Characteristics and outcomes of rapid response team activations for hypotension in orthopaedic patients.

BACKGROUND: Hypotension following orthopaedic surgery has been associated with increased morbidity and mortality. Rapid response teams (RRT) review patients on hospital wards with hypotension. AIM: To evaluate the epidemiology of hypotensive RRT activations in adult orthopaedic patients to identify contributing factors and areas for future quality improvement. METHODS: Timing of RRT activations, presumed causes of hypotension and associated treatments were assessed. RESULTS: Among 963 RRT activations in 605 patients over 3 years, the first calls of 226 of 605 patients were due to hypotension, and 213 (94.2%) of 226 had sufficient data for analysis. The median age was 79 (interquartile range 66-87) years; 58 (27.2%) were male, and comorbidities were common. Most (68%) surgery was emergent, and 75.1% received intraoperative vasopressors for hypotension. Most activations occurred within 24 h of surgery, and hypovolaemia, infection and arrhythmias were common presumed causes. Fluid boluses occurred in 173 (81.2%), and the time between surgery and RRT activation was 10 (4.0-26.5) h. in cases where fluid boluses were given, compared with 33 (15.5-61.5) h. where they were not (P < 0.001). Blood transfusion (30, 14.1%) and withholding of medications were also common. Hospital mortality was 8.5% (18), and 13.6% (29) were admitted to critical care at some stage. In-hospital death was associated with older age, functional dependence, arrhythmia and presumed infection. CONCLUSIONS: Hypotension-related RRT calls in orthopaedic patients are common. Future interventional studies might focus on perioperative fluid therapy and vaso-active medications, as well as withholding of anti-hypertensive medications preoperatively.

A Randomized Controlled Study of Low-Dose Hydrocortisone Versus Placebo in Dopamine-Treated Hypotensive Neonates Undergoing Hypothermia Treatment for Hypoxic-Ischemic Encephalopathy.

OBJECTIVE: To investigate whether hydrocortisone supplementation increases blood pressure and decreases inotrope requirements compared with placebo in cooled, asphyxiated neonates with volume-resistant hypotension. STUDY DESIGN: A double-blind, randomized, placebo-controlled clinical trial was conducted in a Level III neonatal intensive care unit in 2016-2017. Thirty-five asphyxiated neonates with volume-resistant hypotension (defined as a mean arterial pressure [MAP] < gestational age in weeks) were randomly assigned to receive 0.5 mg/kg/6 hours of hydrocortisone or placebo in addition to standard dopamine treatment during hypothermia. RESULTS: More patients reached the target of at least 5-mm Hg increment of MAP in 2 hours after randomization in the hydrocortisone group, compared with the placebo group (94% vs 58%, P = .02, intention-to-treat analysis). The duration of cardiovascular support (P = .001) as well as cumulative (P < .001) and peak inotrope dosage (P < .001) were lower in the hydrocortisone group. In a per-protocol analysis, regression modeling predicted that a 4-mm Hg increase in MAP in response to hydrocortisone treatment was comparable with the effect of 15 µg/kg/min of dopamine in this patient population. Serum cortisol concentrations were low before randomization in both the hydrocortisone and placebo groups (median 3.5 and 3.3 µg/dL, P = .87; respectively), suggesting inappropriate adrenal function. Short-term clinical outcomes were similar in the 2 groups. CONCLUSIONS: Hydrocortisone administration was effective in raising the blood pressure and decreasing inotrope requirement in asphyxiated neonates with volume-resistant hypotension during hypothermia treatment. TRIAL REGISTRATION: ClinicalTrials.gov: NCT02700828.

Descrição da prática do uso da vasopressina em recém-nascidos internados em uti neonatal / Description of the use of vasopressin in newborns admitted to a neonatal intensive care unit

A hipotensão arterial sistêmica é uma complicação comum na UTI neonatal e quando é refratária ao tratamento inicial com volume (nos casos de hipovolemia), catecolaminas ou corticosteróides tem taxa de mortalidade alta. A vasopressina se apresenta como tratamento a essa situação de hipotensão refratária. Este trabalho objetivou descrever a prática de utilização da vasopressina no tratamento de hipotensão refratária ao uso de aminas vasoativas em recém-nascidos internados em uma UTI neonatal.Foi realizado um estudo retrospectivo, com a coleta de dados dos prontuários dos recém-nascidos que fizeram uso dessa medicação dejaneiro de 2012 até janeiro 2018. Como resultado, foram analisados 80 prontuários, 64 de pacientes prematuros, 14 pacientes a termo e 2 pós-termo, com peso médio geral de 1375g. Foi encontrada uma associação estatística significativa entre sobrevida e o tempo de uso da vasopressina por menos do que 1 semana, aumento de no mínimo 30% da pressão arterial média nas primeiras 6 horas após o início da vasopressina e ausência de anúria ao se iniciar a vasopressina.

