Comparison of a Polyvinyl Chloride Tube With a Wire-reinforced Tube for Tracheal Intubation Through the SaCoVLM

Comparison of a Polyvinyl Chloride Tube With a Wire-reinforced Tube for Tracheal Intubation Through the SaCoVLM Video Laryngeal Mask Airway: a Randomized Controlled Study

To compare a polyvinyl chloride tube with a wire-reinforced tube for tracheal intubation through the SaCoVLM video laryngeal mask airway, to observe the success rate of intubation and the incidence of postoperative adverse reactions, and to explore the best type of endotracheal tube through the SaCoVLM video laryngeal mask airway, so as to provide reference for its clinical application.

1. At present, there are few studies on intubation through SaCoVLM video laryngeal mask airway. It is proposed that endotracheal intubation through SaCoVLM video laryngeal mask airway is to verify its feasibility.
2. The purpose is to explore the best type of endotracheal tube by observing the success rate of intubation through SaCoVLM video laryngeal mask airway and the incidence of postoperative adverse reactions.
3. By observing the hemodynamic changes of the polyvinyl chloride tubes and the wire-reinforced tube during intubation through SaCoVLM video laryngeal mask airway , the effects of the two tracheal tubes on the hemodynamics of patients were compared.
4. By observing the optimized operation which can improve the success rate of tracheal intubation in the experiment, it can be better applied in clinical practice.

Inclusion Criteria:

1. Scheduled to accept elective laparoscopic surgery under general anaesthesia.
2. Aged 18-70 years.
3. Body mass index (BMI) 18.5-27.9 kg/m2.
4. ASA class I-III.

Exclusion Criteria:

1. Neurological or psychiatric diseases (such as schizophrenia and depression), or unconscious.
2. Severe cardiopulmonary dysfunction.
3. Vocal cord injury, pharyngeal disease or history of neck surgery.
4. Risk of reflux aspiration and indwelling nasogastric tube before and after surgery.
5. Mouth opening less than 2 cm, limitation of cervical extension, modified Mallampati score IV.
6. SaCoVLM glottic exposure grade 3 or 4.
7. Participated in other clinical studies during the last 3 months.
8. Refused to give informed consent for the clinical study.