- Open Access
Physiological changes after fluid bolus therapy in sepsis: a systematic review of contemporary data
Critical Care volume 18, Article number: 696 (2014)
Fluid bolus therapy (FBT) is a standard of care in the management of the septic, hypotensive, tachycardic and/or oliguric patient. However, contemporary evidence for FBT improving patient-centred outcomes is scant. Moreover, its physiological effects in contemporary ICU environments and populations are poorly understood. Using three electronic databases, we identified all studies describing FBT between January 2010 and December 2013. We found 33 studies describing 41 boluses. No randomised controlled trials compared FBT with alternative interventions, such as vasopressors. The median fluid bolus was 500 ml (range 100 to 1,000 ml) administered over 30 minutes (range 10 to 60 minutes) and the most commonly administered fluid was 0.9% sodium chloride solution. In 19 studies, a predetermined physiological trigger initiated FBT. Although 17 studies describe the temporal course of physiological changes after FBT in 31 patient groups, only three studies describe the physiological changes at 60 minutes, and only one study beyond this point. No studies related the physiological changes after FBT with clinically relevant outcomes. There is a clear need for at least obtaining randomised controlled evidence for the physiological effects of FBT in patients with severe sepsis and septic shock beyond the period immediately after its administration.
‘Just as water retains no shape, so in warfare there are no constant conditions’
Sun Tzu (‘The Art of War’)
All critically ill patients receive intravenous (IV) fluids, which are given to maintain physiological homeostasis, or as a vehicle for drug administration, or as direct therapeutic administration to correct perceived haemodynamic instability -. In these situations, where there is a perceived reduction in venous return and cardiac output secondary to vasodilatation and/or hypovolaemia, using IV fluid to increase intravascular volume is believed to effectively compensate for these changes in vascular tone by increasing stroke volume in accordance with the Frank-Starling principle -.
Several mechanisms for delivering IV fluids, both diagnostically and therapeutically under such circumstances, have been described. These include Weil’s central venous pressure (CVP)-guided fluid challenge technique -, the timed and rapid infusion methods favoured by Shoemaker ,,- and, more recently, techniques involving echocardiographic or ultrasonographic assessment of fluid responsiveness following low-volume IV infusion . However, the current standard of care in the management of septic, hypotensive, tachycardic and/or oliguric patients is fluid bolus therapy (FBT), where IV fluid is rapidly administered in discrete boluses -. While the ideal fluid bolus would be a discrete volume of a specific fluid administered at a specified rate, accounting for individual patient features and with a defined aim (Figure 1) , there is no current agreement regarding exactly what defines a fluid bolus. Moreover, although strong overall consensus regarding the importance of FBT exists -, there appears to be little randomized controlled information on the magnitude and duration of its physiological effects, or on the direct positive impact of FBT on patient outcome in sepsis as an independent intervention .
In contrast, an expanding body of evidence suggests that FBT may contribute to a positive fluid balance, which, in turn, is independently associated with a variety of adverse outcomes in the critically ill -. Recent experimental evidence suggests rapid fluid infusion can also damage the endothelial glycocalyx ,, a structure already at risk in patients with sepsis , leading to endothelial disruption and organ dysfunction ,. It appears that we need a better understanding of both the current evidence base for FBT and how best to apply it in the clinical setting ,.
Accordingly, we systematically reviewed the contemporary literature to determine current practice and to identify the independent effects of FBT on both physiological and patient-centred outcomes in the management of severe sepsis and septic shock in critical care practice.
We interrogated the MEDLINE, CENTRAL and EMBASE electronic reference databases using a combination of search terms (Figure 2). The reference lists of retrieved articles were examined for additional studies of potential relevance. The search was carried out in December 2013. To achieve contemporary relevance results were arbitrarily limited to this decade (2010 to 2013) and to English language studies in humans. Paediatric studies were excluded. This search defined a set of records of studies of fluid administration or haemodynamic optimization in patients with severe sepsis or septic shock.
The abstracts of these records were examined to identify those studies of potential relevance. These manuscripts were retrieved and examined manually in accordance with our inclusion criteria. The studies to be included in the review were checked to ensure they had not been retracted subsequent to their publication.
Study inclusion criteria
Population of included studies
We considered clinical studies of any type describing a population of patients suffering from severe sepsis or septic shock. We also included those studies of shock or circulatory failure where either the majority of patients, or a defined subgroup of patients, had severe sepsis or septic shock.
Intervention - fluid bolus administration
For the purposes of this study a fluid bolus was a defined volume of a defined fluid administered over a defined time period. We recognised that most studies do not describe FBT in ideal terms (Figure 1) and therefore studies describing at least two of the three criteria were included in the review.
Comparator - alternatives to fluid administration
Any studies comparing FBT with the initiation of vasoactive medication, the increase of such medication or observation as an alternative to the administration of FBT were included in the review.
Between groups analysis
Where studies included in the review assigned patients to multiple treatment arms, each treatment group was treated as an individual group.
Outcome - physiological effects of bolus administration
Subsets of studies were selected from those describing FBT. The first included those reporting changes in cardiac output, heart rate, mean arterial pressure, central venous pressure, venous oxygen saturation, blood lactate concentration, urine output or haemoglobin concentration following FBT; for the purposes of inclusion, studies could describe changes in any or all of the haemodynamic parameters listed, but the direction, magnitude and duration of the change had to be extractable from tables or figures contained in the paper. The second group included those reporting non-physiological, patient-centred outcomes. Our primary outcome of interest was mortality at all reported time points. Secondary outcomes of interest included duration of ICU and hospital stay, duration of mechanical ventilation, and need for continuous renal replacement therapy (CRRT). We did not contact authors for additional information or individual patient data.