Systemic arterial hypotension is a common complication in the neonatal ICU and when it is refractory to initial treatment with volume (in cases of hypovolemia), catecholamines or corticosteroids have a high mortality rate. Vasopressin presents as a treatment for this situation of refractory hypotension. This study aimed to describe the use of vasopressin in the treatment of refractory hypotension to the vasoactive amines in neonates admitted in a neonatal intensive care unit. We retrospectivelyanalysed data from newborns that used this medication from January 2012 until January 2018. 80 charts were analyzed, (64 of preterm, 14 full-term and 2 post-term patients) with mean weight of 1375g. A statistically significant association was found between survival and duration of use of vasopressin for less than 1 week, increase of at least 30% of mean arterial pressure within the first 6 hours after vasopressin onset and absence of anuria upon initiation of vasopressin.

Culture-Negative Septic Shock Compared With Culture-Positive Septic Shock: A Retrospective Cohort Study.

OBJECTIVES: To determine the clinical characteristics and outcomes of culture-negative septic shock in comparison with culture-positive septic shock. DESIGN: Retrospective nested cohort study. SETTING: ICUs of 28 academic and community hospitals in three countries between 1997 and 2010. SUBJECTS: Patients with culture-negative septic shock and culture-positive septic shock derived from a trinational (n = 8,670) database of patients with septic shock. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Patients with culture-negative septic shock (n = 2,651; 30.6%) and culture-positive septic shock (n = 6,019; 69.4%) were identified. Culture-negative septic shock compared with culture-positive septic shock patients experienced similar ICU survival (58.3% vs 59.5%; p = 0.276) and overall hospital survival (47.3% vs 47.1%; p = 0.976). Severity of illness was similar between culture-negative septic shock and culture-positive septic shock groups ([mean and SD Acute Physiology and Chronic Health Evaluation II, 25.7 ± 8.3 vs 25.7 ± 8.1]; p = 0.723) as were serum lactate levels (3.0 [interquartile range, 1.7-6.1] vs 3.2 mmol/L [interquartile range, 1.8-5.9 mmol/L]; p = 0.366). As delays in the administration of appropriate antimicrobial therapy after the onset of hypotension increased, patients in both groups experienced congruent increases in overall hospital mortality: culture-negative septic shock (odds ratio, 1.56; 95% CI [1.47-1.66]; p < 0.0001) and culture-positive septic shock (odds ratio, 1.65; 95% CI [1.59-1.71]; p < 0.0001). CONCLUSIONS: Patients with culture-negative septic shock behave similarly to those with culture-positive septic shock in nearly all respects; early appropriate antimicrobial therapy appears to improve mortality. Early recognition and eradication of infection is the most obvious effective strategy to improve hospital survival.

Chá Verde Atenua a Hipotensão Induzida por Exercício: Um Estudo Randomizado, Placebo-Controlado / Green Tea Attenuates Hypotension Induced by Physical Exercise: A Randomized, Placebo Controlled Study

