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The Influence of Chloride for the Interpretation of Plasma Bicarbonate During the Treatment of Diabetic Ketoacidosis. Pediatr Emerg Care 2020; 36:e143-e145. [PMID: 28742636 DOI: 10.1097/pec.0000000000001245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Hyperchloremic metabolic acidosis can occur in diabetic ketoacidosis (DKA) and may affect the acid-base interpretation during treatment. OBJECTIVES This study aims to describe the prevalence of hyperchloremia during the treatment of DKA and its effect on the interpretation of bicarbonate value. METHODS A cross-sectional study, including all cases of DKA in patients aged 1 to 18 years old admitted from 2010 to 2015, was performed. Laboratory tests were performed on admission (baseline), 2 and 6 hours after admission, and when resolution of DKA was achieved. Adjusted bicarbonate value was calculated using regression equations. RESULTS Seventy-nine DKA episodes were included. The average age was 13.3 ± 3.8 years. Baseline levels were as follows: plasma glucose, 479 ± 133 mg/dL; pH 7.1 ± 0.083; bicarbonate, 9.65 ± 2.9; and anion gap, 23.9 ± 7.5. The time to achieve resolution of DKA was 12.2 ± 4.4 hours, and the decrease in capillary glucose was 25.5 (19.7-38.2) mg/dL per hour. After 6 hours of treatment, the proportion of patients presenting hyperchloremia increased from 23% to 77%. By using adjusted bicarbonate, the percentage of patients achieving resolution of DKA after 6 hours of treatment would have been 35.4% (confidence interval 95%, 28-49), in comparison with 24.1% (confidence interval 95%, 18-37) using observed bicarbonate (P = 0.004). CONCLUSIONS The hyperchloremia developed during the treatment of DKA could modify the value of measured plasma bicarbonate concentration and unnecessarily prolong the initial phase of treatment.
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Lawton TO, Quinn A, Fletcher SJ. Perioperative metabolic acidosis: The Bradford Anaesthetic Department Acidosis Study. J Intensive Care Soc 2018; 20:11-17. [PMID: 30792757 DOI: 10.1177/1751143718772792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
Metabolic acidosis is considered deleterious but is common in post-surgical patients admitted to intensive care unit. We evaluated the prevalence and time course of metabolic acidosis in elective major surgery, and generated hypotheses about causes, by hourly arterial blood sampling in 92 patients. Metabolic acidosis began before incision and most had occurred by the next hour. Seventy-eight per cent of patients had a significant metabolic acidosis post-operatively. Two overlapping phases were observed. The early phase started before incision, characterised by a rising chloride and falling anion gap, unrelated to saline use. The late phase was partly associated with lactate, related to surgery type, and early fluids appeared protective. There was a trend towards longer intensive care unit (+1.3 days) and hospital (+3.2 days) stay with metabolic acidosis. This is the first large study of the evolution of this common finding, demonstrating a pre-incision component. The early phase appears unavoidable or unpredictable, but the late phase might be modified by early fluid administration. It remains unclear whether acidosis of this type should be avoided.
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Affiliation(s)
- T O Lawton
- Bradford Teaching Hospitals NHS Trust, Bradford, UK
| | - A Quinn
- Bradford Teaching Hospitals NHS Trust, Bradford, UK
| | - S J Fletcher
- Mid Yorkshire Hospitals NHS Trust, Wakefield, UK
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3
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Ma X, Yao H, Yang Y, Jin L, Wang Y, Wu L, Yang S, Cheng K. miR-195 suppresses abdominal aortic aneurysm through the TNF-α/NF-κB and VEGF/PI3K/Akt pathway. Int J Mol Med 2018; 41:2350-2358. [PMID: 29393364 DOI: 10.3892/ijmm.2018.3426] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 01/18/2018] [Indexed: 02/01/2023] Open
Abstract
In the present study, the function of microRNA (miR)‑195 on abdominal aortic aneurysm (AAA) and its possible mechanism were investigated. Reverse transcription‑quantitative polymerase chain reaction analysis was used to detect the expression of miR‑195 in patients with AAA. The expression levels of miR‑195 in patients with AAA were effectively increased. The present study also used miR‑195 mimics to increase the expression of miR‑195, and ELISA kits and western blot analysis were used to analyze the levels of interleukin (IL)‑1β and IL‑6, and the protein expression levels of matrix metalloproteinase (MMP)‑2, MMP‑9, tumor necrosis factor (TNF)‑α, nuclear factor (NF)‑κB, vascular endothelial growth factor (VEGF), phosphoinositide 3‑kinase (PI3K) and phosphorylated (p‑)Akt. The overexpression of miR‑195 promoted the levels of IL‑1β and IL‑6, induced the protein expression of MMP‑2 and MMP‑9, upregulated the protein expression of TNF‑α and NF‑κB, and suppressed the protein expression levels of VEGF, PI3K and p‑Akt in angiotensin II‑vascular smooth muscle cells. In addition, TNF‑α promoted the pre‑inflammatory effect of miR‑195 on the protein expression levels of TNF‑α and NF‑κB, levels of IL‑1β and IL‑6, and protein expression levels of MMP‑2 and MMP‑9 in the angiotensin II‑vascular smooth muscle cells. Suppression of PI3K promoted the pre‑inflammatory effect of miR‑195 on the protein expression of PI3K, p‑Akt and VEGF, the levels of IL‑1β and IL‑6, and the protein expression of MMP‑2 and MMP‑9 in angiotensin II‑vascular smooth muscle cells. Combined, these results suggested that miR‑195 suppressed AAA inflammation through the TNF‑α/NF‑κB and VEGF/PI3K/Akt pathways.
