1
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Park M, Sidebotham D. Metabolic alkalosis and mixed acid-base disturbance in anaesthesia and critical care. BJA Educ 2023; 23:128-135. [PMID: 36960435 PMCID: PMC10028421 DOI: 10.1016/j.bjae.2023.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/12/2023] [Indexed: 02/25/2023] Open
Affiliation(s)
- M. Park
- Te Matau a Maui Hawke's Bay, Hastings, New Zealand
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2
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Wolf MB. Physicochemical properties of abnormal blood acid-base buffering. J Appl Physiol (1985) 2023; 134:172-180. [PMID: 36519570 DOI: 10.1152/japplphysiol.00309.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
This paper describes two new features 1) development of physicochemically based, two-compartment models describing acid-base-state changes in normal and abnormal blood and 2) use of model results to view and describe physicochemical properties of blood, in terms of Pco2 as the causative independent variable and effected [H+] changes as the dependent variable. Models were derived from an in vitro experimental study, where normal blood was made both hypoproteinemic and hyperalbuminemic and then equilibrated with CO2. Strong-ion gap (SIG) values were selected to match model and experimental pH. The effect of individual physicochemical factors affecting blood acid-base-state were evaluated from their induced changes on buffer curve linearized slope (βH+) and [H+] curve shift at 40 mmHg ([H+]40). Model findings were: 1) in severe hypoproteinemia, hemoglobin enhances buffering (decreases βH+), whereas albumin compromises it, resulting in an almost unchanged βH+; [H+]40 decreases (alkalemia) due to hypoalbuminemia. 2) Severe hyperalbuminemia greatly increases both βH+ and [H+]40, hence, compromising buffering and causing a severe acidemia. 3) Pco2-induced changes in the electrical-charge concentration of hemoglobin are the principal factor responsible for maintaining normal buffering characteristics in hypoproteinemia and hyperalbuminemia. 4) SIG values are a third Pco2-independent characteristic of blood acid-base state and 5) the quantities, βH+, [H+]40, and SIG, derived from a [H+] vs. Pco2 perspective, are a more informative and intuitive way to characterize blood acid-base state.NEW & NOTEWORTHY This study represents the most up-to-date, physicochemical, multi-compartment computer model of the processes involved in determining the acid-base buffering state of blood. Previous models lack this capability, notably by being single compartment and/or lacking electroneutrality and osmotic constraints. Model results, analyzed from a different perspective of dependent [H+] changes resulting from independent Pco2 changes, provide a new set of Pco2-independent parameters, characteristic of blood buffering properties.
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Affiliation(s)
- Matthew B Wolf
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine-Columbia, Columbia, South Carolina
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3
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Kopp BJ, Lenney M, Erstad BL. Balanced Salt Solutions for Critically Ill Patients: Nonplused and Back to Basics. Ann Pharmacother 2022; 56:1365-1375. [PMID: 35392676 DOI: 10.1177/10600280221084380] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVES The purpose of this article is to summarize the results of major randomized controlled trials (RCTs) comparing clinical outcomes of critically ill patients treated with normal saline (NS) or balanced salt solutions (BSSs), address discordant results of these studies, and provide direction for future investigations. DATA SOURCES PubMed (2011 to January 2022) with bibliographies of retrieved articles searched for additional articles. STUDY SELECTION AND DATA EXTRACTION RCTs comparing NS and BSSs in critically ill adult patients. DATA SYNTHESIS Recently published large RCTs comparing NS with BSSs in heterogeneous populations of intensive care unit patients did not find significant differences in mortality, despite positive findings in some end points in prior RCTs. However, there were a number of methodologic issues common to the RCTs including: varying study designs and end points, clinician discretion for the majority or all treatments other than the primary intervention fluid, heterogeneous patients with varying levels of acuity, and lack of power to investigate potential subgroup differences. In addition, there were problematic issues related to blinding and use of nonstudy fluids. RELEVANCE TO PATIENT CARE AND CLINICAL PRACTICE Intravenous fluids are a mainstay of supportive care for critically ill patients. Similar to the so-called crystalloid-colloid debate, there has been a long-standing debate among critical care clinicians and researchers concerning the preferred crystalloid solution, NS versus one of the available BSSs. CONCLUSIONS Despite the recent publication of large multicenter RCTs, the preferred resuscitation fluid, NS or a BSS, for critically ill patients is still open for debate, although the available investigations do provide some direction for clinicians and for future investigations.
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Affiliation(s)
- Brian J Kopp
- Surgical-Trauma ICU, Banner-University Medical Center, Tucson, AZ, USA
| | - Morgan Lenney
- PGY2 Critical Care Resident, Banner-University Medical Center, Tucson, AZ, USA
| | - Brian L Erstad
- Department of Pharmacy Practice & Science, College of Pharmacy, University of Arizona, Tucson, AZ, USA
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4
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Crosignani A, Spina S, Marrazzo F, Cimbanassi S, Malbrain MLNG, Van Regenemortel N, Fumagalli R, Langer T. Intravenous fluid therapy in patients with severe acute pancreatitis admitted to the intensive care unit: a narrative review. Ann Intensive Care 2022; 12:98. [PMID: 36251136 PMCID: PMC9576837 DOI: 10.1186/s13613-022-01072-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 10/11/2022] [Indexed: 11/26/2022] Open
Abstract
Patients with acute pancreatitis (AP) often require ICU admission, especially when signs of multiorgan failure are present, a condition that defines AP as severe. This disease is characterized by a massive pancreatic release of pro-inflammatory cytokines that causes a systemic inflammatory response syndrome and a profound intravascular fluid loss. This leads to a mixed hypovolemic and distributive shock and ultimately to multiorgan failure. Aggressive fluid resuscitation is traditionally considered the mainstay treatment of AP. In fact, all available guidelines underline the importance of fluid therapy, particularly in the first 24–48 h after disease onset. However, there is currently no consensus neither about the type, nor about the optimal fluid rate, total volume, or goal of fluid administration. In general, a starting fluid rate of 5–10 ml/kg/h of Ringer’s lactate solution for the first 24 h has been recommended. Fluid administration should be aggressive in the first hours, and continued only for the appropriate time frame, being usually discontinued, or significantly reduced after the first 24–48 h after admission. Close clinical and hemodynamic monitoring along with the definition of clear resuscitation goals are fundamental. Generally accepted targets are urinary output, reversal of tachycardia and hypotension, and improvement of laboratory markers. However, the usefulness of different endpoints to guide fluid therapy is highly debated. The importance of close monitoring of fluid infusion and balance is acknowledged by most available guidelines to avoid the deleterious effect of fluid overload. Fluid therapy should be carefully tailored in patients with severe AP, as for other conditions frequently managed in the ICU requiring large fluid amounts, such as septic shock and burn injury. A combination of both noninvasive clinical and invasive hemodynamic parameters, and laboratory markers should guide clinicians in the early phase of severe AP to meet organ perfusion requirements with the proper administration of fluids while avoiding fluid overload. In this narrative review the most recent evidence about fluid therapy in severe AP is discussed and an operative algorithm for fluid administration based on an individualized approach is proposed.
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Affiliation(s)
- Andrea Crosignani
- School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy.,Department of Anaesthesia and Critical Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Stefano Spina
- School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy.,Department of Anaesthesia and Critical Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Francesco Marrazzo
- School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy.,Department of Anaesthesia and Critical Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Stefania Cimbanassi
- General Surgery and Trauma Team, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Manu L N G Malbrain
- First Department of Anaesthesia and Intensive Therapy, Medical University of Lublin, Lublin, Poland.,International Fluid Academy, Lovenjoel, Belgium
| | - Niels Van Regenemortel
- Department of Intensive Care Medicine, Antwerp University Hospital, Antwerp, Belgium.,Department of Intensive Care Medicine, Ziekenhuis Netwerk Antwerpen Campus Stuivenberg, Antwerp, Belgium
| | - Roberto Fumagalli
- School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy.,Department of Anaesthesia and Critical Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Thomas Langer
- School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy. .,Department of Anaesthesia and Critical Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy.