Fundamentos: Estudos mostram que a administração crônica de chá verde reduz a pressão arterial (PA) de repouso, enquanto que uma única sessão de exercício também promove redução da PA. Objetivo: Investigar se uma única dose de chá verde antes da sessão de exercício melhora a hipotensão pós exercício (HPE). Métodos: Estudo randomizado, placebo-controlado, duplo cego. Quinze pacientes hipertensos (53 ± 3,3 anos) participaram de duas sessões: chá verde + exercício (CVE) e placebo + exercício (PLE). Trinta minutos após ingestão de 2 g de chá verde ou placebo, os pacientes realizaram 60 minutos de caminhada na esteira a 60-85% da frequência cardíaca máxima. A PA foi medida em repouso e a cada 10 minutos após o exercício por 60 minutos. As amostras de sangue foram colhidas antes da ingestão do chá verde ou placebo e imediatamente após o exercício para determinar as concentrações de malondialdeído (MDA) e nitrito (NO). Resultados: No dia PLE, a HPE foi detectada em todos os tempos pós-exercício (redução na PA de 6,5 a 11,8 mmHg), enquanto que no dia CVE, HPE ocorreu somente aos 20 e 40 minutos pós-exercício, respectivamente. A redução na pressão sanguínea foi significativamente maior no PLE aos 10, 20 e 30 minutos pós-exercício em comparação a CVE. Além disso, CVE causou uma resposta diastólica hipertensiva, enquanto no dia PLE, a HPE diastólica foi observada somente aos 20 minutos pós-exercício. Não foram observadas mudanças nas concentrações de MDA ou NO em resposta ao exercício. Conclusão: A suplementação com chá verde anterior a uma sessão de exercício aeróbico atenuou a HPE sistólica e induziu uma resposta hipertensiva ao exercício aeróbico em pacientes hipertensos

Background: Studies have shown that chronic administration of green tea decreases blood pressure (BP) at rest, while a single exercise session also promotes reduction of BP. Objective: To investigate whether if a single dose of green tea prior to aerobic exercise session improves post-exercise hypotension (PEH). Methods: Randomized, double-blind, placebo controlled study. Fifteen hypertensive patients (53 ± 3.3 years) participated in two study sessions: green tea+exercise (GTE) and placebo+exercise (PLE). Thirty minutes after ingesting 2g of green tea or placebo, they performed 60 minutes of treadmill walking at 60 to 85% of maximum heart rate. BP was measured at rest and at every 10 minutes after exercise for 60 minutes. Blood samples were taken before ingestion of green tea or placebo and immediately after exercise to determine malondialdehyde (MDA) and nitrite (NO) concentrations. Results: On PLE day, systolic PEH was detected at all post-exercise time points (BP reduction by 6.5-11.8 mmHg), whereas on GTE day, PEH was found only at 20 and 40 minutes post-exercise (BP reduction by 5.9 and 5.8 mmHg, respectively). BP reduction was significantly higher in PLE at 10, 20 and 30 minutes post-exercise compared with GTE. In addition, GTE resulted in hypertensive diastolic response, while on PLE day, diastolic PEH was seen only at 20 minutes post-exercise. No changes in MDA or NO concentrations in response to exercise were observed. Conclusion: Green tea supplementation prior to an aerobic exercise session attenuated systolic PEH and induced diastolic hypertensive response to aerobic exercise in hypertensive patients

Hipotensão arterial em cães e gatos – revisão / Arterial hypotension in dogs and cats - a review / Hipotensión arterial en perros y gatos - revisión

A hipotensão arterial é intercorrência frequente na rotina clínica e cirúrgica de pequenos animais, provocando graves consequências, como injúria renal aguda ou mesmo disfunção de múltiplos órgãos. Entender a fisiopatologia e conhecer as opções diagnósticas e terapêuticas dessa intercorrência são condições fundamentais para uma correta abordagem nesses casos. O objetivo deste estudo foi revisar a fisiopatologia da hipotensão arterial, mas principalmente descrever os principais métodos de diagnóstico e as recentes diretrizes de seu tratamento. A atual terapia guiada por metas direciona o profissional para o entendimento da necessidade de uma ação terapêutica precoce a partir do diagnóstico da hipotensão. Dessa forma, por meio de um rápido restabelecimento da pressão arterial, espera-se reduzir ou mesmo prevenir sequelas dessa síndrome clínica potencialmente fatal.

Hypotension is an usual event in small animals clinics, which can impact severely the clinical outcome of patients by causing acute kidney injury or multiple organ failure. It is fundamental to understand the physiopathology of this condition and to know the main diagnosis and therapeutic options to deal correctly with such cases. Therefore, the aim of this study was to briefly review the physiopathology of hypotension and to describe the main diagnostic methods, as well as the most recent treatment guidelines. The current goal-based therapy helps the professional to understand the need for an early therapeutic action as soon hypotension is diagnosed. Thus, one expects to decrease or even prevent major sequelae through a rapid return to normal blood pressure in this potentially fatal clinical syndrome.