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Affiliation(s)
- Xiaohui Ma
- Department of Vascular Surgery, General Hospital of People's Liberation Army, Beijing 100853, P.R. China
| | - Hairong Yao
- Department of Cardiology, Xi'an No. 3 Hospital, Xi'an, Shaanxi 710018, P.R. China
| | - Yuhong Yang
- Department of Cardiology, People's Hospital of Yuncheng, Yuncheng, Shanxi 044000, P.R. China
| | - Long Jin
- Department of Cardiology, Xi'an Ninth Hospital, Xi'an, Shaanxi 710004, P.R. China
| | - Yu Wang
- Department of Nursing, Xi'an No. 3 Hospital, Xi'an, Shaanxi 710018, P.R. China
| | - Lina Wu
- Department of Nursing, Xi'an No. 3 Hospital, Xi'an, Shaanxi 710018, P.R. China
| | - Shengli Yang
- Department of Cardiology, Xi Jing Hospital, Xi'an, Shaanxi 710032, P.R. China
| | - Kang Cheng
- Department of Cardiology, Xi'an No. 3 Hospital, Xi'an, Shaanxi 710018, P.R. China
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Kellum JA, Cerda J, Kaplan LJ, Nadim MK, Palevsky PM. Fluids for Prevention and Management of Acute Kidney Injury. Int J Artif Organs 2018; 31:96-110. [DOI: 10.1177/039139880803100204] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Fluids are the only known method of attenuating renal injury. Furthermore, whether for hydration, resuscitation or renal replacement therapy, fluid prescriptions must be tailored to the fluid and electrolyte, cardiovascular status and residual renal function of the patient. Different fluids have significantly different effects both on volume expansion as well as on the electrolyte and acid-base balance; while controversial, different fluids may even influence renal function differently. This systematic review focuses on fluids for prevention and management of acute kidney injury. We have reviewed the available evidence and have made recommendations for clinical practice and future studies.
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Affiliation(s)
- J. A. Kellum
- Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania - USA
| | - J. Cerda
- Division of Nephrology, Albany Medical College and Capital District Renal Physicians, Albany, New York - USA
| | - L. J. Kaplan
- Department of Surgery, Section of Trauma, Surgical Critical Care and Surgical Emergencies, Yale University School of Medicine, New Haven, Connecticut - USA
| | - M. K. Nadim
- Division of Nephrology, Department of Medicine, University of Southern California Keck School of Medicine, Los Angeles, California - USA
| | - P. M. Palevsky
- VA Pittsburgh Healthcare System, University Drive Division, Pittsburgh, Pennsylvania - USA
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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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Shrum B, Church B, McArthur E, Burns KEA, Znajda T, McAlister V. Hypertonic salt solution for peri-operative fluid management. Cochrane Database Syst Rev 2016; 2016:CD005576. [PMID: 27271480 PMCID: PMC8627702 DOI: 10.1002/14651858.cd005576.pub3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Fluid excess may place people undergoing surgery at risk for various complications. Hypertonic salt solution (HS) maintains intravascular volume with less intravenous fluid than isotonic salt (IS) solutions, but may increase serum sodium. This review was published in 2010 and updated in 2016. OBJECTIVES To determine the benefits and harms of HS versus IS solutions administered for fluid resuscitation to people undergoing surgery. SEARCH METHODS In this updated review we have searched the Cochrane Central Register of Controlled Trials (CENTRAL; Issue 4, 2016); MEDLINE (January 1966 to April 2016); EMBASE (January 1980 to April 2016); LILACS (January 1982 to April 2016) and CINAHL (January 1982 to April 2016) without language restrictions. We conducted the original search on April 30th, 2007, and reran it on April 8th, 2016. SELECTION CRITERIA We have included randomized clinical trials (RCTs) comparing HS to IS in people undergoing surgery, irrespective of blinding, language, and publication status. DATA COLLECTION AND ANALYSIS Two independent review authors read studies that met our selection criteria. We collected study information and data using a data collection sheet with predefined parameters. We have assessed the impact of HS administration on mortality, organ failure, fluid balance, serum sodium, serum osmolarity, diuresis and physiologic measures of cardiovascular function. We have pooled the data using the mean difference (MD) for continuous outcomes. We evaluated heterogeneity between studies by I² percentage. We consider studies with an I² of 0% to 30% to have no or little heterogeneity, 30% to 60% as having moderate heterogeneity, and more than 60% as having high heterogeneity. In studies with low heterogeneity we have used a fixed-effect model, and a random-effects model for studies with moderate to high heterogeneity. MAIN