ShockAFRICNCT05046340
Applicability of Fluid Responsiveness Indices in Circulatory Failure (AFRIC Study) Study Project
An observational study of Shock and Acute Circulatory Failure, run by Bicetre Hospital at 1 site in France.
Trial summary
Fluid administration is one of the main strategies for patients with acute circulatory failure. However, about half of the patients could not benefit from the fluid administration after the ICU admission. Thus predict the effect of fluid responsiveness is essential. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Shock, Acute Circulatory Failure
- What is being tested?
- Passive leg raising
- How many people
- 200 participants
- Where
- 1 siteFrance
- Study dates
- 10 Jan 2019to 31 Dec 2023
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adult patients with acute circulatory failure need to evaluate fluid responsiveness.
Who may be able to join
- Age ≥ 18
- The presence of acute circulatory insufficiency defined by the following pragmatic criteria:
- Prior administration of at least 1000 mL of crystalloid or colloid solute during a volemic expansion in the previous 12 hours
- Norepinephrine administration/lactate ≥ 1.5 mmol/L
Who cannot join
- No strict exclusion criterion only if the refusal of the patient.
Trial locations and contacts
1 site in 1 country.
France1 site, 1 recruiting
- Recruiting
Medical Intensive Care Unit
Le Kremlin-Bicêtre
Xavier Monnet, MD, PhD
Xavier Monnet, MD, PhD
About this study
Official title: Applicability of Fluid Responsiveness Indices in Patients With Acute Circulatory Failure (AFRIC Study)
Fluid administration is one of the main strategies for patients with acute circulatory failure. However, about half of the patients could not benefit from the fluid administration after the ICU admission. Thus predict the effect of fluid responsiveness is essential. There are sevral indices or tests can be used, such as pulse pressure variation (PPV), end-expiratory occulsion test (EEOT), passive leg raising (PLR), etc. Question of the prevalence of cases in which the different predictive indices of fluid responsiveness in intensive care unit (ICU) are not applicable.
Read the detailed description
Fluid administration is one of the first-line therapies for most patients with acute circulatory failure. And it was supposed to increase cardiac preload and thus output significantly. However, it only has this effect if cardiac output is dependent on cardiac preload, that is if both ventricles work on the ascending part of the Frank-Starling curve. Our group had already shown that, in half of the critically ill patients admitted in ICU, fluid administration is likely to exert only deleterious effects without any hemodynamic benefit. To predict whether it will exert beneficial effects or not before administering the fluid therapy, a "dynamic approach" has been developed. It consists of observing the effects of changes of preload induced by various tests on cardiac output. 1) Pulse pressure variation: mechanical ventilation induces cyclical changes in cyclical changes in cardiac preload and right ventricular afterload due to cardiopulmonary interactions. If both ventricles are in a preload-dependent state, these variations will induce a cyclical variation in stroke volume. The latter being physiologically related to the pulsed arterial pressure (systolic - diastolic), the respiratory variation of the pulsed arterial pressure (PPV) indicates the existence of a preload-dependence of the two ventricles. 2) The End-expiratory occlusion test (EEOT): this is another method that takes advantage of heart-lung interactions to predict fluid responsiveness in ventilated patients. During mechanical ventilation, each insufflation increases intrathoracic pressure, which hinders systemic venous return. Thus, interrupting the respiratory cycle at the end of expiration inhibits this cyclic hindrance to venous return, increases cardiac preload and cardiac output if both ventricles are preload dependent. The duration of the EEOT must be at least 15 seconds. 3): Passive leg raising (PLR): when a patient is in a recumbent position, the elevation of the lower extremities and the horizontalization of the trunk passively transfers a significant volume of blood from the lower part of the body to the heart chambers and mimics volume expansion.
Numerous studies have reported that the increased cardiac output induced by PLR predicts fluid responsiveness. There is always the question of the prevalence of cases in which the different predictive indices of fluid responsiveness are not applicable and data on this issue are scarce, incomplete, and unsatisfactory.
Few studies have systematically investigated the number of patients in whom PPV cannot be used in the ICU settings. Some studies have reported a very low prevalence of cases where PPV was usable but they included the entire ICU population on a given day, including many patients who did not have an acute circulatory failure, which had no sense since PPV is only used in patients in whom the question of fluid therapy arises. Other studies have reported a higher prevalence of cases where PPV is usable, but they have only looked at the first 24 hours of hospitalization or have focused on patients with an unstable hemodynamic event. Finally, no study has ever studied the prevalence of cases where the respiratory variation of the PLR, or the EEOT are not applicable.
