Fluid Administration Strategy Research Articles

Effects of Balanced Versus Saline-based Solutions on Acute Kidney Injury in Off-pump Coronary Artery Bypass Surgery: A Randomized Controlled Trial

To determine whether balanced solutions can reduce the incidence of acute kidney injury after off-pump coronary artery bypass surgery compared with saline. Randomized controlled trial. Single tertiary care center. Patients who underwent off-pump coronary artery bypass surgery between June 2014 and July 2020. Balanced solution-based chloride-restrictive intravenous fluid strategy. The primary outcome was acute kidney injury within 7 postoperative days, as defined by the 2012 Kidney Disease: Improving Global Outcomes Clinical Practice Guideline. The incidence of acute kidney injury was 4.4% (8/180) in the balanced group and 7.3% (13/178) in the saline group. The difference was not statistically significant (risk difference, -2.86%; 95% confidence interval [CI], -7.72% to 2.01%; risk ratio, 0.61, 95% CI, 0.26 to 1.43; p = 0.35). Compared with the balanced group, the saline group had higher levels of intraoperative serum chloride and lower base excess, which resulted in a lower pH. In patients undergoing off-pump bypass surgery with a normal estimated glomerular filtration rate, the intraoperative balanced solution-based chloride-restrictive intravenous fluid administration strategy did not decrease the rate of postoperative acute kidney injury compared with the saline-based chloride-liberal intravenous fluid administration strategy.

Intraoperative Fluid Management Correlates with Intraoperative Complications in Cesarean Section: A Prospective Clinical Trial

Background: This study focused on perioperative fluid administration in pregnant women undergoing a caesarean section (CS) by comparing liberal and non-liberal fluid administration in a multicentre setting across various Hospitals in the Bali province and its surrounding areas.
 Methods: Sampling was conducted using a total sampling method. All patients meeting the inclusion criteria were included in this study. A total of 310 samples of pregnant patients undergoing CS surgery in various operating rooms across hospitals in the Bali province and surrounding areas were obtained during the period of January to December 2022. The fluid administration strategy was divided into two types: liberal and non-liberal. Data analysis was performed using the Chi-square test with the correlation test of the contingency coefficient.
 Results: The results showed that liberal fluid administration significantly increased complications in the operating room for pregnant patients undergoing cesarean section (p<0.001; r=0.305; OR 6.22) but not in the recovery room or postoperative hospital ward.
 Conclusion: Liberal fluid administration could significantly increase complications in the operating room for pregnant patients undergoing cesarean section but not in the postoperative period.

Comparative Study between Restrictive versus Liberal Intravenous Fluid Administration in Severe Sepsis and Septic Shock; A Randomized Clinical Trial

Abstract Background Sepsis is an inflammatory response to severe infection characterized by hypovolemia and vasodilation and treated with early antibiotics and fluid resuscitation. In-hospital mortality rates have decreased from 80% in the early years of intensive care to 20-30% in the modern era through improved surveillance, early treatment of underlying infection, and advances in support for failing organs. Despite the central role intravenous (IV) fluid administration has played in sepsis management for the last 15 years, fundamental questions regarding “which fluid” and “in what amount” remain unanswered. Objective To compare between the outcomes of fluid administration strategies in the form of restricted or usual fluid administration in patient with severe sepsis and septic shock, and to detect the optimal strategy of fluid administration which decreases morbidity and mortality. Patients and Methods This was a Prospective controlled; randomized, comparative study was conducted in the intensive care units at Ain-Shams University Hospitals and Gamal Abdelnaser Hospital. This study was conducted on 80 adult patients divided into two groups: Group A: 40 adult patients taking the Usual Care, and Group B: 40 adult patients taking the Restrictive Care. Results The restrictive fluid group received significantly less resuscitative IV fluid than the usual care group prior to randomization, over 24 hours, over 48 hours, over 72 hours and total, Moreover; the restrictive fluid group also received a lower fraction of non-resuscitative IV fluid than the usual care group. In addition, the restrictive fluid group also received less amount of total forms IV fluid than the usual care group. There were no statistically significant differences between the two groups in adjunct resuscitative measures administered including albumin, blood transfusion, or stress dose steroids. By day 30, 9 participants (22.5%) in the restrictive fluid group and 7 participants (17.5%) in the usual care had died with no statistical significant difference between the both groups (p = 0.29). Conclusion A restrictive resuscitation strategy that significantly limited the amount of IV fluid administered to patients with severe sepsis and septic shock show slight improvement as regard mean arterial blood pressure, urine output and lactate level. at the same time did not appear to increase mortality, organ dysfunction, or adverse events. Our data contribute to the current state of clinical equipoise surrounding the use of IV fluids in sepsis, support a larger multicenter trial addressing this topic, and inform future study design. This study demonstrates that a restrictive resuscitation strategy can successfully reduce the amount of IV fluid administered to patients with severe sepsis and septic shock compared with usual care. Although limited by the sample size, we observed no increase in mortality, organ failure, or adverse events.