La hipotensión es una complicación frecuente en la clínica y cirugía de pequeños animales que tiene consecuencias graves como la insuficiencia renal aguda o la falia de múltiples órganos. La comprensión de la fisiopatología y el reconocimiento de las opciones diagnósticas y terapêuticas de esta complicación son fundamentales para el correcto manejo de estos casos. EI objetivo de este trabajo fue revisar la literatura relacionada con la fisiopatología de la hipotensión arterial, describiendo, principalmente, los métodos más importantes para su diagnóstico, y las directrices recientes en cuanto al tratamiento. La terapêutica actual a través de metas guía al profesional en la comprensión de la necesidad de una acción terapêutica precoz a partir dei diagnóstico de la hipotensión. De esa forma, a través de uma recuperación rápida de la presión arterial, se espera reducir o prevenir las posibles secuelas de este síndrome clínico potencialmente fatal.

Hipotensão arterial em cães e gatos revisão / Arterial hypotension in dogs and cats - a review / Hipotensión arterial en perros y gatos - revisión

A hipotensão arterial é intercorrência frequente na rotina clínica e cirúrgica de pequenos animais, provocando graves consequências, como injúria renal aguda ou mesmo disfunção de múltiplos órgãos. Entender a fisiopatologia e conhecer as opções diagnósticas e terapêuticas dessa intercorrência são condições fundamentais para uma correta abordagem nesses casos. O objetivo deste estudo foi revisar a fisiopatologia da hipotensão arterial, mas principalmente descrever os principais métodos de diagnóstico e as recentes diretrizes de seu tratamento. A atual terapia guiada por metas direciona o profissional para o entendimento da necessidade de uma ação terapêutica precoce a partir do diagnóstico da hipotensão. Dessa forma, por meio de um rápido restabelecimento da pressão arterial, espera-se reduzir ou mesmo prevenir sequelas dessa síndrome clínica potencialmente fatal.(AU)

Hypotension is an usual event in small animals clinics, which can impact severely the clinical outcome of patients by causing acute kidney injury or multiple organ failure. It is fundamental to understand the physiopathology of this condition and to know the main diagnosis and therapeutic options to deal correctly with such cases. Therefore, the aim of this study was to briefly review the physiopathology of hypotension and to describe the main diagnostic methods, as well as the most recent treatment guidelines. The current goal-based therapy helps the professional to understand the need for an early therapeutic action as soon hypotension is diagnosed. Thus, one expects to decrease or even prevent major sequelae through a rapid return to normal blood pressure in this potentially fatal clinical syndrome.(AU)

La hipotensión es una complicación frecuente en la clínica y cirugía de pequeños animales que tiene consecuencias graves como la insuficiencia renal aguda o la falia de múltiples órganos. La comprensión de la fisiopatología y el reconocimiento de las opciones diagnósticas y terapêuticas de esta complicación son fundamentales para el correcto manejo de estos casos. EI objetivo de este trabajo fue revisar la literatura relacionada con la fisiopatología de la hipotensión arterial, describiendo, principalmente, los métodos más importantes para su diagnóstico, y las directrices recientes en cuanto al tratamiento. La terapêutica actual a través de metas guía al profesional en la comprensión de la necesidad de una acción terapêutica precoz a partir dei diagnóstico de la hipotensión. De esa forma, a través de uma recuperación rápida de la presión arterial, se espera reducir o prevenir las posibles secuelas de este síndrome clínico potencialmente fatal.(AU)

Conduct protocol in emergency: Acute adrenal insufficiency.