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5
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Cassina T, Villa M, Soldani-Agnello A, Zini P. Comparison of two regional citrate anticoagulation modalities for continuous renal replacement therapy by a prospective analysis of safety, workload, effectiveness, and cost. Minerva Anestesiol 2021; 87:1309-1319. [PMID: 34527405 DOI: 10.23736/s0375-9393.21.15559-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Currently, regional citrate anticoagulation (RCA) is the preferred approach for continuous renal replacement therapy (CRRT), and several RCA protocols are commercially available. This study was aimed at comparing two RCA modalities for CRRT in terms of safety, workload, effectiveness, and costs. METHODS We prospectively evaluated two different RCA approaches in patients admitted to our intensive care unit (ICU) who needed CRRT. Patients with acute liver failure were excluded. We compared a hypertonic sodium-citrate solution 136 mmol/L added before the filter as anticoagulant during bicarbonate continuous hemodialysis (RCA-CVVHD) versus citrate-buffered replacement fluid 13.3 mmol/L infused by predilution setting in continuous venovenous hemofiltration (RCA-CVVH). Alkalosis, calcium homeostasis, nursing workload, filter lifespan, urea-creatinine metabolic control, and costs were recorded. RESULTS Forty-five and 31 patients who underwent RCA-CVVH and RCA-CVVHD, respectively, were included. Alkalosis-free time distributions were significantly different in favor of a higher alkalosis incidence in the RCA-CVVHD group (log-rank test χ2(1)=8.18, P=0.004). Multivariable analysis showed that RCA-CVVHD was associated with a longer filter lifespan (HR=0.47; 95% CI: 0.28-0.78), higher total cost (1362 CHF [782-1901] vs. 976 CHF [671-1353], P<0.001), and higher number of anticoagulation adjustments (9 [IQR, 4-14] vs. 2 [IQR, 1-4]). The mean urea and creatinine reduction ratios at the first 24 hours were significantly higher in the RCA-CVVHD group. Calcium homeostasis and filter downtime were similar in the two groups. CONCLUSIONS Pre-filter hypertonic sodium-citrate solution (136 mmol/L) results in longer filter patency and improves depuration effectiveness. However, compared to RCA-CVVHF, it causes metabolic alkalosis and increases nursing interventions and cost.
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Affiliation(s)
- Tiziano Cassina
- Department of Cardiac Anesthesiology and Intensive Care, Cardiocentro Ticino, Lugano, Switzerland
| | - Michele Villa
- Department of Cardiac Anesthesiology and Intensive Care, Cardiocentro Ticino, Lugano, Switzerland -
| | - Annalisa Soldani-Agnello
- Department of Cardiac Anesthesiology and Intensive Care, Cardiocentro Ticino, Lugano, Switzerland
| | - Piergiorgio Zini
- Department of Cardiac Anesthesiology and Intensive Care, Cardiocentro Ticino, Lugano, Switzerland
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6
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Raman S, Schibler A, Marsney RL, Trnka P, Kennedy M, Mattke A, Gibbons K, Schlapbach LJ. 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. Trials 2021; 22:427. [PMID: 34217337 PMCID: PMC8254328 DOI: 10.1186/s13063-021-05376-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 06/15/2021] [Indexed: 02/05/2023] Open
Abstract
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. Supplementary Information The online version contains supplementary material available at 10.1186/s13063-021-05376-5.
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Affiliation(s)
- Sainath Raman
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia. .,Paediatric Intensive Care Unit, Queensland Children's Hospital, South Brisbane, Australia.
| | - Andreas Schibler
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia.,Paediatric Intensive Care Unit, Queensland Children's Hospital, South Brisbane, Australia
| | - Renate Le Marsney
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia
| | - Peter Trnka
- Paediatric Nephrology, Queensland Children's Hospital, South Brisbane, Australia
| | - Melanie Kennedy
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia.,Paediatric Intensive Care Unit, Queensland Children's Hospital, South Brisbane, Australia
| | - Adrian Mattke
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia.,Paediatric Intensive Care Unit, Queensland Children's Hospital, South Brisbane, Australia
| | - Kristen Gibbons
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia
| | - Luregn J Schlapbach
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, 62 Graham Street, South Brisbane, QLD, 4101, Australia.,Paediatric Intensive Care Unit, Queensland Children's Hospital, South Brisbane, Australia.,Department of Intensive Care and Neonatology, Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
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7
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Pannu AK, Sharma R, Sharma N, Kaur J, Walia R, Kumar S. Stewart (physicochemical) approach versus conventional anion gap approach for resolution of metabolic acidosis in diabetic ketoacidosis. Int J Diabetes Dev Ctries 2021. [DOI: 10.1007/s13410-021-00927-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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8
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Kilic O, Gultekin Y, Yazici S. The Impact of Intravenous Fluid Therapy on Acid-Base Status of Critically Ill Adults: A Stewart Approach-Based Perspective. Int J Nephrol Renovasc Dis 2020; 13:219-230. [PMID: 33061531 PMCID: PMC7534048 DOI: 10.2147/ijnrd.s266864] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/14/2020] [Indexed: 12/25/2022] Open
Abstract
One of the most important tasks of physicians working in intensive care units (ICUs) is to arrange intravenous fluid therapy. The primary indications of the need for intravenous fluid therapy in ICUs are in cases of resuscitation, maintenance, or replacement, but we also load intravenous fluid for purposes such as fluid creep (including drug dilution and keeping venous lines patent) as well as nutrition. However, in doing so, some facts are ignored or overlooked, resulting in an acid-base disturbance. Regardless of the type and content of the fluid entering the body through an intravenous route, it may impair the acid-base balance depending on the rate, volume, and duration of the administration. The mechanism involved in acid-base disturbances induced by intravenous fluid therapy is easier to understand with the help of the physical-chemical approach proposed by Canadian physiologist, Peter Stewart. It is possible to establish a quantitative link between fluid therapy and acid–base disturbance using the Stewart principles. However, it is not possible to accomplish this with the traditional approach; moreover, it may not be noticed sometimes due to the normalization of pH or standard base excess induced by compensatory mechanisms. The clinical significance of fluid-induced acid-base disturbances has not been completely clarified yet. Nevertheless, as fluid therapy may be the cause of unexplained acid-base disorders that may lead to confusion and elicit unnecessary investigation, more attention must be paid to understand this issue. Therefore, the aim of this paper is to address the effects of different types of fluid therapies on acid-base balance using the simplified perspective of Stewart principles. Overall, the paper intends to help recognize fluid-induced acid-base disturbance through bedside evaluation and choose an appropriate fluid by considering the acid-base status of a patient.
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Affiliation(s)
- Ozgur Kilic
- Siyami Ersek Thoracic and Cardiovascular Surgery Center, Cardiology Department, Cardiac Intensive Care Unit, Istanbul, Turkey
| | - Yucel Gultekin
- Mersin University Hospital, General Surgery Department, Mersin, Turkey
| | - Selcuk Yazici
- Siyami Ersek Thoracic and Cardiovascular Surgery Center, Cardiology Department, Cardiac Intensive Care Unit, Istanbul, Turkey
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9
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Verma A, Qayyum R. Non-lactate strong ion difference and cardiovascular, cancer and all-cause mortality. Clin Chem Lab Med 2020; 59:403-409. [PMID: 32853162 DOI: 10.1515/cclm-2020-0233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 08/06/2020] [Indexed: 11/15/2022]
Abstract
Objectives Non-lactate strong ion difference (SID) has been shown to be associated with predictors of mortality in intensive care unit. However, the existence of any association between non-lactate SID (nlSID) and all cause, cardiovascular and cancer mortality has not been explored before in community dwelling US adults. Methods In a nationally representative cross-sectional survey of the US non-institutionalized population, all adult participants (≥20 years of age) using National Health and Nutrition Examination Survey data (1999-2010) combined with National Death Index for mortality status through December 2011. Cox proportional hazard models were built to estimate the hazard ratios for cardiovascular, cancer, and all-cause mortality for each unit increase in non-lactate SID. The models were adjusted for demographic and confounder variables. Results In the study population the mean (SD) age was 49.6 (18.4) years. Of the study population, 31,475 (91.5%) were alive and 2,893 (8.4%) died during the mean (SD) follow-up period of 5.5 (3.5) years. In univariate regression model using nlSID as continuous variable, we found 2% (unadjusted hazard ratio, HR=1.02; 95% CI, 1.004-1.05) increase in all-cause but not in cardiovascular and cancer mortality (HR=1.03; 95% CI, 0.99-1.08, HR=1.01; 95% CI, 0.97-1.06). After adjusting for potential confounders, we found 7% (adjusted HR=1.07; 95% CI, 1.04-1.10), 5% (HR=1.05; 95% CI, 1.00-1.11) and 7% (HR=1.07; 95% CI, 1.02-1.12) increase in all-cause, cardiovascular, and cancer mortality. Conclusions A high nlSID is associated with an increase in cardiovascular, cancer and all-cause mortality and may be a prognostic indicator of mortality in general adult population. These findings may provide a point of reference for further studies.