We collected data on study type, study setting and location, study population and the aims of the study. Due to our acceptance of multiple types of study, we chose not to adopt a methodological scoring system. We examined the definition of a fluid bolus in each study fulfilling our criteria and recorded the type and volume of fluid used, as well as the rate of administration. We identified the trigger and end-points for fluid bolus administration, the number of boluses administered and the use of red cell transfusions and vasoactive medication as part of the experimental protocol. We identified the demographic group in which subsequent observations were recorded. In those studies describing the physiological effects of bolus administration, we recorded the absolute change in cardiac output, heart rate, mean arterial pressure, venous oxygen saturation, blood lactate concentration, urine output and haemoglobin concentration. In those studies reporting patient-centred outcomes we recorded mortality at all reported time points, duration of ICU and hospital stay, duration of mechanical ventilation, and need for CRRT.
We expected grossly heterogeneous results across different study types and study protocols. A meta-analysis approach could not be applied. Results are therefore presented as crude medians with full ranges. These exclude alternative units of measure, which are reported separately - for example, the median may be given in millilitres, followed by individual reporting of ml/kg.
Our search strategy identified 2,956 articles over the period 2010 to 2013. Of these, 2,875 were excluded as duplicates, irrelevant, paediatric research or having been published in a language other than English. Of the 81 potentially relevant publications identified, 33 met our inclusion criteria (Figure 3) -. In total, 17 of these described the physiological changes occurring following FBT ,,,,,,,-,,,,,,, and seven studies described patient-orientated outcome measures ,,,,,,.
Relevant contemporary studies
The study details, population, size and aims are presented in Table 1. We identified 22 prospective observational studies, four retrospective observational studies, two quasi-experimental studies, and five randomised controlled trials (RCTs). Of the five RCTs, none compared FBT with a control intervention; two actually reported the impact of blood volume analysis on protocolized resuscitation ,; two compared hypertonic versus isotonic fluids ,; and one actually compared two vasopressors and reported fluid data as an addendum . Additional study data can be found in the electronic supplemental material (Additional file 1: Table S1).
Pre-fluid bolus therapy fluid administration
Fluid resuscitation prior to study recruitment and FBT was described in 10 studies. In the five studies describing finite volumes of resuscitation fluid, the median volume administered was 2,200 ml (range 1,000 to 5,060 ml) ,,,,. The five remaining studies reported weight-dependent volumes of between 20 and 30 ml/kg of resuscitation (Table 2) ,,,,.
Initiation and cessation of fluid bolus therapy
Across the 33 studies, 19 predetermined clinical or physiological features triggered FBT. In the remaining 14 studies, FBT was triggered by clinical judgment in eight, by ‘hypotension’ in two, simply by the diagnosis of severe sepsis or septic shock in two, and remained unspecified in two (Table 2).
In the majority of studies (18 of 33) FBT ceased at the end of the bolus in question; 10 studies used predetermined immediate changes in physiological variables as end-points; four studies did not define the physiological end-points of fluid resuscitation (Table 2).
Defining fluid bolus therapy
Overall, 41 forms of FBT were described, fully or in part, in 33 studies. They are presented in Table 2. In 20 studies, the fluid type was fixed; in 13 more than one fluid type was used. In six studies the fluid type was not identified beyond the generic ‘crystalloid or colloid’. The fluid most commonly used as a bolus was 0.9% saline (17 studies), followed by 6% hydroxyethyl starch (eight studies). On the other hand, 4% albumin was used in only four studies ,,,, 4% gelatin in only three ,,, physiological lactated solutions in only two ,, and 20% albumin and blood products in only one .
The median amount of fluid administered as a finite volume was 500 ml (range 100 to 1,000 ml). However, 20 ml/kg and 7 ml/kg were individually reported as weight-dependent boluses. The median number of boluses (24 studies) was 1 (range 0.68 to 10). Rates of administration were defined for 31 of 41 boluses with a median rate of 30 minutes (range 10 to 60 minutes).
Haemodynamic changes after fluid bolus therapy
Comparing different interventions
No RCTs compared the haemodynamic changes induced by FBT with ‘observation’ or ‘vasopressor administration’ or ‘inotropic drug administration’ or ‘continuous low dose IV fluid infusion’ or any combination of the above. The only study comparing FBT with an alternative intervention was a single, non-randomized, prospective, observational study that compared acute circulatory failure patients treated with FBT (500 ml of saline) or with increased norepinephrine dose according to clinician preference . The two groups had clearly different baseline characteristics and were not directly compared.
Temporal trends in physiological changes following fluid bolus therapy
The temporal change in physiological parameters following FBT is described in 31 different groups across 17 studies (Table 3).
Ten studies reported the physiological state after bolus administration in 18 groups immediately post-administration. In the six studies describing changes in cardiac index immediately post-FBT, cardiac index increased by a median of 800 ml/minute/m2 (range 0 to 1,300 ml/minute/m2). The median reduction in heart rate at the end of a fluid bolus (eight studies) was 2 bpm (range 10 to 0 bpm reduction) and the median increase in mean arterial pressure (eight studies) was 7 mmHg (range 1 to 15.2 mmHg). The median increase in CVP across five studies was 3.2 mmHg (range 2.3 to 5.2 mmHg). Only a single study reported the effect on venous oxygen saturation, blood lactate concentration or haemoglobin concentration. No study reported the effect on urine output.
