Effect of protective solutions and hydroxyethyl starch in the attenuation of the injuries of ischemia and reperfusion of splanchnic organs

PURPOSE: Vogt´s antioxidant solution (red blood cells, Ringer's solution, sodium bicarbonate, mannitol, allopurinol and 50% glucose) or its modification including hydroxyethyl starch (HES) were tested for the prevention of splanchnic artery occlusion shock. METHODS: Seventy rats were distributed in treatment (3), control (1), and sham (3) groups. Ischemia and reperfusion were induced by celiac, superior mesenteric and inferior mesenteric arteries occlusion for 40 min, followed by 60 min reperfusion or sham procedures. Controls received saline, both treatment and sham groups received the Vogt's solution, modified Vogt's solution (replacing Ringer's solution by HES), or HES. Mean arterial blood pressure (MABP), ileal malondialdehyde (MDA) and plasmatic MDA were determined, and a histologic grading system was used. RESULTS: At reperfusion, MABP dropped in all I/R groups. Only HES treatment was able to restore final MABP to the levels of sham groups. Plasmatic MDA did not show differences between groups. Ileum MDA was significantly higher in the control and treatment groups as compared to the sham group. Histology ranking was higher in the only in control group. CONCLUSIONS: Hydroxyethyl starch was able to prevent hemodynamic shock but not intestinal lesions. Both treatments with Vogt's solutions did not show any improvement. .

Dehydration, hemodynamics and fluid volume optimization after induction of general anesthesia

OBJECTIVES: Fluid volume optimization guided by stroke volume measurements reduces complications of colorectal and high-risk surgeries. We studied whether dehydration or a strong hemodynamic response to general anesthesia increases the probability of fluid responsiveness before surgery begins. METHODS: Cardiac output, stroke volume, central venous pressure and arterial pressures were measured in 111 patients before general anesthesia (baseline), after induction and stepwise after three bolus infusions of 3 ml/kg of 6% hydroxyethyl starch 130/0.4 (n = 86) or Ringer's lactate (n = 25). A subgroup of 30 patients who received starch were preloaded with 500 ml of Ringer's lactate. Blood volume changes were estimated from the hemoglobin concentration and dehydration was estimated from evidence of renal water conservation in urine samples. RESULTS: Induction of anesthesia decreased the stroke volume to 62% of baseline (mean); administration of fluids restored this value to 84% (starch) and 68% (Ringer's). The optimized stroke volume index was clustered around 35-40 ml/m2/beat. Additional fluid boluses increased the stroke volume by ≥10% (a sign of fluid responsiveness) in patients with dehydration, as suggested by a low cardiac index and central venous pressure at baseline and by high urinary osmolality, creatinine concentration and ...

Effect of 6% Hydroxyethyl Starch 130/0.4 as a Priming Solution on Coagulation and Inflammation Following Complex Heart Surgery

PURPOSE: Prolonged duration of cardiopulmonary bypass aggravates the degree of inflammation and coagulopathy. We investigated the influence of 6% hydroxyethyl starch (HES) 130/0.4 on coagulation and inflammation compared with albumin when used for both cardiopulmonary bypass priming and perioperative fluid therapy in patients undergoing complex valvular heart surgery. MATERIALS AND METHODS: Fifty four patients were randomly allocated into albumin-HES, albumin-nonHES, and HES-HES groups. The cardiopulmonary bypass circuit was primed with 5% albumin in the albumin-HES and albumin-nonHES group, and with HES in the HES-HES group. As perioperative fluid, only plasmalyte was used in the albumin-nonHES group whereas HES was used up to 20 mL/kg in the albumin-HES and albumin-HES group. Serial assessments of coagulation profiles using the rotational thromboelastometry and inflammatory markers (tissue necrosis factor-alpha, interleukin-6, and interleukin-8) were performed. RESULTS: Patients' characteristics and the duration of cardiopulmonary bypass (albumin-HES; 137+/-34 min, HES-HES; 136+/-47 min, albumin-nonHES; 132+/-39 min) were all similar among the groups. Postoperative coagulation profiles demonstrated sporadic increases in clot formation time and coagulation time, without any differences in the actual amount of perioperative bleeding and transfusion requirements among the groups. Also, inflammatory markers showed significant activation after cardiopulmonary bypass without any differences among the groups. CONCLUSION: Even in the presence of prolonged duration of cardiopulmonary bypass, HES seemed to yield similar influence on the ensuing coagulopathy and inflammatory response when used for priming and perioperative fluid therapy following complex valvular heart surgery compared with conventional fluid regimen including albumin and plasmalyte.