INTRODUCTION:: Acute adrenal insufficiency or addisonian crisis is a rare comorbidity in emergency; however, if not properly diagnosed and treated, it may progress unfavorably. OBJECTIVE:: To alert all health professionals about the diagnosis and correct treatment of this complication. METHOD:: We performed an extensive search of the medical literature using specific search tools, retrieving 20 articles on the topic. RESULTS:: Addisonian crisis is a difficult diagnosis due to the unspecificity of its signs and symptoms. Nevertheless, it can be suspected in patients who enter the emergency room with complaints of abdominal pain, hypotension unresponsive to volume or vasopressor agents, clouding, and torpor. This situation may be associated with symptoms suggestive of chronic adrenal insufficiency such as hyperpigmentation, salt craving, and association with autoimmune diseases such as vitiligo and Hashimoto's thyroiditis. Hemodynamically stable patients may undergo more accurate diagnostic methods to confirm or rule out addisonian crisis. Delay to perform diagnostic tests should be avoided, in any circumstances, and unstable patients should be immediately medicated with intravenous glucocorticoid, even before confirmatory tests. CONCLUSION:: Acute adrenal insufficiency is a severe disease that is difficult to diagnose. It should be part of the differential diagnosis in cases of hypotensive patient who is unresponsive to vasoactive agents. Therefore, whenever this complication is considered, health professionals should aim specifically at this pathology.

Conduct protocol in emergency: Acute adrenal insufficiency / Protocolo de condutas em emergência: insuficiência adrenal aguda

Summary Introduction: Acute adrenal insufficiency or addisonian crisis is a rare comorbidity in emergency; however, if not properly diagnosed and treated, it may progress unfavorably. Objective: To alert all health professionals about the diagnosis and correct treatment of this complication. Method: We performed an extensive search of the medical literature using specific search tools, retrieving 20 articles on the topic. Results: Addisonian crisis is a difficult diagnosis due to the unspecificity of its signs and symptoms. Nevertheless, it can be suspected in patients who enter the emergency room with complaints of abdominal pain, hypotension unresponsive to volume or vasopressor agents, clouding, and torpor. This situation may be associated with symptoms suggestive of chronic adrenal insufficiency such as hyperpigmentation, salt craving, and association with autoimmune diseases such as vitiligo and Hashimoto's thyroiditis. Hemodynamically stable patients may undergo more accurate diagnostic methods to confirm or rule out addisonian crisis. Delay to perform diagnostic tests should be avoided, in any circumstances, and unstable patients should be immediately medicated with intravenous glucocorticoid, even before confirmatory tests. Conclusion: Acute adrenal insufficiency is a severe disease that is difficult to diagnose. It should be part of the differential diagnosis in cases of hypotensive patient who is unresponsive to vasoactive agents. Therefore, whenever this complication is considered, health professionals should aim specifically at this pathology.

Resumo Introdução: a insuficiência adrenal aguda ou crise addisoniana é uma comorbidade rara na emergência; porém, se não diagnosticada e tratada de forma correta, pode evoluir de maneira desfavorável. Objetivo: alertar a todos os profissionais da saúde sobre o diagnóstico e tratamento corretos dessa complicação. Método: foi realizada uma ampla pesquisa na literatura médica, por meio de ferramentas específicas, sendo selecionados 20 artigos sobre o tema. Resultados: a crise addisoniana é de difícil diagnóstico pela inespecificidade de seus sinais e sintomas. No entanto, pode ser suspeitada em pacientes que chegam à emergência com queixa de dor abdominal, hipotensão não responsiva a volume ou a agentes vasopressores, obnubilação e torpor. Esse quadro pode vir associado a sintomas sugestivos de insuficiência adrenal crônica, como hiperpigmentação e avidez por sal, bem como a doenças autoimunes, como vitiligo e tireoidite de Hashimoto. Pacientes estáveis hemodinamicamente podem passar por métodos diagnósticos mais apurados para se confirmar ou descartar a crise addisoniana. Os exames diagnósticos não podem retardar, em hipótese alguma, o tratamento de pacientes instáveis, que deve ser iniciado imediatamente com glicocorticoide endovenoso, inclusive antes das provas confirmatórias. Conclusão: a insuficiência adrenal aguda é uma patologia grave e de difícil diagnóstico, que deve fazer parte do diagnóstico diferencial do médico ao atender um paciente hipotenso sem reposta à infusão de drogas vasoativas. Logo, na suspeita dessa complicação, o profissional não deve tardar a agir especificamente nessa patologia.

Conservative treatment of Angle Class III malocclusion with anterior crossbite

Angle Class III malocclusion is characterized by anteroposterior dental discrepancy which might be associated or not with skeletal changes. Class III molar relationship is associated with vertical or lingually tipped mandibular incisors and a usually concave profile. These characteristics seriously affect facial esthetics and most frequently are the reason why patients seek orthodontic treatment. This case was presented to the committee of the Brazilian Board of Orthodontics and Facial Orthopedics (BBO) as part of the requisites to become a BBO Diplomate.

