***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: Introduction Inadequate initial treatment and delayed hemodynamic stabilization ( HDS ) may be associated with increased risk of death in severe sepsis patients . Methods In order to compare the hemodynamic efficacy and safety of 6 % HES 130/0.4 and NaCl 0.9 % for HDS in patients with severe sepsis , we design ed a prospect i ve , multicenter , active-controlled , double-blind , r and omized study in intensive care units . Results 174 out of 196 patients reached HDS ( 88 and 86 patients for HES and NaCl , respectively ) . Significantly less HES was used to reach HDS vs. NaCl ( 1,379 ±886 ml in the HES group and 1,709 ±1,164 ml in the NaCl group ( mean difference = -331± 1,033 , 95 % CI -640 to -21 , P = 0.0185 ) . Time to reach HDS was 11.8 10.1 hours vs. 14.3 ±11.1 hours for HES and NaCl , respectively . Total quantity of study drug infused over four consecutive days , ICU and hospital LOS , and area under the curve of SOFA score were comparable . Acute renal failure occurred in 24 ( 24.5 % ) and 19 ( 20 % ) patients for HES and NaCl , respectively ( P = 0.454 ) . There was no difference between AKIN and RIFLE criteria among groups and no difference in mortality , coagulation , or pruritus up to 90 days after treatment initiation . Conclusion Significantly less volume was required to achieve HDS for HES vs. NaCl in the initial phase of fluid resuscitation in severe sepsis patients without any difference for adverse events in both groups . Clinical Trials.gov To assess the effects of crystalloid and colloid resuscitation on hemodynamic response and on lung water  following thermal injury , 79 patients were assigned r and omly to receive lactated Ringer 's solution or 2.5 % albumin-lactated Ringer 's solution . Crystalloid-treated patients required more fluid for successful resuscitation than did those receiving colloid solutions ( 3.81 vs. 2.98 ml/kg body weight/% body surface burn , p < 0.01 ) . In study phase 1 ( 29 patients ) , cardiac index and myocardial contractility ( ejection fraction ' and mean rate of internal fiber shortening , Vcf ) were determined by echocardiography during the first 48 hours postburn . Cardiac index was lower in the 12-to 24-hour postburn interval in the crystalloid group , but this difference between treatment groups had disappeared by 48 hours postburn . Ejection fractions were normal throughout the entire study , while Vcf was supranormal ( p < 0.01 vs. normals ) and equal in the two resuscitation groups . In study phase 2 ( SO patients ) , extravascular lung water and cardiac index were measured by a st and ard rebreathing technique at least daily for the first postburn week . Lung water remained unchanged in the crystalloid-treated patients ( p > 0.10 ) , but progressively increased in the colloid-treated patients over the seven day study ( p < 0.0001 ) . The measured lung water in each treatment group was significantly different from one another ( p < 0.001 ) . Cardiac index increased progressively and identically in both treatment groups over the study period ( p < 0.01 ) . These data refute the existence of myocardial depression during postburn resuscitation and document hypercontractile left ventricular performance . The addition of colloid to crystalloid resuscitation fluids produces no long lasting benefit on total body blood flow , and promotes accumulation of lung water when edema fluid is being reabsorbed from the burn wound Abstract . The objective of this study was to compare the cardiac and hemodynamic responses to a rapid infusion of 1000 ml of modified fluid gelatin ( group A ) or 1000 ml of lactated Ringer 's solution ( group B ) in emergency room patients suffering from shock . This prospect i ve , r and omized , open , noncrossover study was performed at a medical center university hospital in a surgical resuscitation room in the emergency department . The subjects were 34 patients with either hypovolemic or neurogenic shock who were admitted to the emergency room . A resuscitation protocol according to Advanced Trauma Life Support ( ATLS ) with an additional central venous line or Swan-Ganz catheters for hemodynamic monitoring was used . Physical parameters and hemodynamic variables were measured at baseline and 15 minutes , 30 minutes , and 