The effect of 6% Hydroxyethyl starch vs. Ringer's lactate on acute kidney injury after renal ischemia in rats

PURPOSE: To compare fluid replacement therapy with Hydroxyethyl starch 6% (HES) versus Ringer's lactate (RL) in a rodent model of non-septic renal ischemia. METHODS: Forty male Wistar rats were randomized to receive HES 2 ml.kg-1.hr-1or RL 5 ml. kg-1.hr-1 that underwent 30 minutes of renal ischemia followed by reperfusion. Twelve hours after kidney ischemia, the kidneys were evaluated for histological changes. Serum NGAL levels were obtained at different times of the experimental protocol. RESULTS: Rodents in the HES group had a median (IQR) grade of renal injury 3 (3 to 5) compared to 2 (2 to 4) in the RL group (p=0.03). NGAL levels were not associated with the severity of kidney injury. CONCLUSION: Hydroxyethyl starch administration caused more kidney injury than Ringer's lactate in a non-infectious model of renal hypoperfusion.

The impact of 30 ml/kg hydroxyethyl starch 130/0.4 vs hydroxyethyl starch 130/0.42 on coagulation in patients undergoing abdominal surgery.

Background & objectives: Hydroxyethyl starches (HES) 130/0.4 (Voluven®) and 130/0.42 (Venofundin®) impair coagulation less than older HES solutions with higher molecular weight and molar substitution. Thus, these may be used in high doses up to 50 ml/kg/day. The aim of this study was to investigate and compare the effects of HES 130/0.4 versus HES 130/0.42 on coagulation after the intraoperative infusion of 30 ml/kg in patients undergoing major abdominal surgery. Methods: Fifty two patients scheduled for elective major abdominal surgery were randomized to receive 30 ml/kg of HES 130/0.4 or HES 130/0.42 intraoperatively. Coagulation variables were assessed before and after infusion of the colloid solution using thrombelastography. Results: Data from 49 patients, 25 patients in the HES 130/0.4 and 24 in the HES 130/0.42 group, were analyzed. Measurements of reaction time, kinetic time, α-angle, maximum amplitude and coagulation index before and after colloid infusion did not differ between the groups. Within each group, after colloid infusion, reaction time did not change significantly, while α-angle, maximum amplitude and coagulation index values were significantly decreased (P<0.01, P<0.001 and P<0.001, respectively in HES 130/0.4 group and P<0.01, P<0.001 and P<0.01, respectively in HES 130/0.42 group). Kinetic time was significantly increased (P<0.001) in both the groups. In both groups, all thrombelastographic measurements after colloid infusion were found within normal limits. Interpretation & conclusions: HES 130/0.4 and HES 130/0.42 showed similar, not clinically significant effects on coagulation, as assessed by thrombelastography, when a dose of 30 ml/kg was administered in patients undergoing major abdominal surgery.

Protective perioperative strategy using a third generation hydroxyethyl starch during surgery in a murine model of liver reperfusion injury / Estratégia protetora perioperatória usando um hidroxietilamido de terceira geração para expansão volêmica durante a cirurgia em modelo murino de lesão de reperfusão hepática