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Affiliation(s)
- Ashish Verma
- Renal Division, Brigham and Women's Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - Rehan Qayyum
- Division of Hospital Medicine, Virginia Commonwealth University, Richmond, VA, USA
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10
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Morgan TJ. Reducing complexity in acid-base diagnosis - how far should we go? J Clin Monit Comput 2019; 34:17-20. [PMID: 31079292 DOI: 10.1007/s10877-019-00319-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 11/28/2022]
Abstract
PURPOSE To place in context the potential value of isolated plasma strong ion difference (SID) calculations and strong ion gap (SIG) calculations versus suggested cut-down versions such as SIDa adj and the BICgap respectively. METHODS Stewart's physical chemical approach is seen as a mathematical model of isolated plasma not displacing traditional Copenhagen and Boston approaches. Scanning tools for unmeasured ions based on the Principle of Electrical Neutrality such as the SIG and suggested cut-down versions such as the albumin adjusted anion gap and the BICgap are evaluated for accuracy and clinical usefulness. RESULTS Plasma SID and abbreviations such as SIDa adj are not independent variables in vivo since they vary with PCO due to Gibbs Donnan ion traffic. They can also exhibit positive and negative bias, and SID values must be partnered with non-volatile weak acid concentrations when evaluating metabolic acid-base status. The BICgap calculation is a cut down version of the SIG fixed for pH 7.4. It includes phosphate but is otherwise similar in form to the albumin corrected anion gap, with similar sensitivity and specificity characteristics. CONCLUSIONS Clinicians are unlikely to find SID calculations or cut-down versions such as the SIDa adj clinically useful. The albumin corrected anion gap is in current use and easily determined by mental arithmetic from point of care anion gap printouts plus recent plasma albumin measurements. Any slight advantage of the BICgap would be offset by the complexity of its calculation.
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Affiliation(s)
- Thomas J Morgan
- Intensive Care Unit, Mater Health Services, Mater Research-University of Queensland, Stanley Street, South Brisbane, QLD, 4101, Australia.
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11
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Valentine S. Multidisciplinary Approach to Placenta Percreta: An Observational Case Study. J Perianesth Nurs 2019; 34:483-490. [PMID: 30665745 DOI: 10.1016/j.jopan.2018.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 11/05/2018] [Accepted: 11/11/2018] [Indexed: 10/27/2022]
Abstract
Abnormal placental implantations can result in postpartum hemorrhage and poor outcomes. With proper diagnosis and preplanning, complications can be minimized and aligned with maternal wishes of abstaining from blood and blood product transfusions.
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12
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Lee NM, Deriy L, Petersen TR, Shah VO, Hutchens MP, Gerstein NS. Impact of Isolyte Versus 0.9% Saline on Postoperative Event of Acute Kidney Injury Assayed by Urinary [TIMP-2] × [IGFBP7] in Patients Undergoing Cardiac Surgery. J Cardiothorac Vasc Anesth 2018; 33:348-356. [PMID: 30181085 DOI: 10.1053/j.jvca.2018.07.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Administration of excess chloride in 0.9% normal saline (NS) decreases renal perfusion and glomerular filtration rate, thereby increasing the risk for acute kidney injury (AKI). In this study, the effect of NS versus Isolyte use during cardiac surgery on urinary levels of tissue inhibitor of metalloproteinase 2 and insulin-like growth factor-binding protein 7 [TIMP-2] × [IGFBP7] and postoperative risk of AKI were examined. DESIGN Prospective, randomized, and single-blinded trial. SETTING Single university medical center. PARTICIPANTS Thirty patients over 18 years without chronic renal insufficiency or recent AKI undergoing elective cardiac surgery. INTERVENTIONS Subjects were randomized to receive either NS or Isolyte during the intraoperative period. MEASUREMENTS AND MAIN RESULTS The primary outcome was the change in urinary levels of [TIMP2] × [IGFBP7] from before surgery to 24 hours postoperatively. Secondary outcomes included serum creatinine pre- and postoperatively at 24 and 48 hours, serum chloride pre- and postoperatively at 24 and 48 hours, need for dialysis prior to discharge, and arterial pH measured 24 hours postoperatively. Sixteen patients received NS and 14 patients received Isolyte. Three patients developed AKI within the first 3 postoperative days, all in the NS group. The authors found increases in [TIMP-2] × [IGFBP7] in both groups. However, the difference in this increase between study arms was not significant (p = 0.92; -0.097 to 0.107). CONCLUSION The authors observed no change in urinary [TIMP-] × [IGFBP7] levels in patients receiving NS versus Isolyte during cardiac surgery. Future larger studies in patients at higher risk for AKI are recommended to evaluate the impact of high- versus lower-chloride solutions on the risk of postoperative AKI after cardiac surgery.
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Affiliation(s)
- Nathan M Lee
- Department of Anesthesiology and Critical Care Medicine, University of New Mexico School of Medicine, Albuquerque, NM
| | - Lev Deriy
- Department of Anesthesiology and Critical Care Medicine, University of New Mexico School of Medicine, Albuquerque, NM
| | - Timothy R Petersen
- Department of Anesthesiology and Critical Care Medicine, University of New Mexico School of Medicine, Albuquerque, NM
| | - Vallabh O Shah
- Department of Internal Medicine, Division of Nephrology, University of New Mexico School of Medicine, Albuquerque, NM
| | - Michael P Hutchens
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR
| | - Neal S Gerstein
- Department of Anesthesiology and Critical Care Medicine, University of New Mexico School of Medicine, Albuquerque, NM.
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13
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Kwak HJ, Lim OK, Baik JM, Jo YY. Acid/base alterations during major abdominal surgery: 6% hydroxyethyl starch infusion versus 5% albumin. Korean J Anesthesiol 2018; 71:459-466. [PMID: 29684990 PMCID: PMC6283709 DOI: 10.4097/kja.d.18.27195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 10/11/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To compare the effects of intraoperative infusions of balanced electrolyte solution (BES)-based hydroxyethyl starch (HES) and saline-based albumin on metabolic acidosis and acid/base changes during major abdominal surgery conducted using Stewart's approach. METHODS Forty patients, aged 20-65 years, undergoing major abdominal surgery, were randomly assigned to the HES group (n = 20; received 500 ml of BES-based 6% HES 130/0.4) or the albumin group (n = 20; received 500 ml of normal saline-based 5% albumin). Acid-base parameters were measured and calculated using results obtained from arterial blood samples taken after anesthesia induction (T1), 2 hours after surgery commencement (T2), immediately after surgery (T3), and 1 hour after arriving at a postanesthetic care unit (T4). RESULTS Arterial pH in the HES group was significantly higher than that in the albumin group at T3 (7.40 ± 0.04 vs. 7.38 ± 0.04, P = 0.043), and pH values exhibited significant intergroup difference over time (P = 0.002). Arterial pH was significantly lower at T3 and T4 in the HES group and at T2, T3, and T4 in the albumin group than at T1. Apparent strong ion difference (SIDa) was significantly lower at T2, T3, and T4 than at T1 in both groups. Total plasma weak nonvolatile acid (ATOT) was significantly lower in the HES group than in the albumin group at T2, T3 and T4 and exhibited a significant intergroup difference over time (P < 0.001). CONCLUSIONS BES-based 6% HES infusion was associated with lower arterial pH values at the end of surgery than saline-based 5% albumin infusion, but neither colloid caused clinically significant metabolic acidosis (defined as an arterial pH < 7.35).