RESULTS We have included 18 studies with 1087 participants of whom 545 received HS compared to 542 who received IS. All participants were over 18 years of age and all trials excluded high-risk patients (ASA IV). All trials assessed haematological parameters peri-operatively and up to three days post-operatively.There were three (< 1%) deaths reported in the IS group and four (< 1%) in the HS group, as assessed at 90 days in one study. There were no reports of serious adverse events. Most participants were in a positive fluid balance postoperatively (4.4 L IS and 2.5 L HS), with the excess significantly less in HS participants (MD -1.92 L, 95% confidence interval (CI) -2.61 to -1.22 L; P < 0.00001). IS participants received a mean volume of 2.4 L and HS participants received 1.49 L, significantly less fluid than IS-treated participants (MD -0.91 L, 95% CI -1.24 to -0.59 L; P < 0.00001). The maximum average serum sodium ranged between 138.5 and 159 in HS groups compared to between 136 and 143 meq/L in the IS groups. The maximum serum sodium was significantly higher in HS participants (MD 7.73, 95% CI 5.84 to 9.62; P < 0.00001), although the level remained within normal limits (136 to 146 meq/L).A high degree of heterogeneity appeared to be related to considerable differences in the dose of HS between studies. The quality of the evidence for the outcomes reported ranged from high to very low. The risk of bias for many of the studies could not be determined for performance and detection bias, criteria that we assess as likely to impact the study outcomes. AUTHORS' CONCLUSIONS HS reduces the volume of intravenous fluid required to maintain people undergoing surgery but transiently increases serum sodium. It is not known if HS affects survival and morbidity, but this should be examined in randomized controlled trials that are designed and powered to test these outcomes.
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Affiliation(s)
- Brad Shrum
- University Hospital London Health Sciences CentreGeneral Surgery Experimental LaboratoryDepartment of Surgery339 Windermere RoadLondonONCanadaN6A 5A5
| | - Brian Church
- Department of Anesthesia, University of Western Ontario1 Canadian Field Hospital, Canadian Forces Medical ServiceD2‐315 Victoria HospitalLondonONCanadaN6A 5A5
| | - Eric McArthur
- Victoria HospitalELL‐218800 Commissioners Rd ELondonONCanada
| | - Karen EA Burns
- Keenan Research Centre/Li Ka Shing Knowledge Institute, University of TorontoInterdepartmental Division of Critical Care30 Bond Street, Rm 4‐045 Queen WingTorontoONCanadaM5B 1WB
| | - Tammy Znajda
- Lakeshore General HospitalDepartments of General Surgery and Intensive Care Medicine160 Stillview AvePointe‐ClaireQCCanadaH9R 2Y2
| | - Vivian McAlister
- University of Western OntarioDepartment of SurgeryC4‐212, University HospitalLondonONCanadaN6A 5A5
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Malik ZA, Mir SA, Naqash IA, Sofi KP, Wani AA. A prospective, randomized, double blind study to compare the effects of equiosmolar solutions of 3% hypertonic saline and 20% mannitol on reduction of brain-bulk during elective craniotomy for supratentorial brain tumor resection. Anesth Essays Res 2015; 8:388-92. [PMID: 25886341 PMCID: PMC4258974 DOI: 10.4103/0259-1162.143155] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Aims: The aim of the study was to compare the effect of mannitol (M) and hypertonic saline (HTS) on brain relaxation and electrolyte balance. Settings and Design: Prospective, randomized, double-blind study. Subjects and Methods: A total of 114 patients with American Society of Anesthesiologists status II and III, scheduled to undergo craniotomy for supratentorial brain tumor resection were enrolled. Patients received 5 ml/kg 20% mannitol (n = 56) or 3% HTS (n = 58) at the start of scalp incision. Hemodynamics, fluid balance and electrolytes, were measured at 0, 15, 30, and 60 min and 6 h after infusion. Intensive Care Unit (ICU) stay between the two groups was also recorded. The surgeon assessed brain relaxation on a four-point scale (1 = Relaxed, 2 = Satisfactory, 3 = Firm, 4 = Bulging). Appropriate statistical tests were used for comparison; P < 0.05 was considered significant. Results: Brain relaxation conditions in the HTS group (relaxed/satisfactory/firm/bulging, n = 28/20/5/3) were better than those observed in the M group (relaxed/satisfactory/firm/bulging, n = 17/21/11/9). The levels of serum sodium were higher in the HTS group (P < 0.001). The average urine output was higher in the M group (5.50 ± 0.75 L) than in the HTS group (4.38 ± 0.72 L) (P < 0.005). There was no significant difference in fluid input, ICU stay, and hospital days between the two groups. Conclusion: We concluded that HTS provided better brain relaxation than mannitol during elective supratentorial brain tumor surgery, without affecting ICU and hospital stay.
