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CompletedNCT02502773FLASHUpdated Aug 5, 2026

Fluid Loading in Abdominal Surgery: Saline Versus Hydroxyethyl Starch (FLASH Study)

A Phase 3 interventional study of Hydroxethyl starch in Postoperative Morbidity and Postoperative Mortality, sponsored by University Hospital, Clermont-Ferrand. Completed at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-05.

Sponsored by University Hospital, Clermont-Ferrand · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
826
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

The primary purpose of the study is to evaluate whether the type of fluid (0.9% saline or 6% Hydroxyethyl starch 130/0.4) in the context of an individualized goal-directed fluid therapy is associated with a difference in morbidity and mortality within the first 14 days in patients at moderate-to-high risk of postoperative complications after abdominal surgery.

Read the detailed description

Fluid administration is the mainstay treatment for suspected hypovolemia during surgery, but the effects of different crystalloid and colloid solutions on outcome remain poorly explored in surgical patients.

Two recent international multicenter studies (6S and CHEST studies) have shown that, compared to crystalloid solutions, the use of hydroxyethyl starch (HES) could be responsible for higher morbidity, especially renal failure, and mortality in ICU patients, thus leading to a recent restriction of their range of indications.

In contrast, in surgical patients, recent meta-analyses have concluded on the absence of difference in terms of mortality and postoperative renal failure between crystalloids and latest generation HES. Excessive fluid administration during surgery is associated with increased risk of postoperative morbidity, including renal dysfunction and mortality. It has been suggested that, compared with the volume-restoring effects of colloids, crystalloid use may require the administration of higher fluid volumes, which may contribute to poorer outcomes. In the surgical context, clinical trials and meta-analyses have shown that individualized goal-direct fluid administration can reduce postoperative morbidity. Although most GDT studies have used colloid solutions for fluid loading, the effects of the type of fluids are currently unknown and crystalloids are proposed for first-line therapy.

The proposed Flash multicenter study will be conducted to assess if the use of HES or crystalloid solutions during an individualized GDT contribute to outcome differences in patients at moderate-to-high risk of postoperative complications after abdominal surgery. As these fluids are widely used during surgery and because of current concerns about the risks related to the use of HES-based products in ICU patients, the trial will provide important data to clinicians involved in perioperative care.

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Conditions studied

  • Postoperative Morbidity
  • Postoperative Mortality

Keywords

  • Goal-directed therapy
  • Fluid loading
  • Abdominal surgery
  • Postoperative morbidity
  • Postoperative mortality
  • Individualized goal-directed fluid therapy
  • Elective or emergency abdominal surgery
  • General Anesthesia
  • Moderate-to-high risk surgical patients
03

In context

Lead sponsor

University Hospital, Clermont-Ferrand is the lead sponsor of 841 studies on the registry; 178 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

All adult patients who

  • Undergo elective or emergency abdominal surgery under general anesthesia
  • With an estimated surgical duration greater than or equal to 2 hours
  • With moderate-to-high risk of postoperative complications defined by an AKI risk index≥ class 3, as defined by the presence of at least 4 of the following factors: age> 56 years, male gender, intraperitoneal surgery, active congestive heart failure, ascites, hypertension, emergency surgery, mild or moderate renal insufficiency, diabetes mellitus treated by oral or insulin therapy

Exclusion criteria

Exclusion Criteria:

The following patients will not be evaluated for inclusion:

  • Age \<18 years
  • Preoperative acute heart failure
  • Preoperative acute coronary insufficiency
  • Preoperative severe renal failure (defined by creatinine clearance \<30 ml/min or requiring renal replacement therapy)
  • Preoperative shock defined by the need for vasoactive amines
  • History of allergy with the use of 6% Hydroxethyl starch 130/0.4
  • Contraindication to the use of HES: sepsis, burnt patient, renal insufficiency or dialysis, cerebral hemorrhage, ICU patient , hypervolemia, lung edema, dehydration, severe hypernatremia or severe hyperchloremia, severe hepatic insufficiency, congestive heart failure, severe coagulopathy, organ transplant
  • Patient's or relative's refusal to participate
  • Parturient or breastfeeding woman
  • Protected major (guardianship)
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
826 participants (actual)

Study arms

  • Experimental
    crystalloid group

    The proposed Flash multicenter study will be conducted to assess if the use of HES or crystalloid solutions during an individualized GDT contribute to outcome differences in patients at moderate-to-high risk of postoperative complications after abdominal surgery

    Drug: Hydroxethyl starch

  • Experimental
    colloid group

    The proposed Flash multicenter study will be conducted to assess if the use of HES or crystalloid solutions during an individualized GDT contribute to outcome differences in patients at moderate-to-high risk of postoperative complications after abdominal surgery

    Drug: Hydroxethyl starch

Interventions

  • DrugHydroxethyl starch
06

What researchers measure

Primary outcomes

  1. Renal dysfunction

    Renal dysfunction (defined by KDIGO stage 1 or higher)

    Time frame: during the first 14 postoperative days

  2. Pulmonary complication

    Pulmonary complication (defined by the need for noninvasive or invasive ventilatory assistance for postoperative acute respiratory failure)

    Time frame: during the first 14 postoperative days

  3. Cardiovascular complication

    Cardiovascular complication (defined by the development of acute heart failure)

    Time frame: during the first 14 postoperative days

  4. Infectious complication

    Infectious complication (defined by the development of sepsis, severe sepsis or septic shock)

    Time frame: during the first 14 postoperative days

  5. Surgical complication

    Surgical complication (defined as the need for surgical reoperation)

    Time frame: during the first 14 postoperative days

Secondary outcomes

  1. Total fluid volume

    Total fluid volume (0.9% saline and HES 130/0.4)

