Effect of Dynamic Arterial Elastance and Assisted Fluid Management Software Guided Resuscitation in Septic Shock: Pilot Study

Official title

Effect of Dynamic Arterial Elastance and Assisted Fluid Management Software Guided Adjustment of Vasopressor and Fluid Therapy in Septic Shock Resuscitation; A Pilot Study

Overview

To investigate the benefit of using the AFM and Eadyn-guided fluid and vasopressor therapy in septic shock resuscitation for mechanically ventilated patients compared with the standard of care. The investigators hypothesize that using the AFM and Eadyn-guided fluid/vasopressor titration in septic shock patients who underwent mechanical ventilation might reduce the time to shock reversal.

Detailed description

Hypotension in the context of an intensive care unit has been associated with a higher risk of death and multiorgan dysfunction. Vascular leakage and systemic vasodilatation are brought on by systemic inflammation from infections. These are the hallmarks of septic shock in which 90% of cases of shock are mostly distributive and hypovolemic. Early vasopressors and fluid therapy are increasingly used at the start of vasodilatory shock resuscitation since this method improves the rate of shock control within 6 hours in septic shock resuscitation. Norepinephrine is the first-line vasopressor for vasodilatory shock. However, resuscitation with an accurate amount of fluid and vasopressor is challenging in clinical practice. Fluid overload and overuse of vasopressors are prevalent and increase mortality. Together with a higher dose of norepinephrine, it may increase the risk of ischemic complications.

A new hemodynamic monitoring device (Hemosphere(R) - Edward Lifescience, California, USA) provides two novel parameters for hemodynamic monitoring: the new device with artificial intelligence developed by a retrospective cohort (used for training) and a prospective (local hospital cohort used for external validation). The feature of Hemosphere(R), including dynamic arterial elastance (Eadyn) and stroke volume change prediction (∆SVpredict) as the assist fluid management (AFM) based on arterial pressure waveform analysis by the monitoring software, was detected in arterial line waveform without any complication of a safety issue.

The ratio of pulse pressure to stroke volume (PP/SV) is defined by dynamic arterial elastance (Eadyn), the reciprocal of compliance within the range of 0.8 to 1.0 is the optimization of arterial load that can predict arterial pressure response to fluid administration and vasopressor weaning. The prediction of the stroke volume changes following the upcoming fluid therapy (∆SVpredict) uses stroke volume variation parameters and closed-loop feedback data, which should be less than 10% to indicate optimal fluid administration. Consequently, this technique offers a useful means of evaluating arterial tone related to preload responsiveness parameters predicting the hemodynamic response to increases in cardiac preload.

However, several studies show the benefit of this tool in perioperative patients, and the evidence on the benefit of using this monitoring to guide septic shock resuscitation is limited. In a previous study, Eadyn can predict a decrease in mean arterial pressure linked to a reduction in norepinephrine dosage. This study aimed to investigate the benefit of using AFM and Eadyn-guided fluid and vasopressor therapy in septic shock resuscitation compared with the standard of care

Interventions

• Device The AFM and Eadyn - guided resuscitation group
  A fluid challenge using a stroke volume change prediction (∆SVpredict) and Eadyn guide. If the ∆SVpredict is more than 10%, isotonic crystalloid of 500 ml will be administered in 30 minutes, and the machine's response will be awaited. If ∆SVpredict is still more than 10%, continuous fluid loading was reapplied until SVV was less than 10% (fluid therapy will be stopped if ∆SVpredict is less than 10%) and dynamic arterial elastance (EAdyn) reaches the goal of 0.8-1.0 along with a vasopressor will
• Other The standard care for septic shock
  The standard of care group will be treated according to according to septic shock guidelines 2021; In brief A vasopressor with optimal ideal fluid (at least 30 ml/kg) will be given to achieve the hemodynamic target (MAP ≥ 65 mm Hg) by fluid challenge technique guided by MAP and central venous pressure (CVP) changes after fluid challenge. Fluid-responsive tests can be used as a subsidiary, depending on the attending physician. Early Norepinephrine (NE) infusion can be used with a standard dose of

Primary outcome measures

• time to shock reversal [Time frame: 28 days]

Secondary outcome measures (12)

• a time-to-goal achievement for septic shock resuscitation [Time frame: 28 days]
• time to NE titrating [Time frame: 48 hours]
• maximum dose of vasopressors [Time frame: 48 hours]
• volume of fluid therapy during resuscitation [Time frame: 48 hours]
• fluid before randomization [Time frame: 48 hours]
• fluid accumulation at 24 hours [Time frame: 24 hours]
• fluid accumulation at 72 hours [Time frame: 72 hours]
• fluid accumulation at 7 days [Time frame: 7 days]
• 28-day hospital mortality [Time frame: 28 days]
• ICU length of stay [Time frame: 28 days]
• hospital length of stay [Time frame: 28 days]
• shock reversal at 6 hours [Time frame: 6 hours]

