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Maeda M, Yoshikawa Y, Ohno S, Chaki T, Yamakage M. Differences in circulating blood volume changes during emergence from general anesthesia in transcatheter aortic valve implantation and MitraClip implantation. J Anesth 2024:10.1007/s00540-024-03345-1. [PMID: 38761239 DOI: 10.1007/s00540-024-03345-1] [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: 12/12/2023] [Accepted: 03/31/2024] [Indexed: 05/20/2024]
Abstract
PURPOSE We aimed to compare changes in the circulating blood volume (CBV) during emergence from general anesthesia in patients undergoing transcatheter aortic valve implantation (TAVI) and MitraClip implantation. METHOD We included 97 patients who underwent TAVI or MitraClip implantation. The primary outcome was the rate of change in the estimated CBV associated with emergence from general anesthesia. The secondary outcomes were hemoglobin and hematocrit values before and after emergence from anesthesia for each procedure. Additionally, the independent factors associated with changes in the estimated CBV were assessed using multiple regression analysis. RESULTS In the TAVI group, the hemoglobin concentration increased from 9.6 g/dL before emergence from anesthesia to 10.8 g/dL after emergence (P < 0.001; mean difference, 1.2 g/dL, 95% confidence interval [CI] 1.1-1.3 g/dL). Conversely, no statistically significant change was observed in the hemoglobin concentration before and after emergence from anesthesia in the MitraClip group. The mean rate of change in the estimated CBV was - 15.4% (standard deviation [SD] 6.4%) in the TAVI group and - 2.4% (SD, 4.7%) in the MitraClip group, indicating a significant decrease in the estimated CBV in the former than in the latter (P < 0.001; mean difference, 13.0%; 95% CI 9.9-16.1%). CONCLUSION Emergence from general anesthesia increased the hemoglobin concentration and decreased the estimated CBV in patients undergoing TAVI but did not elicit significant changes in patients undergoing MitraClip implantation. These results may provide a rationale for minimizing blood transfusions during general anesthesia in patients undergoing these procedures.
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Affiliation(s)
- Makishi Maeda
- Department of Anesthesiology, Sapporo Medical University School of Medicine, 291, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, Japan.
| | - Yusuke Yoshikawa
- Department of Anesthesiology, Sapporo Medical University School of Medicine, 291, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Sho Ohno
- Department of Anesthesiology, Sapporo Medical University School of Medicine, 291, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Tomohiro Chaki
- Department of Anesthesiology, Sapporo Medical University School of Medicine, 291, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Michiaki Yamakage
- Department of Anesthesiology, Sapporo Medical University School of Medicine, 291, South 1, West 16, Chuo-ku, Sapporo, Hokkaido, Japan
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Andrei S, Nguyen M, Abou-Arab O, Bouhemad B, Guinot PG. Arterial Hypotension Following Norepinephrine Decrease in Septic Shock Patients Is Not Related to Preload Dependence: A Prospective, Observational Cohort Study. Front Med (Lausanne) 2022; 9:818386. [PMID: 35273979 PMCID: PMC8901484 DOI: 10.3389/fmed.2022.818386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/24/2022] [Indexed: 11/30/2022] Open
Abstract
Background The optimal management of hypotensive patients during norepinephrine weaning is unclear. The primary study aim was to assess the ability of preload dependence to predict hypotension following norepinephrine weaning. The secondary aims were to describe the effect of norepinephrine weaning on preload dependence, and the cardiovascular effects of fluid expansion in hypotensive patients following norepinephrine weaning. Materials and Methods This was a prospective observational monocentric study. We included PiCCO®-monitored patients with norepinephrine-treated septic shock, for whom the physician decided to decrease the norepinephrine dosage during the de-escalation phase. Three consecutive steps were evaluated with hemodynamic measurements: baseline, after norepinephrine decrease, and after 500 mL fluid expansion. Results Forty-five patients were included. Preload dependence assessed by stroke volume changes following passive leg raising was not predictive of pressure response to norepinephrine weaning [AUC of 0.42 (95%CI: 0.25–0.59, p = 0.395)]. After fluid expansion, there was no difference in the prior preload dependence between pressure-responders and non-pressure-responders (14 vs. 13%, p = 1). The pressure response to norepinephrine decrease was not associated with pressure response after fluid expansion (40 vs. 23%, p = 0.211). Conclusion Hypotension following norepinephrine decrease was not predicted by preload dependence, and there was no association between arterial hypotension after norepinephrine decrease and fluid response.
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Affiliation(s)
- Stefan Andrei
- Anaesthesiology and Critical Care Department, Dijon Bourgogne University Hospital, Dijon, France.,Anaesthesiology and Intensive Care Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Maxime Nguyen
- Anaesthesiology and Critical Care Department, Dijon Bourgogne University Hospital, Dijon, France.,University of Burgundy Franche Comté, Dijon, France
| | - Osama Abou-Arab
- Anaesthesiology and Critical Care Department, Amiens Picardie University Hospital, Dijon, France
| | - Belaid Bouhemad
- Anaesthesiology and Critical Care Department, Dijon Bourgogne University Hospital, Dijon, France.,University of Burgundy Franche Comté, Dijon, France
| | - Pierre-Grégoire Guinot
- Anaesthesiology and Critical Care Department, Dijon Bourgogne University Hospital, Dijon, France.,University of Burgundy Franche Comté, Dijon, France
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3
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Gunnström M, Zdolsek JH, Hahn RG. Plasma Volume Expansion and Fluid Kinetics of 20% Albumin During General Anesthesia and Surgery Lasting for More Than 5 Hours. Anesth Analg 2021; 134:1270-1279. [PMID: 34797221 DOI: 10.1213/ane.0000000000005802] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Intraoperative administration of crystalloid for plasma volume expansion may be reduced by use of hyperoncotic albumin. However, the degree of plasma volume expansion with administration of 20% albumin is poorly quantitated. We estimated the amount of volume expansion attributable to 20% albumin administration in patients undergoing surgery for more than 5 hours. METHODS Twenty percent albumin was delivered at 3 mL/kg by intravenous infusion during 30 minutes to 15 patients (mean ± standard deviation [SD] age; 46 ± 15 years) undergoing surgery. Blood samples and urine were collected for 5 hours. Mass balance calculations and volume kinetics were used to estimate plasma volume expansion and capillary leakage of albumin and fluid. RESULTS Administration of 20% albumin was associated with an increase in plasma volume amounting to 1.7 times the infused volume. After correction for hemorrhage, the median (and 25th to 75th percentiles) intravascular half-life for the administered albumin mass was 20.4 (14.2-34.7) hours. The plasma volume decreased with a half-life of 21.7 (16.1-26.8) hours. Urinary excretion was 3 times greater than the infused volume of albumin, but kinetic analysis suggested that other flows of fluid to and from the plasma occurred more slowly than previously found in volunteers. Hemodynamic support with norepinephrine increased urinary excretion and contracted the plasma volume. CONCLUSIONS Albumin (20%) increased the plasma volume by 1.7 times the infused volume. Our results do not support that the transcapillary leakage of albumin is accelerated by anesthesia and surgery.