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Affiliation(s)
- Zaffer A Malik
- Department of Anaesthesiology and Critical Care, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Shafat A Mir
- Department of Anaesthesiology and Critical Care, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Imtiyaz A Naqash
- Department of Anaesthesiology and Critical Care, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Khalid P Sofi
- Department of Anaesthesiology and Critical Care, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Abrar A Wani
- Department of Neurosurgery, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
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Early continuous hypertonic saline infusion in patients with severe cerebrovascular disease. Crit Care Med 2011; 39:1766-72. [DOI: 10.1097/ccm.0b013e318218a390] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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Hydroxyethyl starch for cardiovascular surgery: a systematic review of randomized controlled trials. Eur J Clin Pharmacol 2011; 67:767-82. [DOI: 10.1007/s00228-011-1008-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Accepted: 01/27/2011] [Indexed: 11/26/2022]
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Hofmann-Kiefer KF, Chappell D, Jacob M, Schülke A, Conzen P, Rehm M. [Hypernatremic alkalosis. Possible counterpart of hyperchloremic acidosis in intensive care patients?]. Anaesthesist 2010; 58:1210-5. [PMID: 19911108 DOI: 10.1007/s00101-009-1640-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND With broad acceptance of Stewart's acid-base model "hyperchloremic acidosis" is regarded as an independent form of metabolic disorder. It is unknown whether hypernatremia plays a corresponding role with respect to the development of alkalosis. METHODS A total of 201 artificially ventilated, critically ill patients were monitored for hypernatremic episodes. Inclusion criterion was a serum sodium concentration above 145 mmol/l. RESULTS In 20 patients a total of 78 periods of elevated plasma sodium levels lasting at least 24 h were observed. In 86% of these cases sodium and chloride concentrations were simultaneously increased. The development of alkalosis correlated with the strong ion difference (r=0.80, p<0.01) but not with the serum sodium concentration (r=-0.031, p=0.78). In cases without accompanying hyperchloremia (13%) metabolic alkalosis regularly occurred and a correlation between serum sodium concentration and base excess could be verified (r=0.66, p=0.03). Alkalosis occurred in 84.8% of cases where the strong on difference exceeded 39 mmol/l. CONCLUSION From the available data hypernatremic alkalosis could not be defined as an independent metabolic disorder. In would seem more appropriate to use the term "strong ion alkalosis" in this context.
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Affiliation(s)
- K F Hofmann-Kiefer
- Klinik für Anaesthesiologie, Intensivmedizin und Schmerztherapie, Ludwig-Maximilians-Universität, Klinikum Innenstadt, 80337 München.
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Abstract
BACKGROUND Fluid excess may place patients undergoing surgery at risk for various complications. Hypertonic saline (HS) maintains intravascular volume with less intravenous fluid than isotonic salt (IS) solutions, but may increase serum sodium. OBJECTIVES To determine the benefits and harms of HS versus IS solutions administered to patients undergoing surgery. SEARCH STRATEGY We searched the Cochrane Central Register of Controlled Trials (CENTRAL), (The Cochrane Library) Issue 1, 2009; MEDLINE (1966 to 2009); EMBASE (1980 to 2009); LILACS (to August 2009) and CINAHL (1982 to 2009) without language restrictions. SELECTION CRITERIA We included randomized clinical trials where HS was compared to IS in patients undergoing surgery, irrespective of blinding, language, and publication status. DATA COLLECTION AND ANALYSIS We assessed the impact of HS administration on mortality, organ failure, fluid balance, serum sodium, serum osmolarity, diuresis and physiologic measures of cardiovascular function. We pooled data using odds ratio or mean difference (MD) for binary and continuous outcomes, respectively, using random-effects models. MAIN RESULTS We included 15 studies with 614 participants. One death in each group and no other serious adverse events were reported. While all patients were in a positive fluid balance postoperatively, the excess was significantly less in HS patients (standardized mean difference (SMD) -1.43L, 95% confidence interval (CI) 0.8 to 2.1 L less; P < 0.00001). Patients treated with HS received significantly less fluid than IS-treated patients (MD -2.4L 95% (CI) 1.5 to 3.2 L less; P < 0.00001) without differences in diuresis between the groups. Maximum intraoperative cardiac index was significantly increased with HS (SMD 0.6 L/min/M2 higher, 95% CI 0.1 to 1.0, P = 0.02) but Intraoperative pulmonary artery wedge pressure remained unchanged. While the maximum serum sodium and the serum sodium at the end of the study were significantly higher in HS patients, the level remained within normal limits (136 to 146 meq/L). AUTHORS' CONCLUSIONS HS reduces the volume of intravenous fluid required to maintain patients undergoing surgery but transiently increases serum sodium. It is not known if HS effects patient survival and morbidity but it should be tested in randomized clinical trials that are designed and powered to test these outcomes.