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Affiliation(s)
- Hyun Jeong Kwak
- Department of Anesthesiology and Pain Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Oh Kyung Lim
- Department of Rehabilitation Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Jae Myung Baik
- Department of Anesthesiology and Pain Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Youn Yi Jo
- Department of Anesthesiology and Pain Medicine, Gachon University Gil Medical Center, Incheon, Korea
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Sethi M, Owyang CG, Meyers C, Parekh R, Shah KH, Manini AF. Choice of resuscitative fluids and mortality in emergency department patients with sepsis. Am J Emerg Med 2018; 36:625-629. [DOI: 10.1016/j.ajem.2017.09.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/12/2017] [Accepted: 09/27/2017] [Indexed: 11/30/2022] Open
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Adamik KN, Obrador R, Howard J. Comparison of acid-base and electrolyte changes following administration of 6% hydroxyethyl starch 130/0.42 in a saline and a polyionic solution in anaesthetized dogs. Vet Anaesth Analg 2018; 45:260-268. [PMID: 29506859 DOI: 10.1016/j.vaa.2017.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 11/18/2017] [Accepted: 11/29/2017] [Indexed: 01/05/2023]
Abstract
OBJECTIVE To evaluate the effects of a 6% hydroxyethyl starch (130/0.42) in either a buffered, electrolyte-balanced (HES-BAL) or saline (HES-SAL) carrier solution on electrolyte concentrations and acid-base parameters in healthy anaesthetized dogs. STUDY DESIGN Prospective randomised clinical study. ANIMALS A group of 40 client-owned dogs undergoing general anaesthesia for elective surgical procedures or diagnostic imaging. METHODS During anaesthesia, dogs were intravenously administered 15 mL kg-1 of either HES-SAL (n = 20) or HES-BAL (n = 20) over 30-40 minutes. Jugular blood samples were analysed before (T0) and 5 minutes (T5), 1 hour (T60) and 3 hours (T180) after fluid administration. Sodium, potassium, chloride, ionised calcium, phosphate, albumin, pH, venous pCO2, base excess (BE), bicarbonate and anion gap were determined and strong ion difference (SID) and total quantity of weak nonvolatile acids were calculated for each time point. RESULTS Chloride was significantly increased at T5, T60 and T180 compared with T0 after HES-SAL, and was significantly greater after HES-SAL than after HES-BAL at T5 (p = 0.042). Ionised calcium was significantly decreased at T5 compared with T0 after HES-SAL, and was significantly lower after HES-SAL than after HES-BAL at T5 (p < 0.001). Bicarbonate was significantly lower after HES-SAL than after HES-BAL at T5 (p = 0.004) and T60 (p = 0.032). BE was significantly lower after HES-SAL than after HES-BAL at T5 (p < 0.001) and T60 (p = 0.007). SID was significantly decreased after HES-SAL at T5 and T60 compared with T0, and was significantly lower after HES-SAL than after HES-BAL at T5 (p = 0.027). Mean electrolyte and acid-base parameters remained within or marginally outside of reference intervals. CONCLUSIONS AND CLINICAL RELEVANCE Changes in both groups were minor and short-lived with either fluid in healthy individuals, but might become clinically relevant with higher fluid doses or in critically ill dogs.
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Affiliation(s)
- Katja N Adamik
- Emergency and Critical Care Section, Small Animal Clinic, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
| | - Rafael Obrador
- Emergency and Critical Care Section, Small Animal Clinic, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Judith Howard
- Diagnostic Clinical Laboratory, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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van Haren F. Personalised fluid resuscitation in the ICU: still a fluid concept? CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2017; 21:313. [PMID: 29297387 PMCID: PMC5751583 DOI: 10.1186/s13054-017-1909-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The administration of intravenous fluid to critically ill patients is one of the most common, but also one of the most fiercely debated, interventions in intensive care medicine. Even though many thousands of patients have been enrolled in large trials of alternative fluid strategies, consensus remains elusive and practice is widely variable. Critically ill patients are significantly heterogeneous, making a one size fits all approach unlikely to be successful.New data from basic, animal, and clinical research suggest that fluid resuscitation could be associated with significant harm. There are several important limitations and concerns regarding fluid bolus therapy as it is currently being used in clinical practice. These include, but are not limited to: the lack of an agreed definition; limited and short-lived physiological effects; no evidence of an effect on relevant patient outcomes; and the potential to contribute to fluid overload, specifically when fluid responsiveness is not assessed and when targets and safety limits are not used.Fluid administration in critically ill patients requires clinicians to integrate abnormal physiological parameters into a clinical decision-making model that also incorporates the likely diagnosis and the likely risk or benefit in the specific patient's context. Personalised fluid resuscitation requires careful attention to the mnemonic CIT TAIT: context, indication, targets, timing, amount of fluid, infusion strategy, and type of fluid.The research agenda should focus on experimental and clinical studies to: improve our understanding of the physiological effects of fluid infusion, e.g. on the glycocalyx; evaluate new types of fluids; evaluate novel fluid minimisation protocols; study the effects of a no-fluid strategy for selected patients and scenarios; and compare fluid therapy with other interventions. The adaptive platform trial design may provide us with the tools to evaluate these types of interventions in the intrinsically heterogeneous intensive care unit population, accounting for the explicit assumption that treatment effects may be heterogeneous.
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Affiliation(s)
- Frank van Haren
- University of Canberra, Canberra, Australia. .,Australian National University, Canberra, Australia. .,Intensive Care Unit, Canberra Hospital, Canberra, Australia.
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Abstract
Damage control surgery (DCS) began as an adjunct approach to hemorrhage control, seeking to facilitate the body's innate clotting ability when direct repair or ligation was impossible, but it has since become a valuable instrument for a broader collection of critically ill surgical patients in whom metabolic dysfunction is the more immediate threat to life than imminent exsanguination. Modern damage control is a strategy that combines the principles of DCS with those of damage control resuscitation. When used correctly, damage control may improve survival in previously unsalvageable patients; when used incorrectly, it can subject patients to imprudent risk and contribute to morbidity. This review discusses the evolution of damage control in both concept and practice, summarizing available literature and experience to guide patient selection, medical decision-making, and strategy implementation throughout the preoperative, intraoperative, and early postoperative periods.
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Affiliation(s)
- Brian C Beldowicz
- Division of Military, Department of Emergency Medicine, Uniformed Services University of the Health Sciences, Sacramento, California
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18
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Myles PS, Andrews S, Nicholson J, Lobo DN, Mythen M. Contemporary Approaches to Perioperative IV Fluid Therapy. World J Surg 2017; 41:2457-2463. [PMID: 28484814 DOI: 10.1007/s00268-017-4055-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Intravenous fluid therapy is required for most surgical patients, but inappropriate regimens are commonly prescribed. The aim of this narrative review was to provide evidence-based guidance on appropriate perioperative fluid management. METHOD We did a systematic literature search of the literature to identify relevant studies and meta-analyses to develop recommendations. RESULTS Of 275 retrieved articles, we identified 25 articles to inform this review. "Normal" saline (0.9% sodium chloride) is not physiological and can result in sodium overload and hyperchloremic acidosis. Starch colloid solutions are not recommended in surgical patients at-risk of sepsis or renal failure. Most surgical patients can have clear fluids and/or administration of carbohydrate-rich drinks up to 2 h before surgery. An intraoperative goal-directed fluid strategy may reduce postoperative complications and reduce hospital length of stay. Regular postoperative assessment of the patient's fluid status and requirements should include looking for physical signs of dehydration or hypovolemia, or fluid overload. Both hypovolemia and salt and water overload lead to adverse events, complications and prolonged hospital stay. Urine output can be an unreliable indicator of hydration status in the postoperative surgical patient. Excess fluid administration has been linked to acute kidney injury, gastrointestinal dysfunction, and cardiac and pulmonary complications. CONCLUSION There is good evidence supporting the avoidance of unnecessary fasting and the value of an individualized perioperative IV fluid regimen, with transition to oral fluids as soon as possible, to help patients recover from major surgery.
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Affiliation(s)
- Paul S Myles
- Department of Anaesthesia and Perioperative Medicine, Alfred Hospital and Monash University, Commercial Road, Melbourne, VIC, 3004, Australia.
| | - Sam Andrews
- Department of Anaesthesia and Perioperative Medicine, Alfred Hospital, Melbourne, VIC, Australia
| | - Jonathan Nicholson
- Department of Anaesthesia and Perioperative Medicine, Alfred Hospital, Melbourne, VIC, Australia
| | - Dileep N Lobo
- Nottingham Digestive Diseases Centre, National Institute of Health Research (NIHR) Biomedical Research Centre, Nottingham University Hospitals and University of Nottingham, Queen's Medical Centre, Nottingham, UK
| | - Monty Mythen
- Smiths Medical Professor of Anaesthesia and Critical Care, National Institute of Health Research Biomedical Research Centre, University College London Hospitals, London, UK
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Honore PM, Spapen HD. Balanced crystalloids for the critically ill: knowledge on the rise but confusion still reigns! ANNALS OF TRANSLATIONAL MEDICINE 2017; 5:412. [PMID: 29152512 PMCID: PMC5673784 DOI: 10.21037/atm.2017.08.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Affiliation(s)
- Patrick M Honore
- ICU Department, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Herbert D Spapen
- ICU Department, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
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20
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Muir W. Effect of Intravenously Administered Crystalloid Solutions on Acid-Base Balance in Domestic Animals. J Vet Intern Med 2017; 31:1371-1381. [PMID: 28833697 PMCID: PMC5598900 DOI: 10.1111/jvim.14803] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 06/30/2017] [Accepted: 07/13/2017] [Indexed: 12/28/2022] Open
Abstract
Intravenous fluid therapy can alter plasma acid-base balance. The Stewart approach to acid-base balance is uniquely suited to identify and quantify the effects of the cationic and anionic constituents of crystalloid solutions on plasma pH. The plasma strong ion difference (SID) and weak acid concentrations are similar to those of the administered fluid, more so at higher administration rates and with larger volumes. A crystalloid's in vivo effects on plasma pH are described by 3 general rules: SID > [HCO3-] increases plasma pH (alkalosis); SID < [HCO3-] decreases plasma pH (alkalosis); and SID = [HCO3-] yields no change in plasma pH. The in vitro pH of commercially prepared crystalloid solutions has little to no effect on plasma pH because of their low titratable acidity. Appreciation of IV fluid composition and an understanding of basic physicochemical principles provide therapeutically valuable insights about how and why fluid therapy can produce and correct alterations of plasma acid-base equilibrium. The ideal balanced crystalloid should (1) contain species-specific concentrations of key electrolytes (Na+ , Cl- , K+ , Ca++ , Mg++ ), particularly Na+ and Cl- ; (2) maintain or normalize acid-base balance (provide an appropriate SID); and (3) be isosmotic and isotonic (not induce inappropriate fluid shifts) with normal plasma.