- Conditions
- Shock, Acute Circulatory Failure
- Being tested
- Passive leg raising
- Keywords
- pulse pressure variation, passive leg raising, end-expiratory occulsion test
- Medical subject headings
- Shock
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Passive leg raisingOther
Also called end-expiratory occulsion test
We perform the PLR test by adjusting the bed and not by manually raising the patient's legs. Bronchial secretions must be carefully aspirated before PLR. If awake, the patient should be informed of what the test involves. And measure the cardiac output by using certain devices at the bedside. The end-expiratory occlusion consists in interrupting the ventilator at end-expiration for 15-30 s and assessing the resulting changes in cardiac output.
What is being measured
The primary outcome is the main question the study is designed to answer.
The prevalence of cases and reasons in which the conditions that the PPV cannot be correctly interpreted.
By using one arterial line, the scope at the bedside could have a PPV value that automatly calculated on the screen.
Measured: One minute at the bedside
The prevalence of cases and reasons in which the conditions that the EEOT cannot be correctly interpreted.
Measured: 15 seconds for EEOT
The prevalence of cases and reasons in which the conditions that the PLR cannot be correctly interpreted.
Measured: One minute fot the passive leg raising
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Sep 2021
- Study start10 Jan 2019
- Primary completion28 Feb 2023 (estimated)
- Study completion31 Dec 2023 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (9)Papers the sponsor has linked to this study.
- Other trials for ShockStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 200 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Bicetre Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Rui Shi, MD, PhD, Bicetre Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05046340
- Sponsor's protocol ID
- 2017-A03580-53
- Acronym
- AFRIC
- Status last verified
- Feb 2023
- First submitted
- 13 Sep 2021
- Last updated
- 14 Feb 2023
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Benes J, Kirov M, Kuzkov V, Lainscak M, Molnar Z, Voga G, Monnet X. Fluid Therapy: Double-Edged Sword during Critical Care? Biomed Res Int. 2015;2015:729075. doi: 10.1155/2015/729075. Epub 2015 Dec 22.
PubMed 26798642Michard F, Teboul JL. Predicting fluid responsiveness in ICU patients: a critical analysis of the evidence. Chest. 2002 Jun;121(6):2000-8. doi: 10.1378/chest.121.6.2000.
PubMed 12065368Michard F, Boussat S, Chemla D, Anguel N, Mercat A, Lecarpentier Y, Richard C, Pinsky MR, Teboul JL. Relation between respiratory changes in arterial pulse pressure and fluid responsiveness in septic patients with acute circulatory failure. Am J Respir Crit Care Med. 2000 Jul;162(1):134-8. doi: 10.1164/ajrccm.162.1.9903035.
PubMed 10903232Marik PE, Cavallazzi R, Vasu T, Hirani A. Dynamic changes in arterial waveform derived variables and fluid responsiveness in mechanically ventilated patients: a systematic review of the literature. Crit Care Med. 2009 Sep;37(9):2642-7. doi: 10.1097/CCM.0b013e3181a590da.
PubMed 19602972Heenen S, De Backer D, Vincent JL. How can the response to volume expansion in patients with spontaneous respiratory movements be predicted? Crit Care. 2006;10(4):R102. doi: 10.1186/cc4970.
PubMed 16846530Soubrier S, Saulnier F, Hubert H, Delour P, Lenci H, Onimus T, Nseir S, Durocher A. Can dynamic indicators help the prediction of fluid responsiveness in spontaneously breathing critically ill patients? Intensive Care Med. 2007 Jul;33(7):1117-1124. doi: 10.1007/s00134-007-0644-9. Epub 2007 May 17.
PubMed 17508201Muller L, Louart G, Bousquet PJ, Candela D, Zoric L, de La Coussaye JE, Jaber S, Lefrant JY. The influence of the airway driving pressure on pulsed pressure variation as a predictor of fluid responsiveness. Intensive Care Med. 2010 Mar;36(3):496-503. doi: 10.1007/s00134-009-1686-y. Epub 2009 Oct 22.
PubMed 19847400Malbrain ML, Reuter DA. Assessing fluid responsiveness with the passive leg raising maneuver in patients with increased intra-abdominal pressure: be aware that not all blood returns! Crit Care Med. 2010 Sep;38(9):1912-5. doi: 10.1097/CCM.0b013e3181f1b6a2. No abstract available.