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Affiliation(s)
- Michaela Gunnström
- From the Department of Anesthesia, Operation, and Intensive Care (ANOPIVA), and Department of Medical and Health Sciences (IMH), Linköping University, Linköping, Sweden
| | - Joachim H Zdolsek
- From the Department of Anesthesia, Operation, and Intensive Care (ANOPIVA), and Department of Medical and Health Sciences (IMH), Linköping University, Linköping, Sweden
| | - Robert G Hahn
- Research Unit, Södertälje Hospital, Södertälje, Sweden.,Karolinska Institutet at Danderyds Hospital (KIDS), Karolinska Institutet, Stockholm, Sweden
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Hahn RG, Drobin D. Model-predicted capillary leakage in graded hypotension: Extended analysis of experimental spinal anesthesia. Acta Anaesthesiol Scand 2021; 65:1313-1319. [PMID: 34028787 DOI: 10.1111/aas.13931] [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: 03/03/2021] [Revised: 04/23/2021] [Accepted: 05/16/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Crystalloid fluid infused during the induction of spinal anesthesia is involved in a complex set of physiological responses, including vasodilatation, reactive vasoconstriction, and changes in mean arterial pressure (MAP). The present evaluation compares the modeled capillary leakage in anesthetized versus nonanesthetized body regions. METHODS Ten female volunteers (mean age, 29 years) received 25 ml/kg of Ringer's acetate over 60 min during experimental spinal anesthesia. Blood hemoglobin was measured repeatedly in the radial artery (reference), arm (cubital) vein, and leg (femoral) vein for 240 min. Each pattern of data served as a dependent variable in volume kinetic analyses that used mixed models software and MAP as covariate. RESULTS The capillary leakage of fluid from the plasma to the extravascular space peaked at 17 ml/min when MAP was 100 mmHg, and the two venous curves were virtually identical. At MAP 60 mmHg, the rate was reduced to 10-12 ml/min when assessed in arterial blood and leg vein blood, but only 5 mmHg in blood collected from the arm vein. The distribution half-life of infused fluid was then 40 min in the leg and 80 min in the arm. These results suggest that vasoconstriction in nonanesthetized body regions halves the capillary leakage that is observed in vasodilated, anesthetized body regions. CONCLUSION Graded hypotension during spinal anesthesia reduced the capillary filtration of fluid as determined by volume kinetic analysis. The effect was twice as great when venous blood was sampled from a nonanesthetized body region than from an anesthetized body region.
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Affiliation(s)
- Robert G. Hahn
- Karolinska InstituteDanderyds Hospital (KIDS) Stockholm Sweden
- Research UnitSödertälje Hospital Södertälje Sweden
| | - Dan Drobin
- Division of Surgical Care Jönköping County Council Jönköping Sweden
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Damén T, Kolsrud O, Dellgren G, Hesse C, Ricksten S, Nygren A. Atrial natriuretic peptide does not degrade the endothelial glycocalyx: A secondary analysis of a randomized porcine model. Acta Anaesthesiol Scand 2021; 65:1305-1312. [PMID: 33991333 DOI: 10.1111/aas.13853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/27/2021] [Accepted: 04/30/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND The atrial natriuretic peptide (ANP) released from the heart regulates intravascular volume and is suspected to increase capillary permeability. Contradictory results regarding ANP and glycocalyx degradation have been reported. The aim of this study was to investigate if an infusion of ANP causes degradation of the endothelial glycocalyx. METHODS Twenty pigs, pretreated with 250 mg methylprednisolone, were randomized to receive an infusion of either ANP (50 ng/kg/min) (n = 10) or 0.9% NaCl (n = 10) during 60 min. Endothelial glycocalyx components (heparan sulphate proteoglycan and hyaluronic acid), Hct, calculated plasma volume and colloid osmotic pressure were measured from baseline to 60 min. RESULTS There was no difference between the control and intervention groups for heparan sulphate proteoglycan and hyaluronic acid corrected for the change in plasma volume (P = .333 and 0.197). Hct increased with 1.8 ± 2.2% in the intervention group (P = .029) with no change -0.5 ± 2.3% in the control group (P = .504). The plasma volume decreased in the intervention group with -8.4 ± 10% (P = .034) with no change in the control group 3.1 ± 12% (P = .427). Median changes in colloid osmotic pressures in the control and intervention group were -0.39 [95% CI, -1.88-0.13] and 0.9 [95% CI, 0.00-1.58], respectively (P = .012). CONCLUSIONS In this randomized porcine study, an ANP infusion did not cause endothelial glycocalyx degradation but decreased the plasma volume most probably due to precapillary vasodilation and increased filtration.