A má oclusão de Classe III de Angle é caracterizada por uma discrepância dentária anteroposterior, que pode ou não estar acompanhada por alterações esqueléticas. Observa-se uma relação molar de Classe III associada ao posicionamento vertical ou retroinclinado dos incisivos inferiores e, geralmente, perfil facial côncavo. Esse aspecto gera grande comprometimento estético na face, sendo justamente esse o fator que, na maioria das vezes, motiva o paciente a procurar pelo tratamento ortodôntico. O presente caso clínico foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO) como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.

Acute hemodynamic decompensation during catheter ablation of scar-related ventricular tachycardia: incidence, predictors, and impact on mortality.

BACKGROUND: The occurrence of periprocedural acute hemodynamic decompensation (AHD) in patients undergoing radiofrequency catheter ablation of scar-related ventricular tachycardia (VT) has not been previously investigated. METHODS AND RESULTS: We identified univariate predictors of periprocedural AHD in 193 consecutive patients undergoing radiofrequency catheter ablation of scar-related VT. AHD was defined as persistent hypotension despite vasopressors and requiring mechanical support or procedure discontinuation. AHD occurred in 22 (11%) patients. Compared with the rest of the population, patients with AHD were older (68.5±10.7 versus 61.6±15.0 years; P=0.037); had a higher prevalence of diabetes mellitus (36% versus 18%; P=0.045), ischemic cardiomyopathy (86% versus 52%; P=0.002), chronic obstructive pulmonary disease (41% versus 13%; P=0.001), and VT storm (77% versus 43%; P=0.002); had more severe heart failure (New York Heart Association class III/IV: 55% versus 15%, P<0.001; left ventricular ejection fraction: 26±10% versus 36±16%, P=0.003); and more often received periprocedural general anesthesia (59% versus 29%; P=0.004). At 21±7 months follow-up, the mortality rate was higher in the AHD group compared with the rest of the population (50% versus 11%, log-rank P<0.001). CONCLUSIONS: AHD occurs in 11% of patients undergoing radiofrequency catheter ablation of scar-related VT and is associated with increased risk of mortality over follow-up. AHD may be predicted by clinical factors, including advanced age, ischemic cardiomyopathy, more severe heart failure status (New York Heart Association class III/IV, lower ejection fraction), associated comorbidities (diabetes mellitus and chronic obstructive pulmonary disease), presentation with VT storm, and use of general anesthesia.

Eletroacupuntura para tratamento de hipotensão induzida por isofluorano em cavalos / Electroacupuncture treatment for isoflurane induced hypotension in horses

Objetivou-se avaliar a eficiência do tratamento da hipotensão arterial com eletroacupuntura comparativamente à dobutamina em equinos. Foram avaliados seis cavalos adultos, saudáveis, mantidos em anestesia inalatória, com isofluorano, em ventilação mecânica. Após a estabilização da anestesia, foi induzida hipotensão arterial, através do incremento da concentração do isofluorano, iniciando-se um dos tratamentos: DOB: dobutamina (1,5µg kg-1 min-1, infusão contínua intravenosa); EA: estímulo elétrico no acuponto pericárdio 6 (PC6), bilateralmente; SHAM: estímulo elétrico em ponto falso de acupuntura. Foram mensurados: frequência cardíaca (FC), pressão arterial média (PAM), temperatura retal (T), concentração final expirada de isofluorano (ETiso), variáveis hemogasométricas, concentração sérica de aspartato aminotransferase (AST) e creatina fosfoquinase (CK), tempo e qualidade da recuperação pós-anestésica. Houve incremento na PAM de 50%, 36,6% e 7,5% nos tratamentos DOB, EA e SHAM, respectivamente. Não houve diferença entre os grupos nas variáveis hemogasométricas, FC, T, ETiso, CK, AST, tempo e qualidade de recuperação pós-anestésica. Conclui-se que o tratamento com dobutamina foi mais efetivo para o tratamento da hipotensão em cavalos sob anestesia inalatória quando comparado ao estímulo elétrico do acuponto PC6 ou ponto falso de acupuntura...