PURPOSE: To investigate whether a third generation colloid, hydroxyethyl starch (HES 130/0.4), used for perioperative fluid therapy, protects the rat liver against the late-phase response of ischemia/reperfusion injury (IRI) and if inhibition of neutrophil hepatic infiltration plays a part in this mechanism. METHODS: Wistar rats were used (8 in each group). Three groups had IRI induced by lobar vascular occlusion (60 minutes) and reperfusion (24 hours) and received HES (13 mL/kg iv), 7.5 percent saline (HS) (13 mL/kg iv) or no fluid. Three other groups were sham-operated and received the same fluid as the test groups. After 24 hours of reperfusion, blood was drawn for alanine aminotransferase (ALT) quantification and ischemic liver samples were taken for histological study (hematoxylin and eosin and chloroacetate staining of neutrophils). RESULTS: HES treatment attenuated the elevation in serum ALT (P=0.001) and reduced the extent of hepatocellular necrosis (P<0.01) compared with the IRI controls. HES-mediated cytoprotection was associated with a decrease of infiltration of neutrophils in the necrotic areas (P<0.05) compared with the untreated IRI rats, but not with the volume control IRI rats (P>0.05). CONCLUSION: Hydroxyethyl starch suppresses inflammatory response and ameliorates the late-phase response of hepatic ischemia/reperfusion injury.

OBJETIVO: Investigar se um colóide de terceira geração (HES 130/0.4), utilizado para fluidoterapia perioperatória, protege o fígado de rato contra a resposta da fase tardia de isquemia/reperfusão e se a inibição da infiltração hepática de neutrófilos desempenha um papel neste mecanismo. MÉTODOS: Foram utilizados ratos Wistar (8 em cada grupo). Três grupos tiveram lesão de isquemia/reperfusão (IRI) induzida por oclusão vascular lobar (60 minutos) e reperfusão (24 horas) e receberam HES (13 ml / kg iv), soro fisiológico a 7,5 por cento (HS) (13 ml / kg iv) ou nenhum fluido. Três outros grupos foram sham-operados e receberam o mesmo tipo de fluido dos grupos de teste. Após 24 horas de reperfusão, o sangue foi retirado para quantificação da alanina aminotransferase (ALT) e amostras de fígado isquêmico foram retiradas para estudo histológico (hematoxilina e eosina e coloração cloroacetato para neutrófilos). RESULTADOS: O tratamento com HES atenuou a elevação da ALT sérica (P = 0,001) e reduziu a extensão da necrose hepatocelular (P<0,01) em comparação com os controles da IRI. A citoproteção mediada por HES foi associada a uma diminuição da infiltração de neutrófilos nas áreas de necrose (P<0,05) em comparação com os ratos não tratados IRI, mas não com os ratos controlo IRI (P> 0,05). CONCLUSÃO: HES suprime a resposta inflamatória e melhora a resposta na fase tardia da isquemia/reperfusão hepática.

Hemodynamic effects of volume replacement with saline solution and hypertonic hydroxyethyl starch in dogs / Efeitos hemodinâmicos da reposição volêmica com solução salina e hidroxi-etil amido hipertônico em cães

PURPOSE: To investigate hemodynamic response to volume replacement with saline solution and hypertonic hydroxyethyl starch in hypovolemic dogs. METHODS: Forty dogs under general anesthesia and hemodynamic monitoring, following measurements at baseline, were bled 20 ml.Kg-1 and parameters were measured again after 10 minutes. The animals were randomly divided in two groups and volume replacement was performed with saline solution twice the volume removed or 4 ml.Kg-1 of hypertonic hydroxyethyl starch. Hemodynamic data were again measured after 5, 15, 30, 45 and 60 minutes. RESULTS: With both solutions values returned to satisfactory hemodynamic levels. With saline solution, there was a greater amplitude in variations that tended to decrease progressively. With hypertonic hydroxyethyl starch, the parameters studied returned more rapidly to levels similar to those at baseline and varied less. CONCLUSION: Both solutions proved to be efficient at replacing volume in the short period studied, although hypertonic hydroxyethyl starch produced more stable results.