Choosing fluids to reduce the risk of delayed graft function after deceased donor kidney transplantation

Delayed graft function (DGF) after deceased donor kidney transplantation, defined clinically as the need for at least one dialysis session within the first week after transplantation, is a common occurrence. 1 Swanson KJ Bhattarai M Parajuli S Delayed graft function: current status and future directions. Curr Opin Organ Transplant. 2023; 28: 1-7 Crossref PubMed Scopus (0) Google Scholar Use of organs that are predisposed to DGF is increasing, 2 NHS Blood and TransplantOrgan and tissue donation and transplantation. Activity Report 2021/22. nhsbtdbe.blob.core.windows.net/umbraco-assets-corp/27108/activity-report-2021-2022.pdfDate accessed: March 23, 2023 Google Scholar meaning it is important to consider the clinical sequelae of DGF. In a systematic review and meta-analysis of 38 studies, 3 Li MT Ramakrishnan A Yu M et al. Effects of delayed graft function on transplant outcomes: a meta-analysis. Transplant Direct. 2023; 9: e1433 Crossref PubMed Scopus (1) Google Scholar DGF was associated with adverse short-term and long-term outcomes, including risk for rejection, graft failure, and (in single-centre studies only) all-cause mortality. Some studies suggest the duration of DGF is more important than its occurrence. 4 Schrezenmeier E Müller M Friedersdorff F et al. Evaluation of severity of delayed graft function in kidney transplant recipients. Nephrol Dial Transplant. 2022; 37: 973-981 Crossref PubMed Scopus (2) Google Scholar However, any DGF has a real-world impact on patients and can influence decision making for clinicians. For example, a third of North American transplant professionals indicated in a survey that the risk of DGF had a role in their willingness to accept organs, 5 Jadlowiec CC Hippen B Gill J et al. Current opinions on DGF management practices: a survey of the United States and Canada. Clin Transplant. 2023; 37: e14949 Crossref PubMed Scopus (0) Google Scholar and strategies to reduce DGF are a clinical priority. A simple intervention to reduce DGF might relate to optimising intravenous fluid replacement. Isotonic sodium chloride (0·9% saline) is the standard of care in many transplantation units. However, 0·9% saline might be harmful due to its high chloride content, which causes metabolic acidosis and can promote acute kidney injury, thus DGF. 6 Yunos NM Bellomo R Hegarty C Story D Ho L Bailey M Association between a chloride-liberal vs chloride-restrictive intravenous fluid administration strategy and kidney injury in critically ill adults. JAMA. 2012; 308: 1566-1572 Crossref PubMed Scopus (844) Google Scholar Balanced crystalloid solution versus saline in deceased donor kidney transplantation (BEST-Fluids): a pragmatic, double-blind, randomised, controlled trialAmong patients receiving a deceased donor kidney transplant, intravenous fluid therapy with balanced crystalloid solution reduced the incidence of DGF compared with saline. Balanced crystalloid solution should be the standard-of-care intravenous fluid used in deceased donor kidney transplantation. Full-Text PDF

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Article| June 2023 SEE Question ASA Monitor June 2023, Vol. 87, 10. https://doi.org/10.1097/01.ASM.0000938788.55744.cf Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Cite Icon Cite Get Permissions Search Site Citation SEE Question. ASA Monitor 2023; 87:10 doi: https://doi.org/10.1097/01.ASM.0000938788.55744.cf Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll PublicationsASA Monitor Search Advanced Search Topics: body fluid, intensive care unit, intravenous fluids administration, mortality, septic shock, vasoconstrictor agents, adverse event, crystalloid solutions, renal failure, acute A 35-year-old man is admitted to the intensive care unit (ICU) in septic shock after surgery for a perforated appendix. According to a recent study comparing fluid administration strategies in ICU patients in septic shock, which of the following outcomes is MOST likely if this patient is administered a restrictive fluid strategy as opposed to a standard fluid strategy? Sepsis remains a top cause of mortality worldwide. The Surviving Sepsis Campaign has published recommendations for the treatment of sepsis and septic shock. The most recent publication in 2021 retained the rating of strong for some recommendations, such as the use of vasopressor support to maintain a mean arterial pressure (MAP) of 65 mm Hg or greater. Other recommendations had their ratings downgraded; for example, the recommendation regarding the use of a 30-mL/kg intravenous (I.V.) crystalloid fluid bolus within the first three hours for the treatment of sepsis-induced hypotension was downgraded... You do not currently have access to this content.