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Affiliation(s)
- Tor Damén
- Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg, and Sahlgrenska University HospitalSection of Cardiothoracic Anaesthesia and Intensive Care Gothenburg Sweden
| | - Oscar Kolsrud
- Department of Cardiothoracic Surgery Sahlgrenska University HospitalSahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
| | - Göran Dellgren
- Department of Cardiothoracic Surgery Sahlgrenska University HospitalSahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
- Transplant Institute Sahlgrenska University HospitalSahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
| | - Camilla Hesse
- Department of Laboratory Medicine Institute of Biomedicine Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
| | - Sven‐Erik Ricksten
- Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg, and Sahlgrenska University HospitalSection of Cardiothoracic Anaesthesia and Intensive Care Gothenburg Sweden
| | - Andreas Nygren
- Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg, and Sahlgrenska University HospitalSection of Cardiothoracic Anaesthesia and Intensive Care Gothenburg Sweden
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Vasopressor Responsiveness Beyond Arterial Pressure: A Conceptual Systematic Review Using Venous Return Physiology. Shock 2021; 56:352-359. [PMID: 33756500 DOI: 10.1097/shk.0000000000001762] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT We performed a systematic review to investigate the effects of vasopressor-induced hemodynamic changes in adults with shock. We applied a physiological approach using the interacting domains of intravascular volume, heart pump performance, and vascular resistance to structure the interpretation of responses to vasopressors. We hypothesized that incorporating changes in determinants of cardiac output and vascular resistance better reflect the vasopressor responsiveness beyond mean arterial pressure alone.We identified 28 studies including 678 subjects in Pubmed, EMBASE, and CENTRAL databases.All studies demonstrated significant increases in mean arterial pressure (MAP) and systemic vascular resistance during vasopressor infusion. The calculated mean systemic filling pressure analogue increased (16 ± 3.3 mmHg to 18 ± 3.4 mmHg; P = 0.02) by vasopressors with variable effects on central venous pressure and the pump efficiency of the heart leading to heterogenous changes in cardiac output. Changes in the pressure gradient for venous return and cardiac output, scaled by the change in MAP, were positively correlated (r2 = 0.88, P < 0.001). Changes in the mean systemic filling pressure analogue and heart pump efficiency were negatively correlated (r2 = 0.57, P < 0.001) while no correlation was found between changes in MAP and heart pump efficiency.We conclude that hemodynamic changes induced by vasopressor therapy are inadequately represented by the change in MAP alone despite its common use as a clinical endpoint. The more comprehensive analysis applied in this review illustrates how vasopressor administration may be optimized.
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Damén T, Saadati S, Forssell‐Aronsson E, Hesse C, Bentzer P, Ricksten S, Nygren A. Effects of different mean arterial pressure targets on plasma volume, ANP and glycocalyx-A randomized trial. Acta Anaesthesiol Scand 2021; 65:220-227. [PMID: 32965691 PMCID: PMC7820977 DOI: 10.1111/aas.13710] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/31/2020] [Accepted: 09/06/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Arterial haematocrit (Hct) has been shown to decrease after anaesthesia induction, most probably because of an increased plasma volume (PV). The primary objective was to quantify change in PV if mean arterial pressure (MAP) was kept at baseline level or allowed to decrease to 60 mm Hg. Our secondary objective was to evaluate underlying mechanisms of this response. METHODS Twenty-four coronary artery bypass patients were randomized to a higher (90 mm Hg, intervention group) or lower (60 mm Hg, control group) MAP by titration of norepinephrine. During the experimental procedure, no fluids were administered. Baseline PV was measured by 125 I-albumin and the change in PV was calculated from the change in Hct. Changes in MAP, plasma 125 I-albumin, colloid osmotic pressure, albumin, Mid Regional-pro Atrial Natriuretic Peptide (MR-proANP) and endothelial glycocalyx components were measured from baseline to 50 minutes after anaesthesia induction. RESULTS The MAP during the trial was 93 ± 9 mm Hg in the intervention group and 62 ± 5 mm Hg in the control group. PV increased with up to 420 ± 180 mL in the control group and 45 ± 130 mL in the intervention group (P < .001). Albumin and colloid osmotic pressure decreased significantly more in the control group. MR-proANP increased in the control group but no shedding of the glycocalyx layer was detected in either of the groups. CONCLUSION Allowing mean arterial pressure to fall to 60 mm Hg during anaesthesia induction, increases the plasma volume due to reabsorption of interstitial water, with no ANP-induced degradation of the endothelial glycocalyx.
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Affiliation(s)
- Tor Damén
- Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care Sahlgrenska University Hospital Gothenburg Sweden
| | - Sofia Saadati
- Department of Radiation Physics Institute of Clinical Sciences Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
| | - Eva Forssell‐Aronsson
- Department of Radiation Physics Institute of Clinical Sciences Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
- Department of Medical Physics and Biomedical Engineering Sahlgrenska University Hospital Gothenburg Sweden
| | - Camilla Hesse
- Department of Laboratory Medicine Institute of Biomedicine Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
| | - Peter Bentzer
- Department of Anaesthesia and Intensive Care Helsingborg HospitalHelsingborg and Lund University Helsingborg Sweden
- Department of Clinical Sciences Anaesthesiology Lund University Lund Sweden
| | - Sven‐Erik Ricksten
- Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care Sahlgrenska University Hospital Gothenburg Sweden
| | - Andreas Nygren
- Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care Sahlgrenska University Hospital Gothenburg Sweden
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8
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Chen JL, Chen YL, Qi B, Pan ZY, Lu YF, Zhang W, Zhu J, Yu WF, Song JC, Lu YG. Impact of Intraoperative Norepinephrine Support on Living Donor Liver Transplantation Outcomes: A Retrospective Cohort Study of 430 Children. Front Pharmacol 2020; 11:1254. [PMID: 32922292 PMCID: PMC7456957 DOI: 10.3389/fphar.2020.01254] [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: 09/26/2019] [Accepted: 07/30/2020] [Indexed: 11/13/2022] Open
Abstract
Norepinephrine (NE) is often administered during the perioperative period of liver transplantation to address hemodynamic instability and to improve organ perfusion and oxygen supply. However, its role and safety profile have yet to be evaluated in pediatric living donor liver transplantation (LDLT). We hypothesized that intraoperative NE infusion might affect pediatric LDLT outcomes. A retrospective study of 430 pediatric patients (median [interquartile range] age, 7 [6.10] months; 189 [43.9%] female) receiving LDLT between 2014 and 2016 at Renji Hospital was conducted. We evaluated patient survival among recipients who received intraoperative NE infusion (NE group, 85 recipients) and those that did not (non-NE group, 345 recipients). The number of children aged over 24 months and weighing more than 10 kg in NE group was more than that in non-NE group. And children in NE group had longer operative time, longer anhepatic phase time and more fluid infusion. After multivariate regression analysis and propensity score regression adjusting for confounding factors to determine the influence of intraoperative NE infusion on patient survival, the NE group had a 169% more probability of dying. Although there was no difference in mean arterial pressure changes relative to the baseline between the two groups, we did observe increased heart rates in NE group compared with those of the non-NE group at anhepatic phase (P=0.025), neohepatic phase (P=0.012) and operation end phase (P=0.017) of the operation. In conclusion, intraoperative NE infusion was associated with a poorer prognosis for pediatric LDLT recipients. Therefore, we recommend the application of NE during pediatric LDLT should be carefully re-considered.