Thirty minutes post-administration
Five studies reported the physiological effects of FBT 30 minutes after administration. Cardiac index increased by a median of 300 ml/minute/m2 (range -400 to 600 ml/minute/m2) in three studies. The median reduction in heart rate (five studies) was 2 bpm (range 11 bpm reduction to 0.3 bpm increase) and the median increase in mean arterial pressure (five studies) was 7.5 mmHg (range 3 to 11 mmHg). The median increase in CVP across four studies was 3 mmHg (range 2 to 5.25 mmHg). There was a median increase in central venous saturation of 2% (range 4% reduction to 8% increase) across two studies. Changes in other indices are reported in Table 3.
Sixty minutes post-administration
Only three studies reported the physiological effects of FBT 60 minutes after administration (Figure 4) ,,. Cardiac index increased by a median of 300 ml/minute/m2 (range -300 to 400 ml/minute/m2) in two studies. The median reduction in heart rate 60 minutes after a fluid bolus (three studies) was 1 bpm (range 11 bpm reduction to 2 bpm increase) and the median increase in mean arterial pressure (three studies) was 3 mmHg (range 2 to 7 mmHg). The median increase in CVP across three studies was 2 mmHg (range 1 to 3 mmHg). There was a median increase in central venous saturation of 1% (range 0.4% to 2% increase) across two studies.
Beyond 1 hour post-fluid bolus therapy
Comparing responders and non-responders
Overall, 10 studies compared the physiological responses to FBT administration between groups defined by changes in a physiological variable. Patients were defined as either responders or non-responders depending on the response exhibited. Different variables are used in different studies: stroke volume index (five studies), cardiac index or output (three studies), increase in oxygen consumption (one study) or aortic blood flow rate (one study). All reported changes only within 30 minutes of FBT completion (Additional file 1: Table S2).
In the six studies describing changes in cardiac index, cardiac index increased by a median of 850 ml/minute/m2 (range 600 to 1,300 ml/minute/m2) in fluid responders compared with 200 ml/minute/m2 (range 0 to 1,000 ml/minute/m2) in non-responders. The median increase in mean arterial pressure (10 studies) in responders was 9.5 mmHg (range 7 to 15.2 mmHg) versus 4.8 mmHg (range 1 to 13 mmHg) in non-responders. Similarly, the median increase in central venous pressure (six studies) was 3 mmHg (range 2.6 to 3.4 mmHg) in responders versus 3.7 mmHg (range 2 to 5.2 mmHg) in non-responders. The median decrease in heart rate (nine studies) was 3.3 bpm in responders (range 1.5 to 10 bpm decrease) and 1.2 bpm in non-responders (range 0 to 4 bpm decrease). Information on changes in venous oxygen saturation, blood lactate concentration, and blood haemoglobin concentration in the few studies reporting such data are presented in Additional file 1: Table S2.
The physiological effects of FBT grouped by speed of FBT delivery (Additional file 1: Table S3) and by class of fluid administered (Additional file 1: Table S4) have also been presented. There is no consistent pattern demonstrated across or between groups.
Relationship between physiological changes after fluid bolus therapy and clinical outcome
Overall, seven studies described clinically orientated outcomes ,,,,,,. All reported the effects of complex interventions, such as early goal-directed therapy. No studies examined the relationship between FBT and outcome directly (Tables 4 and 5).
We examined the contemporary literature on FBT in severe sepsis and septic shock and identified 33 original studies describing the characteristics of a fluid bolus, 17 of which also describe the associated physiological changes. We found heterogeneity of triggers, amount, fluid choice and speed of delivery for FBT, which was administered to achieve heterogeneous physiological targets. We similarly found heterogeneity of physiological changes after FBT. In addition, no RCTs compared FBT with an alternative intervention. Finally, no study related physiological changes after FBT to clinically relevant outcomes.
FBT is a widespread intervention in the management of the critically ill septic patient, despite lack of a consistent definition or use of terminology. Our study demonstrates that no contemporary RCTs exist that compare FBT with alternative interventions. The only study comparing FBT to an alternative intervention was a single, non-randomized, prospective, observational study that compared acute circulatory failure patients treated with FBT (500 ml of saline) or with increased norepinephrine dose according to clinician preference. The two groups had clearly different baseline characteristics and were not directly compared . Alternative interventions to FBT may include a diagnostic low-volume FBT , classic fluid challenge ,, low-volume FBT and low-dose vasopressor therapy, or cardiac output-guided therapy. Despite the availability of such strategies and the availability of non-invasive cardiac output monitoring, these alternative approaches have not been studied.
Understanding which patient will be fluid responsive is a vital part of rationalising fluid therapy . However, there are multiple different definitions of fluid responsiveness, each dependent on different interventions and different measurements. It would appear that there is little evidence to suggest a consistently different response to FBT based on pre-intervention physiology, as fluid responsiveness is often tautologically and retrospectively defined by participants’ responses to the therapy. A full review of this topic is beyond the scope of this review, though this information is available elsewhere ,.