PubMed 20724891Delannoy B, Wallet F, Maucort-Boulch D, Page M, Kaaki M, Schoeffler M, Alexander B, Desebbe O. Applicability of Pulse Pressure Variation during Unstable Hemodynamic Events in the Intensive Care Unit: A Five-Day Prospective Multicenter Study. Crit Care Res Pract. 2016;2016:7162190. doi: 10.1155/2016/7162190. Epub 2016 Mar 31.
PubMed 27127648
Study at a glance
From the registry record, last updated by the sponsor on 14 Feb 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Applicability of Fluid Responsiveness Indices in Patients With Acute Circulatory Failure (AFRIC Study)
- ClinicalTrials.gov ID
- NCT05046340
- Acronym / sponsor ID
- AFRIC / 2017-A03580-53
- Conditions
- Shock, Acute Circulatory Failure
- Keywords
- pulse pressure variation, passive leg raising, end-expiratory occulsion test
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 200 participants (estimated)
- Lead sponsor
- Bicetre HospitalUniversity, hospital or other
- Study start
- 10 Jan 2019 (actual)
- Primary completion
- 28 Feb 2023 (estimated)
- Study completion
- 31 Dec 2023 (estimated)
- First posted
- 16 Sep 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Fluid administration is one of the main strategies for patients with acute circulatory failure. However, about half of the patients could not benefit from the fluid administration after the ICU admission. Thus predict the effect of fluid responsiveness is essential. There are sevral indices or tests can be used, such as pulse pressure variation (PPV), end-expiratory occulsion test (EEOT), passive leg raising (PLR), etc. Question of the prevalence of cases in which the different predictive indices of fluid responsiveness in intensive care unit (ICU) are not applicable.
Detailed description
Fluid administration is one of the first-line therapies for most patients with acute circulatory failure. And it was supposed to increase cardiac preload and thus output significantly. However, it only has this effect if cardiac output is dependent on cardiac preload, that is if both ventricles work on the ascending part of the Frank-Starling curve. Our group had already shown that, in half of the critically ill patients admitted in ICU, fluid administration is likely to exert only deleterious effects without any hemodynamic benefit. To predict whether it will exert beneficial effects or not before administering the fluid therapy, a "dynamic approach" has been developed. It consists of observing the effects of changes of preload induced by various tests on cardiac output. 1) Pulse pressure variation: mechanical ventilation induces cyclical changes in cyclical changes in cardiac preload and right ventricular afterload due to cardiopulmonary interactions. If both ventricles are in a preload-dependent state, these variations will induce a cyclical variation in stroke volume. The latter being physiologically related to the pulsed arterial pressure (systolic - diastolic), the respiratory variation of the pulsed arterial pressure (PPV) indicates the existence of a preload-dependence of the two ventricles. 2) The End-expiratory occlusion test (EEOT): this is another method that takes advantage of heart-lung interactions to predict fluid responsiveness in ventilated patients. During mechanical ventilation, each insufflation increases intrathoracic pressure, which hinders systemic venous return. Thus, interrupting the respiratory cycle at the end of expiration inhibits this cyclic hindrance to venous return, increases cardiac preload and cardiac output if both ventricles are preload dependent. The duration of the EEOT must be at least 15 seconds. 3): Passive leg raising (PLR): when a patient is in a recumbent position, the elevation of the lower extremities and the horizontalization of the trunk passively transfers a significant volume of blood from the lower part of the body to the heart chambers and mimics volume expansion.
Numerous studies have reported that the increased cardiac output induced by PLR predicts fluid responsiveness. There is always the question of the prevalence of cases in which the different predictive indices of fluid responsiveness are not applicable and data on this issue are scarce, incomplete, and unsatisfactory.
Few studies have systematically investigated the number of patients in whom PPV cannot be used in the ICU settings. Some studies have reported a very low prevalence of cases where PPV was usable but they included the entire ICU population on a given day, including many patients who did not have an acute circulatory failure, which had no sense since PPV is only used in patients in whom the question of fluid therapy arises. Other studies have reported a higher prevalence of cases where PPV is usable, but they have only looked at the first 24 hours of hospitalization or have focused on patients with an unstable hemodynamic event. Finally, no study has ever studied the prevalence of cases where the respiratory variation of the PLR, or the EEOT are not applicable.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adult patients with acute circulatory failure need to evaluate fluid responsiveness.