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Affiliation(s)
- Jiang-Long Chen
- Department of Anesthesiology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China.,Department of General Surgery, Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuan-Li Chen
- Department of Anesthesiology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Bo Qi
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhi-Ying Pan
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ye-Feng Lu
- Department of Hepatic Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Zhang
- Department of Biostatistics, School of Public Health, Fudan University, Shanghai, China
| | - Jiao Zhu
- Department of Anesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai, China
| | - Wei-Feng Yu
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin-Chao Song
- Department of Anesthesiology, Shidong Hospital of Shanghai, University of Shanghai for Science and Technology, Shanghai, China
| | - Yu-Gang Lu
- Department of Anesthesiology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Toyoda D, Maki Y, Sakamoto Y, Kinoshita J, Abe R, Kotake Y. Comparison of volume and hemodynamic effects of crystalloid, hydroxyethyl starch, and albumin in patients undergoing major abdominal surgery: a prospective observational study. BMC Anesthesiol 2020; 20:141. [PMID: 32493281 PMCID: PMC7271551 DOI: 10.1186/s12871-020-01051-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 05/24/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The volume effect of iso-oncotic colloid is supposedly larger than crystalloid, but such differences are dependent on clinical context. The purpose of this single center observational study was to compare the volume and hemodynamic effects of crystalloid solution and colloid solution during surgical manipulation in patients undergoing major abdominal surgery. METHODS Subjects undergoing abdominal surgery for malignancies with intraoperative goal-directed fluid management were enrolled in this observational study. Fluid challenges consisted with 250 ml of either bicarbonate Ringer solution, 6% hydroxyethyl starch or 5% albumin were provided to maintain optimal stroke volume index. Hematocrit derived-plasma volume and colloid osmotic pressure was determined immediately before and 30 min after the fluid challenge. Data were expressed as median (IQR) and statistically compared with Kruskal-Wallis test. RESULTS One hundred thirty-nine fluid challenges in 65 patients were analyzed. Bicarbonate Ringer solution, 6% hydroxyethyl starch and 5% albumin were administered in 42, 49 and 48 instances, respectively. Plasma volume increased 7.3 (3.6-10.0) % and 6.3 (1.4-8.8) % 30 min after the fluid challenge with 6% hydroxyethyl starch and 5% albumin and these values are significantly larger than the value with bicarbonate Ringer solution (1.0 (- 2.7-2.3) %) Colloid osmotic pressure increased 0.6 (0.2-1.2) mmHg after the fluid challenge with 6% hydroxyethyl starch and 0.7(0.2-1.3) mmHg with 5% albumin but decreased 0.6 (0.2-1.2) mmHg after the fluid challenge with bicarbonate Ringer solution. The area under the curve of stroke volume index after fluid challenge was significantly larger after 6% hydroxyethyl starch or 5% albumin compared to bicarbonate Ringer solution. CONCLUSIONS Fluid challenge with 6% hydroxyethyl starch and 5% albumin showed significantly larger volume and hemodynamic effects compared to bicarbonate Ringer solution during gastrointestinal surgery. TRIAL REGISTRATION UMIN Clinical Trial Registry UMIN000017964. Registered July 01, 2015.
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Affiliation(s)
- Daisuke Toyoda
- Department of Anesthesiology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro, Tokyo, 153-8515, Japan.