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Affiliation(s)
- Vivian McAlister
- Canadian Forces Medical Service, University of Western Ontario, C4-212, University Hospital, London, Ontario, Canada, N6A 5A5
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Abstract
BACKGROUND Surgery on the abdominal aorta to treat aneurysms or occlusive disease is a major undertaking which requires intensive physiological support and fluid management. Blood products are often used but the main fluid replacement is with crystalloids or colloids. For years there has been controversy over which fluid is optimal and a number of studies have examined the subject. This is an update of a Cochrane review first published in 2000 and previously updated in 2002. OBJECTIVES To determine the effectiveness of different non-blood replacement fluids used in abdominal aorta procedures with a view to identifying the optimal fluid for use. SEARCH STRATEGY The Cochrane Peripheral Vascular Diseases Group searched their Specialised Register (August 2009) and the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2009, Issue 3) for publications describing randomised controlled trials of non-blood replacement fluids in abdominal aortic surgery. In addition, the reference lists from retrieved trials were screened for further information about trials. SELECTION CRITERIA Randomised controlled trials assessing the effects of at least one specific non-blood fluid used for replacement therapy in operations on, and confined to, the abdominal aorta. DATA COLLECTION AND ANALYSIS Data were extracted and then entered into the Review Manager software where statistical analyses were performed. MAIN RESULTS Thirty-eight trials involving 1589 patients were included. Patients undergoing aortic surgery had various physiological parameters measured before and after their operation (these were cardiac, respiratory, haematological, and biochemical). Patients were randomised to a fluid type. This review demonstrated that no single fluid affects any outcome measure significantly more than another fluid across a range of outcomes. The death rate in these studies was 2.45% (39 patients). AUTHORS' CONCLUSIONS Despite the confirmed beneficial effects of colloids in this review, further studies are still required. There are no studies examining the effects of combination fluid therapy. The primary research outcome was death, for which results were limited; therefore, future studies should pay more attention to short-term outcomes such as minimising the need for allogenic blood transfusion, complications (organ failure), and length of stay in both the intensive care unit and hospital.
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Affiliation(s)
- Patiparn Toomtong
- Faculty of Medicine, Siriraj Hospital, Mahidol UniversityDepartment of Anesthesiology2 Prannok Road, Siriraj, Bangkok‐noiBangkokThailand10700
| | - Sirilak Suksompong
- Faculty of Medicine, Siriraj Hospital, Mahidol UniversityDepartment of Anesthesiology2 Prannok Road, Siriraj, Bangkok‐noiBangkokThailand10700
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13
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Dilutional acidosis or uncovered cellular metabolism? Intensive Care Med 2009; 35:2009-11. [DOI: 10.1007/s00134-009-1700-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Accepted: 09/23/2009] [Indexed: 01/13/2023]
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[Acid-base concepts]. Anaesthesist 2009; 58:307-9; author reply 309. [PMID: 19415365 DOI: 10.1007/s00101-009-1509-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Morgan TJ, Power G, Venkatesh B, Jones MA. Acid-base effects of a bicarbonate-balanced priming fluid during cardiopulmonary bypass: comparison with Plasma-Lyte 148. A randomised single-blinded study. Anaesth Intensive Care 2009; 36:822-9. [PMID: 19115651 DOI: 10.1177/0310057x0803600611] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Fluid-induced metabolic acidosis can be harmful and can complicate cardiopulmonary bypass. In an attempt to prevent this disturbance, we designed a bicarbonate-based crystalloid circuit prime balanced on physico-chemical principles with a strong ion difference of 24 mEq/l and compared its acid-base effects with those of Plasma-Lyte 148, a multiple electrolyte replacement solution containing acetate plus gluconate totalling 50 mEq/l. Twenty patients with normal acid-base status undergoing elective cardiac surgery were randomised 1:1 to a 2 litre prime of either bicarbonate-balanced fluid or Plasma-Lyte 148. With the trial fluid, metabolic acid-base status was normal following bypass initiation (standard base excess 0.1 (1.3) mEq/l, mean, SD), whereas Plasma-Lyte 148 produced a slight metabolic acidosis (standard base excess -2.2 (2.1) mEq/l). Estimated group difference after baseline adjustment was 3.6 mEq/l (95% confidence interval 2.1 to 5.1 mEq/l, P=0.0001). By late bypass, mean standard base excess in both groups was normal (0.8 (2.2) mEq/l vs. -0.8 (1.3) mEq/l, P=0.5). Strong ion gap values were unaltered with the trial fluid, but with Plasma-Lyte 148 increased significantly on bypass initiation (15.2 (2.5) mEq/l vs. 2.5 (1.5) mEq/l, P < 0.0001), remaining elevated in late bypass (8.4 (3.4) mEq/l vs. 5.8 (2.4) mEq/l, P < 0.05). We conclude that a bicarbonate-based crystalloid with a strong ion difference of 24 mEq/l is balanced for cardiopulmonary bypass in patients with normal acid-base status, whereas Plasma-Lyte 148 triggers a surge of unmeasured anions, persisting throughout bypass. These are likely to be gluconate and/or acetate. Whether surges of exogenous anions during bypass can be harmful requires further study.
