Validation and Feasibility of Noninvasive Oxygen Delivery Index Monitoring in Cardiac Surgery Patients
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Sherilyn Landree
- Telefonnummer: (612) 282-3705
- E-Mail: landr184@umn.edu
Studienorte
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Minnesota
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Minneapolis, Minnesota, Vereinigte Staaten, 55455
- University of Minnesota
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Kontakt:
- Sherilyn Landree
- Telefonnummer: 612-282-3705
- E-Mail: landr184@umn.edu
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- Adults ≥ 18 years undergoing cardiac surgery
- Placement of pulmonary artery catheter with continuous cardiac output (CCO) as part of routine clinical care
- Placement of arterial line with FloTrac as part of routine clinical care
- Availability of ≥ 3 arterial blood gas samples at specified timepoints
Exclusion Criteria:
- Mechanical circulatory support planned or in use (IABP, Impella, ECMO)
- Patients without BOTH pulmonary artery catheter with CCO and arterial line with FloTrac
- Patients who are Research Opt-Out
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
Anzahl der Gruppen / Kohorten
Kohorten und Interventionen
Gruppe / KohorteGruppe / Kohorte |
Intervention / BehandlungIntervention / Behandlung |
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Cardiac surgery patients
The study uses a within-patient repeated-measures design, where each patient serves as their own control across the three timepoints. The following measures will be recorded:
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The SpHb monitor is an FDA approved device being used according to its approved indications.
No additional invasive procedures, blood draws, or interventions are performed for research purposes.
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Agreement Between SpHb-Based and Pulmonary Artery Catheter Oxygen Delivery Index
Zeitfenster: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post-protamine
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Bias and 95% limits of agreement between monitor-derived DO₂i (calculated from continuous SpHb and FloTrac cardiac index) and pulmonary artery catheter DO₂i (calculated from arterial blood gas hemoglobin and Swan-Ganz cardiac index), analyzed using Bland-Altman method with mixed-effects modeling to account for repeated measures.
Agreement is considered acceptable if percentage error is <30%.
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Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post-protamine
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Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Directional Agreement for Changes in Oxygen Delivery Index
Zeitfenster: Changes between consecutive intraoperative timepoints (baseline to post-heparin, post- heparin to post-protamine) during cardiac surgery
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Four-quadrant concordance rate (with 15% exclusion zone) for directional changes in DO₂i between consecutive timepoints.
Concordance is defined as agreement in direction of change (increase vs decrease) between monitor-derived and gold-standard DO₂i measurements.
Scores range from 0- 100%, with higher percentages indicating better directional agreement.
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Changes between consecutive intraoperative timepoints (baseline to post-heparin, post- heparin to post-protamine) during cardiac surgery
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Correlation Between Oxygen Delivery Index and Arterial Lactate
Zeitfenster: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Pearson or Spearman correlation coefficient between DO₂i (both monitor-derived and gold- standard) and simultaneously measured arterial lactate concentration.
Correlation coefficients range from -1 to +1, with negative values indicating inverse relationship between DO₂i and lactate.
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Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Agreement Between FloTrac and Swan-Ganz Cardiac Index
Zeitfenster: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Percentage error between FloTrac arterial pressure-based cardiac index and Swan-Ganz thermodilution continuous cardiac index.
Percentage error is calculated as (1.96 × SD of differences) / mean cardiac index × 100%.
Agreement is considered acceptable if percentage error is <30%.
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Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Impact of Baseline SpHb Calibration on Agreement
Zeitfenster: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Comparison of limits of agreement before and after in vivo SpHb calibration (baseline- adjusted SpHb using first arterial blood gas hemoglobin value as reference).
Measured as change in bias and 95% limits of agreement between uncalibrated and baseline-calibrated SpHb-based DO₂i compared to gold standard.
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Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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SpHb Signal Usability Rate
Zeitfenster: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Percentage of planned timepoints with valid SpHb signal defined by perfusion index (PI) ≥ 0.5.
Scores range from 0-100%, with 100% indicating valid signal at all timepoints.
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Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Perfusion Index Threshold for Acceptable SpHb Accuracy
Zeitfenster: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Minimum perfusion index value associated with acceptable SpHb accuracy, defined as SpHb bias within ±1 g/dL of arterial blood gas hemoglobin.
Perfusion index values range from 0-20%, with higher values indicating better peripheral perfusion.
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Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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Andere Ergebnismessungen
Andere Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Major Adverse Cardiac Events (Exploratory)
Zeitfenster: Within 30 days of surgery
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Composite endpoint including all-cause mortality, myocardial infarction (elevated troponin with ECG changes or clinical symptoms), stroke (new neurologic deficit with imaging confirmation), or urgent revascularization.
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Within 30 days of surgery
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Acute Kidney Injury (Exploratory)
Zeitfenster: Within 30 days of surgery
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AKI defined and staged using KDIGO criteria based on postoperative serum creatinine changes: Stage 1 (1.5-1.9×
baseline or ≥0.3 mg/dL increase), Stage 2 (2.0-2.9×
baseline), Stage 3 (≥3× baseline or ≥4.0 mg/dL or initiation of renal replacement therapy).
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Within 30 days of surgery
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Benjamin Gorbaty, MD, University of Minnesota
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- ANES-2026-34768
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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