| | - Yuichi Maki
- Department of Anesthesiology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro, Tokyo, 153-8515, Japan
| | - Yasumasa Sakamoto
- Department of Anesthesiology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro, Tokyo, 153-8515, Japan
| | - Junki Kinoshita
- Department of Anesthesiology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro, Tokyo, 153-8515, Japan
| | - Risa Abe
- Department of Anesthesiology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro, Tokyo, 153-8515, Japan
| | - Yoshifumi Kotake
- Department of Anesthesiology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro, Tokyo, 153-8515, Japan
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10
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Reconsidering Vasopressors for Cardiogenic Shock. Chest 2019; 156:392-401. [DOI: 10.1016/j.chest.2019.03.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 12/27/2022] Open
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Skytte Larsson J, Bragadottir G, Redfors B, Ricksten SE. Renal effects of norepinephrine-induced variations in mean arterial pressure after liver transplantation: A randomized cross-over trial. Acta Anaesthesiol Scand 2018; 62:1229-1236. [PMID: 29896798 DOI: 10.1111/aas.13156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 12/18/2022]
Abstract
BACKGROUND Acute kidney injury is commonly seen after liver transplantation. The optimal perioperative target mean arterial pressure (MAP) for renal filtration, perfusion and oxygenation in liver recipients is not known. The effects of norepinephrine-induced changes in MAP on renal blood flow (RBF), oxygen delivery (RDO2 ), glomerular filtration rate (GFR) and renal oxygenation (=renal oxygen extraction, RO2 Ex) were therefore studied early after liver transplantation. METHODS Ten patients with an intra- and post-operative vasopressor-dependent systemic vasodilation were studied early after liver transplantation during sedation and mechanical ventilation. To achieve target MAP levels of 60, 75 and 90 mm Hg, the norepinephrine infusion rate was randomly and sequentially titrated. At each target MAP, data on cardiac index (CI), RBF and GFR were obtained by transpulmonary thermodilution (PiCCO), the renal vein thermodilution technique and renal extraction of chromium ethylenediaminetetraaceticacid (51 Cr-EDTA), respectively. Renal oxygen consumption (RVO2 ) and extraction (RO2 Ex) were calculated according to standard formulas. RESULTS At a target MAP of 75 mm Hg, CI (13%), RBF (18%), RDO2 (24%), GFR (31%) and RVO2 (20%) were higher while RO2 Ex was unchanged compared to a target MAP of 60 mm Hg. Increasing MAP from 75 up to 90 mm Hg increased RVR by 38% but had no further effects on CI, RBF, RDO2 or GFR. CONCLUSIONS In patients undergoing liver transplantation, RBF and GFR are pressure-dependent at MAP levels below 75 mm Hg. Our results suggest that MAP should probably be targeted to approximately 75 mm Hg for optimal perioperative renal filtration, perfusion and oxygenation in patients undergoing liver transplantation.
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Affiliation(s)
- J. Skytte Larsson
- Department of Anaesthesiology and Intensive Care Medicine; Institution of Clinical Sciences; Sahlgrenska Academy; University of Gothenburg; Sahlgrenska University Hospital; Gothenburg Sweden
| | - G. Bragadottir
- Department of Anaesthesiology and Intensive Care Medicine; Institution of Clinical Sciences; Sahlgrenska Academy; University of Gothenburg; Sahlgrenska University Hospital; Gothenburg Sweden
| | - B. Redfors
- Department of Anaesthesiology and Intensive Care Medicine; Institution of Clinical Sciences; Sahlgrenska Academy; University of Gothenburg; Sahlgrenska University Hospital; Gothenburg Sweden
| | - S.-E. Ricksten
- Department of Anaesthesiology and Intensive Care Medicine; Institution of Clinical Sciences; Sahlgrenska Academy; University of Gothenburg; Sahlgrenska University Hospital; Gothenburg Sweden
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Abstract
Background Hemodynamic instability responsive to fluid resuscitation is common after a traumatic brain injury (TBI), also in the absence of systemic hemorrhage. The present study tests if an isolated severe TBI induces a decrease in plasma volume (PV). Methods The study was performed in three groups of anesthetized and tracheostomized male cats (n = 21). In one group (n = 8), the cats were prepared with a cranial borehole (10 mm i.d) used to expose the brain to a fluid percussion brain injury (FPI) (1.90–2.20 bar), and two smaller cranial boreholes (4 mm i.d) for insertion of an intracranial pressure (ICP) and a microdialysis catheter. To differentiate the effect of FPI from that of the surgical preparation, a sham group was exposed to the same surgical preparation but no FPI trauma (n = 8). A control group had no brain trauma and no surgical preparation (n = 5). PV was determined by a 125I-albumin dilution technique. PV, electrolytes, pH, BE (base excess), hematocrit (Hct), PaO2, and PaCO2 were measured at baseline and after 3 h. Mean arterial pressure (MAP) was measured continuously. ICP was measured in the FPI and the sham group. Results In the FPI group, PV decreased by 11.2 mL/kg from 31.7 mL/kg (p < 0.01) with a simultaneous increase in Hct and decrease in pH. In the sham group, PV decreased by 5.7 mL/kg from 32.7 mL/kg (p < 0.01). The control group showed no PV reduction. Conclusions The results support that an isolated severe head trauma triggers a significant and rapid reduction in PV, most likely due to vascular leak.
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Affiliation(s)
- Peter Bentzer
- Department of Clinical Sciences, Anesthesiology and Intensive Care, Helsingborg Hospital, Lund University, Lund, Sweden
- Department of Clinical Sciences, Anesthesiology and Intensive Care, Lund University Hospital, Lund University, 22185, Lund, Sweden
| | - Per-Olof Grände
- Department of Clinical Sciences, Anesthesiology and Intensive Care, Lund University Hospital, Lund University, 22185, Lund, Sweden.
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Grände PO. Critical Evaluation of the Lund Concept for Treatment of Severe Traumatic Head Injury, 25 Years after Its Introduction. Front Neurol 2017; 8:315. [PMID: 28725211 PMCID: PMC5495987 DOI: 10.3389/fneur.2017.00315] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 06/16/2017] [Indexed: 12/24/2022] Open
Abstract
When introduced in 1992, the Lund concept (LC) was the first complete guideline for treatment of severe traumatic brain injury (s-TBI). It was a theoretical approach, based mainly on general physiological principles-i.e., of brain volume control and optimization of brain perfusion and oxygenation of the penumbra zone. The concept gave relatively strict outlines for cerebral perfusion pressure, fluid therapy, ventilation, sedation, nutrition, the use of vasopressors, and osmotherapy. The LC strives for treatment of the pathophysiological mechanisms behind symptoms rather than just treating the symptoms. The treatment is standardized, with less need for individualization. Alternative guidelines published a few years later (e.g., the Brain Trauma Foundation guidelines and European guidelines) were mainly based on meta-analytic approaches from clinical outcome studies and to some extent from systematic reviews. When introduced, they differed extensively from the LC. We still lack any large randomized outcome study comparing the whole concept of BTF guidelines with other guidelines including the LC. From that point of view, there is limited clinical evidence favoring any of the s-TBI guidelines used today. In principle, the LC has not been changed since its introduction. Some components of the alternative guidelines have approached those in the LC. In this review, I discuss some important principles of brain hemodynamics that have been lodestars during formulation of the LC. Aspects of ventilation, nutrition, and temperature control are also discussed. I critically evaluate the most important components of the LC 25 years after its introduction, based on hemodynamic principles and on the results of own an others experimental and human studies that have been published since then.