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Affiliation(s)
- T J Morgan
- Department of Anaesthesia, Princess Alexandra Hospital, Brisbane, Queensland, Australia
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Abstract
The advent of balanced solutions for i.v. fluid resuscitation and replacement is imminent and will affect any specialty involved in fluid management. Part of the background to their introduction has focused on the non-physiological nature of 'normal' saline solution and the developing science about the potential problems of hyperchloraemic acidosis. This review assesses the physiological significance of hyperchloraemic acidosis and of acidosis in general. It aims to differentiate the effects of the causes of acidosis from the physiological consequences of acidosis. It is intended to provide an assessment of the importance of hyperchloraemic acidosis and thereby the likely benefits of balanced solutions.
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Affiliation(s)
- J M Handy
- Chelsea and Westminster NHS Foundation Trust, Imperial College London, 369 Fulham Road, London SW10 9NH, UK.
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Bruegger D, Kemming GI, Jacob M, Meisner FG, Wojtczyk CJ, Packert KB, Keipert PE, Faithfull NS, Habler OP, Becker BF, Rehm M. Causes of metabolic acidosis in canine hemorrhagic shock: role of unmeasured ions. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2008; 11:R130. [PMID: 18081930 PMCID: PMC2246228 DOI: 10.1186/cc6200] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Revised: 11/26/2007] [Accepted: 12/14/2007] [Indexed: 02/07/2023]
Abstract
Introduction Metabolic acidosis during hemorrhagic shock is common and conventionally considered to be due to hyperlactatemia. There is increasing awareness, however, that other nonlactate, unmeasured anions contribute to this type of acidosis. Methods Eleven anesthetized dogs were hemorrhaged to a mean arterial pressure of 45 mm Hg and were kept at this level until a metabolic oxygen debt of 120 mLO2/kg body weight had evolved. Blood pH, partial pressure of carbon dioxide, and concentrations of sodium, potassium, magnesium, calcium, chloride, lactate, albumin, and phosphate were measured at baseline, in shock, and during 3 hours post-therapy. Strong ion difference and the amount of weak plasma acid were calculated. To detect the presence of unmeasured anions, anion gap and strong ion gap were determined. Capillary electrophoresis was used to identify potential contributors to unmeasured anions. Results During induction of shock, pH decreased significantly from 7.41 to 7.19. The transient increase in lactate concentration from 1.5 to 5.5 mEq/L during shock was not sufficient to explain the transient increases in anion gap (+11.0 mEq/L) and strong ion gap (+7.1 mEq/L), suggesting that substantial amounts of unmeasured anions must have been generated. Capillary electrophoresis revealed increases in serum concentration of acetate (2.2 mEq/L), citrate (2.2 mEq/L), α-ketoglutarate (35.3 μEq/L), fumarate (6.2 μEq/L), sulfate (0.1 mEq/L), and urate (55.9 μEq/L) after shock induction. Conclusion Large amounts of unmeasured anions were generated after hemorrhage in this highly standardized model of hemorrhagic shock. Capillary electrophoresis suggested that the hitherto unmeasured anions citrate and acetate, but not sulfate, contributed significantly to the changes in strong ion gap associated with induction of shock.
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Affiliation(s)
- Dirk Bruegger
- Clinic of Anesthesiology, Ludwig-Maximilians-University, Marchioninistrasse 15, 81377 Munich, Germany.
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Abstract
Osmolality is the primary determinant of water movement across the intact blood-brain barrier (BBB), and we can predict that reducing serum osmolality would increase cerebral oedema and intracranial pressure. Brain injury affects the integrity of the BBB to varying degrees. With a complete breakdown of the BBB, there will be no osmotic/oncotic gradient, and water accumulates (brain oedema) consequentially to the pathological process. In regions with very moderate BBB injury, the oncotic gradient may be effective. Finally, osmotherapy is effective in brain areas with normal BBB; hypertonic solutions (mannitol, hypertonic saline) dehydrate normal brain tissue, with a decrease in cerebral volume and intracranial pressure. In patients with brain pathology, volume depletion and/or hypotension greatly increase morbidity and mortality. In addition to management of intravascular volume, fluid therapy must often be modified for water and electrolyte (mainly sodium) disturbances. These are common in patients with neurological disease and need to be adequately treated.
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Jacob M, Chappell D, Conzen P, Wilkes MM, Becker BF, Rehm M. Small-volume resuscitation with hyperoncotic albumin: a systematic review of randomized clinical trials. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2008; 12:R34. [PMID: 18318896 PMCID: PMC2447554 DOI: 10.1186/cc6812] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Revised: 02/16/2008] [Accepted: 03/04/2008] [Indexed: 01/13/2023]
Abstract
Background Small-volume resuscitation can rapidly correct hypovolemia. Hyperoncotic albumin solutions, long in clinical use, are suitable for small-volume resuscitation; however, their clinical benefits remain uncertain. Methods Randomized clinical trials comparing hyperoncotic albumin with a control regimen for volume expansion were sought by multiple methods, including computer searches of bibliographic databases, perusal of reference lists, and manual searching. Major findings were qualitatively summarized. In addition, a quantitative meta-analysis was performed on available survival data. Results In all, 25 randomized clinical trials with a total of 1,485 patients were included. In surgery, hyperoncotic albumin preserved renal function and reduced intestinal edema compared with control fluids. In trauma and sepsis, cardiac index and oxygenation were higher after administration of hydroxyethyl starch than hyperoncotic albumin. Improved treatment response and renal function, shorter hospital stay and lower costs of care were reported in patients with liver disease receiving hyperoncotic albumin. Edema and morbidity were decreased in high-risk neonates after hyperoncotic albumin administration. Disability was reduced by therapy with hyperoncotic albumin in brain injury. There was no evidence of deleterious effects attributable to hyperoncotic albumin. Survival was unaffected by hyperoncotic albumin (pooled relative risk, 0.95; 95% confidence interval 0.78 to 1.17). Conclusion In some clinical indications, randomized trial evidence has suggested certain benefits of hyperoncotic albumin such as reductions in morbidity, renal impairment and edema. However, further clinical trials are needed, particularly in surgery, trauma and sepsis.
