Integrated Pulmonary Index Monitoring on the Incidence of Hypoxemia in Elderly Patients With Painless Colonoscopy

The purpose of this clinical trial is to integrated pulmonary index to see if there is an effect on the incidence of hypoxemia during painless colonoscopy in older patients. Does composite pulmonary index monitoring reduce the incidence of hypoxemia? Is there a relationship between the value of the integrated pulmonary index and the patient's pulse oximetry? Continuous monitoring of the integrated pulmonary index in the experimental group was compared with the control group (no detection of the composite lung index) to see if continuous monitoring of the composite pulmonary index could reduce the incidence of hypoxemia in elderly patients. Participants will: Oxygen is provided through the nasal cannula, and respiratory parameters (end-tidal carbon dioxide partial pressure (PetCO2), pulse rate \[PR\], oxygen saturation (SpO2), and respiratory rate (RR) are obtained. The monitor calculates a integrated pulmonary index value (1-10) through mathematical operations.Different measures are taken according to different composite lung indexes, such as when the IPI is ≤6, the patient's jaw is immediately lifted, the oxygen flow rate increases to 6L·min-1, and if the SpO2 continues to decrease by \<90%, the anesthesia mask is pressurized and ventilated. Record their vital signs.