Key inclusion criteria (4 listed)
- Age ≥ 18
- The presence of acute circulatory insufficiency defined by the following pragmatic criteria:
Key exclusion criteria (1 listed)
- No strict exclusion criterion only if the refusal of the patient.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Passive leg raisingAlso: end-expiratory occulsion testWe perform the PLR test by adjusting the bed and not by manually raising the patient's legs. Bronchial secretions must be carefully aspirated before PLR. If awake, the patient should be informed of what the test involves. And measure the cardiac output by using certain devices at the bedside. The end-expiratory occlusion consists in interrupting the ventilator at end-expiration for 15-30 s and assessing the resulting changes in cardiac output. | Other | – |
Primary outcome
The prevalence of cases and reasons in which the conditions that the PPV cannot be correctly interpreted.
Time frame: One minute at the bedside
By using one arterial line, the scope at the bedside could have a PPV value that automatly calculated on the screen.
The prevalence of cases and reasons in which the conditions that the EEOT cannot be correctly interpreted.
Time frame: 15 seconds for EEOT
The prevalence of cases and reasons in which the conditions that the PLR cannot be correctly interpreted.
Time frame: One minute fot the passive leg raising
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 14 Feb 2023.
- Background: PubMed 26798642Benes J, Kirov M, Kuzkov V, Lainscak M, Molnar Z, Voga G, Monnet X. Fluid Therapy: Double-Edged Sword during Critical Care? Biomed Res Int. 2015;2015:729075. doi: 10.1155/2015/729075. Epub 2015 Dec 22.
- Background: PubMed 12065368Michard F, Teboul JL. Predicting fluid responsiveness in ICU patients: a critical analysis of the evidence. Chest. 2002 Jun;121(6):2000-8. doi: 10.1378/chest.121.6.2000.
- Background: PubMed 10903232Michard F, Boussat S, Chemla D, Anguel N, Mercat A, Lecarpentier Y, Richard C, Pinsky MR, Teboul JL. Relation between respiratory changes in arterial pulse pressure and fluid responsiveness in septic patients with acute circulatory failure. Am J Respir Crit Care Med. 2000 Jul;162(1):134-8. doi: 10.1164/ajrccm.162.1.9903035.
- Background: PubMed 19602972Marik PE, Cavallazzi R, Vasu T, Hirani A. Dynamic changes in arterial waveform derived variables and fluid responsiveness in mechanically ventilated patients: a systematic review of the literature. Crit Care Med. 2009 Sep;37(9):2642-7. doi: 10.1097/CCM.0b013e3181a590da.
- Background: PubMed 16846530Heenen S, De Backer D, Vincent JL. How can the response to volume expansion in patients with spontaneous respiratory movements be predicted? Crit Care. 2006;10(4):R102. doi: 10.1186/cc4970.
- Background: PubMed 17508201Soubrier S, Saulnier F, Hubert H, Delour P, Lenci H, Onimus T, Nseir S, Durocher A. Can dynamic indicators help the prediction of fluid responsiveness in spontaneously breathing critically ill patients? Intensive Care Med. 2007 Jul;33(7):1117-1124. doi: 10.1007/s00134-007-0644-9. Epub 2007 May 17.
- Background: PubMed 19847400Muller L, Louart G, Bousquet PJ, Candela D, Zoric L, de La Coussaye JE, Jaber S, Lefrant JY. The influence of the airway driving pressure on pulsed pressure variation as a predictor of fluid responsiveness. Intensive Care Med. 2010 Mar;36(3):496-503. doi: 10.1007/s00134-009-1686-y. Epub 2009 Oct 22.
- Background: PubMed 20724891Malbrain ML, Reuter DA. Assessing fluid responsiveness with the passive leg raising maneuver in patients with increased intra-abdominal pressure: be aware that not all blood returns! Crit Care Med. 2010 Sep;38(9):1912-5. doi: 10.1097/CCM.0b013e3181f1b6a2. No abstract available.
- Background: PubMed 27127648Delannoy B, Wallet F, Maucort-Boulch D, Page M, Kaaki M, Schoeffler M, Alexander B, Desebbe O. Applicability of Pulse Pressure Variation during Unstable Hemodynamic Events in the Intensive Care Unit: A Five-Day Prospective Multicenter Study. Crit Care Res Pract. 2016;2016:7162190. doi: 10.1155/2016/7162190. Epub 2016 Mar 31.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Shock and Acute Circulatory Failure, run by Bicetre Hospital at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 14 Feb 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Rui SHI, M.D. (0642170297, rui.shi@u-psud.fr), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The prevalence of cases and reasons in which the conditions that the PPV cannot be correctly interpreted. (time frame: One minute at the bedside). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05046340, which also lists 9 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Feb 2023.