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Affiliation(s)
- W. Muir
- College of Veterinary MedicineLincoln Memorial UniversityHarrogateTN
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21
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Spoelstra–de Man AME, Smorenberg A, Groeneveld ABJ. Different effects of fluid loading with saline, gelatine, hydroxyethyl starch or albumin solutions on acid-base status in the critically ill. PLoS One 2017; 12:e0174507. [PMID: 28380062 PMCID: PMC5381890 DOI: 10.1371/journal.pone.0174507] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 03/01/2017] [Indexed: 12/02/2022] Open
Abstract
Introduction Fluid administration in critically ill patients may affect acid-base balance. However, the effect of the fluid type used for resuscitation on acid-base balance remains controversial. Methods We studied the effect of fluid resuscitation of normal saline and the colloids gelatine 4%, hydroxyethyl starch (HES) 6%, and albumin 5% on acid-base balance in 115 clinically hypovolemic critically ill patients during a 90 minute filling pressure-guided fluid challenge by a post-hoc analysis of a prospective randomized clinical trial. Results About 1700 mL was infused per patient in the saline and 1500 mL in each of the colloid groups (P<0.001). Overall, fluid loading slightly decreased pH (P<0.001) and there was no intergroup difference. This mildly metabolic acidifying effect was caused by a small increase in chloride concentration and decrease in strong ion difference in the saline- and HES-, and an increase in (uncorrected) anion gap in gelatine- and albumin-loaded patients, independent of lactate concentrations. Conclusion In clinically hypovolemic, critically ill patients, fluid resuscitation by only 1500–1700 mL of normal saline, gelatine, HES or albumin, resulted in a small decrease in pH, irrespective of the type of fluid used. Therefore, a progressive metabolic acidosis, even with increased anion gap, should not be erroneously attributed to insufficient fluid resuscitation. Trial registration ISRCTN Registry ISRCTN19023197
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Affiliation(s)
| | - Annemieke Smorenberg
- Department of Internal Medicine, Ziekenhuis Amstelland, Amstelveen, The Netherlands
- * E-mail:
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22
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Comparison of the Prognostic Significance of Initial Blood Lactate and Base Deficit in Trauma Patients. Anesthesiology 2017; 126:522-533. [DOI: 10.1097/aln.0000000000001490] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Garg P, Bishnoi AK, Patel K, Wadhawa V, Surti J, Solanki A, Shah K, Patel S. Hemodiafiltration-A Technique for Physiological Correction of Priming Solution in Pediatric Cardiac Surgery: An In Vitro Study. Artif Organs 2016; 41:773-778. [PMID: 27925243 DOI: 10.1111/aor.12830] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Pediatric cardiopulmonary bypass (CPB) circuit invariably requires priming with packed red blood cells (PRBCs). Metabolic composition of stored PRBCs is unphysiological and becomes worse with increasing duration of storage. It is recommended to correct these abnormalities before initiation of CPB. We tested the hypothesis that hemodiafiltration of the prime with 0.45% saline is sufficient for reducing the metabolic load and reaching a physiologic state. In an in vitro study, 100 mL of blood each from 45 units of PRBCs stored for 3-20 days were used for priming the 45 neonatal CPB circuits. Based upon the method used for removal of excess crystalloid from the prime, circuits were divided into three groups. Group 1: Direct removal through manifold line. Group 2: Ultrafiltration of prime. Group 3: Hemodiafiltration of the prime. Blood gas analyses were obtained from the PRBCs and from the prime before and after removal of crystalloid. Both direct removal of crystalloid and ultrafiltration resulted in significant reduction in biochemical and metabolic load of blood (P < 0.001). However, the final composition of the prime was far from being physiological. Hemodiafiltration resulted in improvement of metabolic parameters to near physiological range (lactate: 33.8 ± 4.44 vs. 14 ± 2.53 mg/dL, pH: 7.05 ± 0.15 vs. 7.34 ± 0.06, bicarbonates: 4.83 ± 0.59 vs. 27.6 ± 2.94 meq/L; P < 0.001). Similarly, sodium (147.76 ± 12.73 vs. 144.6 ± 5.96 meq/L) and potassium (9.6 ± 2.83 vs. 4.23 ± 0.37 meq/L) also changed significantly (P < 0.001) to near physiologic range. Hemodiafiltraion of final prime is a simple, efficients and rapid method of correcting the biochemical parameters and reducing the metabolic load of stored PRBCs towards the physiological range before initiating the CPB.
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Affiliation(s)
- Pankaj Garg
- Department of Cardiovascular and Thoracic Surgery, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Arvind Kumar Bishnoi
- Department of Cardiovascular and Thoracic Surgery, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Kartik Patel
- Department of Cardiovascular and Thoracic Surgery, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Vivek Wadhawa
- Department of Cardiovascular and Thoracic Surgery, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Jigar Surti
- Department of Pediatric Cardiac Anesthesia, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Atul Solanki
- Department of Perfusion, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Komal Shah
- Department of Research, U. N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, 380016, Gujarat, India
| | - Sanjay Patel
- Department of Research, U.N. Mehta Institute of Cardiology and Research Center and B.J. Medical College, New Civil Hospital, Ahmedabad, Gujarat, India
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Hashemi SJ, Heidari SM, Yaraghi A, Seirafi R. Acid-base and hemodynamic status of patients with intraoperative hemorrhage using two solution types: Crystalloid Ringer lactate and 1.3% sodium bicarbonate in half-normal saline solution. Adv Biomed Res 2016; 5:190. [PMID: 28028530 PMCID: PMC5156971 DOI: 10.4103/2277-9175.191000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 12/27/2014] [Indexed: 11/19/2022] Open
Abstract
Background: Intraoperative hemorrhage is one of the problems during surgery and, if it happens in a high volume without an immediate action to control, it can be fatal. Nowadays, various injectable solutions are used. The aim of this study was to compare the acid–base and hemodynamic status of the patient using two solutions, Ringer lactate and 1.3% sodium bicarbonate, in half saline solution. Materials and Methods: This clinical trial was performed at the Al-Zahra Hospital in 2013 on 66 patients who were randomly selected and put in two studied groups at the onset of hemorrhage. For the first group, crystalloid Ringer lactate solution and for the second group, 1.3% sodium bicarbonate in half-normal saline solution was used. Electrocardiogram, heart rate, O2 saturation non-invasive blood pressure and end-tidal CO2 were monitored. The arterial blood gas, blood electrolytes, glucose and blood urea nitrogen were measured before serum and blood injection. After the infusion of solutions and before blood transfusions, another sample was sent for measurement of blood parameters. Data were analyzed using SPSS software. Results: The mean arterial pressure was significantly higher in the second group than in the first group at some times after the infusion of solutions. pHh levels, base excess, bicarbonate, sodium, strong ion differences and osmolarity were significantly greater and potassium and chloride were significantly lower in the second group than in the first group after the infusion of solutions. Conclusion: 1.3% sodium bicarbonate in half-normal saline solution can lead to a proper correction of hemodynamic instability. By maintaining hemodynamic status, osmolarity and electrolytes as well as better balance of acid–base, 1.3% sodium bicarbonate solution in half-normal saline solution can be more effective than Ringer lactate solution during intraoperative bleeding.