OBJETIVO: Avaliar em cães hipovolêmicos as respostas hemodinâmicas da reposição volêmica com solução salina e hidroxi-etil amido hipertônico. MÉTODOS: Quarenta cães sob anestesia geral e monitorização hemodinâmica, após medidas em repouso foram sangrados 20 ml.Kg-1 e tiveram os parâmetros novamente medidos após 10 minutos. Os animais foram aleatoriamente divididos em dois grupos nos quais foi realizada reposição volêmica com solução fisiológica duas vezes o volume retirado ou 4 ml.Kg-1 de hidroxi-etil amido hipertônico e os dados hemodinâmicos medidos novamente após 5, 15, 30, 45 e 60 minutos. RESULTADOS: A reposição volêmica com as duas soluções fez os valores retornarem a níveis hemodinâmicos satisfatórios, a amplitude das variações com solução fisiológica foi maior, mas tendeu a diminuir progressivamente, com o hidroxi-etil amido hipertônico os parâmetros estudados retornaram a semelhantes ao repouso mais rapidamente e variaram menos. CONCLUSÃO: Ambas soluções se mostraram eficientes na reposição volêmica, o hidroxi-etil amido hipertônico proporcionou resultados mais estáveis.

Choice of colloidal solutions in dengue hemorrhagic fever patients.

BACKGROUND: DHF is characterized by plasma leakage and abnormal hemostasis. About 20% of DHF patients do require colloidal solution in addition to conventional crystalloid solution for the treatment. There is only one colloidal solution, 10% Dextran-40 in NSS that proved to be effective for this group of DHF patients. OBJECTIVE: To compare 10% dextran-40 in NSS with 10% Haes-steril in NSS in the management of DHF cases with severe plasma leakage for their effectiveness and impact on renal function, hemostasis, disease severity, and complications. MATERIAL AND METHOD: DHF patients admitted to Dengue Unit, QSNICH, who do not respond to conventional crystalloid solution, are randomly assigned to receive either dextran or haes-steril. Clinical and laboratory comparison are recorded and analyzed using SPSS for Window version 14.0. RESULTS: There are 104 DHF patients enrolled in the study; 57 are assigned in dextran and 47 in haes-steril group. The mean ages are 8.6 +/- 3.9 years. About half of the patients in both groups require one dose of colloidal solution and 25% require 2 and 3 doses (p = 0.138). The average amount of IV fluid infused in dextran and haes-steril group are 119.4 and 129.3 ml (p = 0.227). The average drop in Hct after the bolus dose of both colloid are 7.9 and 8.5% (p = 0.381). About 80% of the patients in each group have shock (p = 0.843). The mean elevation of AST are 598 and 822 U (p = 0.548) while ALT elevation are 182 and 306 U (p = 0.265) in dextran and haes-steril group, respectively. BUN and creatinine are within normal limits and are decreased after the use of colloidal solutions. The amount of urine on day 1, 2 and 3 after the use of both colloidal solutions are not different. Coagulogram studies (PT, PTT and TT) in both groups are not different. Patients with significant bleeding and who require blood transfusions are 15.8 and 19.2% in dextran and haes-steril group (p = 0.423).The incidence of fluid overload in dextran and haes-steril group are 35.1 and 40.4% (p = 0.360). Other complications are not different between dextran and haes-steril group as follows: hypocalcaemia, hyponatremia, hypokalemia and acidosis. The overall severity and complications in both groups of patients are much higher than in DHF patients who respond to conventional crystalloid solution. No allergic reaction was found after the use of both colloidal solutions. CONCLUSION: 10% Haes-steril is as effective as 10% dextran-40 in the treatment of DHF patients who have severe plasma leakage. There are no differences in DHF disease severity and complications in both groups but the disease severity and complications, especially fluid overload are observed to be more comparative with admitted DHF patients. Both colloidal solutions are safe in DHF patients with no allergic reaction observed and no interference in renal functions and hemostasis.

Avaliação hemodinâmica e metabólica da cetamina e cetamina S(+) após a reposição volêmica com hidroxietilamido 130/0,4 e solução salina hipertônica 7,5 por cento / Hemodynamic and metabolic evaluation of ketamine and S(+) ketamine after volemic expansion with hydroxyethyl starch 130/0.4 and hypertonic saline solution

