0.9% saline versus Plasma-Lyte 148 for intravenous fluid therapy

<p>BACKGROUND Intravenous fluid therapy is one of the most common interventions used in acute medicine. Worldwide, there are variations in the prescription of intravenous fluids and no consensus on the best intravenous fluid to use. Currently, 0.9% saline is the most frequently prescribed intravenous fluid; however, there is emerging evidence to suggest that 0.9% saline may be associated with an increased risk of acute kidney injury (AKI), increased blood transfusion requirements and gastrointestinal dysfunction when compared to a buffered crystalloid fluid, such as Plasma-Lyte 148. METHODS Study one: A prospective, multicentre, randomised, double-blind, cluster, double crossover study conducted over 28 weeks in four New Zealand intensive care units (ICU) comparing 0.9% saline to Plasma-Lyte 148. The primary outcome was the proportion of patients with either AKI or renal failure according to the RIFLE criteria definitions based on serum creatinine levels. Study two: An exploratory subgroup analysis of cardiac surgical patients enrolled in study one to compare the effects of 0.9% saline vs. Plasma-Lyte 148 on the need for blood transfusions. The primary outcome was the proportion of patients receiving blood or blood products in the ICU. Additionally, an in-depth single-centre nested cohort study comparing the effect of 0.9% saline vs. Plasma-Lyte 148 on blood loss and blood products was also conducted. Study three: A single-centre nested study within study one comparing the effect of 0.9% saline vs. Plasma-Lyte 148 on gastrointestinal dysfunction in patients expected to be mechanically ventilated for >48 hours and receiving enteral nutrition via the nasogastric route. The primary outcome was the proportion of patients with gastrointestinal intolerance (high gastric residual volumes (GRV), vomiting, and diarrhoea). RESULTS Study one: 2262 patients were enrolled and analysed, 1152 patients were allocated to receive Plasma-Lyte 148 and 1110 participants were allocated to receive 0.9% saline. In the Plasma-Lyte 148 group, 102 of 1067 patients (9.6%) developed AKI, compared with 94 of 1025 patient (9.2%) in the 0.9% saline group (RR 1.05; 95% CI, 0.78 to 1.41; p=0.76). Overall, 87 of 1152 patients (7.6%) in the Plasma-Lyte 148 group and 95 of 1110 patients (8.6%) in the 0.9% saline group died in hospital (RR, 0.88; 95% CI 0.67 to 1.17; p=0.40). Study two: 954 cardiac surgical patients were included, 475 patients were allocated to receive Plasma-Lyte 148 and 479 were allocated to receive 0.9% saline. 128 of 475 patients (26.9%) in the Plasma-Lyte 148 group received blood or a blood product compared with 94 of 479 (19.6%) patients in the 0.9% saline group (OR [95% CI], 1.51 [1.11-2.05]; p=0.008). Within the nested cohort (n=251, 131 assigned to Plasma-Lyte 148 and 120 assigned to 0.9% saline), there were no differences between groups in chest drain losses at 12 hours. Study three: 69 patients were enrolled and analysed, with 35 allocated to receive Plasma-Lyte 148 and 34 allocated to receive 0.9% saline. In the Plasma-Lyte 148 group, 21 of 35 patients (60.0%) developed gastrointestinal feeding intolerance, compared with 22 of 34 patients (64.7%) in the 0.9% saline group (OR, 0.82; 95% CI, 0.31–2.17; p=0.69). A high GRV was seen in 4 of 35 patients (11.4%) in the Plasma-Lyte 148 group, and in 11 of 34 patients (32.4%) in the 0.9% saline group (OR, 0.27; 95% CI, 0.08–0.96; p=0.04). CONCLUSION This research programme provides data from the first interventional study conducted in critically unwell patients on the comparative effectiveness of 0.9% saline compared to a buffered crystalloid solution for intravenous fluid therapy. Among patients receiving crystalloid fluid in the ICU, allocation to Plasma-Lyte 148 compared to 0.9% saline did not influence the risk of AKI. Within a subgroup of patients undergoing cardiac surgery allocation to Plasma-Lyte 148 was associated with an increased requirement for blood or blood products. Among mechanically ventilated patients receiving nasogastric feeding, the use of Plasma-Lyte 148 compared to 0.9% saline did not reduce the proportion of patients developing gastrointestinal feeding intolerance but was associated with a decreased incidence of high GRV. These findings suggest that Plasma-Lyte 148 as compared with 0.9% saline may have differing effects within the biological/organ systems and sub-groups of patients admitted to the ICU. Further large randomised clinical trials (RCT) are needed to assess the efficacy in higher-risk populations and to measure ongoing areas of uncertainty in clinically important outcomes such as mortality.</p>