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Affiliation(s)
- Matthias Jacob
- Klinik für Anästhesiologie, Ludwig-Maximilians-Universität, Klinikum Grosshadern, Nussbaumstrasse 20, D-80336 Munich, Germany.
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Rehm M, Chappell D, Hofmann-Kiefer K. [Paradigm change due to the Stewart model of acid-base equilibrium? We must not re-learn but continue learning!]. Wien Klin Wochenschr 2007; 119:387-9. [PMID: 17671818 DOI: 10.1007/s00508-007-0830-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Markus Rehm
- Klinik für Anästhesiologie, Ludwig-Maximilians-Universität München, Marchioninistrasse 15, 81377 Munich, Germany.
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Tseng MY, Al-Rawi PG, Czosnyka M, Hutchinson PJ, Richards H, Pickard JD, Kirkpatrick PJ. Enhancement of cerebral blood flow using systemic hypertonic saline therapy improves outcome in patients with poor-grade spontaneous subarachnoid hemorrhage. J Neurosurg 2007; 107:274-82. [PMID: 17695380 DOI: 10.3171/jns-07/08/0274] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECT Systemic administration of 23.5% hypertonic saline enhances cerebral blood flow (CBF) in patients with poor-grade spontaneous subarachnoid hemorrhage (SAH). Whether the increment of change in CBF correlates with changes in autoregulation of CBF or outcome at discharge remains unknown. METHODS Thirty-five patients with poor-grade spontaneous SAH received 2 ml/kg 23.5% hypertonic saline intravenously, and they underwent bedside transcranial Doppler (TCD) ultrasonography and intracranial pressure (ICP) monitoring. Seventeen of them underwent Xe-enhanced computed tomography (CT) scanning for measuring CBF. Outcome was assessed using the modified Rankin Scale (mRS) at discharge from the hospital. The data were analyzed using repeated-measurement analysis of variance and Dunnett correction. A comparison was made between patients with favorable and unfavorable outcomes using multivariate logistic regression. RESULTS The authors observed a maximum increase in blood pressure by 10.3% (p < 0.05) and cerebral perfusion pressure (CPP) by 21.2% (p < 0.01) at 30 minutes, followed by a maximum decrease in ICP by 93.1% (p < 0.01) at 60 minutes. Changes in ICP and CPP persisted for longer than 180 and 90 minutes, respectively. The results of TCD ultrasonography showed that the baseline autoregulation was impaired on the ipsilateral side of ruptured aneurysm, and increments in flow velocities were higher and lasted longer on the contralateral side (48.75% compared with 31.96% [p = 0.045] and 180 minutes compared with 90 minutes [p < 0.05], respectively). The autoregulation was briefly impaired on the contralateral side during the infusion. A dose-dependent effect of CBF increments on favorable outcome was seen on Xe-CT scans (mRS Score 1-3, odds ratio 1.27 per 1 ml/100 g tissue x min, p = 0.045). CONCLUSIONS Bolus systemic hypertonic saline therapy may be used for reversal of cerebral ischemia to normal perfusion in patients with poor-grade SAH.