1 hour after the infusion of each fluid . In both groups the mean arterial blood pressure ( MAP ) , systolic and diastolic pressure , central venous pressure ( CVP ) , and pulmonary artery occlusion pressure ( PAOP ) increased significantly . The CVP and PAOP increased significantly more in the modified fluid gelatin resuscitation group . In patients with traumatic or neurogenic shock due to acute volume deficiency , there was significantly better hemodynamic improvement , judged by CVP and PAOP measurements using the modified fluid gelatin for volume replacement than with lactated Ringer 's solution during the first hour of resuscitation PURPOSE The aim of this study was to show that 6 % hydroxyethyl starch ( HES ) 130/0.4 achieves a better resuscitation of the microcirculation than normal saline solution ( SS ) , during early goal -directed therapy ( EGDT ) in septic patients . MATERIAL S AND METHODS Patients with severe sepsis were r and omized for  EGDT  with 6 % HES 130/0.4 ( n = 9 ) or SS ( n = 11 ) . Sublingual microcirculation was evaluated by sidestream dark field imaging 24 hours after the beginning of EGDT . RESULTS On admission , there were no differences in Sequential Organ Failure Assessment score , mean arterial pressure , lactate , or central venous oxygen saturation . After 24 hours , no difference arose in those parameters . Sublingual capillary density was similar in both groups ( 21 ± 8 versus 20 ± 3 vessels/mm(2 ) ) ; but capillary microvascular flow index , percent of perfused capillaries , and perfused capillary density were higher in 6 % HES 130/0.4 ( 2.5 ± 0.5 versus 1.6 ± 0.7 , 84 ± 15 versus 53 ± 26 % , and 19 ± 6 versus 11 ± 5 vessels/mm(2 ) , respectively , P < .005 ) . CONCLUSIONS Fluid resuscitation with 6 % HES 130/0.4 may have advantages over SS to improve sublingual microcirculation . A greater number of patients would be necessary to confirm these findings Background : It is unknown whether fluid resuscitation with colloid or crystalloid in patients with severe sepsis or septic shock is associated with an improvement in clinical outcome . This r and omized controlled trial determined the feasibility of conducting a large trial testing resuscitation with pentastarchvs normal saline in early septic shock , powered for a difference in mortality . Methods : At three Canadian and one New Zeal and academic centre , 40 patients with early septic shock defined by at least two systemic inflammatory response syndrome criteria , infectious source , and persistent hypotension after ≥ 1 L of crystalloid fluid were recruited . Feasibility measures were patient recruitment , blinding of the study fluids , and acceptability of the goal directed algorithms . Boluses of blinded normal saline or pentastarch ( 500 mL − maximum 3 L or 28 mL·kg−1 ) were administered within goal directed care for the first 12 hr . Results : Of 161 patients screened , 121 were excluded and 40 patients were enrolled , for a recruitment rate of 0.75 patients / site/month . Only 57 % of physicians and 54 % of nurses correctly guessed the study fluid ( P = 0.46 and P = 0.67 , respectively ) . The goal directed algorithms were acceptable to 97 % of physicians . Conclusion : The ability to recruit patients in this pilot r and omized controlled trial was below expectations . Blinding of study fluids was adequate , and resuscitation algorithms were acceptable to most physicians . Methods to improve recruitment are required to enhance the feasibility of conducting a multicentre fluid resuscitation trial in early septic shock . Résumé Context e : Nous ne savons pas si la réanimation liquidienne avec des colloïdes ou des cristalloïdes chez les patients présentant un sepsis grave ou un choc septique est associée à un devenir clinique meilleur . Cette étude r and omisée contrôlée a déterminé la faisabilité d’une étude d’envergure testant la réanimation avec le pentastarch par rapport au sérum physiologique en début de choc septique , avec pour objectif primaire de détecter une différence dans les taux de mortalité . Method e : Quarante patients en début de choc septique , défini comme au moins deux critères du syndrome de réaction inflammatoire , une source d’infection et une hypotension persistante après ≥ 1 L de cristalloïde ont été recrutés dans trois centres universitaires