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Affiliation(s)
- Sayed Jalal Hashemi
- Department of Anesthesiology, Anesthesiology and Critical Care Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sayed Morteza Heidari
- Department of Anesthesiology, Anesthesiology and Critical Care Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ahmad Yaraghi
- Department of Anesthesiology, Anesthesiology and Critical Care Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Reza Seirafi
- Department of Anesthesiology, Anesthesiology and Critical Care Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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Fully Balanced Fluids do not Improve Microvascular Oxygenation, Acidosis and Renal Function in a Rat Model of Endotoxemia. Shock 2016; 46:83-91. [DOI: 10.1097/shk.0000000000000573] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Gucyetmez B, Atalan HK. Non-lactate strong ion difference: a clearer picture. J Anesth 2016; 30:391-6. [PMID: 26961820 DOI: 10.1007/s00540-016-2158-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 02/21/2016] [Indexed: 11/26/2022]
Abstract
PURPOSE The recommended method for elucidating the effects of strong ions other than lactate on acid-base balance is to calculate the non-lactate strong ion difference (SIDnl). A relationship between HCO3 (-) and SIDnl in hyperchloremic patients has already been demonstrated; in the present study, the relationships between SIDnl, the apparent strong ion difference (SIDa), and mortality at intensive care unit (ICU) admission were investigated. METHODS In our two-center study, 2691 patients admitted to the ICU were retrospectively evaluated, including 1069 critically ill patients. These patients were divided into three subgroups according to their SIDnl levels at admission to the ICU: low (<38 mmol L(-1)), normal (38-40 mmol L(-1)), and high (>40 mmol L(-1)). Patient age, gender, diagnosis, blood gas values, length of ICU stay, and mortality were recorded. RESULTS The low-SIDnl group included 768 patients (71.8 %), the normal-SIDnl group consisted of 127 patients (11.9 %), and the high-SIDnl group contained 174 patients (16.3 %). There was no significant difference in lactate levels among the SIDnl groups (p = 0.635). In a multivariate logistic regression model, likelihood of mortality was increased 1.24-fold (1.20-1.28), 2.56-fold (1.61-4.08) and 2.55-fold (1.003-6.47) by APACHE II, lactate level ≥2mmol L(-) and low SIDnl (p < 0.001, p < 0.001, and p = 0.049, respectively). CONCLUSIONS SIDnl can be used to determine the effects of strong ions other than lactate on SIDa values and acid-base balance. Furthermore, a low SIDnl at ICU admission can be a prognostic indicator of mortality.
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Affiliation(s)
- Bulent Gucyetmez
- Department of Anesthesiology, Acıbadem University School of Medicine, Kerem Aydınlar Kampüsü Kayışdağı Cad. No:32, Ataşehir, 34752, Istanbul, Turkey.
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Owyang CG, Shah KH. Are Balanced Crystalloids the Preferred Resuscitation Fluid for Severe Sepsis and Septic Shock? Ann Emerg Med 2015; 66:523-5. [DOI: 10.1016/j.annemergmed.2015.02.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Indexed: 10/23/2022]
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Corrêa TD, Rocha LL, Pessoa CMS, Silva E, de Assuncao MSC. Fluid therapy for septic shock resuscitation: which fluid should be used? ACTA ACUST UNITED AC 2015; 13:462-8. [PMID: 26313437 PMCID: PMC4943797 DOI: 10.1590/s1679-45082015rw3273] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 03/14/2015] [Indexed: 02/06/2023]
Abstract
Early resuscitation of septic shock patients reduces the sepsis-related morbidity and mortality. The main goals of septic shock resuscitation include volemic expansion, maintenance of adequate tissue perfusion and oxygen delivery, guided by central venous pressure, mean arterial pressure, mixed or central venous oxygen saturation and arterial lactate levels. An aggressive fluid resuscitation, possibly in association with vasopressors, inotropes and red blood cell concentrate transfusion may be necessary to achieve those hemodynamic goals. Nonetheless, even though fluid administration is one of the most common interventions offered to critically ill patients, the most appropriate type of fluid to be used remains controversial. According to recently published clinical trials, crystalloid solutions seem to be the most appropriate type of fluids for initial resuscitation of septic shock patients. Balanced crystalloids have theoretical advantages over the classic solutions, but there is not enough evidence to indicate it as first-line treatment. Additionally, when large amounts of fluids are necessary to restore the hemodynamic stability, albumin solutions may be a safe and effective alternative. Hydroxyethyl starches solutions must be avoided in septic patients due to the increased risk of acute renal failure, increased need for renal replacement therapy and increased mortality. Our objective was to present a narrative review of the literature regarding the major types of fluids and their main drawbacks in the initial resuscitation of the septic shock patients.
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Affiliation(s)
| | | | | | - Eliézer Silva
- Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
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Aristizábal-Salazar RE, Calvo-Torres LF, Valencia-Arango LA, Montoya-Cañon M, Barbosa-Gantiva O, Hincapié-Baena V. Equilibrio ácido-base: el mejor enfoque clínico. COLOMBIAN JOURNAL OF ANESTHESIOLOGY 2015. [DOI: 10.1016/j.rca.2015.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Aristizábal-Salazar RE, Calvo-Torres LF, Valencia-Arango LA, Montoya-Cañon M, Barbosa-Gantiva O, Hincapié-Baena V. Acid–base equilibrium: The best clinical approach. COLOMBIAN JOURNAL OF ANESTHESIOLOGY 2015. [DOI: 10.1016/j.rcae.2015.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Acid-base equilibrium: The best clinical approach☆. COLOMBIAN JOURNAL OF ANESTHESIOLOGY 2015. [DOI: 10.1097/01819236-201543030-00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Saikia P, Choudhury D, Bora BB. Role of acidic pH of intravenous fluids in subsequent development of metabolic acidosis- may not be what it seems. Indian J Crit Care Med 2014; 18:484-5. [PMID: 25097372 PMCID: PMC4118525 DOI: 10.4103/0972-5229.136088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Priyam Saikia
- Department of Anaesthesiology and Critical Care, Guwahati Medical College and Hospital, Guwahati, Assam, India
| | - Dipika Choudhury
- Department of Anaesthesiology and Critical Care, Guwahati Medical College and Hospital, Guwahati, Assam, India
| | - Bikash B Bora
- Department of Anaesthesiology and Critical Care, Guwahati Medical College and Hospital, Guwahati, Assam, India
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Ince C, Groeneveld ABJ. The case for 0.9% NaCl: is the undefendable, defensible? Kidney Int 2014; 86:1087-95. [PMID: 25007167 DOI: 10.1038/ki.2014.193] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 01/07/2014] [Accepted: 01/31/2014] [Indexed: 12/12/2022]
Abstract
Although 0.9% NaCl solution is by far the most-used fluid for fluid therapy in resuscitation, it is difficult to find a paper advocating its use over other types of crystalloid solutions. Literature on the deleterious effects of 0.9% NaCl has accumulated over the last decade, but critical appraisal of alternative crystalloid solutions is lacking. As such, the literature seems to suggest that 0.9% NaCl should be avoided at all costs, whereas alternative crystalloid solutions can be used without scrutiny. The basis of this negative evaluation of 0.9% NaCl is almost exclusively its effect on acid-base homeostasis, whereas the potentially deleterious effects present in other types of crystalloids are neglected. We have the challenging task of defending the use of 0.9% NaCl and reviewing its positive attributes, while an accompanying paper will argue against the use of 0.9% NaCl. It is challenging because of the large amount of literature, including our own, showing adverse effects of 0.9% NaCl. We will discuss why 0.9% NaCl solution is the most frequently used resuscitation fluid. Although it has some deleterious effects, all fluids share common features of concern. As such the emphasis on fluid resuscitation should be on volume rather than on composition and should be accompanied by a physiological assessment of the impact of fluids. In this paper, we hope to discuss the context within which fluids, specifically 0.9% NaCl, can be given in a safe and effective manner.