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Affiliation(s)
- Ming-Yuan Tseng
- Department of Neurosurgery, Addenbrooke's Hospital, University of Cambridge, United Kingdom
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Molter GP, Silomon M, Bauer C, Ziegeler S, Soltesz S. Effects of hyperoncotic or hypertonic-hyperoncotic solutions on polymorphonuclear neutrophil count, elastase- and superoxide-anion production: a randomized controlled clinical trial in patients undergoing elective coronary artery bypass grafting. Acta Anaesthesiol Scand 2007; 51:914-21. [PMID: 17578462 DOI: 10.1111/j.1399-6576.2007.01341.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Hypertonic-hyperoncotic solutions may be an effective treatment for systemic inflammatory response syndrome (SIRS). With regard to the immunomodulatory effects of these drugs, previous studies demonstrated controversial results. Therefore, the present study investigated the influence of different hyperoncotic and hypertonic-hyperoncotic solutions on polymorphonuclear neutrophil leukocyte (PMNL) count, elastase and superoxide-anion production in patients undergoing elective coronary artery bypass grafting (CABG) with cardiopulmonary bypass. METHODS Fifty patients scheduled for elective CABG with cardiopulmonary bypass were randomly assigned to five groups: (i) NaCl 0.9%, 750 ml/m(2) body surface area (BSA); (ii) hydroxyethylic starch 10%, 250 ml/m(2) BSA and NaCl 0.9%, 400 ml/m(2) BSA; (iii) dextran 10%, 250 ml/m(2) BSA and NaCl 0.9%, 300 ml/m(2) BSA; (iv) hypertonic sodium chloride 7.2%/hyperoncotic hydroxyethylic starch 10%, 150 ml/m(2) BSA; and (v) hypertonic sodium chloride 7.2%/hyperoncotic dextran 10%, 150 ml/m(2) BSA. Blood samples were drawn from arterial, central venous and coronary artery sinus catheters peri-operatively. PMNL count, superoxide-anion production and elastase were recorded. RESULTS PMNL counts and elastase activity increased in all groups after reperfusion. Superoxide-anion production showed only minor changes. Between groups, no significant differences were demonstrated. CONCLUSIONS Infusion of clinically relevant doses of hypertonic-hyperoncotic solution did not affect PMNL count, elastase- or superoxide-anion production during elective CABG with cardiopulmonary bypass.
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Affiliation(s)
- G P Molter
- Department of Anesthesia and Intensive Care, Klinikum Leverkusen, Leverkusen, Germany
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Holte K, Kehlet H. Fluid Therapy and Surgical Outcomes in Elective Surgery: A Need for Reassessment in Fast-Track Surgery. J Am Coll Surg 2006; 202:971-89. [PMID: 16735213 DOI: 10.1016/j.jamcollsurg.2006.01.003] [Citation(s) in RCA: 156] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Revised: 01/06/2006] [Accepted: 01/16/2006] [Indexed: 11/18/2022]
Affiliation(s)
- Kathrine Holte
- Department of Surgical Gastroenterology, Hvidovre University Hospital, Copenhagen, Denmark
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White H, Cook D, Venkatesh B. The Use of Hypertonic Saline for Treating Intracranial Hypertension After Traumatic Brain Injury. Anesth Analg 2006; 102:1836-46. [PMID: 16717334 DOI: 10.1213/01.ane.0000217208.51017.56] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The past decade has witnessed a resurgence of interest in the use of hypertonic saline for low-volume resuscitation after trauma. Preliminary studies suggested that benefits are limited to a subgroup of trauma patients with brain injury, but a recent study of prehospital administration of hypertonic saline to patients with traumatic brain injury failed to confirm a benefit. Animal and human studies have demonstrated that hypertonic saline has clinically desirable physiological effects on cerebral blood flow, intracranial pressure, and inflammatory responses in models of neurotrauma. There are few clinical studies in traumatic brain injury with patient survival as an end point. In this review, we examined the experimental and clinical knowledge of hypertonic saline as an osmotherapeutic agent in neurotrauma.
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Affiliation(s)
- Hayden White
- Department of Anesthesiology, QE II Hospital, Princess Alexandra Hospital, University of Queensland, Brisbane, Australia.
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Bruegger D, Jacob M, Scheingraber S, Conzen P, Becker BF, Finsterer U, Rehm M. Changes in acid-base balance following bolus infusion of 20% albumin solution in humans. Intensive Care Med 2005; 31:1123-7. [PMID: 15999255 DOI: 10.1007/s00134-005-2683-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2005] [Accepted: 05/26/2005] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To evaluate changes in acid-base balance following bolus infusions of a 20% albumin solution. DESIGN AND SETTING Randomized prospective study in a university hospital. PATIENTS AND PARTICIPANTS Two groups of eight patients each undergoing gynecological surgery. INTERVENTIONS Patients were randomly assigned to receive either 0.9% saline or lactated Ringer's solution. At the end of surgery two boluses of 0.5 g/kg body weight of a 20% albumin solution were administered. Arterial blood gases, electrolytes, and total protein were measured. The strong ion difference and the amount of weak plasma acid were calculated. pH and titratable acidity of the 20% albumin solution were determined. MEASUREMENTS AND RESULTS The infusion of a 20% albumin solution resulted in a significant decrease in pH from 7.284 to 7.262 in the saline group and from 7.422 to 7.394 in the Ringer's group. In both groups the 20% albumin solution caused an increase in strong ion difference and an increase in the amount of weak plasma acid. The observed changes in serum bicarbonate concentration were in good agreement with the changes in strong ion difference and the amount of weak plasma acid. The 20% albumin solution possessed a pH of 6.95 and a titratable acidity of 8.5 [corrected] mEq/l. CONCLUSIONS According to the Stewart approach, the observed changes in acid-base balance are the net result of the two opposing effects of the strong ion difference and the amount of weak plasma acid. Alternatively, the acidifying effect of the 20% albumin solution may stem from the titratable acid content of the solution.
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Affiliation(s)
- Dirk Bruegger
- Clinic of Anesthesiology, Ludwig-Maximilians-University, Marchioninistrasse 15, 81377 Munich, Germany
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