Eligibility criteria

Inclusion criteria

• All Thai consecutive patients older than 18 years with a diagnosis of sepsis or septic shock in medical ICU, defined by clinically suspected or confirmed infection and MAP <65 mmHg according to the criteria of the Surviving Sepsis Campaign 2021(11)with onset of shock in less than 24 hours.
• Already receiving or planning for mechanical ventilation
• Already receiving or planning for arterial catheter placement for invasive arterial pressure monitoring
• All patients will receive an echocardiogram with a cut point of LVEF > 30% to be included in the study

Exclusion criteria

• Active, immediate, life-threatening cardiac arrhythmia, defined as ventricular tachycardia and ventricular fibrillation
• Acute cerebral vascular event, including both acute ischemic stroke or intracranial hemorrhage
• Acute coronary syndrome
• cardiogenic shock, acute heart failure
• Severe asthma exacerbation
• Fluid intolerance: hypoxemia (P:F ratio < 150)
• Life-threatening gastrointestinal hemorrhage
• Pregnancy
• Requirement for immediate surgery within 2 hours of randomization
• Advanced-stage cancer with predicted survival of less than 6 months
• Oliguric AKI with signs of volume overload

Withdrawal or termination criteria

• The patient and legal representative request for withdrawal
• The attending physician requested a withdrawal

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

Randomized

Model

Parallel assignment

Masking

Open label

Primary purpose

Supportive care

Study locations

Thailand · 3 centers

• Faculty of Medicine Siriraj Hospital — Bangkok Noi
• Siriraj Hospital, Mahidol University — Bangkok
• Siriraj Hospital, Mahidol University — Bangkok

Publications

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• Evans L, Rhodes A, Alhazzani W, Antonelli M, Coopersmith CM, French C, Machado FR, Mcintyre L, Ostermann M, Prescott HC, Schorr C, Simpson S, Wiersinga WJ, Alshamsi F, Angus DC, Arabi Y, Azevedo L, Beale R, Beilman G, Belley-Cote E, Burry L, Cecconi M, Centofanti J, Coz Yataco A, De Waele J, Dellinger RP, Doi K, Du B, Estenssoro E, Ferrer R, Gomersall C, Hodgson C, Hylander Moller M, Iwashyna T, J PMID 34605781
• Maheshwari K, Malhotra G, Bao X, Lahsaei P, Hand WR, Fleming NW, Ramsingh D, Treggiari MM, Sessler DI, Miller TE; Assisted Fluid Management Study Team. Assisted Fluid Management Software Guidance for Intraoperative Fluid Administration. Anesthesiology. 2021 Aug 1;135(2):273-283. doi: 10.1097/ALN.0000000000003790. PMID 33901281
• Kelly RP, Ting CT, Yang TM, Liu CP, Maughan WL, Chang MS, Kass DA. Effective arterial elastance as index of arterial vascular load in humans. Circulation. 1992 Aug;86(2):513-21. doi: 10.1161/01.cir.86.2.513. PMID 1638719
• Lai CJ, Cheng YJ, Han YY, Hsiao PN, Lin PL, Chiu CT, Lee JM, Tien YW, Chien KL. Hypotension prediction index for prevention of intraoperative hypotension in patients undergoing general anesthesia: a randomized controlled trial. Perioper Med (Lond). 2024 Jun 15;13(1):57. doi: 10.1186/s13741-024-00414-7. PMID 38879506
• Dong S, Wang Q, Wang S, Zhou C, Wang H. Hypotension prediction index for the prevention of hypotension during surgery and critical care: A narrative review. Comput Biol Med. 2024 Mar;170:107995. doi: 10.1016/j.compbiomed.2024.107995. Epub 2024 Jan 18. PMID 38325215
• Guinot PG, Bernard E, Levrard M, Dupont H, Lorne E. Dynamic arterial elastance predicts mean arterial pressure decrease associated with decreasing norepinephrine dosage in septic shock. Crit Care. 2015 Jan 19;19(1):14. doi: 10.1186/s13054-014-0732-5. PMID 25598221
• Monge Garcia MI, Jian Z, Settels JJ, Hunley C, Cecconi M, Hatib F, Pinsky MR. Performance comparison of ventricular and arterial dP/dtmax for assessing left ventricular systolic function during different experimental loading and contractile conditions. Crit Care. 2018 Nov 29;22(1):325. doi: 10.1186/s13054-018-2260-1. PMID 30486866

Identifiers

NCT: NCT06937918 · SI 118/2025

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