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Affiliation(s)
- Per-Olof Grände
- Anesthesia and Intensive Care, Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, Lund, Sweden
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Damén T, Reinsfelt B, Redfors B, Nygren A. Pressure-dependent changes in haematocrit and plasma volume during anaesthesia, a randomised clinical trial. Acta Anaesthesiol Scand 2016; 60:560-8. [PMID: 26792419 DOI: 10.1111/aas.12687] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 11/24/2015] [Accepted: 11/25/2015] [Indexed: 12/21/2022]
Abstract
BACKGROUND Induction of general anaesthesia has been shown to cause haemodilution and an increase in plasma volume. The aim of this study was to evaluate whether prevention of hypotension during anaesthesia induction could avoid haemodilution. METHODS Twenty-four cardiac surgery patients, 66 ± 10 years, were randomised to receive either norepinephrine in a dose needed to maintain mean arterial blood pressure (MAP) at pre-anaesthesia levels after induction or to a control group that received vasopressor if MAP decreased below 60 mmHg. No fluids were infused. Changes in plasma volume were calculated with standard formula: 100 × (Hct(pre)/Hct(post) - 1)/(1 - Hct(pre)). Arterial blood gas was analysed every 10 minutes and non-invasive continuous haemoglobin (SpHb) was continuously measured. RESULTS Pre-anaesthesia MAP was 98 ± 7 mmHg. Ten minutes after anaesthesia induction, the haematocrit decreased by 5.0 ± 2.5% in the control group compared with 1.2 ± 1.4% in the intervention group, which corresponds to increases in plasma volume by 310 ml and 85 ml respectively. MAP decreased to 69 ± 15 mmHg compared to 92 ± 10 mmHg in the intervention group. The difference maintained throughout the 70 min intervention period. The change in haemoglobin level measured by blood gas analysis could not be detected by SpHb measurement. The mean bias between the SpHb and blood gas haemoglobin was 15 g/l. CONCLUSION During anaesthesia induction, haematocrit decreases and plasma volume increases early and parallel to a decrease in blood pressure. This autotransfusion is blunted when blood pressure is maintained at pre-induction levels with norepinephrine.
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Affiliation(s)
- T. Damén
- Department of Anaesthesiology and Intensive Care Medicine; Institute of Clinical Sciences at the Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care; Sahlgrenska University Hospital; Gothenburg Sweden
| | - B. Reinsfelt
- Department of Anaesthesiology and Intensive Care Medicine; Institute of Clinical Sciences at the Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care; Sahlgrenska University Hospital; Gothenburg Sweden
| | - B. Redfors
- Department of Anaesthesiology and Intensive Care Medicine; Institute of Clinical Sciences at the Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care; Sahlgrenska University Hospital; Gothenburg Sweden
| | - A. Nygren
- Department of Anaesthesiology and Intensive Care Medicine; Institute of Clinical Sciences at the Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Section of Cardiothoracic Anaesthesia and Intensive Care; Sahlgrenska University Hospital; Gothenburg Sweden
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Norberg Å, Rooyackers O, Segersvärd R, Wernerman J. Leakage of albumin in major abdominal surgery. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2016; 20:113. [PMID: 27117323 PMCID: PMC4845320 DOI: 10.1186/s13054-016-1283-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 04/01/2016] [Indexed: 11/29/2022]
Abstract
Background The time course of plasma albumin concentration (P-alb) and cumulative perioperative albumin shift as a measure of albumin extravasation in major abdominal surgery is not well described. Knowledge of these indices of the vascular barrier and vascular content are important for our understanding of fluid physiology during surgery and anesthesia. Methods Patients (n = 10) were studied during esophageal or pancreatic surgery. P-alb was repeatedly measured over 72 h, and the mass balance of albumin and hemoglobin were obtained from measures of P-alb, blood hemoglobin and hematocrit. Results P-alb decreased rapidly from baseline (32.8 ± 4.8 g/L) until the start of surgical reconstruction (18.7 ± 4.8 g/L; p < 0.001), and was thereafter stable until postoperative day 3. Cumulative perioperative albumin shift increased until 1 h after the end of surgery, when 24 ± 17 g (p < 0.001) had been lost from the circulation. Conclusions The rapid fall in P-alb of more than 40 % consistently occurred during the first part of the surgical procedure, but albumin leakage progressed until 1 h after the end of surgery. After the initial drop, P-alb was stable for 72 h. Electronic supplementary material The online version of this article (doi:10.1186/s13054-016-1283-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Åke Norberg
- Department of Anaesthesia and Intensive Care, Karolinska University Hospital Huddinge, Hälsovägen, SE-141 86, Stockholm, Sweden. .,Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Hälsovägen, SE-141 86, Stockholm, Sweden.
| | - Olav Rooyackers
- Department of Anaesthesia and Intensive Care, Karolinska University Hospital Huddinge, Hälsovägen, SE-141 86, Stockholm, Sweden.,Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Hälsovägen, SE-141 86, Stockholm, Sweden
| | - Ralf Segersvärd
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Hälsovägen, SE-141 86, Stockholm, Sweden.,Division of Surgery, Karolinska University Hospital Huddinge, Hälsovägen, SE-141 86, Stockholm, Sweden
| | - Jan Wernerman
- Department of Anaesthesia and Intensive Care, Karolinska University Hospital Huddinge, Hälsovägen, SE-141 86, Stockholm, Sweden.,Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Hälsovägen, SE-141 86, Stockholm, Sweden
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Tatara T. Context-sensitive fluid therapy in critical illness. J Intensive Care 2016; 4:20. [PMID: 26985394 PMCID: PMC4793702 DOI: 10.1186/s40560-016-0150-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/11/2016] [Indexed: 12/19/2022] Open
Abstract
Microcirculatory alterations are frequently observed in critically ill patients undergoing major surgery and those who suffer from trauma or sepsis. Despite the need for adequate fluid administration to restore microcirculation, there is no consensus regarding optimal fluid therapy for these patients. The recent recognition of the importance of the endothelial glycocalyx layer in capillary fluid and solute exchange has largely changed our views on fluid therapy in critical illness. Given that disease status largely differs among critically ill patients, fluid therapy must not be considered generally, but rather tailored to the clinical condition of each patient. This review outlines the current understanding of context-sensitive volume expansion by fluid solutions and considers its clinical implications for critically ill patients. The modulation of capillary hydrostatic pressure through the appropriate use of vasopressors may increase the effectiveness of fluid infusion and thereby reduce detrimental effects resulting from excessive fluid administration.
