubating patients undergoing C-sections.

This trial will compare hyperangulated blades and Macintosh-style blades for intubation during cesarean sections. Studies have shown that both blade types effectively assist breathing during cesarean sections under general anesthesia. Research indicates that the hyperangulated blade achieves a high success rate on the first attempt, with one study showing a 96.2% success rate, and often requires fewer attempts. The Macintosh-style blade, widely used and effective in many situations, may not perform as well in some cases. Both blades have been used safely for many years, and evidence supports their effectiveness for breathing assistance during surgeries like cesarean deliveries.⁶⁷⁸⁹¹⁰