O objetivo deste estudo foi avaliar os efeitos hemodinâmicos e metabólicos, após a administração de solução salina hipertônica (NaCL) 7,5 por cento ou em associação ao hidroxietilamido (HES), em cães com hipovolemia induzida e tratados com cetamina. Após a indução da hipovolemia, administrou-se NaCl 7,5 por cento (4,0ml kg-1) no grupo hipertônica levógira (GHL) e grupo hipertônica racêmica (GHR) ou HES 130/0,4 na mesma proporção de sangue retirado, associado a NaCl 7,5 por cento (4ml kg-1) no grupo hipertônica colóide levógira (GHCL) e no grupo hipertônica colóide racêmica (GHCR). Após 30 minutos, administrou-se, por via IV, cetamina levógira (CL) (5mg kg-1) no GHL e GHCL ou cetamina racêmica (CR) (10mg kg-1) no GHR e GHCR. Empregou-se a análise de variância de uma única via com repetições múltiplas (ANOVA) e o teste de Student Newman Keuls (P ≤ 0,05). A frequência cardíaca e a pressão arterial sistólica foram menores após a hipovolemia e após a CR. As pressões arteriais média e diastólica foram menores após a hipovolemia e cetamina. A pressão venosa central foi maior após a administração do colóide. Os índices cardíaco e sistólico foram menores após a hipovolemia em todos os grupos e, após a fase de expansão no GHL e GHR. A pressão média da artéria pulmonar foi menor após a hipovolemia em todos os grupos. A pressão de oclusão da artéria pulmonar foi maior após o colóide. O índice do trabalho ventricular esquerdo foi menor após a hipovolemia no GHCL e GHCR. O índice da resistência periférica total foi maior após a hipovolemia e menor após a CL. Observou-se acidose metabólica após a hipovolemia e após a cetamina. Ocorreu acidose respiratória após a cetamina no GHL e GHR. Conclui-se que a administração de NaCl 7,5 por cento associado ao HES 130/0,4 promove o restabelecimento imediato dos parâmetros hemodinâmicos e metabólicos no paciente hipovolêmico; a administração isolada de NaCl 7,5 por cento não é capaz...

The objective of this study was to evaluate the hemodynamics and hemogasometrics effects, after the administration of hypertonic solution (NaCl 7.5 percent) or in association with hidroxyethyl starch 130/0.4 (HES), in dogs with induced experimental hypovolemia and treated with racemic ketamine (RK) or S(+) ketamine (SK). After the hypovolemia induction, administration of NaCl 7.5 percent (4 ml kg-1) was performed in two groups called hypertonic S(+) group (HSG) and hypertonic racemic group (HRG), or NaCl 7.5 percent (4 ml kg-1) in association with HES, in the same ratio of removed blood, in two groups called hypertonic colloid S(+) group (HCSG) and hypertonic colloid racemic group (HCRG). After 30 minutes, it was administered by intravenous injection, SK (5tymg kg-1) in HSG and HCSG groups, or RK (10 mg kg-1) in HRG and HCRG groups. To evaluate the significance of the results, it was used One-way Analysis of variance (ANOVA) for repeated measures and Student Newman Keuls method (P ≤ 0.05). The heart rate and the systolic arterial pressure were reduced after hypovolemia and administration of the RK. Mean and diastolic arterial pressure were reduced after hypovolemia and either SK or RK administration. The central venous pressure was increased after administration of the colloid. The cardiac output, index cardiac, and index systolic were reduced after hypovolemia in all groups and, after phase of expansion in HSG and HRG. The pulmonary arterial occlusion pressure was increased after colloid administration. The left ventricular work index was reduced after hypovolemia in HCSG and HCRG. The systemic vascular resistance index was increased after hypovolemia and decreased after administration of the SK. The CO2 concentration to the end of the expiration increased after administration of ketamine in HCSG and HCRG. Metabolic acidosis was observed after hypovolemia and after administration of ketamine in all...

