Crystalloid Fluid Bolus Research Articles

CCRN Across the Life Span.

CCRN Across the Life Span.

Ward-based Goal-Directed Fluid Therapy (GDFT) in Acute Pancreatitis (GAP) trial: study protocol for a feasibility randomised controlled trial

IntroductionAcute pancreatitis is an inflammatory disease of the pancreas with high risk of developing multiorgan failure and death. There are no effective pharmacological interventions used in current clinical practice. Maintaining...

Impact of balanced versus unbalanced fluid resuscitation on clinical outcomes in critically ill children: protocol for a systematic review and meta-analysis

BackgroundIsotonic crystalloid fluid bolus therapy is used in critically ill children to restore or maintain hemodynamic stability. However, the ideal choice of crystalloid remains to be determined. The most easily available and most frequently used crystalloid is 0.9% saline, an unbalanced crystalloid, that has been associated with hyperchloremic metabolic acidosis and acute kidney injury (AKI). Balanced fluids such as Ringer’s lactate (RL) were developed to be closer to the composition of serum. However, they are more expensive and less readily available than 0.9% saline. Few trials have found RL to be associated with more favorable outcomes, but pediatric data is limited and inconsistent. The objective of the present systematic review is to review existing literature to determine the effect of balanced versus unbalanced fluid bolus therapy on metabolic acidosis in critically ill children.MethodsUsing the Preferred Reporting Items for Systematic Review and Meta-analysis Protocols (PRISMA-P) guidelines, we will conduct a systematic review to retrieve all controlled trials and observational studies comparing balanced and unbalanced resuscitative fluids in critically ill children from age 28 days to 18 years old in any resuscitation settings. Search strategy was developed in collaboration with an experienced clinical research librarian. The primary outcome is the incidence and/or time to resolution of metabolic acidosis. Secondary outcomes included the incidence of hyperchloremia, AKI, duration of renal replacement therapy, vasopressors, mechanical ventilation, total volume of rehydration needed per day, extracorporeal membrane oxygenation, and length of stay and mortality. Study screening, inclusion, data extraction, and assessment of risk of bias will be performed independently by two authors. We intend to perform a meta-analysis with studies that are compatible on the basis of population and outcomes.DiscussionIsotonic crystalloid fluid bolus therapy is a ubiquitous treatment in resuscitation of critically ill pediatric patients and yet there is no clear recommendation to support the choice of balanced versus unbalanced fluid. The present review will summarize current available data in the literature and assess whether recommendations can be generated regarding the choice of crystalloids or otherwise identify knowledge gaps which will open the door to a large-scale randomized controlled trial (RCT).

20% Human Albumin Solution Fluid Bolus Administration Therapy in Patients After Cardiac Surgery (the HAS FLAIR Study)

To compare the effects of fluid bolus therapy using 20% albumin versus crystalloid on fluid balance, hemodynamic parameters, and intensive care unit (ICU) treatment effects in post-cardiac surgery patients. Sequential period open-label pilot study. University teaching hospital. One hundred adult cardiac surgery patients who were prescribed fluid bolus therapy to correct hypotension or perceived hypovolemia or to optimize cardiac index during the first 24 hours in the ICU. The first 50 patients were treated with crystalloid fluid bolus therapy in the first period (control), and 50 patients with up to 2 treatments of 100 mL of 20% albumin fluid bolus therapy in the second period (intervention), followed by crystalloid therapy if needed. Demographic characteristics were similar at baseline. The intervention was associated with a less positive median fluid balance in the first 24 hours (albumin: 1,100 [650-1,960] v crystalloid: 1,970 [1,430-2,550] p = 0.001), fewer episodes of fluid bolus therapy (3 [2-5] v 5 [4-7]; p < 0.0001) and a lesser volume of fluid bolus therapy (700 [200-1,450] v 1,500 mL/24 h [1,100-2,250]; p < 0.0001). The intervention also was associated with a decreased median overall dose of norepinephrine in the first 24 hours of ICU stay (19 [0-52] v 47 µg/kg/24 hours [0-134]; p = 0.025) and shorter median time to cessation of norepinephrine (17 [5-28] v 28 hours [20-48]; p = 0.002). Post-cardiac surgery fluid bolus therapy with 20% albumin when compared with crystalloid fluid resulted in less positive fluid balance as well as several hemodynamic and potential ICU treatment advantages.