New Insights into the Fluid Management in Patients with Septic Shock.

The importance of fluid resuscitation therapy during the early stages of sepsis management is a well-established principle. Current Surviving Sepsis Campaign (SSC) guidelines recommend the early administration of intravenous crystalloid fluids for sepsis-related hypotension or hyperlactatemia due to tissue hypoperfusion, within the first 3 h of resuscitation and suggest using balanced solutions (BSs) instead of normal saline (NS) for the management of patients with sepsis or septic shock. Studies comparing BS versus NS administration in septic patients have demonstrated that BSs are associated with better outcomes including decreased mortality. After initial resuscitation, fluid administration has to be judicious in order to avoid fluid overload, which has been associated with increased mortality, prolonged mechanical ventilation, and worsening of acute kidney injury. The "one size fits all" approach may be "convenient" but it should be avoided. Personalized fluid management, based on patient-specific hemodynamic indices, provides the foundations for better patient outcomes in the future. Although there is a consensus on the need for adequate fluid therapy in sepsis, the type, the amount of administered fluids, and the ideal fluid resuscitation strategy remain elusive. Well-designed large randomized controlled trials are certainly needed to compare fluid choices specifically in the septic patient, as there is currently limited evidence of low quality. This review aims to summarize the physiologic principles and current scientific evidence regarding fluid management in patients with sepsis, as well as to provide a comprehensive overview of the latest data on the optimal fluid administration strategy in sepsis.

Fluid administration strategies for the prevention of contrast-associated acute kidney injury.

The known timing of contrast media exposure in patients identified as high-risk for contrast-associated acute kidney injury (CA-AKI) enables the use of strategies to prevent this complication of intravascular contrast media exposure. Although multiple preventive strategies have been proposed, periprocedural fluid administration remains as the primary preventive strategy. This is a critical review of the current evidence evaluating a variety of fluid administration strategies in CA-AKI. Fluid administration strategies to prevent CA-AKI include comparisons of intravenous (i.v.) to no fluid administration, different fluid solutions, duration of fluid administration, oral hydration, left ventricular end diastolic-pressure guided fluid administration and forced diuresis techniques. Despite an abundance of fluid administration trials, it is difficult to make definitive recommendations about preventive fluid administration strategies due to low scientific quality of published studies. The literature supports use of i.v. compared with no fluid administration, especially in high-risk patients undergoing intra-arterial contrast media exposure. Use of isotonic saline is recommended over 0.45% saline or isotonic sodium bicarbonate. Logistical considerations support shortened over longer i.v. fluid administration strategies, despite an absence of evidence of equivalent efficacy. Current literature does not support oral hydration for high-risk patients. The use of tailored fluid administration in heart failure patients and forced diuresis with matching fluid administration are promising new fluid administration strategies.

8 Less Is More: Reconsidering Hourly Urine Output Goals in Burn Resuscitation

IntroductionSignificant morbidity and mortality is seen with high volume burn resuscitations. Surpassing the Ivy Index, defined as 250 milliliters/kilogram (ml/kg), has been correlated with increased incidence of complications such as abdominal compartment syndrome. Cognizance of factors contributing to over-resuscitation can help optimize fluid administration strategies to minimize associated morbidity.MethodsA single-center Quality Improvement review was performed of all adult (age ≧ 18 years) burn-injured patients presenting to a major metropolitan burn center with burns ≧ 20% total body surface area (TBSA) between 12/2020-8/2021. Those not surviving the first 24 hours were excluded. Patient demographics and injury characteristics were collected, and resuscitation volumes and timing were recorded prospectively. Patients were categorized by whether their initial 24-hour intake exceeded their Ivy Index, and groups were compared to assess factors associated with over-resuscitation.ResultsDuring the study period 11 patients met inclusion criteria, and one early mortality was excluded. Patients were predominantly male (70.0%), with mean age 49.9±17.4 years. Burns were primarily due to flame injury, with mean TBSA 41.4±18.6%. Patients required resuscitation volumes of 5.9±1.7 ml/kg/TBSA%, with half surpassing their Ivy Index in the first 24 hours. These patients had larger burns (55.1±17.0% v. 27.7±5.1%) with a significantly higher third degree component (41.4±15.8% v. 15.4±15.2%, p = 0.029). None had diagnosed inhalation injury, and none required abdominal decompression for resuscitation-related compartment syndrome. Observed mortality rate was 30.0%. Patients resuscitating beyond their Ivy Index had significantly higher hourly urine output rates (0.96 v. 0.52 ml/kg, p = 0.024), and hourly urine output was significantly higher among non-survivors as compared to survivors (1.10 v. 0.60 ml/kg, p = 0.033).ConclusionsPatients with severe burn injury are at high risk for over-resuscitation and associated complications. While traditional teaching instructs a goal of hourly urine output of 0.5-1.0 ml/kg, our study shows that patients resuscitated on the higher end of this range were significantly more likely to surpass their Ivy Index and less likely to survive.