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Affiliation(s)
- Can Ince
- Department of Intensive Care, Erasmus MC University Hospital Rotterdam, Rotterdam, The Netherlands
| | - A B Johan Groeneveld
- Department of Intensive Care, Erasmus MC University Hospital Rotterdam, Rotterdam, The Netherlands
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Blanchard A, Lorthioir A, Zhygalina V, Curis E. Approche de Stewart : ou comment faire du neuf avec du vieux ? MEDECINE INTENSIVE REANIMATION 2014. [DOI: 10.1007/s13546-014-0889-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sahmeddini MA, Janatmakan F, Khosravi MB, Ghaffaripour S, Eghbal MH, Shokrizadeh S. The Effect of Intraoperative Restricted Normal Saline during Orthotopic Liver Transplantation on Amount of Administered Sodium Bicarbonate. IRANIAN JOURNAL OF MEDICAL SCIENCES 2014; 39:247-53. [PMID: 24850981 PMCID: PMC4027003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Revised: 11/30/2013] [Accepted: 01/05/2014] [Indexed: 11/21/2022]
Abstract
BACKGROUND Severe metabolic acidosis occurs during orthotopic liver transplantation (OLT) particularly during the anhepatic phase. Although NaHCO3 is considered as the current standard therapy, there are numerous adverse effects. The aim of this study was to determine whether the restricted use of normal saline during anesthesia could reduce the need for NaHCO3. METHODS In this study we enrolled 75 patients with end-stage liver disease who underwent OLT from February 2010 until September 2010 at the Shiraz Organ Transplantation Center. Fluid management of two different transplant anesthetics were compared. The effect of restricted normal saline fluid was compared with non-restricted normal saline fluid on hemodynamic and acid-base parameters at three times during OLT: after the skin incision (T1), 15 min before reperfusion (T2), and 5 min after reperfusion (T3). RESULTS There were no significant differences in demographic characteristics of the donors and recipients (P>0.05). In the restricted normal saline group there was significantly lower central venous pressure (CVP) than in the non-restricted normal saline group (P=0.002). No significant differences were noted in the other hemodynamic parameters between the two groups (P>0.05). In the non-restricted normal saline group arterial blood pH (P=0.01) and HCO3 (P=0.0001) were significantly less than the restricted normal saline group. The NaHCO3 requirement before reperfusion was significantly more than with the restricted normal saline group (P=0.001). CONCLUSION Restricted normal saline administration during OLT reduced the severity of metabolic acidosis and the need for NaHCO3 during the anhepatic phase. TRIAL REGISTRATION NUMBER IRCT2013110711662N5.
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Affiliation(s)
- Mohammad Ali Sahmeddini
- Shiraz Anesthesiology and Critical Care Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;
| | - Farahzad Janatmakan
- Department of Anesthesiology and Critical Care, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Bagher Khosravi
- Shiraz Anesthesiology and Critical Care Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;
| | - Sina Ghaffaripour
- Shiraz Anesthesiology and Critical Care Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;
| | - Mohammad Hossein Eghbal
- Shiraz Anesthesiology and Critical Care Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;
| | - Sakine Shokrizadeh
- Shiraz Anesthesiology and Critical Care Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;
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Affiliation(s)
- Daniel Martin
- Senior Lecturer and Honorary Consultant, Critical Care and Anaesthesia University College London Division of Surgery and Interventional Science Royal Free Hospital London
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Abstract
PURPOSE OF REVIEW We discuss the formulation of a prescription for intravenous (i.v.) fluid therapy (a 'volume prescription') for critically ill patients: pros/cons of different fluid types; accurate dosing; and qualitative and quantitative toxicities. Updated physiologic concepts are invoked and results of recent major clinical trials on i.v. fluid therapy in the acutely ill are interpreted. RECENT FINDINGS Context is vital and any fluid can be harmful if dosed incorrectly. When contrasting 'crystalloid versus colloid', differences in efficacy are modest, but differences in safety are significant. Differences in chloride load and strong ion difference appear to be clinically important. Quantitative toxicity is mitigated when dosing is based on dynamic parameters that predict volume responsiveness. Qualitative toxicity for colloids (even with newer hydroxyethyl starch 130/0.4 solutions) and isotonic saline remain a concern. SUMMARY Similar to any drug used in acutely ill patients, clinicians ordering a volume prescription must recognize that context is crucial. Physiologically balanced crystalloids may be the 'default' fluid for acutely ill patients, and the role for colloids is unclear. Optimal dosing involves assessment of volume responsiveness.
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Mitsuoka M, Inoue N, Mori S, Matsumoto T, Meguro T. Renal dysfunction on admission as a predictor for in-hospital mortality of patients with stanford type B acute aortic dissection. Ann Vasc Dis 2013; 6:624-30. [PMID: 24130619 DOI: 10.3400/avd.oa.13-00034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 06/09/2013] [Indexed: 11/13/2022] Open
Abstract
Stanford type A and open false lumen are accepted predictors for in-hospital mortality in patients with acute aortic dissection (AAD). However, the association of renal dysfunction on admission with in-hospital mortality is not well known. The aim of this study was to investigate the prognostic value of renal dysfunction in patients with AAD. A total of 250 patients with type B AAD admitted to our institution between January 2003 and August 2011 were enrolled in this study. In multivariate logistic regression analysis, the significant predictors of in-hospital mortality were age (odds ratio [OR] 1.575, 95% confidence interval [CI] 1.078-2.864, p = 0.024), maximum aortic diameter measured by an initial computed tomography (CT) (OR 1.740, 95% CI 1.029-2.940, p = 0.039), decreased enhancement of kidney (OR 7.716, 95% CI 2.335-25.501, p = 0.001) and estimated glomerular filtration rate (eGFR) <60 ml/min/1.73m(2) on admission (OR 2.782, 95% CI 1.062-7.283, p = 0.037). In conclusions the results identified a renal dysfunction on admission as the independent predictor of in-hospital mortality in type B AAD. Further investigations are needed to evaluate therapies and strategies for decreasing the deterioration of renal function to improve in-hospital mortality in patients with AAD.
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Affiliation(s)
- Mikio Mitsuoka
- Cardiovascular Center, Sendai Kousei Hospital, Sendai, Miyagi, Japan
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West E, Pettitt R, Jones RS, Cripps PJ, Mosing M. Acid-base and electrolyte balance following administration of three crystalloid solutions in dogs undergoing elective orthopaedic surgery. Vet Anaesth Analg 2013; 40:482-93. [PMID: 23438064 DOI: 10.1111/vaa.12021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2012] [Accepted: 10/27/2012] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To compare acid-base balance and incidence of hyperchloraemic metabolic acidosis following administration of three crystalloid solutions to dogs undergoing anaesthesia for orthopaedic surgery. STUDY DESIGN Prospective, randomised, clinical study. ANIMALS Sixty dogs. METHODS During a non-standardised anaesthetic, 0.9% saline (S), Hartmann's solution (H) or a polyionic glucose-free maintenance solution (M) was administered IV at 10 mL kg(-1) hour(-1) . Venous blood pH, PCO2 , PCV, total protein, urea, sodium, potassium and chloride concentrations were measured at induction of anaesthesia (T0) and after 2 hours of fluid therapy (T2). Base excess (BE), bicarbonate, corrected chloride concentration (corrCl), osmolality, change in plasma volume (PV) and strong ion gap (SIG) were calculated. Changes in variables within groups (1-sample Student's t-test/Wilcoxon signed rank test) and between groups (1-way anova/Kruskal-Wallis) were assessed. Data are presented as median (interquartile range). Significance was set at p < 0.05. RESULTS No significant differences existed between groups for pH, PCO2 , PCV, total protein, urea, potassium, corrCl, PV and SIG. Potassium significantly increased in all groups. Significant differences existed between groups S and M for BE, sodium, chloride, bicarbonate and osmolality, and between groups H and M for sodium and osmolality. Chloride concentration significantly changed from 116 (114-117) to 117 (116-119) mmol L(-1) in group S, 116 (115-118) to 115 (113-117) mmol L(-1) in group H and 116 (115-118) to 114 (113-118) mmol L(-1) in group M. In groups H and M, sodium and osmolality decreased, and BE and bicarbonate concentration increased significantly. Plasma volume increased by 28 (14-44)%, 25 (5-40)% and 24 (13-33)% in groups S, H and M, respectively. CONCLUSION AND CLINICAL RELEVANCE Hyperchloraemic metabolic acidosis did not develop after intraoperative 0.9% saline, Hartmann's solution or maintenance solution at 10 mL kg(-1) hour(-1) for 2 hours in dogs undergoing elective orthopaedic surgery. Bicarbonate and BE increased after Hartmann's and maintenance solutions. Increases in potassium concentration were unexplained.
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Affiliation(s)
- Eleanor West
- School of Veterinary Science, University of Liverpool, Liverpool, UK.
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Abstract
Commercial 0.9% saline solution for infusion has a pH around 5.5. There are many reasons for this acidity, some of them still obscure. It is also true that infusion of normal saline can lead to metabolic acidaemia, yet the link between the acidity of saline solution and the acidaemia it can engender is not straightforward. This commentary draws together the known and putative sources of acidity in saline solutions: it turns out that the acidity of saline solution is essentially unrelated to the acidaemia complicating saline infusion.
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Affiliation(s)
- Benjamin A J Reddi
- Intensive Care Unit, Royal Adelaide Hospital; Clinical Senior Lecturer, Discipline of Acute Care Medicine, University of Adelaide, Adelaide, Australia.