Pre-clinical study protocol: Blood transfusion in endotoxaemic shock

The Surviving Sepsis Campaign (SCC) and the American College of Critical Care Medicine (ACCM) guidelines recommend blood transfusion in sepsis when the haemoglobin concentration drops below 7.0 g/dL and 10.0 g/dL respectively, while the World Health Organisation (WHO) guideline recommends transfusion in septic shock ‘if intravenous (IV) fluids do not maintain adequate circulation’, as a supportive measure of last resort. Volume expansion using crystalloid and colloid fluid boluses for haemodynamic resuscitation in severe illness/sepsis, has been associated with adverse outcomes in recent literature. However, the volume expansion effect(s) following blood transfusion for haemodynamic circulatory support, in severe illness remain unclear with most previous studies having focused on evaluating effects of either different RBC storage durations (short versus long duration) or haemoglobin thresholds (low versus high threshold) pre-transfusion.•We describe the protocol for a pre-clinical randomised controlled trial designed to examine haemodynamic effect(s) of early volume expansion using packed RBCs (PRBCs) transfusion (before any crystalloids or colloids) in a validated ovine-model of hyperdynamic endotoxaemic shock.•Additional exploration of mechanisms underlying any physiological, haemodynamic, haematological, immunologic and tissue specific-effects of blood transfusion will be undertaken including comparison of effects of short (≤5 days) versus long (≥30 days) storage duration of PRBCs prior to transfusion.

Smith\u2013Lemli\u2013Opitz syndrome presenting as acute adrenal crisis in a child: a case report

BackgroundSmith–Lemli–Opitz syndrome is a rare autosomal recessive disorder of cholesterol biosynthesis which is characterized by multiple congenital malformations and global developmental delay. Here we report the case of a 3-year-old, previously undiagnosed, child with Smith–Lemli–Opitz syndrome presenting with acute adrenal crisis, which is an extremely rare and atypical presentation of this disease.Case presentationA 3-year-old Sri Lankan Sinhalese boy without evidence of infection presented with circulatory collapse. He had a normal perinatal period; however, his early infancy was complicated by poor feeding, episodes of loose stools, failure to thrive, and several episodes of unexplained drowsiness. His weight, height, and occipitofrontal circumference were well below the third percentile. He had soft dysmorphic features that included microcephaly, bitemporal narrowing, upward slanting eyes, epicanthal folds, partial ptosis, broad nasal bridge, low set posteriorly rotated ears, high arched palate, and short neck. Marked hyperpigmentation was noted in perioral, buccal, and palmar areas. His pulses were rapid and low in volume and his systolic blood pressure was low. Initial resuscitation was performed by administering multiple crystalloid fluid boluses. A septic screen was negative. His blood glucose and serum bicarbonate levels were low and serum electrolytes revealed hyponatremia with hyperkalemia. Serum spot cortisol level was low normal and 17-hydroxyprogesterone level was low. Diagnosis of Smith–Lemli–Opitz syndrome and associated adrenal crisis was made based on clinical and biochemical features. Intravenously administered hydrocortisone was commenced to which he showed a marked clinical response.ConclusionsThis case describes a rare and atypical presentation of Smith–Lemli–Opitz syndrome and highlights the importance of making early and accurate syndromic diagnoses in children with dysmorphism to avoid sudden and life-threatening complications.

