Investigation of the usefulness of oxygen extraction rate (O2ER) that can be obtained non-invasively and continuously

JRCT ID: jRCT1022220020

Registered date:14/09/2022

Basic Information

• Recruitment status: Suspended
• Health condition(s) or Problem(s) studied: patients who recieved cardiovascular surgery
• Date of first enrollment: 14/09/2022
• Target sample size: 30
• Study type: Observational

Outcome(s)

• Primary Outcome: Analyze the relationship between O2ERmi and O2ERstd using scatter plots, correlation analysis, and Bland-Altman plots
• Secondary Outcome: Analyze O2ERmi follow-up to changes in O2ERst by using four-quadrant plot analysis and polar plots analyze

Key inclusion & exclusion criteria

• Age minimum: >= 18age old
• Age maximum: Not applicable
• Gender: Both

Include criteria

Thirty adult patients who are scheduled to undergo general anesthesia under tracheal intubation at our hospital and who meet all of the following criteria:
1) an arterial catheter is inserted in the upper extremity
2) a pulmonary artery catheter is inserted
3) Written informed consent to participate in research before surgery
Therefore, the target patients are expected to be mainly those undergoing cardiovascular surgery.

Exclude criteria

Exclude patients and timings that meet any of the following:
1. Timing when using extracorporeal circulation
2. Patients with an arteriovenous shunt
3. Patients with severe respiratory disease
4. Patients with severe acid-base imbalance, timing
5. Patients who cannot wear the SpHb sensor due to finger deformation or low perfusion, timing when SpHb cannot be obtained
6. Within 10 minutes after changing ventilator settings
7. Body temperature outside the range of from 35 to 38 degrees Celsius

Related Information

• Primary Sponsor: Yoshida Keisuke