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Validation and Feasibility of Noninvasive Oxygen Delivery Index Monitoring in Cardiac Surgery Patients

30 de abril de 2026 actualizado por: University of Minnesota
This study will establish the feasibility and preliminary validity of real-time oxygen delivery index (DO₂i) monitoring using noninvasive hemoglobin (SpHb, Masimo) and minimally invasive cardiac output (FloTrac, Edwards) in cardiac surgery patients.

Descripción general del estudio

Estado

Aún no reclutando

Condiciones

Intervención / Tratamiento

Tipo de estudio

De observación

Inscripción (Estimado)

150

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

  • Nombre: Sherilyn Landree
  • Número de teléfono: (612) 282-3705
  • Correo electrónico: landr184@umn.edu

Ubicaciones de estudio

  • Estados Unidos
    • Minnesota
      • Minneapolis, Minnesota, Estados Unidos, 55455
        • University of Minnesota
        • Contacto:
          • Sherilyn Landree
          • Número de teléfono: 612-282-3705
          • Correo electrónico: landr184@umn.edu

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

  • Adulto
  • Adulto Mayor

Acepta Voluntarios Saludables

No

Método de muestreo

Muestra no probabilística

Población de estudio

Adults undergoing cardiac surgery

Descripción

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

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

Cohortes e Intervenciones

Grupo / Cohorte
Intervención / Tratamiento
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:

  • SpHb, Perfusion Index, SpO₂ from Masimo Radical-7 (timestamp to HH:MM:SS)
  • FloTrac cardiac index from Edwards HemoSphere
  • ABG hemoglobin, SaO₂, PaO₂, and lactate from ABL analyzer
  • Continuous cardiac index from Swan-Ganz catheter
  • Mean arterial pressure, heart rate and rhythm
  • Patient temperature from the bladder
  • Pressor requirements
Dispositivo: SpHb monitor
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.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Agreement Between SpHb-Based and Pulmonary Artery Catheter Oxygen Delivery Index
Periodo de tiempo: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post-protamine
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%.
Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post-protamine

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Directional Agreement for Changes in Oxygen Delivery Index
Periodo de tiempo: Changes between consecutive intraoperative timepoints (baseline to post-heparin, post- heparin to post-protamine) during cardiac surgery
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.
Changes between consecutive intraoperative timepoints (baseline to post-heparin, post- heparin to post-protamine) during cardiac surgery
Correlation Between Oxygen Delivery Index and Arterial Lactate
Periodo de tiempo: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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.
Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
Agreement Between FloTrac and Swan-Ganz Cardiac Index
Periodo de tiempo: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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%.
Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
Impact of Baseline SpHb Calibration on Agreement
Periodo de tiempo: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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.
Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
SpHb Signal Usability Rate
Periodo de tiempo: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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.
Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
Perfusion Index Threshold for Acceptable SpHb Accuracy
Periodo de tiempo: Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine
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.
Three intraoperative timepoints during cardiac surgery: baseline, post-heparin, and post- protamine

Otras medidas de resultado

Medida de resultado
Medida Descripción
Periodo de tiempo
Major Adverse Cardiac Events (Exploratory)
Periodo de tiempo: Within 30 days of surgery
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.
Within 30 days of surgery
Acute Kidney Injury (Exploratory)
Periodo de tiempo: Within 30 days of surgery
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).
Within 30 days of surgery

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

University of Minnesota

Investigadores

  • Investigador principal: Benjamin Gorbaty, MD, University of Minnesota

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Estimado)

1 de julio de 2026

Finalización primaria (Estimado)

1 de agosto de 2027

Finalización del estudio (Estimado)

1 de agosto de 2027

Fechas de registro del estudio

Enviado por primera vez

30 de abril de 2026

Primero enviado que cumplió con los criterios de control de calidad

30 de abril de 2026

Publicado por primera vez (Actual)

7 de mayo de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

7 de mayo de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

30 de abril de 2026

Última verificación

1 de abril de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • ANES-2026-34768

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

Sí

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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