PLETH VARIABILITY INDEX-GUIDED FLUID THERAPY LOWERS POST-OPERATIVE LACTATE LEVELS IN DOGS UNDERGOING ELECTIVE ABDOMINAL SURGERY: A RANDOMIZED CONTROLLED TRIAL

To evaluate the hemodynamic optimization effect of pleth variability index (PVI)-guided fluid therapy during abdominal surgery on tissue perfusion, 19 client-owned dogs that underwent elective abdominal surgery were randomized into control ([Formula: see text]) and PVI ([Formula: see text]) groups. In the control group, perioperative fluid management was based on the 2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats. In the PVI group, the fluid rate was maintained based on basic daily requirements. If PVI was higher than 15% for [Formula: see text][Formula: see text]min, 3–5[Formula: see text]mL/kg of crystalloid fluid bolus was infused. The tissue perfusion indicator, lactate levels, was measured at the time of intubation, extubation, and 6, 12 and 24[Formula: see text]h postoperatively. There were no significant differences in total and average fluid infused between control and PVI groups. The control group had significantly higher lactate levels than that of the PVI group at 12[Formula: see text]h postoperatively ([Formula: see text][Formula: see text]mmol/L versus [Formula: see text][Formula: see text]mmol/L, [Formula: see text]) and overall postoperatively ([Formula: see text][Formula: see text]mmol/L versus [Formula: see text][Formula: see text]mmol/L, [Formula: see text]). The control group revealed more profound hemodilution, as indicated by significantly decreased postoperative blood urea nitrogen (BUN), creatinine, and total protein. PVI-guided fluid therapy lowers lactate levels after elective abdominal surgery in dogs. Therefore, based on the result of this study PVI may provide customized fluid therapy to improve tissue perfusion and avoid unnecessary fluid overload.

A retrospective study evaluating the efficacy of identification and management of sepsis at a district-level hospital internal medicine department in the Western Cape Province, South Africa, in comparison with the guidelines stipulated in the 2012 Survivi.

Currently there is little information on the identification, management and outcomes of patients with sepsis in developing countries. Simple cost-effective measures such as accurate identification of patients with sepsis and early antibiotic administration are achievable targets, within reach without having to make use of unsustainable protocols constructed in developed countries. To assess the ability of clinicians at a district-level hospital to identify and manage sepsis, and to assess patient outcome in terms of in-hospital mortality and length of hospital stay given the above management. A retrospective descriptive study design was used, analysing data from the routine burden of disease audit done on a 3-monthly basis at Karl Bremer Hospital (KBH) in the Western Cape Province, South Africa. The total sample size obtained was 70 patients, of whom 18 (25.7%) had an initial triage blood pressure indicative of sepsis-induced hypotension. However, only 1 (5.5%) of these 18 patients received an initial crystalloid fluid bolus of at least 30 mL/kg. The median time that elapsed before administration of antibiotics in septic shock was 4.25 hours. Furthermore, a positive delay in antibiotic administration (p=0.0039) was demonstrated. The data also showed that 8/12 patients (66.7%) with septic shock received inappropriate amounts of fluids. The in-hospital mortality rate for sepsis was 4/24 (16.7%), for severe sepsis 11/34 (32.3%) and for septic shock a staggering 9/12 (75.0%). The initial classification process and management of sepsis by clinicians at KBH is flawed. This inevitably leads to an increase in in-hospital mortality.

This Is the Year to Listen to Yourself.

This Is the Year to Listen to Yourself.

Management of Septic Shock in the Remote Prehospital Setting

This study aims to assess the management of septic shock by air medical retrieval teams in the remote setting. A retrospective observational study was performed over 36 months. Sixty-seven adult patients who met the criteria for septic shock were included. Respiratory sepsis was the working diagnosis for 53% of patients; this was confirmed on intensive care unit (ICU) discharge in 39% of patients. Intravenous antibiotics and oxygen were delivered in over 90% of patients. Central and arterial line insertions were performed in 48% and 40% of patients, respectively, and 79% of patients were catheterized. Thirty-three percent of patients required intubation, and 80% of patients received an initial crystalloid fluid bolus of 20 mL/kg. Vasopressors were started in 89% of patients. Upon reaching definitive care, 91% of patients were admitted to a high-dependency or ICU setting, with a median length of ICU stay of 4 days and a 30-day mortality of 13%. Of those admitted to the ICU, intubation was required in 48%, new renal support in 20%, and blood pressure support in 84% of patients, respectively. Septic shock was recognized early and managed aggressively by remote retrieval teams, which may have contributed to the low mortality rate observed.