The contribution of FBT to a positive fluid balance remains poorly understood. In a recent observational study, Bihari and colleagues  found that a median of 52.4% of fluid balance on the first, 30.8% on the second and 33.2% on the third study day consisted of FBT. In the Fluid and Catheter Treatment Trial  and Sepsis Occurrence in Acutely Ill Patients  studies, increasing fluid balance was associated with increased risk of acute kidney injury and mortality. In a retrospective study of septic shock patients in a North American university hospital, non-survivors had a significantly greater positive net fluid balance than survivors over the first 24 hours from onset . Our study also shows little or no evidence for any persisting beneficial physiological changes following FBT. These observations suggest the need for RCTs comparing FBT with alternative interventions and well-defined triggers and physiological outcomes.
This review has several strengths. To our knowledge this is the first review of the contemporary literature on FBT in critically ill patients with severe sepsis.
We are the first to explore the contemporary features of a FBT, and the first to produce a summary of the physiological changes associated with FBT in septic, critically ill patients, including data from RCTs, and observational and quasi-experimental studies. Our wide search criteria, use of three separate sources and hand searching references reduced the risk of inclusion bias and makes it unlikely that we missed relevant studies.
Our study also has some limitations. Our assessments of physiological changes are necessarily limited to the measures of central tendency provided in tables and graphs in the studies identified. We have only provided crude median results in an attempt to provide a rough estimate of possible effect. We limited our search to the present evolving decade. It is unlikely that current clinical practice is better reflected by earlier studies. Indeed, in comparing our results with similar, earlier studies, the reported physiological changes are similar ,-. We did not account for the effect of vasoactive medications beyond noting their administration. It appears obvious that the mixed and differential inotropic/vasopressor/lusitropic/chronotropic effects of different vasoactive medications are likely to have an effect on the physiological changes reported, as would the administration of blood products. Inadequate information was provided in the studies to make such adjustments possible. FBT is normally part of a complex intervention - the resuscitation of the critically ill patient. As well as the initiation and manipulation of vasoactive medications, analyses must contend with the impact of the use of mechanical ventilation, CRRT, and antibiotic administration. These confounders were not reliably reported in the studies identified and could not be evaluated. In addition, the perceived haemodynamic success of an intervention often depends on the trajectory of the patient’s clinical course. Unfortunately no such information was available from the studies reviewed.
FBT in severe sepsis and septic shock is described in 33 articles in the contemporary literature. Only 17 of these studies report the physiological changes associated with FBT. Evidence regarding the efficacy of FBT compared with alternative interventions is lacking. Crucially, no studies relate the physiological changes after FBT to clinically relevant outcomes. In light of recent studies highlighting the association between FBT and fluid administration in general and harm, there is a clear need for at least obtaining randomised controlled evidence for the physiological effects of FBT over the immediate (0 to 4 hours) post-intervention period in patients with severe sepsis and septic shock.
NJG: study design, electronic search design, literature search, study selection, data extraction, data handling/analysis, manuscript preparation, manuscript revision, and manuscript submission. GME: literature search, study selection, manuscript revision, and manuscript submission. RB: study design, electronic search design, data analysis, manuscript preparation, manuscript revision, and manuscript submission. All authors read and approved the final manuscript.
Continuous renal replacement therapy
Central venous pressure
Fluid bolus therapy
Randomised controlled trial
Holliday MA, Segar WE: The maintenance need for water in parenteral fluid therapy. Pediatrics. 1957, 19: 823-832.
Network SIG: Postoperative management in adults. A practical guide to postoperative care for clinical staff. SIGN Guidelines. 2004, Edinburgh, Healthcare Improvement Scotland
Powell-Tuck J, Gosling P, Lobo DN, Allison SP, Carlson GL, Gore M, Lewington AJ, Pearse RM, Mythen MG: British consensus guidelines on intravenous fluid therapy for adult surgical patients (GIFTASUP). [http://www.bapen.org.uk/pdfs/bapen_pubs/giftasup.pdf]
Resuscitation Council UK: Advanced Life Support Manual. 2011, Resuscitation Council (UK), London, 6
Carey JS, Mohr PA, Brown RS, Shoemaker WC: Cardiovascular function in hemorrhage, trauma and sepsis: determinants of cardiac output and cardiac work. Ann Surg. 1969, 170: 910-921. 10.1097/00000658-196912000-00010.
Hall JE: Cardiac output, venous return and their regulation. Guyton and Hall Textbook of Medical Physiology. Edited by: Hall JE, Guyton AC. 2011, Saunders Elsevier, Philadeliphia, PA, 229-241. 12
Shoemaker WC: Pathophysiologic mechanisms in shock and their therapeutic implications. Am J Surg. 1965, 110: 337-341. 10.1016/0002-9610(65)90068-1.
Shoemaker WC, Carey JS, Mohr PA, Brown RS, Monson DO, Yao ST, Kho LK, Stevenson A: Hemodynamic measurements in various types of clinical shock. Analysis of cardiac output and derived calculations in 100 surgical patients. Arch Surg. 1966, 93: 189-195. 10.1001/archsurg.1966.01330010191024.
Udhoji VN, Weil MH, Sambhi MP, Rosoff L: Hemodynamic studies on clinical shock associated with infection. Am J Med. 1963, 34: 461-469. 10.1016/0002-9343(63)90068-8.