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Affiliation(s)
- Tsuneo Tatara
- Department of Anesthesiology and Pain Medicine, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501 Japan
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Abstract
Recent research has identified promising targets for therapeutic interventions aimed at modulating the inflammatory response in sepsis. Herein, the authors describe mechanisms involved in the clearance of pathogen toxin from the circulation and potential interventions aimed at enhancing clearance mechanisms. The authors also describe advances in the understanding of the innate immune response as potential therapeutic targets. Finally, novel potential treatment strategies aimed at decreasing vascular leak are discussed.
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Affiliation(s)
- Peter Bentzer
- Centre for Heart Lung Innovation, University of British Columbia, Vancouver, British Columbia, Canada; Division of Critical Care Medicine, St. Paul's Hospital, University of British Columbia, 1081 Burrard Street, Vancouver, British Columbia V6Z 1Y6, Canada; Department of Anesthesiology and Intensive Care, Lund University, Lund SE-221 85, Sweden
| | - James A Russell
- Centre for Heart Lung Innovation, University of British Columbia, Vancouver, British Columbia, Canada; Division of Critical Care Medicine, St. Paul's Hospital, University of British Columbia, 1081 Burrard Street, Vancouver, British Columbia V6Z 1Y6, Canada
| | - Keith R Walley
- Centre for Heart Lung Innovation, University of British Columbia, Vancouver, British Columbia, Canada; Division of Critical Care Medicine, St. Paul's Hospital, University of British Columbia, 1081 Burrard Street, Vancouver, British Columbia V6Z 1Y6, Canada.
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18
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Severe traumatic brain injury management and clinical outcome using the Lund concept. Neuroscience 2014; 283:245-55. [DOI: 10.1016/j.neuroscience.2014.06.039] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 02/04/2023]
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Plasma volume expansion by 0.9% NaCl during sepsis/systemic inflammatory response syndrome, after hemorrhage, and during a normal state. Shock 2014; 40:59-64. [PMID: 23649099 DOI: 10.1097/shk.0b013e3182986a62] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The objective of this study was to determine the degree of plasma volume expansion by 0.9% NaCl in relation to the infused volume, in sepsis/systemic inflammatory response syndrome (SIRS), after a standardized hemorrhage, and in a normal condition. DESIGN Prospective, randomized animal study. SETTING The study was performed at a university hospital laboratory. SUBJECTS Thirty anesthetized adult male rats were included in the study. INTERVENTIONS The study was performed in three groups: a sepsis/SIRS group (the S group), in which sepsis/SIRS was induced by cecal ligation and incision; a hemorrhage group (the H group), in which the rats were left without intervention for 4 h and bled 8 mL/kg thereafter; and a group that was left without intervention (the N group). Then, 4 h after baseline, all three groups were given an infusion of 0.9% NaCl (32 mL/kg) for 15 min. Baseline was defined as the time point when the surgical preparation was finished. MEASUREMENTS AND MAIN RESULTS Plasma volumes were measured using I-albumin dilution technique at baseline, after 4 h, and 20 min after the end of infusion. The plasma volume-expanding effect 20 min after end of infusion was 0.6% ± 2.9% in the S group, 20% ± 6.4% in the H group, and 12% ± 11% in the N group, compared with just before start of infusion. CONCLUSIONS The present study in rats showed that the plasma volume-expanding effect after an infusion of 0.9% NaCl was smaller in a septic/SIRS state than after hemorrhage and in a normal state. This indicates that the plasma volume-expanding effect of a crystalloid is dependent on pathophysiologic changes in sepsis/SIRS.
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BARK BP, GRÄNDE PO. Infusion rate and plasma volume expansion of dextran and albumin in the septic guinea pig. Acta Anaesthesiol Scand 2014; 58:44-51. [PMID: 24251847 DOI: 10.1111/aas.12228] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Intravenous fluid treatment of hypovolaemia in states of increased capillary permeability, e.g. sepsis, is often accompanied by adverse oedema formation. A challenge is therefore to achieve and maintain normovolaemia using as little plasma volume substitution as possible to minimise interstitial oedema. In the present study, we evaluated the importance of infusion rate for the plasma volume expanding effects of 6% dextran 70 and 5% human albumin in a guinea pig sepsis model. METHODS In this prospective, randomised study, 50 anaesthetised adult male Dunkin-Hartley guinea pigs were used. After laparotomy, sepsis was induced by caecal ligation and incision. Three hours later, an infusion (12 ml/kg) of one of the studied fluids was given either over 15 min (bolus group) or over 3 h (continuous group). A sham group underwent the same surgical procedure but did not receive any fluid. RESULTS At the end of the experiment 3 h after the start of infusion, plasma volumes in the continuous group and the bolus group, respectively, were: 47.2 ± 5.3 ml/kg and 36.5 ± 3.9 ml/kg (P < 0.001) for 6% dextran 70, and 47.3 ± 7.5 ml/kg and 39.7 ± 2.8 ml/kg (P < 0.01) for 5% albumin. Plasma volume for the sham group at the same time point was 29.9 ± 3.3 ml/kg. CONCLUSIONS The study performed on a guinea pig sepsis model showed that the plasma volume expanding effects of fixed volumes of 6% dextran 70 and 5% albumin were greater when given at a slow than at a fast infusion rate.
