Photoplethysmography Detects Changes in Vascular Tone

Hospital Privado de Comunidad de Mar del Plata

Status: Completed

Conditions: Vascular Diseases

Study type: Observational

Funder types: Other

Identifiers

NCT02854852

359/16

Details and patient eligibility

About

Changes in the vascular tone of anesthetized patients is common and cause hemodynamic problems. The monitoring of such changes in vascular resistance using simple and non-invasive tools is lacking. The present study was designed to determine if photoplethysmography can detect changes in the systemic vascular resistance using Doppler as the reference method.

Full description

This is a prospective and observational study designed to test the reliability of photoplethysmography to diagnose changes in the vascular resistance during anesthesia. The investigators will studied 50 mechanically ventilated patients undergoing general anesthesia. Photoplethysmography will be continuously recorded in the right thumb during anesthesia. Duplex color and power Doppler will measure flow in the radial artery of the right hand.The contour analysis of both, photoplethysmogram and radial artery flow will be analyzed, correlated and compared using the Bland-Altman plot.

Enrollment: 50 patients

Sex: All

Ages: 20 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Written Inform Consent
• Programmed surgery
• Supine position

Exclusion criteria

• Emergency surgery
• Peripheral vascular diseases

Trial design

50 participants in 1 patient group

Patients undergoing general anesthesia

Description:

Patients ASA 1-3, undergoing different types of general anesthesia, in supine position, with standard or advanced hemodynamic monitoring.