    Time frame: during the surgical period and the first 24 postoperative hours

  2. Volume of blood loss

    Time frame: during the surgical period and the first 24 postoperative hours

  3. Renal complications : oliguria

    Postoperative complications

    Time frame: within 14 days

  4. Cardiovascular complications

    Postoperative complications

    Time frame: within 14 days

  5. Respiratory complications

    Postoperative complications

    Time frame: within 14 days

  6. SIRS score

    Postoperative complications

    Time frame: within 14 days

  7. Infectious complications

    Postoperative complications

    Time frame: within 14 days

  8. Surgical complications

    Postoperative complications

    Time frame: within 14 days

  9. Severity organ failure assessment score from postoperative

    Time frame: Day-1 to Day-7

  10. Unexpected ICU admission (or readmission) following surgery

    Time frame: within 28 days

  11. All-cause mortality

    Time frame: 28 days

  12. All-cause mortality

    Time frame: 3 months

  13. Serum lactate

    Time frame: from Day-1 to Day-7

  14. C-reactive protein

    Time frame: from Day-1 to Day-7

  15. Plasma chloride

    Time frame: from Day-1 to Day-7

  16. number of units of packed red blood cells

    Time frame: during the surgical period and the first 24 postoperative hours

07

Study locations

1 site
  • CHU Clermont-Ferrand
    Clermont-Ferrand, 63003, France
08

References and documents

Publications

  • Futier E, Garot M, Godet T, Biais M, Verzilli D, Ouattara A, Huet O, Lescot T, Lebuffe G, Dewitte A, Cadic A, Restoux A, Asehnoune K, Paugam-Burtz C, Cuvillon P, Faucher M, Vaisse C, El Amine Y, Beloeil H, Leone M, Noll E, Piriou V, Lasocki S, Bazin JE, Pereira B, Jaber S; FLASH Trial Group; Lasocki S, Huet O, Cadic A, Jacob C, Paugam-Burtz C, Restoux A, Ouattara A, Feitita I, Deloge E, Defaye M, Joannes-Boyau O, Carles P, Napolitano G, Monziols S, Futier E, Vignaud M, Paul S, Gahbiche K, Fayon J, Laroche E, Bazin JE, Brandely A, Le Moal C, Lebuffe G, Garot M, Piriou V, Jaber S, Chanques G, Verzilli D, De Jong A, Millot A, Castagnoli A, Leone M, Pastene B, Castelli C, Medam S, Velly L, Vaisse C, Faucher M, Asehnoune K, Samba E, Roquilly A, Le Penndu M, Cuvillon P, Yves Lefrant J, Wira O, Dubout E, Mfam WS, Lescot T, Begneu E, Burey J, Cirilovic T, Beloeil H, Allo G, Pottecher J, Lebas B, Venot C, Rameau JP, Dimache F, Leger PS, El Amine Y. Effect of Hydroxyethyl Starch vs Saline for Volume Replacement Therapy on Death or Postoperative Complications Among High-Risk Patients Undergoing Major Abdominal Surgery: The FLASH Randomized Clinical Trial. JAMA. 2020 Jan 21;323(3):225-236. doi: 10.1001/jama.2019.20833. PubMed 31961418 ↗
  • Futier E, Biais M, Godet T, Bernard L, Rolhion C, Bourdier J, Morand D, Pereira B, Jaber S; FLASH trial management committee. Fluid loading in abdominal surgery - saline versus hydroxyethyl starch (FLASH Trial): study protocol for a randomized controlled trial. Trials. 2015 Dec 21;16:582. doi: 10.1186/s13063-015-1085-3. PubMed 26690683 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 5, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02502773
Lead sponsor
University Hospital, Clermont-Ferrand
Collaborators
Agence Nationale de sécurité du Médicament, Programme Hospitalier de Recherche Clinique (AOI N° 2013 _ Futier), Société Française Anesthesie-Réanimation (SFAR)
Responsible party
Sponsor
First posted
Jul 20, 2015
Start date
Feb 2016
Primary completion
Jul 22, 2018
Completion
Oct 22, 2018
Last update
Aug 5, 2026

Study contacts

Emmanuel FUTIER
principal investigator · University Hospital, Clermont-Ferrand
Jean-Etienne BAZIN
principal investigator · University Hospital, Clermont-Ferrand
Samir JABER
principal investigator · University Hospital, Montpellier
Julien POTTECHER
principal investigator · CHRU Strasbourg
Alexandre OUATTARA
principal investigator · University Hospital, Bordeaux
Thomas LESCOT
principal investigator · Hôpital Saint-Antoine (APHP)
Hélène BELOEIL
principal investigator · Rennes University Hospital
Gilles LEBUFFE
principal investigator · CHRU LILLE
Philippe CUVILLON
principal investigator · CHU Nîmes
Julien BUREY
principal investigator · Hôpital Tenon (APHP)
Willy-Serge MFAM
principal investigator · CH ORLEANS
Vincent PIRIOU
principal investigator · Hospices Civils de Lyon
Marc LEONE
principal investigator · AP-HM
Sébastien BERTRAN
principal investigator · CHU Nîmes
Marion FAUCHER
principal investigator · Institut Paoli-Calmettes
Catherine PAUGAM-BURTZ
principal investigator · Hôpital Beaujon
Lionel VELLY
principal investigator · AP-HM
Olivier HUET
principal investigator · CHU Brest
Sigismond LASOCKI
principal investigator · University Hospital, Angers
Pierre SAINT-LEGER
principal investigator · CH VALENCIENNES
View the source record on ClinicalTrials.gov ↗

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