canadiens et un centre néo-zél and ais . Les mesures de faisabilite étaient : le recrutement des patients , le masquage des liquides à l’étude , et I’acceptabilité des algorithmes dirigés vers des objectifs . Des bolus de normal sal in ou de pentastarch ( 500 mL — maximum 3 L ou 28 mL·kg−1 ) ont été administrés en aveugle dans le cadre de soins guidés dirigés vers des objectifs durant les 12 premieres heures . Result ats : Sur 161 patients dépistés , 121 ont été exclus et 40 patients recrutés dans le cadre de I’étude , avec un taux de recrutement de 0,75 patient/site/mois . Seulement 57 % des médecins et 54 % des infirmières ont réussi à deviner correctement le type de liquide à I’étude ( P = 0,46 etP = 0,67 , respectivement ) . Les algorithmes ont été jugés acceptables par 97 % des médecins . Conclusion : La capacité à recruter des patients pour cette étude pilote r and omisée contrôlée était moins importante qu’attendue . Le masquage des liquides était satisfaisant , et les algorithmes de réanimation ont été jugés acceptables par la majorité des médecins . Des méthodes dans le but d’améliorer le recrutement sont nécessaire pour accroître la faisabilité d’une étude multicentrique sur la réanimation liquidienne en début de choc septique BACKGROUND It remains uncertain whether the choice of resuscitation fluid for patients in intensive care units ( ICUs ) affects survival . We conducted a multicenter , r and omized , double-blind trial to compare the effect of fluid resuscitation with albumin or saline on mortality in a heterogeneous population of patients in the ICU . METHODS We r and omly assigned patients who had been admitted to the ICU to receive either 4 percent albumin or normal saline for intravascular-fluid resuscitation during the next 28 days . The primary outcome measure was death from any cause during the 28-day period after r and omization . RESULTS Of the 6997 patients who underwent r and omization , 3497 were assigned to receive albumin and 3500 to receive saline ;  the two groups had similar baseline characteristics . There were 726 deaths in the albumin group , as compared with 729 deaths in the saline group ( relative risk of death , 0.99 ; 95 percent confidence interval , 0.91 to 1.09 ; P=0.87 ) . The proportion of patients with new single-organ and multiple-organ failure was similar in the two groups ( P=0.85 ) . There were no significant differences between the groups in the mean ( + /-SD ) numbers of days spent in the ICU ( 6.5+/-6.6 in the albumin group and 6.2+/-6.2 in the saline group , P=0.44 ) , days spent in the hospital ( 15.3+/-9.6 and 15.6+/-9.6 , respectively ; P=0.30 ) , days of mechanical ventilation ( 4.5+/-6.1 and 4.3+/-5.7 , respectively ; P=0.74 ) , or days of renal-replacement therapy ( 0.5+/-2.3 and 0.4+/-2.0 , respectively ; P=0.41 ) . CONCLUSIONS In patients in the ICU , use of either 4 percent albumin or normal saline for fluid resuscitation results in similar outcomes at 28 days Hypertonic solutions effectively improve hemodynamic parameters in patients admitted to the emergency room . However , no significant differences in outcome were observed compared with st and ard isotonic treatment in most previously published studies . This study evaluates pretreatment prognostic factors that predict a beneficial effect of hypertonic solution in patients admitted to the emergency room with hemorrhagic hypovolemia in a prospect i ve double-blind fashion . The patients ( n = 212 ) were r and omized upon admission to receive 250 mL intravenous ( i.v . ) bolus of hypertonic 7.5 % NaCl + 6 % dextran ( HSD , n = 101 ) , or isotonic 0.9 % NaCl solutions ( IS , n = 111 ) as the first treatment , followed by st and ard resuscitation . Pretreatment factors assessed were sex , age , cause of hypovolemia , revised trauma score ( RTS ) , Glasgow index , and mean arterial pressure ( MAP ) on admission . Both 
    Output:
    
Conclusions : Crystalloids were less efficient  than colloids at stabilizing resuscitation endpoints ; guidance on when to switch is urgently required .
HIGHLIGHTSCrystalloids are less effective  than colloids at stabilizing hemodynamic endpoints .
There is an urgent need for guidance on when to switch to colloids in the ICU.Higher volumes of crystalloids are required in the ICU , compared with colloids