The Effect of Tracheal Intubation on AC and DC Components of a Photoplethysmograph

University of California San Francisco (UCSF)

Status: Completed

Conditions: Anesthesia Intubation Complication

Treatments: Procedure: endotracheal intubation

Study type: Observational

Funder types: Other

Identifiers

NCT03032939

PT071

Details and patient eligibility

About

Intraoperative stress responses (vasoconstriction and changes in heart rate) and postoperative pain can be monitored using photoplethysmography (PPG). PPG measures changes in tissue volume noninvasively. Therefore it can measure acute changes in arterial diameter (vasoconstriction). PPG signal has two components, AC and DC. Effects of noxious stimuli-induced stress responses (vasoconstriction) have not been studied on the DC component of PPG. The aim of this study was to investigate the effect of a known noxious stimulus (endotracheal intubation) on both the AC and DC components of PPG.

Enrollment: 35 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Elective surgery
• General endotracheal anesthesia
• Over 18 years of age
• Healthy

Exclusion criteria

• Vascular disease
• Liver or kidney disease
• Overweight