Weil MH: Current concepts on the management of shock. Circulation. 1957, 16: 1097-1105. 10.1161/01.CIR.16.6.1097.
Vincent JL, Weil MH: Fluid challenge revisited. Crit Care Med. 2006, 34: 1333-1337. 10.1097/01.CCM.0000214677.76535.A5.
Weil MH, Henning RJ: New concepts in the diagnosis and fluid treatment of circulatory shock. Thirteenth annual Becton, Dickinson and Company Oscar Schwidetsky Memorial Lecture. Anesth Analg. 1979, 58: 124-132.
Weil MH, Shubin H, Rosoff L: Fluid repletion in circulatory shock: central venous pressure and other practical guides. JAMA. 1965, 192: 668-674. 10.1001/jama.1965.03080210012003.
Shoemaker WC: Comparison of the relative effectiveness of whole blood transfusions and various types of fluid therapy in resuscitation. Crit Care Med. 1976, 4: 71-78. 10.1097/00003246-197603000-00006.
Shoemaker WC: Evaluation of colloids, crystalloids, whole blood, and red cell therapy in the critically ill patient. Clin Lab Med. 1982, 2: 35-63.
Shoemaker WC, Hopkins JA, Greenfield S, Chang PC, Umof P, Shabot MM, Spenler CW, State D: Resuscitation algorithm for management of acute emergencies. JACEP. 1978, 7: 361-367. 10.1016/S0361-1124(78)80225-1.
Muller L, Toumi M, Bousquet PJ, Riu-Poulenc B, Louart G, Candela D, Zoric L, Suehs C, de La Coussaye JE, Molinari N, Lefrant JY, AzuRéa Group: An increase in aortic blood flow after an infusion of 100 ml colloid over 1 minute can predict fluid responsiveness: the mini-fluid challenge study. Anesthesiology. 2011, 115: 541-547. 10.1097/ALN.0b013e318229a500.
Dellinger RP, Carlet JM, Masur H, Gerlach H, Calandra T, Cohen J, Gea-Banacloche J, Keh D, Marshall JC, Parker MM, Ramsay G, Zimmerman JL, Vincent JL, Levy MM: Surviving Sepsis Campaign guidelines for management of severe sepsis and septic shock. Intensive Care Med. 2004, 30: 536-555. 10.1007/s00134-004-2398-y.
Dellinger RP, Levy MM, Carlet JM, Bion J, Parker MM, Jaeschke R, Reinhart K, Angus DC, Brun-Buisson C, Beale R, Calandra T, Dhainaut JF, Gerlach H, Harvey M, Marini JJ, Marshall J, Ranieri M, Ramsay G, Sevransky J, Thompson BT, Townsend S, Vender JS, Zimmerman JL, Vincent JL, International Surviving Sepsis Campaign Guidelines Committee; American Association of Critical-Care Nurses; American College of Chest Physicians; American College of Emergency Physicians; Canadian Critical Care Society; European Society of Clinical Microbiology and Infectious Diseases, et al: Surviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 200. Crit Care Med. 2008, 36: 296-327. 10.1097/01.CCM.0000298158.12101.41.
Dellinger RP, Levy MM, Rhodes A, Annane D, Gerlach H, Opal SM, Sevransky JE, Sprung CL, Douglas IS, Jaeschke R, Osborn TM, Nunnally ME, Townsend SR, Reinhart K, Kleinpell RM, Angus DC, Deutschman CS, Machado FR, Rubenfeld GD, Webb SA, Beale RJ, Vincent JL, Moreno R, Surviving Sepsis Campaign Guidelines Committee including the Pediatric Subgroup: Surviving Sepsis Campaign: International guidelines for management of severe sepsis and septic shock: 2012. Crit Care Med. 2013, 41: 580-637. 10.1097/CCM.0b013e31827e83af.
McLuckie A: Shock - an overview. Oh’s Intensive Care Manual. Edited by: Bersten AD. 2009, Elsevier Limited, Philadelphia, 97-104. 10.1016/B978-0-7020-3096-3.00011-7. 6
Hilton AK, Bellomo R: A critique of fluid bolus resuscitation in severe sepsis. Crit Care. 2012, 16: 302-10.1186/cc11154.
Axler O, Tousignant C, Thompson CR, Dalla’va-Santucci J, Drummond A, Phang PT, Russell JA, Walley KR: Small hemodynamic effect of typical rapid volume infusions in critically ill patients. Crit Care Med. 1997, 25: 965-970. 10.1097/00003246-199706000-00012.
Bouchard J, Soroko SB, Chertow GM, Himmelfarb J, Ikizler TA, Paganini EP, Mehta RL, Program to Improve Care in Acute Renal Disease (PICARD) Study Group: Fluid accumulation, survival and recovery of kidney function in critically ill patients with acute kidney injury. Kidney Int. 2009, 76: 422-427. 10.1038/ki.2009.159.
Finfer S, Bellomo R, Boyce N, French J, Myburgh J, Norton R, Safe Study Investigators: A comparison of albumin and saline for fluid resuscitation in the intensive care unit. N Engl J Med. 2004, 350: 2247-2256. 10.1056/NEJMoa040232.
Finfer S, McEvoy S, Bellomo R, McArthur C, Myburgh J, Norton R: Impact of albumin compared to saline on organ function and mortality of patients with severe sepsis. Intensive Care Med. 2011, 37: 86-96. 10.1007/s00134-010-2081-4.