0.9% saline versus Plasma-Lyte 148 for intravenous fluid therapy

<p>BACKGROUND Intravenous fluid therapy is one of the most common interventions used in acute medicine. Worldwide, there are variations in the prescription of intravenous fluids and no consensus on the best intravenous fluid to use. Currently, 0.9% saline is the most frequently prescribed intravenous fluid; however, there is emerging evidence to suggest that 0.9% saline may be associated with an increased risk of acute kidney injury (AKI), increased blood transfusion requirements and gastrointestinal dysfunction when compared to a buffered crystalloid fluid, such as Plasma-Lyte 148. METHODS Study one: A prospective, multicentre, randomised, double-blind, cluster, double crossover study conducted over 28 weeks in four New Zealand intensive care units (ICU) comparing 0.9% saline to Plasma-Lyte 148. The primary outcome was the proportion of patients with either AKI or renal failure according to the RIFLE criteria definitions based on serum creatinine levels. Study two: An exploratory subgroup analysis of cardiac surgical patients enrolled in study one to compare the effects of 0.9% saline vs. Plasma-Lyte 148 on the need for blood transfusions. The primary outcome was the proportion of patients receiving blood or blood products in the ICU. Additionally, an in-depth single-centre nested cohort study comparing the effect of 0.9% saline vs. Plasma-Lyte 148 on blood loss and blood products was also conducted. Study three: A single-centre nested study within study one comparing the effect of 0.9% saline vs. Plasma-Lyte 148 on gastrointestinal dysfunction in patients expected to be mechanically ventilated for >48 hours and receiving enteral nutrition via the nasogastric route. The primary outcome was the proportion of patients with gastrointestinal intolerance (high gastric residual volumes (GRV), vomiting, and diarrhoea). RESULTS Study one: 2262 patients were enrolled and analysed, 1152 patients were allocated to receive Plasma-Lyte 148 and 1110 participants were allocated to receive 0.9% saline. In the Plasma-Lyte 148 group, 102 of 1067 patients (9.6%) developed AKI, compared with 94 of 1025 patient (9.2%) in the 0.9% saline group (RR 1.05; 95% CI, 0.78 to 1.41; p=0.76). Overall, 87 of 1152 patients (7.6%) in the Plasma-Lyte 148 group and 95 of 1110 patients (8.6%) in the 0.9% saline group died in hospital (RR, 0.88; 95% CI 0.67 to 1.17; p=0.40). Study two: 954 cardiac surgical patients were included, 475 patients were allocated to receive Plasma-Lyte 148 and 479 were allocated to receive 0.9% saline. 128 of 475 patients (26.9%) in the Plasma-Lyte 148 group received blood or a blood product compared with 94 of 479 (19.6%) patients in the 0.9% saline group (OR [95% CI], 1.51 [1.11-2.05]; p=0.008). Within the nested cohort (n=251, 131 assigned to Plasma-Lyte 148 and 120 assigned to 0.9% saline), there were no differences between groups in chest drain losses at 12 hours. Study three: 69 patients were enrolled and analysed, with 35 allocated to receive Plasma-Lyte 148 and 34 allocated to receive 0.9% saline. In the Plasma-Lyte 148 group, 21 of 35 patients (60.0%) developed gastrointestinal feeding intolerance, compared with 22 of 34 patients (64.7%) in the 0.9% saline group (OR, 0.82; 95% CI, 0.31–2.17; p=0.69). A high GRV was seen in 4 of 35 patients (11.4%) in the Plasma-Lyte 148 group, and in 11 of 34 patients (32.4%) in the 0.9% saline group (OR, 0.27; 95% CI, 0.08–0.96; p=0.04). CONCLUSION This research programme provides data from the first interventional study conducted in critically unwell patients on the comparative effectiveness of 0.9% saline compared to a buffered crystalloid solution for intravenous fluid therapy. Among patients receiving crystalloid fluid in the ICU, allocation to Plasma-Lyte 148 compared to 0.9% saline did not influence the risk of AKI. Within a subgroup of patients undergoing cardiac surgery allocation to Plasma-Lyte 148 was associated with an increased requirement for blood or blood products. Among mechanically ventilated patients receiving nasogastric feeding, the use of Plasma-Lyte 148 compared to 0.9% saline did not reduce the proportion of patients developing gastrointestinal feeding intolerance but was associated with a decreased incidence of high GRV. These findings suggest that Plasma-Lyte 148 as compared with 0.9% saline may have differing effects within the biological/organ systems and sub-groups of patients admitted to the ICU. Further large randomised clinical trials (RCT) are needed to assess the efficacy in higher-risk populations and to measure ongoing areas of uncertainty in clinically important outcomes such as mortality.</p>