Fluid restriction versus conventional fluid administration in acute lung injury patients (Comparative study between different strategies of fluid administration in acute lung injury patients)

Abstract Background Acute lung injury and ARDS are major causes of morbidity and mortality all over the world. Major steps of understanding the pathophysiology, causes, diagnosis and treatment of this syndrome were taken in last twenty year. Diagnosis of this condition remains underestimated by physicians particularly mild form of this syndrome specially in developing world in which presence of investigations and well trained physicians is not adequate. Objective To compare between the outcomes of fluid administration strategies in the form of restricted or conventional fluid administration that affect oxygenation, weaning of mechanical ventilation and free days of icu admission in acute lung injury patients and its severe form ARDS. To detect the optimal strategy of fluid administration which decrease morbidity and mortality. Patients and Methods Type of Study: Prospective study. Study Setting: The study will be conducted in the ICU units at Ain-Shams University Hospitals and Ahmed Maher Teaching Hospital. Study Period: Four months from date of approval of the protocol. 90 adult patients- divided into three groups each group include 30 patients- (fulfilling inclusion criteria) admitted in the ICU units at Ain Shams University Hospitals and Ahmed Maher Teaching Hospital were included. Results Based on more than one point of view; underlying cause of ARDS palys major role in predicting these unpredictable results of this study in haemodynamically unstable patients. There are many factors, rather than hypoxemia, that affect organ outcomes (including respiratory system itself) in haemodynamically unstable patients which may caused by septic shock and other types of shock. Conclusion This small trial evoked new questions more than answering traditional ones about fluid management of acute lung injury and ARDS. Firstly; the accurate method to assess and guide fluid therapy in ARDS should be on top of searching priorities. Although using central venous pressure to guide fluid therapy could theoretically results in outcome improvement, but according to its many limitations and poor relation to volume status, its using in that issue is questionable. Secondly; establishing one fluid management strategy to all patients with ARDS seems to be not accurate. Unpredictable results on outcomes in ARDS patients receiving fluids particularly in those were haemodynamically unstable drive us to seek for new classification of ARDS patients based on underlying cause, haemodynamic stability and other elements that responsible for organ failure rather than volume status. However; this small trial suggests conservative fluid strategy in acute lung injury patients which are haemodynamically stable. And using of both conservative and liberal fluid administration strategies wisely in those patients which are haemodynamically unstable to reach the optimal intravascular volume– pressure with the best risk–benefit ratio.

EVALUATION OF FLUID BALANCE IN ADULT PATIENTS WITH SEPSIS

TOPIC: Critical Care TYPE: Original Investigations PURPOSE: Fluid balance and fluid management are complex issues affected by multiple patient variables. Positive net fluid balance has been correlated with increased mortality in sepsis. This study evaluated net fluid balance in patients with a diagnosis of sepsis at an academic medical center. METHODS: This study was approved by the Creighton University Institutional Review Board. We retrospectively reviewed the charts of 574 patients with sepsis who required >48 hours of ICU care in 2019. The primary outcome was mortality: secondary endpoints included SOFA score, ICU length of stay, site of infection, comorbidities, vasopressor use, and fluid balance at 24 hours, 72 hours, 7 days in the ICU, and cumulative fluid balance at ICU discharge. RESULTS: 199 patients met our inclusion criteria and were further analyzed; 51 (25.6%) died. Increased age (OR=1.28 for each 10-year increase, 95% CI: 1.01 to 1.62; P=0.042), increased SOFA scores (OR=1.26, 95% CI: 1.12 to 1.42; p<0.001), and pneumonia (OR=3.74, 95% CI: 1.63 to 8.60, P=0.002) were independent predictors of increased mortality. A higher net fluid balance at ICU discharge was associated with a statistically significant increase in mortality (OR=1.03 for each 500 mL increase, 95% CI: >1.00 to 1.05; P=0.022). Pneumonia was the source of sepsis in most patients (n=52, 26%). The relationship between fluid balance and mortality did not differ between pneumonia and non-pneumonia patients. CONCLUSIONS: The present retrospective analysis suggests that in patients diagnosed with sepsis a lower net fluid balance is associated with decreased mortality. Younger age and lower severity of illness were correlated with decreased mortality among patients with sepsis. CLINICAL IMPLICATIONS: Our study affirms that a thoughtful approach to fluid resuscitation should be utilized in septic critically ill patients, which may include judicious fluid administration and diuretic strategies to further improve patient outcomes. In addition, the relationship between pneumonia and fluid balance may warrant a more in-depth investigation. DISCLOSURES: No relevant relationships by Sarah Aurit, source=Web Response No relevant relationships by Khalid Bashir, source=Web Response No relevant relationships by Daniel Hilleman, source=Web Response No relevant relationships by Mark Malesker, source=Web Response No relevant relationships by Lee Morrow, source=Web Response No relevant relationships by Robert Plambeck, source=Web Response No relevant relationships by Abaigeal Tarpey, source=Web Response