Grams ME, Estrella MM, Coresh J, Brower RG, Liu KD, National Heart, Lung, and Blood Institute Acute Respiratory Distress Syndrome Network: Fluid balance, diuretic use, and mortality in acute kidney injury. Clin J Am Soc Nephrol. 2011, 6: 966-973. 10.2215/CJN.08781010.
Heart N, Wiedemann HP, Wheeler AP, Bernard GR, Thompson BT, Hayden D, deBoisblanc B, Connors AF, Hite RD, Harabin AL, Lung, and Blood Institute Acute Respiratory Distress Syndrome (ARDS) Clinical Trials Network: Comparison of two fluid-management strategies in acute lung injury. N Engl J Med. 2006, 354: 2564-2575. 10.1056/NEJMoa062200.
Berg S, Engman A, Hesselvik JF, Laurent TC: Crystalloid infusion increases plasma hyaluronan. Crit Care Med. 1994, 22: 1563-1567. 10.1097/00003246-199410000-00010.
Berg S, Golster M, Lisander B: Albumin extravasation and tissue washout of hyaluronan after plasma volume expansion with crystalloid or hypooncotic colloid solutions. Acta Anaesthesiol Scand. 2002, 46: 166-172. 10.1034/j.1399-6576.2002.460207.x.
Steppan J, Hofer S, Funke B, Brenner T, Henrich M, Martin E, Weitz J, Hofmann U, Weigand MA: Sepsis and major abdominal surgery lead to flaking of the endothelial glycocalix. J Surg Res. 2011, 165: 136-141. 10.1016/j.jss.2009.04.034.
Burke-Gaffney A, Evans TW: Lest we forget the endothelial glycocalyx in sepsis. Crit Care. 2012, 16: 121-10.1186/cc11239.
Woodcock TE, Woodcock TM: Revised Starling equation and the glycocalyx model of transvascular fluid exchange: an improved paradigm for prescribing intravenous fluid therapy. Br J Anaesth. 2012, 108: 384-394. 10.1093/bja/aer515.
Hilton AK, Bellomo R: Totem and taboo: fluids in sepsis. Crit Care. 2011, 15: 164-10.1186/cc10247.
Reade MC, Huang DT, Bell D, Coats TJ, Cross AM, Moran JL, Peake SL, Singer M, Yealy DM, Angus DC, British Association for Emergency Medicine; UK Intensive Care Society; UK Society for Acute Medicine; Australasian Resuscitation in Sepsis Evaluation Investigators; Protocolized Care for Early Septic Shock Investigators: Variability in management of early severe sepsis. Emerg Med J. 2010, 27: 110-115. 10.1136/emj.2008.070912.
Bihari S, Prakash S, Bersten AD: Post resusicitation fluid boluses in severe sepsis or septic shock: prevalence and efficacy (price study). Shock. 2013, 40: 28-34. 10.1097/SHK.0b013e31829727f1.
Castellanos-Ortega A, Suberviola B, Garcia-Astudillo LA, Holanda MS, Ortiz F, Llorca J, Delgado-Rodriguez M: Impact of the Surviving Sepsis Campaign protocols on hospital length of stay and mortality in septic shock patients: results of a three-year follow-up quasi-experimental study. Crit Care Med. 2010, 38: 1036-1043. 10.1097/CCM.0b013e3181d455b6.
De Backer D, Biston P, Devriendt J, Madl C, Chochrad D, Aldecoa C, Brasseur A, Defrance P, Gottignies P, Vincent JL, SOAP II Investigators: Comparison of dopamine and norepinephrine in the treatment of shock. N Engl J Med. 2010, 362: 779-789. 10.1056/NEJMoa0907118.
Dong ZZ, Fang Q, Zheng X, Shi H: Passive leg raising as an indicator of fluid responsiveness in patients with severe sepsis. World J Emerg Med. 2012, 3: 191-196. 10.5847/wjem.j.issn.1920-8642.2012.03.006.
Freitas FGR, Bafi AT, Nascente APM, Assuncao M, Mazza B, Azevedo LCP, Machado FR, Mahajan RP: Predictive value of pulse pressure variation for fluid responsiveness in septic patients using lung-protective ventilation strategies. Br J Anaesth. 2013, 110: 402-408. 10.1093/bja/aes398.
Gaieski DF, Mikkelsen ME, Band RA, Pines JM, Massone R, Furia FF, Shofer FS, Goyal M: Impact of time to antibiotics on survival in patients with severe sepsis or septic shock in whom early goal-directed therapy was initiated in the emergency department. Crit Care Med. 2010, 38: 1045-1053. 10.1097/CCM.0b013e3181cc4824.
Hamzaoui O, Georger JF, Monnet X, Ksouri H, Maizel J, Richard C, Teboul JL: Early administration of norepinephrine increases cardiac preload and cardiac output in septic patients with life-threatening hypotension. Crit Care. 2010, 14: R142-10.1186/cc9207.
Hanzelka KM, Yeung SC, Chisholm G, Merriman KW, Gaeta S, Malik I, Rice TW: Implementation of modified early-goal directed therapy for sepsis in the emergency center of a comprehensive cancer center. Support Care Cancer. 2013, 21: 727-734. 10.1007/s00520-012-1572-y.