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Affiliation(s)
- B. P. BARK
- Department of Anaesthesia and Intensive Care; Lund University and Lund University Hospital; Lund Sweden
| | - P.-O. GRÄNDE
- Department of Anaesthesia and Intensive Care; Lund University and Lund University Hospital; Lund Sweden
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Panwar R, Lanyon N, Davies AR, Bailey M, Pilcher D, Bellomo R. Mean perfusion pressure deficit during the initial management of shock--an observational cohort study. J Crit Care 2013; 28:816-24. [PMID: 23849541 DOI: 10.1016/j.jcrc.2013.05.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 04/09/2013] [Accepted: 05/15/2013] [Indexed: 01/20/2023]
Abstract
PURPOSE It is unclear if blood pressure targets for patients with shock should be adjusted to pre-morbid levels. We aimed to investigate mean deficit between the achieved mean perfusion pressure (MPP) in vasopressor-treated patients and their estimated basal (resting) MPP, and assess whether MPP deficit has any association with subsequent acute kidney injury (AKI). MATERIALS AND METHODS Fifty-one consecutive, non-trauma patients, aged ≥40 years, with ≥2 organ dysfunction and requiring vasopressor≥4 hours were observed at an academic intensive care unit. Mean MPP deficit [=%(basal MPP-achieved MPP)/basal MPP] and % time spent with >20% MPP deficit were assessed during initial 72 vasopressor hours (T0-T72) for each patient. RESULTS Achieved MPP was unrelated to basal MPP (P=.99). Mean MPP deficit was 18% (95% CI 15-21). Patients spent 48% (95% CI 39-57) time with >20% MPP deficit. Despite similar risk scores at T0, subsequent AKI (≥2 RIFLE class increase from T0) occurred more frequently in patients with higher (>median) MPP deficit compared to patients with lower MPP deficit (56% vs 28%; P=.045). Incidence of subsequent AKI was also higher among patients who spent greater % time with >20% MPP deficit (P=.04). CONCLUSIONS Achieved blood pressure during vasopressor therapy had no relationship to the pre-morbid basal level. This resulted in significant and varying degree of relative hypotension (MPP deficit), which could be a modifiable risk factor for AKI in patients with shock.
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Affiliation(s)
- Rakshit Panwar
- Department of Anaesthesia, Intensive Care and Pain Medicine, John Hunter Hospital, Newcastle 2305, Australia.
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Importance of the infusion rate for the plasma expanding effect of 5% albumin, 6% HES 130/0.4, 4% gelatin, and 0.9% NaCl in the septic rat. Crit Care Med 2013; 41:857-66. [PMID: 23318490 DOI: 10.1097/ccm.0b013e318274157e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To compare the plasma volume (PV) expanding effect of a fast infusion rate with that of a slow infusion rate of a fixed volume of 5% albumin, of the synthetic colloids, 6% hydroxyethyl starch 130/0.4 and 4% gelatin, and of 0.9% NaCl in a rat sepsis model and to compare the plasma-expanding effect among these fluids. DESIGN Prospective, randomized animal study. SETTING University hospital laboratory. SUBJECTS One hundred and twelve adult male rats. INTERVENTIONS Sepsis was induced by cecal ligation and incision followed by closure of the abdomen. After 3 hrs, an infusion of the PV expander under study was started at a volume of 12mL/kg for the colloids and of 48mL/kg for 0.9% NaCl, either for 15 mins or for 3 hrs. A control group underwent the same experimental procedure but no fluid was given. MEASUREMENTS AND MAIN RESULTS Three hours after start of the infusion (end of experiment), the plasma-expanding effect was better with a slow than a fast infusion rate for the colloids, especially albumin, but the NaCl groups did not differ significantly from the control group. The PV for the control group was 28.7±3mL/kg. In the slow and the fast infusion groups, it was 38.9±4.3 and 32.6±4.2mL/kg for albumin (p < 0.001), 32.9±4.3 and 29.5±4.4mL/kg for hydroxyethyl starch 130/0.4 (p < 0.05), 31.8±3.9 and 28.2±4.1mL/kg for gelatin (p < 0.05), and 31.8±5.3 and 30.7±6.6mL/kg for NaCl (n.s), respectively. CONCLUSIONS The study showed that the PV expansion by a colloid was greater when given at a slow than at a fast infusion rate, an effect more pronounced for albumin. This difference was not seen for NaCl. The PV-expanding effect was poor for NaCl and better for albumin than for the other colloids.
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Abstract
Two different main concepts for the treatment of a severe traumatic brain injury have been established during the last 15 years, namely the more conventional concept recommended in well-established guidelines (eg, U.S. Guideline, European Guideline, Addelbrook's Guideline from Cambridge), on the one hand, and the Lund concept from the University Hospital of Lund, Sweden, on the other. Owing to the lack of well-controlled randomized outcome studies comparing these 2 main therapeutic approaches, we cannot conclude that one is better than the other. This paper is the PRO part in a PRO-CON debate in this journal on the Lund concept. Although the Lund concept is based on a physiology-oriented approach dealing with the hemodynamic principles of brain volume and brain perfusion regulation, traditional treatments are primarily based on a meta-analytic approach from clinical studies. High cerebral perfusion pressure has been an essential goal in the conventional treatments (the cerebral perfusion pressure-guided approach), even though it has been modified in a recent up date of U.S. guidelines. The Lund concept has instead concentrated on management of brain edema and intracranial pressure, along with improvement of cerebral perfusion and oxygenation (the intracranial pressure and perfusion-guided approach). Although conventional guidelines are restricted to clinical data from meta-analytic surveys, the physiological approach of Lund therapy finds support in both experimental and clinical studies. It offers a wider base and can also provide recommendations regarding fluid therapy, lung protection, optimal hemoglobin concentration, temperature control, the use of decompressive craniotomy, and ventricular drainage. This paper puts forward arguments in support of Lund therapy.
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