Study of Cardiac Power Index During Supine, Lateral, and Between Left and Right Positions During Two- and One-Lung Ventilation (OLV): Comparison of Hemodynamic Changes After Lung Recruitment Maneuver and Fluid Challenge Among Responders and Non-Responders (SVI, MAP, CPI Changes).
NCT ID: NCT07037225
Last Updated: 2025-06-25
Study Results
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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ACTIVE_NOT_RECRUITING
NA
60 participants
INTERVENTIONAL
2025-05-06
2027-05-06
Brief Summary
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A secondary goal is to compare the changes in hemodynamic parameters after a lung recruitment maneuver during one lung ventilation and a fluid challenge test among patients that respond (responders) or do not respond to fluids (non-responders) according to changes of Stroke Volume Index (SVI) and Mean Arterial Pressure (MAP).
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Detailed Description
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All measurements are performed with the chest closed, prior to surgical incision. Patients will be placed under general anesthesia with thoracic epidural support, and continuous hemodynamic monitoring will be established via a radial artery catheter connected to a HemoSphere monitor (Edwards Lifesciences). Key parameters monitored include CPI, cardiac index (CI), heart rate (HR), stroke volume index (SVI), and MAP.
Hemodynamic data will be collected at various predefined timepoints:
1. Baseline in the supine position under 2LV
2. Lateral position under OLV
3. Before and after a recruitment maneuver
4. Before and after a standardized fluid challenge
The recruitment maneuver consists of continuous positive airway pressure at 30 cmH₂O for 30 seconds. The fluid challenge involves administering 250 mL of isotonic saline over 10 minutes. Hemodynamic responses will be used to classify patients as fluid responders or non-responders based on ≥10% changes in SV and/or MAP.
Data analysis will focus on comparing CPI trends across positions and ventilation modes, as well as evaluating the utility of CPI in predicting fluid responsiveness. Hemodynamic parameters will be collected digitally and analyzed for intraoperative trends.
Conditions
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Study Design
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NON_RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Right Lateral Decubitus Position Group
Cardiac Power Index (CPI) baseline will be measured before induction of general anesthesia, then in the supine position during two-lung ventilation (2LV), and in the right lateral decubitus position during one-lung ventilation (OLV). Measurements will be compared across different positions within the same patient. Hemodynamic monitoring will be performed using the HemoSphere device. During OLV, a lung recruitment maneuver will be performed, followed by a fluid challenge using 250 mL of normal saline (0.9% NaCl). Hemodynamic parameters (CPI, Cardiac Index, Stroke Volume Index, and Mean Arterial Pressure) will be recorded at 2 and 5 minutes post-infusion. Patients will be classified as responders (SVI and MAP increase ≥10%) or non-responders. Changes in CPI will also be monitored.
Fluid challenge during one-lung ventilation (OLV) in the lateral decubitus position
During OLV, a lung recruitment maneuver will be performed, followed by measurements of CPI, CI, SVI, and MAP. A fluid challenge using 250 mL of normal saline (0.9% NaCl) will be administered. Hemodynamic parameters will be recorded at 2 and 5 minutes post-infusion. Patients will be classified as responders (SVI and MAP increase ≥10%) or non-responders. Changes in CPI will also be recorded accordingly.
Hemodynamic monitoring
Invasive hemodynamic monitoring will be performed using the HemoSphere device (Edwards Lifesciences).
Left Lateral Decubitus Position Group
Cardiac Power Index (CPI) baseline will be measured before induction of general anesthesia, then in the supine position during two-lung ventilation (2LV), and in the left lateral decubitus position during one-lung ventilation (OLV). Measurements will be compared across different positions within the same patient. Hemodynamic monitoring will be performed using the HemoSphere device. During OLV, a lung recruitment maneuver will be performed, followed by a fluid challenge using 250 mL of normal saline (0.9% NaCl). Hemodynamic parameters (CPI, Cardiac Index, Stroke Volume Index, and Mean Arterial Pressure) will be recorded at 2 and 5 minutes post-infusion. Patients will be classified as responders (SVI and MAP increase ≥10%) or non-responders. Changes in CPI will also be monitored.
Fluid challenge during one-lung ventilation (OLV) in the lateral decubitus position
During OLV, a lung recruitment maneuver will be performed, followed by measurements of CPI, CI, SVI, and MAP. A fluid challenge using 250 mL of normal saline (0.9% NaCl) will be administered. Hemodynamic parameters will be recorded at 2 and 5 minutes post-infusion. Patients will be classified as responders (SVI and MAP increase ≥10%) or non-responders. Changes in CPI will also be recorded accordingly.
Hemodynamic monitoring
Invasive hemodynamic monitoring will be performed using the HemoSphere device (Edwards Lifesciences).