Crossing the rubicon: Exploring different peri – Operative fluid resuscitation strategies in traumatic extremity free tissue transfer- a retrospective case control study

Free tissue transfer has added to the plastic surgeon's armamentarium and has afforded patients more chances towards limb salvage in recent decades following severe trauma. Venous congestion is a common occurrence, can be the result of several reasons and has devastating results in patients' outcomes. Recent studies have highlighted the importance of restrictive fluid administration. We hypothesized that a restrictive fluid administration in the intra – operative period would be associated with a lower incidence of venous congestion in patients undergoing free flap reconstruction of traumatic defects of the extremities. All patients undergoing a perforator free flap soft tissue reconstruction of traumatic defects of the extremities, from 2005 to 2019 were retrospectively identified. Patient's demographics, comorbidities and technical aspects of the operation were extracted. The study population was divided in two groups based on the amount of fluids administered (restrictive: < 6 ml/kg/hr; liberal: ≥ 6 ml/kg/hr). Multivariate analyses were performed to identify the impact of fluid strategy on the development of clinically significant venous congestion. A total of 75 patients were identified. Out of these, 24 patients had clinically significant venous congestion. Fluid administration strategy [AOR (95% CI): 1.53 (1.22, 1.92)], use of the superficial venous system [0.03 (0.01, 0.26)], operative time [1.98 (1.97, 1.99)] and age>50 [5.60 (1.10, 28.52)]. A cut – off analysis identified 6 ml/kg/hr as the cut off point for fluid administration. Liberal fluid administration (≥6 ml/kg/hr) was independently associated with a higher incidence of venous congestion and return to the OR for flap debridement, both overall and after exclusion of anastomotic revisions. Venous congestion in free flap reconstruction following traumatic defects of the extremities remains high. Several factors are associated with congestion. Liberal fluid administration ≥6 ml/kg/hr is independently associated with this complications and should be avoided when possible. • Free Fasciocutaneous tissue transfer in lower extremity trauma is challenging. • Venous congestion can result in complete or partial flap loss. • Peri – operative fluid administration has been shown to increase the complication rate infree flaps. • Fluid administration intra – operative of more than 6 ml/kg/hr resulted in a higher incidence of venous congestion. • Judicious fluid administration may be warranted.

Wet versus dry fluid protocols in adult patients undergoing unilateral orthopedic lower limb surgery under spinal anesthesia

BackgroundOptimal strategy for peri operative fluid therapy remains controversial and uncertain. We compared two different fluid administration protocols (dry/wet) on the hemodynamic variables in adult patients under spinal anesthesia. We hypothesized that both protocols had the same effect.Patients and methodsA randomized controlled double-blind study was conducted in Assiut University Hospitals and was carried out on 80 adult patients scheduled for unilateral lower limb surgery under intrathecal anesthesia. Group I included 40 patients who were subjected to 'dry' approach of intraoperative 4–6 ml/kg/h of Ringer's lactate starting from conduction of intrathecal anesthesia. Group II included 40 patients who were subjected to 'wet' approach of intraoperative 18–20 ml/kg/h of Ringer's lactate starting from conduction of intrathecal anesthesia.ResultsBoth groups are comparable and had no statistically significant differences regarding the demographic data, preoperative investigations, hemodynamic variables, and oxygen saturation. The wet group revealed insignificantly higher intraoperative blood loss. The total intravenous fluid intake was significantly higher in the wet group compared with the dry group (1860±599.77 vs. 716.66±295.75 ml, respectively; P<0.001). No major complications were observed during the whole study period.ConclusionThe use of the terms 'wet' or 'dry' fluid administration strategies does not precisely define the optimal volume of fluid needed, and continuous monitoring of hemodynamics is essential.