Palliative medicine in the emergency department: symptom control and aggressive care

ObjectivesIdentifying the prevalence of palliative care (PC) needs among patients who die at the emergency department (ED) and to assess symptom control and aggressiveness of care.MethodsWe conducted a decedent cohort study of adults deceased at the ED of a Portuguese teaching hospital in 2016. PC needs were identified using the National Hospice Organization terminality criteria and comorbidities measurement by the Charlson’s Index.Results384 adults died at the ED (median age 82 (IQR 72–89) years) and 78.4% (95% CI 73.9% to 82.2%) presented PC needs. Only 3.0% (n=9) were referred to the hospital PC team. 64.5%, 38.9% and 57.5% experienced dyspnoea, pain and confusion, respectively. Dyspnoea was commonly medicated (92%), against 56% for pain and 8% for confusion. Only 6.3% of the patients were spared from aggressive interventions, namely blood collection (86.0%) or intravenous fluid therapy (63.5%). The burden of aggressive interventions was similar between those with or without withhold cardiopulmonary resuscitation order (median 3 (2–4) vs 3 (2–5)), p=0.082.ConclusionsNearly four out of five adults who died at the ED had PC needs at the time of admission. Most experienced poor symptom control and care aggressiveness in their last hours of life and were mostly unknown to the PC team. The findings urge improvements in the care provided to patients with PC needs at the ED, focusing on patient well-being and increased PC referral.

Comparative Trial of Continuous Flow Enteral and Intravenous Fluid Therapy in Horses

Continuous flow enteral fluid therapy with isotonic and hypotonic enteral electrolyte solutions are as safe and effective as intravenous fluid therapy. The aim of this study was to carry out a comparative assessment between continuous flow enteral and intravenous (IV) fluid therapy in adult experimentally dehydrated horses. Six experimentally dehydrated adult mares were used in a study carried out in a 6 × 3 crossover design, which each animal received three different treatments (isotonic enteral fluid therapy—EsISO, hypotonic enteral fluid therapy—EsHYPO and intravenous fluid therapy with Lactate Ringer Solution—LR IV, all in continuous flow). Solutions were administered at a rate of 15 mL−1.kg−1.h−1 for 8 h, after 36 h of water and food deprivation. Serum and urinary biochemical assessment; urinary volume, pH and specific gravity; and blood gas analysis were measured at −36, 0, 2, 4, 6, and 8 h. The dehydration period (DP) caused discrete hydroelectrolytic and acid base imbalances. The EsISO, EsHYPO and LR IV increased blood volume. Enteral solutions restored the imbalances yielded by the DP and all treatments increased urine volume. Also, the EsHYPO and LR IV showed no effects in acid base balance, while EsISO showed slightly acidifying effect. The present study certifies the efficacy and safety of isotonic and hypotonic continuous flow enteral fluid therapy in comparison to IV fluid therapy in dehydrated horses.

Traumatic Brain Injury—A Review of Intravenous Fluid Therapy

This manuscript will review intravenous fluid therapy in traumatic brain injury. Both human and animal literature will be included. Basic treatment recommendations will also be discussed.

