Difficult airway
Conditions
Interventions
Gold Standard:The structures found in the initial laryngoscopy were classified according to the CL grade, and no extralarynx operations were performed.
Index test:the 
Score 
and 
Bite 
Sponsors
Qilu Hospital of Shandong University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Those included were adult patients classified as American Society of Anaesthesiologists (ASA) grade I-III planned for elective surgeries under general anaesthesia requiring endotracheal intubation whose age is between 18 and 75 old years.
Exclusion criteria
Exclusion criteria: 1. Restricted mouth opening, history of burns or airway damage, inability to stand or sit upright, edentulous, neck or face mass, limited neck mobility (eg, rheumatoid arthritis and cervical disc disease), pregnancy, stomach Patients with esophageal reflux disease, morbid obesity, inadequate fasting, or those requiring rapid sequential induction; 2. Patients requiring intubation methods other than conventional laryngoscopy, such as fiberoptic laryngoscope intubation and emergency surgery.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| the Modified Mallampati Score;Upper Lip Bite Test;Direct laryngoscopy with Cormack-Lehane grading; | — |
Countries
China
Contacts
Public ContactWang Huanliang
Qilu Hospital of Shandong University
Outcome results
None listed