Individualized Fluid Management Using the Pleth Variability Index: A Randomized Clinical Trial.

The present trial was designed to assess whether individualized strategies of fluid administration using a noninvasive plethysmographic variability index could reduce the postoperative hospital length of stay and morbidity after intermediate-risk surgery. This was a multicenter, randomized, nonblinded parallel-group clinical trial conducted in five hospitals. Adult patients in sinus rhythm having elective orthopedic surgery (knee or hip arthroplasty) under general anesthesia were enrolled. Individualized hemodynamic management aimed to achieve a plethysmographic variability index under 13%, and the standard management strategy aimed to maintain a mean arterial pressure above 65 mmHg during general anesthesia. The primary outcome was the postoperative hospital length of stay decided by surgeons blinded to the group allocation of the patient. In total, 447 patients were randomized, and 438 were included in the analysis. The mean hospital length of stay ± SD was 6 ± 3 days for the plethysmographic variability index group and 6 ± 3 days for the control group (adjusted difference, 0.0 days; 95% CI, -0.6 to 0.5; P = 0.860); the theoretical postoperative hospital length of stay was 4 ± 2 days for the plethysmographic variability index group and 4 ± 1 days for the control group (P = 0.238). In the plethysmographic variability index and control groups, serious postoperative cardiac complications occurred in 3 of 217 (1%) and 2 of 224 (1%) patients (P = 0.681), acute postoperative renal failure occurred in 9 (4%) and 8 (4%) patients (P = 0.808), the troponin Ic concentration was more than 0.06 μg/l within 5 days postoperatively for 6 (3%) and 5 (2%) patients (P = 0.768), and the postoperative arterial lactate measurements were 1.44 ± 1.01 and 1.43 ± 0.95 mmol/l (P = 0.974), respectively. Among intermediate-risk patients having orthopedic surgery with general anesthesia, fluid administration guided by the plethysmographic variability index did not shorten the duration of hospitalization or reduce complications.

The Impact of Different Intraoperative Fluid Administration Strategies on Postoperative Extubation Following Multilevel Thoracic and Lumbar Spine Surgery: A Propensity Score Matched Analysis.

Patients undergoing multilevel spine surgery are at risk for delayed extubation. To evaluate the impact of type and volume of intraoperative fluids administered during multilevel thoracic and/or lumbar spine surgery on postoperative extubation status. Retrospective evaluation of medical records of patients≥18 yr undergoing≥4 levels of thoracic and/or lumbar spine fusions was performed. Patients were organized according to postoperative extubation status: immediate (IMEX; in OR/PACU) or delayed (DEX; outside OR/PACU). Propensity score matched (PSM) analysis was performed to compare IMEX and DEX groups. Volume, proportion, and ratios of intraoperative fluids administered were evaluated for the associated impact on extubation status. A total of 246 patients (198 IMEX, 48 DEX) were included. PSM analysis demonstrated that increased administration of non-cell saver blood products (NCSB) and increased ratio of crystalloid: colloids infused were independently associated with delayed extubation. With increasing EBL, IMEX had a proportionate reduction in crystalloid infusion (R=-0.5, P<.001), while the proportion of crystalloids infused remained relatively unchanged for DEX (R=-0.27; P=.06). Twenty-six percent of patients receiving crystalloid: colloid ratio>3:1 had DEX compared to none of those receiving crystalloid: colloid ratio≤3:1 (P=.009). DEX had greater cardiac and pulmonary complications, surgical site infections and prolonged intensive care unit and hospital stay (P<.05). PSM analysis of patients undergoing multilevel thoracic and/or lumbar spine fusion demonstrated that increased administration of crystalloid to colloid ratio is independently associated with delayed extubation. With increasing EBL, a proportionate reduction of crystalloids facilitates early extubation.