Jacob ST, Banura P, Baeten JM, Moore CC, Meya D, Nakiyingi L, Burke R, Horton CL, Iga B, Wald A, Reynolds SJ, Mayanja-Kizza H, Scheld WM, Promoting Resource-Limited Interventions for Sepsis Management in Uganda Study Group: The impact of early monitored management on survival in hospitalized adult Ugandan patients with severe sepsis: a prospective intervention study. Crit Care Med. 2012, 40: 2050-2058. 10.1097/CCM.0b013e31824e65d7.
Khwannimit B, Bhurayanontachai R: Prediction of fluid responsiveness in septic shock patients: comparing stroke volume variation by FloTrac/Vigileo and automated pulse pressure variation. Eur J Anaesthesiol. 2012, 29: 64-69. 10.1097/EJA.0b013e32834b7d82.
Lakhal K, Ehrmann S, Perrotin D, Wolff M, Boulain T: Fluid challenge: tracking changes in cardiac output with blood pressure monitoring (invasive or non-invasive). Intensive Care Med. 2013, 39: 1953-1962. 10.1007/s00134-013-3086-6.
Lanspa MJ, Brown SM, Hirshberg EL, Jones JP, Grissom CK: Central venous pressure and shock index predict lack of hemodynamic response to volume expansion in septic shock: a prospective, observational study. J Crit Care. 2012, 27: 609-615. 10.1016/j.jcrc.2012.07.021.
Machare-Delgado E, Decaro M, Marik PE: Inferior vena cava variation compared to pulse contour analysis as predictors of fluid responsiveness: a prospective cohort study. J Intensive Care Med. 2011, 26: 116-124. 10.1177/0885066610384192.
MacRedmond R, Hollohan K, Stenstrom R, Nebre R, Jaswal D, Dodek P: Introduction of a comprehensive management protocol for severe sepsis is associated with sustained improvements in timeliness of care and survival. Qual Saf Health Care. 2010, 19: e46-
Mahjoub Y, Benoit-Fallet H, Airapetian N, Lorne E, Levrard M, Seydi AA, Amennouche N, Slama M, Dupont H: Improvement of left ventricular relaxation as assessed by tissue Doppler imaging in fluid-responsive critically ill septic patients. Intensive Care Med. 2012, 38: 1461-1470. 10.1007/s00134-012-2618-9.
McIntyre LA, Fergusson DA, Cook DJ, Rowe BH, Bagshaw SM, Easton D, Emond M, Finfer S, Fox-Robichaud A, Gaudert C, Green R, Hebert P, Marshall J, Rankin N, Stiell I, Tinmouth A, Pagliarello J, Turgeon AF, Worster A, Zarychanski R, Canadian Critical Care Trials Group: Fluid resuscitation with 5% albumin versus normal saline in early septic shock: a pilot randomized, controlled trial. J Crit Care. 2012, 27: 317.e311-317.e316. 10.1016/j.jcrc.2011.10.007.
Monnet X, Anguel N, Naudin B, Jabot J, Richard C, Teboul J: Arterial pressure-based cardiac output in septic patients: different accuracy of pulse contour and uncalibrated pressure waveform devices. Crit Care. 2010, 14: R109-10.1186/cc9058.
Monnet X, Jabot J, Maizel J, Richard C, Teboul JL: Norepinephrine increases cardiac preload and reduces preload dependency assessed by passive leg raising in septic shock patients. Crit Care Med. 2011, 39: 689-694. 10.1097/CCM.0b013e318206d2a3.
Monnet X, Julien F, Ait-Hamou N, Lequoy M, Gosset C, Jozwiak M, Persichini R, Anguel N, Richard C, Teboul JL: Lactate and venoarterial carbon dioxide difference/arterial-venous oxygen difference ratio, but not central venous oxygen saturation, predict increase in oxygen consumption in fluid responders. Crit Care Med. 2013, 41: 1412-1420. 10.1097/CCM.0b013e318275cece.
Monnet X, Letierce A, Hamzaoui O, Chemla D, Anguel N, Osman D, Richard C, Teboul JL: Arterial pressure allows monitoring the changes in cardiac output induced by volume expansion but not by norepinephrine. Crit Care Med. 2011, 39: 1394-1399. 10.1097/CCM.0b013e31820edcf0.
O’Neill R, Morales J, Jule M: Early goal-directed therapy (EGDT) for severe sepsis/septic shock: which components of treatment are more difficult to implement in a community-based emergency department?. J Emerg Med. 2012, 42: 503-510. 10.1016/j.jemermed.2011.03.024.
Ospina-Tascon G, Neves AP, Occhipinti G, Donadello K, Büchele G, Simion D, Chierego ML, Silva TO, Fonseca A, Vincent JL, De Backer D: Effects of fluids on microvascular perfusion in patients with severe sepsis. Intensive Care Med. 2010, 36: 949-955. 10.1007/s00134-010-1843-3.
Patel GW, Roderman N, Gehring H, Saad J, Bartek W: Assessing the effect of the Surviving Sepsis Campaign treatment guidelines on clinical outcomes in a community hospital. Ann Pharmacother. 2010, 44: 1733-1738. 10.1345/aph.1P251.
Pierrakos C, Velissaris D, Scolletta S, Heenen S, De Backer D, Vincent JL: Can changes in arterial pressure be used to detect changes in cardiac index during fluid challenge in patients with septic shock?. Intensive Care Med. 2012, 38: 422-428. 10.1007/s00134-011-2457-0.