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Tani M, Morimatsu H, Takatsu F, Morita K. The incidence and prognostic value of hypochloremia in critically ill patients. ScientificWorldJournal 2012; 2012:474185. [PMID: 22701359 PMCID: PMC3373177 DOI: 10.1100/2012/474185] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 03/25/2012] [Indexed: 11/17/2022] Open
Abstract
Little is known on the clinical effects of chloride on critically ill patients. We conducted this retrospective, observational study in 488 critically ill patients to investigate the incidence of chloride abnormalities, effects of hypochloremia in acid-base disorders, and association between chloride and clinical outcome. The study involved retrieval of arterial blood gas analyses, biochemical and demographical data from electrical records as well as quantitative acid-base analyses. For statistical analysis, the patients were stratified into three groups according to their chloride level (normal range: 98–106 mEq/L). The distribution of chloride levels was hyperchloremia 16.6%, normochloremia 74.6%, and hypochloremia 8.8%. The hypochloremic group was significantly alkalemic (P < 0.0001) and has significantly higher apparent strong ion difference (SIDa) (P < 0.0001) compared to the two other groups. The hypochloremic group had significantly longer stays in the ICU and hospital (P < 0.0001) with higher mortality (P < 0.0001). However, multiple regression analysis showed that chloride was not an independent factor of poorer outcome. In conclusion, the acid-base characteristics of the hypochloremic patients were alkalemia coexisting with higher SIDa. And although it was not an independent prognostic factor, hypochloremia was related to poorer outcome in critically ill settings.
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Affiliation(s)
- Makiko Tani
- Department of Anesthesiology and Resuscitology, Okayama University Hospital, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
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Acute Effects of Balanced Versus Unbalanced Colloid Resuscitation on Renal Macrocirculatory and Microcirculatory Perfusion During Endotoxemic Shock. Shock 2012; 37:205-9. [PMID: 22089195 DOI: 10.1097/shk.0b013e31823ca89c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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The European Consensus Statement on intraoperative fluid therapy in children: a step in the right direction. Eur J Anaesthesiol 2011; 28:618-9. [PMID: 21822076 DOI: 10.1097/eja.0b013e328345c96d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Perioperative metabolic alkalemia is more frequent than metabolic acidemia in major elective abdominal surgery. J Clin Monit Comput 2011; 25:223-30. [DOI: 10.1007/s10877-011-9299-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Accepted: 08/19/2011] [Indexed: 11/25/2022]
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Wolf MB, DeLand EC. A mathematical model of blood-interstitial acid-base balance: application to dilution acidosis and acid-base status. J Appl Physiol (1985) 2011; 110:988-1002. [DOI: 10.1152/japplphysiol.00514.2010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We developed mathematical models that predict equilibrium distribution of water and electrolytes (proteins and simple ions), metabolites, and other species between plasma and erythrocyte fluids (blood) and interstitial fluid. The models use physicochemical principles of electroneutrality in a fluid compartment and osmotic equilibrium between compartments and transmembrane Donnan relationships for mobile species. Across the erythrocyte membrane, the significant mobile species Cl−is assumed to reach electrochemical equilibrium, whereas Na+and K+distributions are away from equilibrium because of the Na+/K+pump, but movement from this steady state is restricted because of their effective short-term impermeability. Across the capillary membrane separating plasma and interstitial fluid, Na+, K+, Ca2+, Mg2+, Cl−, and H+are mobile and establish Donnan equilibrium distribution ratios. In each compartment, attainment of equilibrium by carbonates, phosphates, proteins, and metabolites is determined by their reactions with H+. These relationships produce the recognized exchange of Cl−and bicarbonate across the erythrocyte membrane. The blood submodel was validated by its close predictions of in vitro experimental data, blood pH, pH-dependent ratio of H+, Cl−, and HCO3−concentrations in erythrocytes to that in plasma, and blood hematocrit. The blood-interstitial model was validated against available in vivo laboratory data from humans with respiratory acid-base disorders. Model predictions were used to gain understanding of the important acid-base disorder caused by addition of saline solutions. Blood model results were used as a basis for estimating errors in base excess predictions in blood by the traditional approach of Siggaard-Andersen (acid-base status) and more recent approaches by others using measured blood pH and Pco2values. Blood-interstitial model predictions were also used as a basis for assessing prediction errors of extracellular acid-base status values, such as by the standard base excess approach. Hence, these new models can give considerable insight into the physicochemical mechanisms producing acid-base disorders and aid in their diagnoses.
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Affiliation(s)
- Matthew B. Wolf
- Department of Pharmacology, Physiology, and Neuroscience, University of South Carolina, Columbia, South Carolina; and
| | - Edward C. DeLand
- Department of Surgery, University of California at Los Angeles, Westwood, California
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Noritomi DT, Pereira AJ, Bugano DDG, Rehder PS, Silva E. Impact of Plasma-Lyte pH 7.4 on acid-base status and hemodynamics in a model of controlled hemorrhagic shock. Clinics (Sao Paulo) 2011; 66:1969-74. [PMID: 22086530 PMCID: PMC3203972 DOI: 10.1590/s1807-59322011001100019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Accepted: 07/13/2011] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVE Intravenous infusion of crystalloid solutions is a cornerstone of the treatment of hemorrhagic shock. However, crystalloid solutions can have variable metabolic acid-base effects, perpetuating or even aggravating shock-induced metabolic acidosis. The aim of this study was to compare, in a controlled volume-driven porcine model of hemorrhagic shock, the effects of three different crystalloid solutions on the hemodynamics and acid-base balance. METHODS Controlled hemorrhagic shock (40% of the total blood volume was removed) was induced in 18 animals, which were then treated with normal saline (0.9% NaCl), Lactated Ringer's Solution or Plasma-Lyte pH 7.4, in a blinded fashion (n = 6 for each group). Using a predefined protocol, the animals received three times the volume of blood removed. RESULTS The three different crystalloid infusions were equally capable of reversing the hemorrhage-induced low cardiac output and anuria. The Lactated Ringer's Solution and Plasma-Lyte pH 7.4 infusions resulted in an increased standard base excess and a decreased serum chloride level, whereas treatment with normal saline resulted in a decreased standard base excess and an increased serum chloride level. The Plasma-Lyte pH 7.4 infusions did not change the level of the unmeasured anions. CONCLUSION Although the three tested crystalloid solutions were equally able to attenuate the hemodynamic and tissue perfusion disturbances, only the normal saline induced hyperchloremia and metabolic acidosis.
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The acid-base effects of free water removal from and addition to oxygenated and deoxygenated whole blood: an in vitro model of contraction alkalosis and dilutional acidosis. Transl Res 2011; 157:29-37. [PMID: 21146148 DOI: 10.1016/j.trsl.2010.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 09/20/2010] [Accepted: 09/22/2010] [Indexed: 11/22/2022]
Abstract
This study was conducted to describe the acid-base effects of hydration and dehydration of oxygenated and deoxygenated whole blood. Whole blood samples from goats were equilibrated in a tonometer to a partial pressure of carbon dioxide of 40 mm Hg and oxygen (PO₂) of 100 mm Hg or 30 mm Hg. Contraction alkalosis was achieved by evaporating blood samples to 80% of the original volume. Dilutional acidosis was achieved by increasing the blood sample volume by 20% by addition of sterile water. Acid-base, electrolyte, hemoglobin, lactate, albumin, and phosphorus concentrations were measured at baseline and after dehydration or hydration. A 20% dehydration of whole blood caused a 22% increase in sodium concentration and a significant increase in base excess of +3 mEq/L (P < 0.01); bicarbonate concentration increased only 7% to 9%. A concurrent increase was found in phosphorus, albumin, hemoglobin, and lactate concentrations. A 20% dilution of whole blood caused a 21% decrease in sodium concentration and a significant decrease in base excess of -5 mEq/L (P < 0.01) with an 11% to 15% decrease in bicarbonate concentration. A concurrent decrease was found in phosphorus, albumin, and hemoglobin concentrations. No significant difference was observed between the acid-base effects on oxygenated versus deoxygenated blood in any experiment. Dilutional acidosis and contraction alkalosis of whole blood are complex acid-base disorders resulting from direct changes in bicarbonate concentration in combination with changes in the concentration of weak plasma acids and buffering reactions. Therefore, bicarbonate concentration does not change to the same degree as the magnitude of contraction or dilution.
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Gheorghe C, Dadu R, Blot C, Barrantes F, Vazquez R, Berianu F, Feng Y, Feintzig I, Amoateng-Adjepong Y, Manthous CA. Hyperchloremic Metabolic Acidosis Following Resuscitation of Shock. Chest 2010; 138:1521-2. [DOI: 10.1378/chest.10-1458] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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