Two Cases of Systemic Capillary Leak Syndrome that were Treated with Pentastarch

Systemic capillary leak syndrome (SCLS) is a condition that's caused by the shift of fluid and protein from the intravascular space to the interstitial space as a result of repetitive episodes of capillary hyperpermeability. The pathogenesis of SCLS is still unclear, but there's recently been a report showing this syndrome in association with monoclonal gammopathy. This syndrome can be a fatal disease because cardiovascular collapse can occur in the initial capillary leak phase. Although theophylline, diuretics, terbutaline, steroids, calcium antagonist, Ginkgo biloba extracts and plasmapheresis have been suggested as medication, none of them have been proven to be effective. Considering that this disease is self-limiting, conservative treatment in the acute phase is believed to be very important. Because hypoalbuminemia is very a common manifestation of SCLS, Pentastarch, which has a higher molecular weight than albumin, could be efficient to prevent cardiovascular collapse. We used 10% Pentastarch during the acute SCLS attacks of 2 patients and the patients both showed a dramatic response. Pentastarch may be helpful to treat SCLS in its initial capillary leak phase by the elevating blood pressure, and this might contribute to somewhat decreasing the acute mortality of SCLS.

Uso das soluções de cloreto de sódio a 0, 9 por cento e 7, 5 por cento e hidroxietilamido no tratamento do choque induzido por toxina escorpiônica em ratos / The use of 0, 9 per cent and 7, 5 per cent sodium chloride solution and hydroetyl starch in treatment of shock induced by scorpion toxin in rats

O veneno bruto do Tityus serralatus, ou sua toxina purificada, é capaaz de levar à instabilidade dos sistemas fisiológicos, podendo ser fatal em crianças e idosos. O efeito hipertensivo da toxina é intenso, secundário à estimulação autonômica e liberação de catecolaminas. Após este período hipertensivo, geralmente se segue a hipotensão prolongada podendo evoluir para choque refratário, explicado, pelo menos em parte, por uma resposta inflamatória sistêmica que pode lever a falência múltipla orgânica e morte. A toxina pode levar à arritmias respiratórias, apnéia e respiração tipo 'gasp'. A reposição volêmica é fundamental no tratamento do choque. Quanto melhor a resposta pressórica secundária a infusão volêmica, pior foram as complicações pulmonares de edema / The Tityus serrulatus venon or its purified toxin, can cause instability of physiological systems, what can be the cause of death in children and ederly people. The scorpion venon cause hipertension that is secundary to autonomatic stimulation and release of catecolamines. After hipertensive period, generaly a prolonged hypotension come and could evalue to a refratary shock. At least, a part of this process can be explained by a systemic inflammatory response, that can cause multiple organ failure and death. The scorpion venon can lead to arrythmias, apnea and "gasping". Volemic replace is essencial to treat the shock. The better is the secundary response to blood pressure to volemic infusion, the worse is the pulmonary complication of oedema...

Hidroxietilalmidones: usos clínicos / Hidroxethylstarch

El choque circulatorio se caracteriza por perfusión tisular inadecuada lo cual resulta en disfunción celular con el consecuente metabolismo anaerobio, acidosis láctica y, de no ser tratado en forma temprana, muerte celular. La sobrevida de estos pacientes depende de compensar el gran déficit de oxigeno, optimizando la relación aporte consumo de oxígeno así como con el resto de variables cardiorespiratorias. Para lograr esto se requiere de repletar en forma adecuada el volumen circulante. La reanimación del paciente en estado de choque ha sido objeto de múltiples estudios y para lograrla se utilizan en la practica clínica: a)Cristaloides: Solución salina y Ringer lactado. b) Coloides: de origen humano (albúmina) o sintéticos (dextranes, gelatinas y hidroxietilalmidones destacan por sus características farmacológicas y clínicas, siendo un poco conocidos por la mayoría de los médicos

Manejo de líquidos en el shock traumático / Liquid management in traumatic shock

La injuria traumática puede alterar de muchas maneras la relación transporte de oxígeno/consumo de oxígeno, pudiendo conducir a una situación de shock. El uso de fluidos de reanimación intravenosa durante el tratamiento inicial puede restablecer la perfusión a nivel tisular, mejorando el transporte de oxígeno arterial. Luego de la evaluación inicial debe iniciarse la resucitación con la infusión de 2000 ml de soluciones cristaloides en el adulto, y/o de 20 ml/kg en el paciente pediátrico. En muchos casos debe adicionarse sangre y/o soluciones coloidales para mantener la hemodinamia. El cuidadoso monitoreo del paciente, incluso con la medición de PVC, PWCP, TAM, etc., permite brindarle la mejor opción de tratamiento.