Assessment of endothelial glycocalyx disruption in term parturients receiving a fluid bolus before spinal anesthesia: a prospective observational study

BackgroundFluid bolus administration is a standard treatment for hypotension. However, the effectiveness of the traditional prophylactic bolus in parturients undergoing spinal anesthesia for cesarean delivery has been questioned. One potential mechanism for the failure of a prophylactic fluid bolus to prevent hypotension is hypervolemia-induced destruction of the endothelial glycocalyx, a structure that plays a vital role in regulating intravascular fluid shifts. MethodsThirty healthy parturients undergoing elective cesarean delivery under spinal anesthesia were recruited. Known endothelial glycocalyx biomarkers, heparan sulfate and syndecan-1 along with atrial natriuretic peptide, were measured before and after a 750-mL crystalloid fluid bolus. Cardiac performance parameters, cardiac index and systemic vascular resistance, were monitored during the fluid bolus using thoracic-impedance cardiography. ResultsA significant increase in both heparan sulfate 96ng/mg (P=0.0098) and syndecan-1 2.4ng/mg (P=0.045) were observed after the fluid bolus. There was a non-significant increase in atrial natriuretic peptide 0.6pg/mg (P=0.293). Cardiac parameters showed a small but significant change; over an average of 15min, cardiac index increased by 0.1L/min/m2 (P=0.0005) and systemic vascular resistance decreased by 30.7dyn.s/cm5 (P=0.0025). ConclusionsA prophylactic fluid bolus in parturients undergoing spinal anesthesia for cesarean delivery disrupts the endothelial glycocalyx, as noted by a statistically significant increase in post-bolus heparan sulfate and syndecan-1 levels. Although studied in the past, atrial natriuretic peptide could not explain this disruption. Our fluid bolus did not have a clinically relevant effect on cardiac performance.

Effect of rapid fluid resuscitation using crystalloids or colloids on hemostasis in piglets

Impairment of blood coagulation is one of the main side effects of volume replacement, particularly if artificial colloids such as hydroxyethyl starch (HES) and gelatine preparations are used. This animal study aimed to evaluate the effect of a single fast intravenous crystalloid or colloid fluid bolus on blood coagulation as measured by rotation thromboelastometry (ROTEM). Thirty-two anesthetized piglets were infused with a rapid 20 ml·kg(-1) fluid bolus of either normal saline (NS), 4% gelatine, 5% albumin or 6% HES 130/0.4 (n = 8 per group) over a period of 2 min. Hemostasis was assessed by ROTEM before and 1 min after fluid administration. Within-group differences were analyzed by Wilcoxon test, and additionally overall Kruskal-Wallis test followed by posthoc Mann-Whitney U-test were applied to detect differences between groups. All fluids caused a significant weakening of clot strength within groups. HES and gelatine showed a significantly stronger impairment of clot growth and maximum clot firmness as compared with albumin and normal saline. Impairment of fibrin polymerization was more pronounced following HES as compared with all other fluids. After moderate but very fast volume loading, HES and gelatine impair blood coagulation to a larger extent as compared with albumin or normal saline, while no significant differences were observed between both artificial colloids.