0.9% Sodium chloride solution versus Plasma-Lyte 148 versus compound sodium lacTate solution in children admitted to PICU—a randomized controlled trial (SPLYT-P): study protocol for an intravenous fluid therapy trial

Background Intravenous fluid therapy represents the most common intervention critically ill patients are exposed to. Hyperchloremia and metabolic acidosis associated with 0.9% sodium chloride have been observed to lead to worse outcomes, including mortality. Balanced solutions, such as Plasma-Lyte 148 and Compound Sodium Lactate, represent potential alternatives but the evidence on optimal fluid choices in critically ill children remains scarce. This study aims to demonstrate whether balanced solutions, when used as intravenous fluid therapy, are able to reduce the incidence of a rise in serum chloride level compared to 0.9% sodium chloride in critically ill children. Methods This is a single-centre, open-label randomized controlled trial with parallel 1:1:1 assignment into three groups: 0.9% sodium chloride, Plasma-Lyte 148, and Compound Sodium Lactate solutions for intravenous fluid therapy. The intervention includes both maintenance and bolus fluid therapy. Children aged < 16 years admitted to intensive care and receiving intravenous fluid therapy during the first 4 h of admission are eligible. The primary outcome measure is a ≥ 5mmol/L increase in serum chloride level within 48 h post-randomization. The enrolment target is 480 patients. The main analyses will be intention-to-treat. Discussion This study tests three types of intravenous fluid therapy in order to compare the risk of hyperchloremia associated with normal saline versus balanced solutions. This pragmatic study is thereby assessing the most common intervention in paediatric critical care. This is a single-centre open-label study with no blinding at the level of delivery of the intervention. Certain paediatric intensive care unit (PICU) patient groups such as those admitted with a cardiac condition or following a traumatic brain injury are excluded from this study. Trial registration The study has received ethical approval (HREC/19/QCHQ/53177: 06/06/2019). It is registered in the Australian New Zealand Clinical Trials Registry (ACTRN12619001244190) from 9th September 2019. Recruitment commenced on 12th November 2019. The primary results manuscript will be published in a peer-reviewed journal.

Fluid Overload

Fluid overload (FO) is characterized by hypervolemia, edema, or both. In clinical practice it is usually suspected when a patient shows evidence of pulmonary edema, peripheral edema, or body cavity effusion. FO may be a consequence of spontaneous disease, or may be a complication of intravenous fluid therapy. Most clinical studies of the association of FO with fluid therapy and risk of harm define it in terms of an increase in body weight of at least 5–10%, or a positive fluid balance of the same magnitude when fluid intake and urine output are measured. Numerous observational clinical studies in humans have demonstrated an association between FO, adverse events, and mortality, as have two retrospective observational studies in dogs and cats. The risk of FO may be minimized by limiting resuscitation fluid to the smallest amount needed to optimize cardiac output and then limiting maintenance fluid to the amount needed to replace ongoing normal and pathological losses of water and sodium.

896 Improving Intravenous Fluid Therapy to Reduce the Incidence of Acute Kidney Injury in Hip Fracture Patients

Background Acute kidney injury (AKI) in hip fracture patients is associated with morbidity, mortality, and increased length of stay. To avoid this our unit policy recommends maintenance crystalloid IV fluids of &gt; 62.5mL/Hr for hip fracture patients. Method Three prospective audits, each including 100 consecutive acute hip fracture patients, were completed with interventional measures employed between each cycle. Data collection points included details of IV fluid administration and pre/post-operative presence of AKI. Interventions between cycles included implementation of admission/post-take checklist tools and various educational measures for Emergency Department, nursing and admitting team staff with dissemination of infographic posters, respectively. Results In cycle one and two, many patients received inadequate fluids (46/100 and 56/100 respectively). There was no significant difference in the incidence of AKI between patients receiving adequate or inadequate fluid in either cycle (p &lt; 0.05). In cycle three, more patients received adequate fluids (79/100, p &lt; 0.05). Patients prescribed adequate fluids were less likely to develop post-operative AKI (2/79, 2.5% vs 3/21, 14.3%; p &lt; 0.05). Discussion This audit demonstrates the importance of administering appropriate IV fluid in hip fracture patients to avoid AKI. Improving coordination with Emergency Department and ward nursing/medical ward staff was a critical step in improving our unit’s adherence to policy.