The purpose of this study is to investigate the incidence of respiratory complications after gastroenteroscopy, and establish a Logistic regression model to analyze the related risk factors of respiratory complications.

Gastrointestinal endoscopy is currently the most widely used and reliable technique for diagnosing digestive tract diseases.With the increasing need for pain relief and the improvement of anesthesiology technology, more and more patients prefer to undergo gastroenteroscopy under sedation or anesthesia.The painless technique of gastroenteroscopy is an anesthetic method , and like other anesthesia techniques, it brings risks as well as comfort.However, current studies mainly focus on respiratory and circulation-related adverse events during the examination , while little attention is paid to delayed respiratory complications after examination.

Inclusion Criteria:

1. Age ≥18 years old;
2. Qualified gastrointestinal tract preparation in strict accordance with the preparation requirements related to gastroenteroscopy;

Exclusion Criteria:

1. Patients with respiratory system symptoms or history before surgery;
2. Patients in need of a tracheal intubation;
3. Refuse follow-up;

Population undergoing gastrointestinal endoscopy examination at Qingdao University Affiliated Hospital from December 2024 to February 2025.