Postoperative renal impairment is associated with increased length of stay for incisional hernia repair after liver transplantation

BackgroundIncisional hernia repair is the most common procedure after orthotopic liver transplantation. Although enhanced recovery protocols are increasingly employed, the post–orthotopic liver transplantation patient may not benefit from all aspects of these models. The aim of the present study is to assess which perioperative interventions and patient factors affect hospital length of stay in a cohort of post–orthotopic liver transplantation patients undergoing incisional hernia repair. MethodsWe conducted a retrospective review of a series of adult patients undergoing incisional hernia repair after orthotopic liver transplantation. The primary endpoint was length of stay. Results were stratified by demographic, intraoperative, and postoperative variables. ResultsEleven percent (172/1523) of patients who received orthotopic liver transplantation during the study period underwent subsequent incisional hernia repair. Median length of stay was 5 days (range 2–50). The strongest predictor of length of stay was postoperative renal function. Despite liberal intraoperative administration of volume (median 642 mL/h) and brisk intraoperative urine output (median 72 mL/h), postoperative acute kidney injury occurred in 48% of patients. Those that developed acute kidney injury received less intraoperative volume (6 vs 8.5 mL/kg/h; P = .031) and the severity of postoperative renal injury was inversely related to the amount intraoperative volume given. ConclusionsIn patients undergoing incisional hernia repair after orthotopic liver transplantation, postoperative renal function is frequently impaired. Although many aspects of current ERAS protocols may be applied to post-transplant patients, restrictive intraoperative fluid administration strategies should be employed with caution given a high propensity for the development of post-operative acute kidney injury in this complex population.

The effects of perioperative intravenous fluid administration strategy on renal outcomes in patients undergoing cardiovascular surgery: An observational study.

We assessed whether perioperative fluid management with balanced solutions and a limited volume of hydroxyethyl starch (renal-protective fluid management [RPF] strategy) could improve renal outcomes after cardiovascular surgery.For this retrospective observational study, we evaluated 2613 patients who underwent cardiovascular surgery from January 1, 2010 to December 31, 2013. The control group were given intravenous fluids with saline-based solutions and unlimited volumes of hydroxyethyl starch solutions and the RPF group were given intravenous fluids with RPF. The primary outcome was the incidence of acute kidney injury (AKI) and chronic dialysis within 12 months after cardiovascular surgery. Multivariable regression and propensity analyses were performed to evaluate the association between perioperative fluid management strategy and postoperative renal outcomes.Postoperative AKI and chronic dialysis occurred in 213 (21.2%) and 5 (0.5%) patients in the RPF group compared with 696 (43.2%) and 38 (2.4%) patients in the control group, respectively. After adjustment, the RPF group was linked to a decreased risk of postoperative AKI, severe AKI, persistent AKI, use of renal replacement therapy, chronic kidney disease, chronic dialysis, and a shorter postoperative extubation time and intensive care unit, and hospital stay duration.The perioperative fluid management strategy with balanced solutions and a limited volume of hydroxyethyl starch was related to improved acute and 1-year renal and clinical outcomes after cardiovascular surgery. These findings indicate the need for further definitive clinical trials on perioperative fluid management strategy.

Fluid administration strategies in traumatic brain injury

Fluid restriction strategies may reduce morbidity and mortality in critical care patients and are currently trending as preliminary data showed encouraging results. A positive fluid balance was related to increase morbidity and mortality in a variety of disorders (i.e., sepsis, acute respiratory distress syndrome, and postsurgical cases) as well as resulted in an increased rate of complications observed in the intensive care unit setting. Traumatic brain injury (TBI) has been managed thus far in terms of fluid resuscitation under the concept of general trauma resuscitation recommendations that favored euvolemia above all fluid balance states. Notwithstanding, scarce data exist to clarify details about fluid management strategies in TBI such as the desirable fluid balance per se and/or its impact on patients' outcomes. We, therefore, reviewed previously published data and concluded in an observational manner (by creating a visual display model) that a highly positive and/or a negative fluid balance may have a detrimental impact on the prognosis of TBI patients. Accordingly, well-designed randomized controlled trials are clearly required to investigate further and in detail the most efficacious fluid administration strategies in TBI contributing thus in the rapidly expanding field of neurocritical care.

Postoperative Renal Impairment is Associated with Increased Length of Stay for Incisional Hernia Repair after Liver Transplantation