Up-Down Determination of the 90% Effective Dose of Phenylephrine for the Treatment of Spinal Anesthesia-Induced Hypotension in Parturients Undergoing Cesarean Delivery

Hypotension frequently complicates spinal anesthesia for cesarean delivery, and vasopressors are the mainstay for treatment. The most effective dose of phenylephrine for the treatment of spinal anesthesia-induced hypotension has not been estimated. Healthy nonlaboring women undergoing a cesarean delivery were recruited. All women received spinal anesthesia using hyperbaric bupivacaine 12 mg with fentanyl and morphine. Each subject received an i.v. crystalloid fluid bolus before and at the time of initiation of spinal anesthesia (preload and coload). An up-down sequential allocation method using the biased-coin design was used to estimate the 90% effective dose (ED(90)) of phenylephrine. The assigned phenylephrine dose was based on the response of the preceding subject. If the systolic blood pressure (SBP) decreased > 20% of baseline (i.e., SBP 20%) or to an SBP < 90 mm Hg, the assigned dose of phenylephrine was administered. If the SBP returned to within 20% of baseline or > or = 90 mm Hg within 1 min, this was considered a success, otherwise it was a failure. The initial dose of phenylephrine was 100 microg. The ED(90) with 95% confidence intervals (CIs) was calculated using the maximum likelihood estimation and Firth logistic regression. Sixty-nine subjects were screened to participate, of whom 66 subjects consented. Forty-five of the enrolled subjects experienced spinal anesthesia-induced hypotension and received a blinded dose of phenylephrine. Those subjects who developed hypotension received doses of phenylephrine between 80 and 180 microg. No subjects experienced hypertension. Determined with the maximum likelihood estimation method, the ED(90) of phenylephrine was 147 microg (95% CI, 98-222 microg). With Firth regression, the probability of a successful response at 150 microg is 90.5% (95% CI, 66.0%-99.0%). In this study, we estimated that the ED(90) of phenylephrine required to treat spinal anesthesia-induced hypotension in cesarean delivery is approximately 150 microg.

A volume loading test for the detection of hypovolemia and dehydration

There is a need for simple method allowing detection of dehydration and hypovolemia. Based on a new theory of homeostatic blood states, we hypothesized that hemodilution following standardized crystalloid fluid bolus can be used to discriminate between baseline normohydration and dehydration, also normovolemia and hypovolemia. Computer simulations based on previously published kinetic data were used to define the best time points for discrimination between baseline normohydration and dehydration, also normovolemia and hypovolemia. Hemodilution was compared at the proposed timing in 20 volunteers who received 40 infusions of Ringer's solution of 25 mL/kg during 30 minutes. Simulations indicated that preexisting hypovolemia could be best detected at the end of infusion, while dehydration 20-30 min later. In baseline hypovolemia, the peak reduction of hemoglobin concentration was 16.0% at the end of infusion, while it was only 11.8%, when participants were normovolemic (P<0.004). In baseline dehydration, the residual hemodilution was 8.6%, when measured 30 min after the end of infusion. It was only 3.1% in baseline normohydration (P<0.006). In response to fluid load, the baseline dehydration exaggerates the lowering of residual hemoglobin in respect to baseline. Meanwhile, baseline hypovolemia exaggerates the lowering of peak hemoglobin concentration. The volume loading test that deploys interpretation of hemoglobin dynamics in response to the test volume load could possibly serve as an easily available guide to indicate an individual patient's baseline hydration state and volemia. The introduction of continuous noninvasive monitoring of hemoglobin concentration would expand the applicability of the new method.

Fluid preload before spinal anaesthesia in Caesarean section

We evaluated the effect of two different preload solutions: (i) Ringer's lactate (compound sodium lactate intravenous infusion BP) and (ii) 0.9% sodium chloride solution on the neonatal acid-base status of the newborn infants. The two standard regimens were compared to detect a possible difference. A 2 L crystalloid fluid bolus was administered immediately before spinal anaesthesia for elective Caesarean section in two groups of 20 healthy parturients, while rigorously maintaining maternal normotension. No significant differences in the Apgar scores at 1 and 5 min, or infant well-being were demonstrated in either of the two groups. The data show that umbilical artery PCO2 is lower in the Ringer's lactate group and that pH is insignificantly higher by 0.03. The choice of Ringer's lactate or saline for fluid preload does not have any effect on neonatal well-being.

Pediatric septic shock.

