Algorithm Predicting Intraoperative Changes in Cardiac Output Using Capnography

NCT ID: NCT07061548

Last Updated: 2025-07-18

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

2005 participants

Study Classification

OBSERVATIONAL

Study Start Date

2025-07-03

Study Completion Date

2025-12-31

Brief Summary

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Conventional monitoring of cardiac output requires an invasive procedure and an additional device, which can lead to increased risk and cost. Investigators developed an artificial intelligence algorithm to predict intraoperative changes in cardiac output using capnography in patients undergoing surgery under general anesthesia.

Detailed Description

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Anesthesiologists strive to maintain adequate cardiac output during surgery. However, conventional monitoring of cardiac output requires an invasive procedure (risk) and an additional device (cost).

Because most surgeries are performed without any invasive monitors, anesthesiologists must manage the patients without cardiac output information.

However, modern anesthesia machines usually provide capnography, and continuous capnography monitoring can help estimate changes in cardiac output. Therefore, investigators aim to develop an artificial intelligence algorithm to predict intraoperative changes in cardiac output using capnography in patients undergoing surgery under general anesthesia.

Investigators train a model using capnography data (5-minute duration) related to a 20% or greater decrease in cardiac output during the same period. The developed model can provide an alarm for a decrease in cardiac output based on the change in capnography.

Conditions

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General Anesthesia Using Endotracheal Intubation

Study Design

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Observational Model Type

COHORT

Study Time Perspective

RETROSPECTIVE

Study Groups

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capnography-cardiac output cohort

Adult patients who underwent surgery under general anesthesia with capnography and invasive arterial blood pressure monitor

No Intervention: Observational Cohort

Intervention Type OTHER

No intervention

Interventions

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No Intervention: Observational Cohort

No intervention

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Elective surgery under general anesthesia
* Adult patients (18 \< age \< 76)
* Patients who were monitored invasive arterial blood pressure (waveform) and capnography (numeric)

Exclusion Criteria

* Emergency surgery
* Cardiovascular and thoracic surgery
* Known Asthma and Chronic obstructive pulmonary disease (COPD)
* Preoperative pulmonary function test (PFT) abnormality over moderate grade
* Intraoperative monitoring duration less than 30 minutes
Minimum Eligible Age

19 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Samsung Medical Center

OTHER

Sponsor Role lead

Responsible Party

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Heejoon Jeong

Clinical Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Samsung Medical Center

Seoul, , South Korea

Site Status RECRUITING

Countries

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South Korea

Central Contacts

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Heejoon Jeong, MD

Role: CONTACT

+82-2-3410-0841

Facility Contacts

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Heejoon Jeong, MD

Role: primary

+82-2-3410-0841

Other Identifiers

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SMC2025-06-120-001

Identifier Type: -

Identifier Source: org_study_id

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