Pottecher J, Deruddre S, Teboul JL, Georger JF, Laplace C, Benhamou D, Vicaut E, Duranteau J: Both passive leg raising and intravascular volume expansion improve sublingual microcirculatory perfusion in severe sepsis and septic shock patients. Intensive Care Med. 2010, 36: 1867-1874. 10.1007/s00134-010-1966-6.
Sanchez M, Jimenez-Lendinez M, Cidoncha M, Asensio MJ, Herrero E, Collado A, Santacruz M: Comparison of fluid compartments and fluid responsiveness in septic and non-septic patients. Anaesth Intensive Care. 2011, 39: 1022-1029.
Schnell D, Camous L, Guyomarc’h S, Duranteau J, Canet E, Gery P, Dumenil AS, Zeni F, Azoulay E, Darmon M: Renal perfusion assessment by renal Doppler during fluid challenge in sepsis. Crit Care Med. 2013, 41: 1214-1220. 10.1097/CCM.0b013e31827c0a36.
Sturgess DJ, Pascoe RLS, Scalia G, Venkatesh B: A comparison of transcutaneous Doppler corrected flow time, b-type natriuretic peptide and central venous pressure as predictors of fluid responsiveness in septic shock: a preliminary evaluation. Anaesth Intensive Care. 2010, 38: 336-341.
Trof RJ, Beishuizen A, Cornet AD, Wit RJ, Girbes AR, Groeneveld AB: Volume-limited versus pressure-limited hemodynamic management in septic and nonseptic shock. Crit Care Med. 2012, 40: 1177-1185. 10.1097/CCM.0b013e31823bc5f9.
van Haren FMP, Sleigh J, Boerma EC, La Pine M, Bahr M, Pickkers P, Van Der Hoeven JG: Hypertonic fluid administration in patients with septic shock: a prospective randomized controlled pilot study. Shock. 2012, 37: 268-275. 10.1097/SHK.0b013e31823f152f.
Wacharasint P, Lertamornpong A, Wattanathum A, Wongsa A: Predicting fluid responsiveness in septic shock patients by using 3 dynamic indices: is it all equally effective?. J Med Assoc Thai. 2012, 95: S149-S156.
Yu M, Pei K, Moran S, Edwards KD, Domingo S, Steinemann S, Ghows M, Takiguchi S, Tan A, Lurie F, Takanishi D: A prospective randomized trial using blood volume analysis in addition to pulmonary artery catheter, compared with pulmonary artery catheter alone, to guide shock resuscitation in critically ill surgical patients. Shock. 2011, 35: 220-228. 10.1097/SHK.0b013e3181fc9178.
Zhang Z, Lu B, Ni H, Sheng X, Jin N: Prediction of pulmonary edema by plasma protein levels in patients with sepsis. J Crit Care. 2012, 27: 623-629. 10.1016/j.jcrc.2012.08.007.
Marik PE, Lemson J: Fluid responsiveness: an evolution of our understanding. Br J Anaesth. 2014, 112: 617-620. 10.1093/bja/aet590.
Marik PE, Cavallazzi R: Does the central venous pressure predict fluid responsiveness? An updated meta-analysis and a plea for some common sense. Crit Care Med. 2013, 41: 1774-1781. 10.1097/CCM.0b013e31828a25fd.
Payen D, de Pont AC, Sakr Y, Spies C, Reinhart K, Vincent JL: Sepsis Occurrence in Acutely Ill Patients Investigators: A positive fluid balance is associated with a worse outcome in patients with acute renal failure. Crit Care. 2008, 12: R74-10.1186/cc6916.
Calvin JE, Driedger AA, Sibbald WJ: The hemodynamic effect of rapid fluid infusion in critically ill patients. Surgery. 1981, 90: 61-76.
Perner A, Faber T: Stroke volume variation does not predict fluid responsiveness in patients with septic shock on pressure support ventilation. Acta Anaesthesiol Scand. 2006, 50: 1068-1073. 10.1111/j.1399-6576.2006.01120.x.
Sakka SG, Meier-Hellmann A, Reinhart K: Do fluid administration and reduction in norepinephrine dose improve global and splanchnic haemodynamics?. Br J Anaesth. 2000, 84: 758-762. 10.1093/oxfordjournals.bja.a013589.
Shoemaker WC, Schluchter M, Hopkins JA, Appel PL, Schwartz S, Chang PC: Comparison of the relative effectiveness of colloids and crystalloids in emergency resuscitation. Am J Surg. 1981, 142: 73-84. 10.1016/S0002-9610(81)80015-3.
The authors declare that they have no competing interests.
Electronic supplementary material
Additional file 1: Electronic Supplement. Containing: Appendix 1 (Electronic Search Strategies); Table S1: Study inclusion criteria, definitions of sepsis and definitions of hyperlactataemia; Table S2: Physiological effects grouped by intervention type and comparison; Table S3: Physiological effects grouped by speed of FBT delivery; Table S4: Physiological effects of FBT grouped by fluid class. (DOCX 224 KB)
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Glassford, N.J., Eastwood, G.M. & Bellomo, R. Physiological changes after fluid bolus therapy in sepsis: a systematic review of contemporary data. Crit Care 18, 696 (2014). https://doi.org/10.1186/s13054-014-0696-5
- Septic Shock
- Severe Sepsis
- Cardiac Index
- Continuous Renal Replacement Therapy
- Fluid Responsiveness