Efficacy of WEI NASAL JET for supraglottic ventilation before tracheal intubation in patients with tooth loss

Abstract

Objective To evaluate the efficacy of WEI NASAL JET for supraglottic ventilation before tracheal intubation in the patients with tooth loss. Methods Sixty patients of both sexes with tooth loss (more than 8 teeth missing), aged 67-83 yr, of American Society of Anesthesiologists physical statusⅠ-Ⅲ, with Mallampati classificationⅠ-Ⅲ, with body mass index of 18-25 kg/m2, undergoing surgery with general anesthesia, were divided into 2 groups (n=30 each) using a random number table method: WEI NASAL JET group (S group) and mask group (M group). After the end of anesthesia induction, WEI NASAL JET was inserted via the nasal cavity to perform supraglottic ventilation in group S, and two-hand buckle mask was performed in group M, and the patients were tracheally intubated after 5-min ventilation.At 5-min spontaneous breathing after nitrogen removal by oxygen supply, 1, 2, 3 and 4 min after no spontaneous breathing and immediately after intubation (T5), ultrasound was used to measure the amplitude of diaphragm motion induced by respiratory movement, and blood gas analysis was performed to record the development of pH value<7.30, SpO2<90% and fluctuation in mean arterial pressure and heart rate ≥30% of baseline before operation.The development of ventilation-related complications was also recorded. Results Compared with group M, the amplitude of diaphragm motion induced by respiratory movement was significantly increased at T1-5, PaO2was increased at T2-5, PaCO2 and PETCO2 were decreased at T3-5, the incidence of sore throat and nasal mucosal bleeding was increased, the incidence of gingiva injury and flatulence was decreased (P 0.05). The pH value<7.30 and SpO2<90% were not found in two groups. Conclusion WEI NASAL JET can provide satisfactory supraglottic ventilation efficacy before tracheal intubation with good safety in the patients with tooth loss. Key words: WEI NASAL JET; Teeth missing