Interventions
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Fluid challenge during one-lung ventilation (OLV) in the lateral decubitus position
During OLV, a lung recruitment maneuver will be performed, followed by measurements of CPI, CI, SVI, and MAP. A fluid challenge using 250 mL of normal saline (0.9% NaCl) will be administered. Hemodynamic parameters will be recorded at 2 and 5 minutes post-infusion. Patients will be classified as responders (SVI and MAP increase ≥10%) or non-responders. Changes in CPI will also be recorded accordingly.
Hemodynamic monitoring
Invasive hemodynamic monitoring will be performed using the HemoSphere device (Edwards Lifesciences).
Eligibility Criteria
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Inclusion Criteria
* Physical status ASA I-III (per the American Society of Anesthesiologists)
* Fluent in Greek or English
* Scheduled for thoracic surgery using a double-lumen endotracheal tube
Exclusion Criteria
* Severe valvular disease
* Severe right or left ventricular dysfunction
* Morbid obesity (BMI ≥ 40 kg/m²)
* Inability to perform spirometry and/or echocardiography
* Patient refusal to participate
18 Years
ALL
Yes
Sponsors
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Maria Fountoulaki
OTHER
Responsible Party
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Maria Fountoulaki
Medical Doctor, Anesthesiology Resident
Locations
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Attikon Hospital
Athens, Chaidari, Greece
Countries
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References
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Abdullah T, Gokduman HC, Eniste IA, Atasever AG, Ali A, Gumus Ozcan F. Novel parameters for predicting fluid responsiveness during the mini fluid challenge and ability of the cardiac power index: an observational cohort study. Turk J Med Sci. 2023 Aug 26;53(5):1224-1233. doi: 10.55730/1300-0144.5688. eCollection 2023.
Fujita M, Miyamoto S, Sekiguchi H, Eiho S, Sasayama S. Effects of posture on sympathetic nervous modulation in patients with chronic heart failure. Lancet. 2000 Nov 25;356(9244):1822-3. doi: 10.1016/S0140-6736(00)03240-2.
Jiang JS, Kor CT, Kuo DD, Lin CH, Chang CC, Chen GY, Kuo CD. Residual heart rate variability measures can better differentiate patients with acute myocardial infarction from patients with patent coronary artery. Ther Clin Risk Manag. 2018 Oct 8;14:1923-1931. doi: 10.2147/TCRM.S178734. eCollection 2018.
Kimura A, Suehiro K, Juri T, Fujimoto Y, Yoshida H, Tanaka K, Mori T, Nishikawa K. Hemodynamic Changes via the Lung Recruitment Maneuver Can Predict Fluid Responsiveness in Stroke Volume and Arterial Pressure During One-Lung Ventilation. Anesth Analg. 2021 Jul 1;133(1):44-52. doi: 10.1213/ANE.0000000000005375.
Nisi F, Giustiniano E, Meco M, Pugliese L, Calabro L, Spano S, Ripani U, Cecconi M. The Cardiac Power Index during Abdominal Open Aortic Surgery: Intraoperative Insights into the Cardiac Performance-A Retrospective Observational Analysis. J Pers Med. 2022 Oct 12;12(10):1705. doi: 10.3390/jpm12101705.
Min JY, Jeon JP, Chung MY, Kim CJ. Use of the cardiac power index to predict fluid responsiveness in the prone position: a proof-of-concept study. Braz J Anesthesiol. 2024 Nov-Dec;74(6):844545. doi: 10.1016/j.bjane.2024.844545. Epub 2024 Aug 6.
Liu T, He P, Hu J, Wang Y, Shen Y, Peng Z, Sun Y. The Hemodynamic Changes Induced by Lung Recruitment Maneuver to Predict Fluid Responsiveness in Children during One Lung Ventilation-A Prospective Observational Study. Children (Basel). 2024 May 27;11(6):649. doi: 10.3390/children11060649.
Zhang Y, Ding Y, Zhang J, Huang T, Gao J. Tidal volume challenge-induced hemodynamic changes can predict fluid responsiveness during one-lung ventilation: an observational study. Front Med (Lausanne). 2023 Aug 9;10:1169912. doi: 10.3389/fmed.2023.1169912. eCollection 2023.
Miyamoto S, Tambara K, Tamaki Si, Nagaya N, Hasegawa K, Nohara R, Miwa K, Fujita M. Effects of right lateral decubitus position on plasma norepinephrine and plasma atrial natriuretic peptide levels in patients with chronic congestive heart failure. Am J Cardiol. 2002 Jan 15;89(2):240-2. doi: 10.1016/s0002-9149(01)02212-3. No abstract available.
Provided Documents
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Document Type: Study Protocol and Statistical Analysis Plan
Document Type: Informed Consent Form
Related Links
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Physiology of the Lateral Decubitus Position, Open Chest, and One-Lung Ventilation
Evidence-based thoracic epidural nerve block: A systematic review
Other Identifiers
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36032
Identifier Type: -
Identifier Source: org_study_id
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