1. Stephen M. Schexnayder, MD* 1. 2. *Associate Professor of Pediatrics & Internal Medicine, University of Arkansas for Medical Sciences, Arkansas Children’s Hospital, Little Rock, AR. After completing this article, readers should be able to: 1. Explain how the host’s immune response may cause toxic effects during sepsis. 2. Delineate the cornerstone of resuscitation in patients who have septic shock. 3. List the factors to be considered when prescribing empiric antimicrobial therapy for septic shock. 4. Explain when referral and transport arrangements should be made for patients in septic shock. Despite major advances in vaccines in the past two decades, septic shock continues to be an important pediatric problem. It is a frequent reason for admission to a pediatric intensive care unit, and this complex problem requires prompt recognition and intervention to improve the likelihood of a good outcome. Because the clinical picture of sepsis is not unique to infectious conditions, a number of definitions have been advocated. Investigators in the field have separated the clinical spectrum of sepsis into the categories of bacteremia, systemic inflammatory response syndrome, sepsis, severe sepsis, septic shock, and multiple organ dysfunction syndrome. Clinical observations over the past two decades have led to the description of the systemic inflammatory response syndrome (SIRS) and have identified the major role that endothelium plays in the pathogenesis of this disorder. Infection is one of the major causes of SIRS, but a number of other entities, including trauma, acute respiratory distress syndrome, neoplasms, burns, and pancreatitis, also have been recognized as triggers for this complex series of pathophysiologic events. Although initially written with adult vital sign parameters, the principles behind the definitions shown in Table 1⇓ are valid, and modifications have been proposed for applying them to children. View this table: Table 1. Definitions of the Systemic Inflammatory Response Syndrome Sepsis is a recognized important cause of death, with the highest mortality rate occurring among infants. The most recent data report 5.9 deaths per 100,000 population in infants, with the fatality rate decreasing …

Safety considerations and fluid resuscitation in liposuction: an analysis of 53 consecutive patients.

There is no agreement as to appropriate fluid resuscitation in patients undergoing liposuction. This has assumed greater significance, as surgeons have undertaken larger volume aspirations (> or = 4 liters) and the potential complications of hypovolemia and fluid overload have materialized. This prospective study of 53 consecutive healthy patients undergoing liposuction using a superwet technique served to develop general guidelines for safe perioperative fluid management, especially in regard to large-volume aspirations. In this context, "aspirate" is defined as the total fat and fluid that is removed during liposuction. All patients were monitored using standard noninvasive hemodynamic monitoring. Thirty-six patients were monitored perioperatively with Foley catheters. The 53 patients underwent liposuction alone. We did not include patients who underwent concurrent aesthetic surgical procedures because our intention was to establish fluid administration guidelines for the liposuction patient. There were no significant complications in our series. The intraoperative fluid ratio, defined as (intravenous fluid + infiltrate)/aspirate, was 2.1 for the small-volume group and 1.4 for the large-volume group. These values were significantly different (p < .001, t test). Average urine output in the operating room and recovery room and on the floor was satisfactory (> 0.5 to 1 cc/kg/hr) and did not relate to volume aspirated (p = 0.21, 0.91, and 0.6, respectively, t test). Four patients who underwent "large-volume" aspirations (> or = 4 liters) had transient hypotension, which was immediately responsive to crystalloid fluid boluses in the first postoperative hours. All other patients required only maintenance intravenous crystalloid postoperatively until oral intake had been resumed. There were no statistically significant differences in postoperative fluid administration between the small- and large-volume groups. Ninety-three percent of patients were discharged within 24 hours of surgery. Our suggested guidelines for fluid resuscitation based on this retrospective study are as follows: (1) small volume (< 4 liters aspirated): maintenance fluid + subcutaneous wetting solution; (2) large volume (> or = 4 liters aspirated): maintenance fluid + subcutaneous wetting solution + 0.25 cc of intravenous crystalloid per cc of aspirate removed after 4 liters. This formula has since been used in the care of 94 patients who have undergone liposuction exclusively. All patients have had unremarkable hospital courses. These guidelines do not replace sound clinical judgment. Good communication between the surgeon and anesthesiologist is critical to optimal patient care and safety.