Background: Incisional hernia repair (IHR) is the most common procedure after orthotopic liver transplantation (OLT). Although enhanced recovery protocols are increasingly employed, the post-OLT patient may not benefit from all aspects of these models. The aim of the present study is to assess which perioperative interventions and patient factors effect hospital length of stay in a cohort of post-OLT patients undergoing IHR. Methods: We conducted a retrospective review of a series of adult patients undergoing IHR after OLT. The primary endpoint was length of stay. Results were stratified by demographic, intraoperative, and postoperative variables. Results: 172/1523 (11%) patients who received OLT during the study period underwent subsequent IHR. Median length of stay was 5 days (range 2-50). The strongest predictor of length of stay was postoperative renal function. Despite liberal intraoperative administration of volume (median 642 ml/hr) and brisk intraoperative urine output (median 72ml/hr), postoperative acute kidney injury (AKI) occurred in 48% of patients. Those that developed AKI received less intraoperative volume (6 ml/kg/hr vs 8.5 ml/kg/hr; p=0.031) and the severity of postoperative renal injury was inversely related to intraoperative volume. Conclusions: In patients undergoing IHR after OLT, postoperative renal function is frequently impaired. This finding is likely owed to the enterohepatic circulation of nephrotoxic immunosuppression. Although many aspects of current ERAS protocols may be applied to post-transplant patients, restrictive intraoperative fluid administration strategies should be employed with caution given a high propensity for the development of post-operative AKI in this complex population.

Population-based volume kinetics of Ringer's lactate solution in patients undergoing open gastrectomy.

In order to maintain stable blood pressure and heart rate during surgery, anesthesiologists need to administer the appropriate amount of fluid with appropriate fluid type to the patient, then quantifying how fluid is distributed and eliminated from the body is useful for establishing a fluid administration strategy. In this study we characterized the volume kinetics of Ringer's lactate solution in patients undergoing open gastrectomy. When propofol and remifentanil reached a pseudosteady state at the target concentration and blood pressure was stabilized following surgical stimulation, enrolled patients were administered 1000 mL of Ringer's lactate solution for 20 min, followed by continuous infusion at a rate of 6 mL/kg/h until the time of the last blood collection for volume kinetic analysis. Arterial blood samples were collected to measure the hemoglobin concentration at different time points. The change in hemoglobin-derived plasma dilution induced by the administration of Ringer's lactate solution was evaluated by nonlinear mixed effects modeling. Three hundred and twenty-three plasma dilution data points from 27 patients were used to determine the pharmacokinetic characteristics of Ringer's lactate solution. A two-volume model best described the pharmacokinetics of Ringer's lactate solution. The mean arterial pressure (MAP) and body weight (WT) were significant covariates for the elimination clearance (kr) and central volume of distribution at baseline (Vc0), respectively. The parameter estimates were as follows: kr (mL/min) = 124 + (MAP/70)14.2, Vc0 (mL) = 0.95 + 3440 × (WT/63), Vt0 (mL) = 2730, and kt (mL/min) = 181. A higher MAP was associated with a greater elimination clearance and, consequently, less water accumulation in the interstitium. As body weight increases, volume expansion in the blood vessels increases.

Association between fluid management and dilutional coagulopathy in severe postpartum haemorrhage: a nationwide retrospective cohort study

BackgroundThe view that 2 l of crystalloid and 1.5 l of colloid can be infused while awaiting compatible blood for patients with major postpartum haemorrhage is based on expert opinion documents. We describe real-world changes in levels of coagulation parameters after the administration of different volumes of clear fluids to women suffering from major postpartum haemorrhage.MethodsWe performed a nationwide retrospective cohort study in the Netherlands among 1038 women experiencing severe postpartum haemorrhage who had received at least four units of red cells or fresh frozen plasma or platelets in addition to red cells. The volume of clear fluids administered before the time of blood sampling was classified into three fluid administration strategies, based on the RCOG guideline: < 2 L, 2–3.5 L and > 3.5 L. Outcomes included haemoglobin, haematocrit, platelet count, fibrinogen, aPTT and PT levels.ResultsHaemoglobin, haematocrit, platelet count, fibrinogen and aPTT were associated with volumes of clear fluids, which was most pronounced early during the course of postpartum haemorrhage. During the earliest phases of postpartum haemorrhage median haemoglobin level was 10.1 g/dl (IQR 8.5–11.6) among the women who received < 2 L clear fluids and 8.1 g/dl (IQR 7.1–8.4) among women who received > 3.5 L of clear fluids; similarly median platelet counts were 181 × 109/litre (IQR 131–239) and 89 × 109/litre (IQR 84–135), aPTT 29 s (IQR 27–33) and 38 s (IQR 35–55) and fibrinogen 3.9 g/L (IQR 2.5–5.2) and 1.6 g/L (IQR 1.3–2.1).ConclusionsIn this large cohort of women with severe postpartum haemorrhage, administration of larger volumes of clear fluids was associated with more severe deterioration of coagulation parameters corresponding to dilution. Our findings provide thus far the best available evidence to support expert opinion-based guidelines recommending restrictive fluid resuscitation in women experiencing postpartum haemorrhage.Trial registrationNetherlands Trial Register (NTR4079), registration date July 17, 2013.