This study aimed to evaluate the efficacy of electroacupuncture compared to the dobutamine treatment of hypotension in equines. Six adult horses were maintained in isoflurane anesthesia with mechanical ventilation. After anesthesia was established, the isoflurane concentration was raised until hypotension was achieved. After that the animals were treated with a constant rate of 1.5mg kg -1min-1 intravenous dobutamine (DOB), electroacupunture to pericardium 6 (PC-6) acupoint (EA) and false point treatment (SHAM). Heart rate (HH), median arterial blood pressure (MAP), rectal temperature (T), isoflurane end-tidal concentration, arterial blood gases, creatine kinase (CK), aspartate transaminase (AST), recovery time and quality of recovery were investigated. The MAP increased 50%, 36.5% and 7.5%% in DOB, EA and SHAM treatments, respectively. HH, T, arterial blood gases, CK, AST, recovery time and quality of recovery did not differ among treatments. It was concluded that the dobutamine treatment was more effective than EA and SHAM treatments for the reversion of isoflurane induced hypotension in horses...

Eletroacupuntura para tratamento de hipotensão induzida por isofluorano em cavalos / Electroacupuncture treatment for isoflurane induced hypotension in horses

Objetivou-se avaliar a eficiência do tratamento da hipotensão arterial com eletroacupuntura comparativamente à dobutamina em equinos. Foram avaliados seis cavalos adultos, saudáveis, mantidos em anestesia inalatória, com isofluorano, em ventilação mecânica. Após a estabilização da anestesia, foi induzida hipotensão arterial, através do incremento da concentração do isofluorano, iniciando-se um dos tratamentos: DOB: dobutamina (1,5µg kg-1 min-1, infusão contínua intravenosa); EA: estímulo elétrico no acuponto pericárdio 6 (PC6), bilateralmente; SHAM: estímulo elétrico em ponto falso de acupuntura. Foram mensurados: frequência cardíaca (FC), pressão arterial média (PAM), temperatura retal (T), concentração final expirada de isofluorano (ETiso), variáveis hemogasométricas, concentração sérica de aspartato aminotransferase (AST) e creatina fosfoquinase (CK), tempo e qualidade da recuperação pós-anestésica. Houve incremento na PAM de 50%, 36,6% e 7,5% nos tratamentos DOB, EA e SHAM, respectivamente. Não houve diferença entre os grupos nas variáveis hemogasométricas, FC, T, ETiso, CK, AST, tempo e qualidade de recuperação pós-anestésica. Conclui-se que o tratamento com dobutamina foi mais efetivo para o tratamento da hipotensão em cavalos sob anestesia inalatória quando comparado ao estímulo elétrico do acuponto PC6 ou ponto falso de acupuntura.(AU)

This study aimed to evaluate the efficacy of electroacupuncture compared to the dobutamine treatment of hypotension in equines. Six adult horses were maintained in isoflurane anesthesia with mechanical ventilation. After anesthesia was established, the isoflurane concentration was raised until hypotension was achieved. After that the animals were treated with a constant rate of 1.5mg kg -1min-1 intravenous dobutamine (DOB), electroacupunture to pericardium 6 (PC-6) acupoint (EA) and false point treatment (SHAM). Heart rate (HH), median arterial blood pressure (MAP), rectal temperature (T), isoflurane end-tidal concentration, arterial blood gases, creatine kinase (CK), aspartate transaminase (AST), recovery time and quality of recovery were investigated. The MAP increased 50%, 36.5% and 7.5%% in DOB, EA and SHAM treatments, respectively. HH, T, arterial blood gases, CK, AST, recovery time and quality of recovery did not differ among treatments. It was concluded that the dobutamine treatment was more effective than EA and SHAM treatments for the reversion of isoflurane induced hypotension in horses.(AU)

Actualización del bundle de reanimación inicial y monitorización integral de la perfusión tisular en la sepsis severa / Initial resuscitation bundle and monitoring tissue perfusion in severe sepsis

Sepsis is a global health problem. Despite recent advances in understanding its pathophysiology and clinical trials testing potential new therapies, mortality remains unacceptably high. In fact, sepsis is the leading cause of death in non-coronary intensive care units around the world. However, during the past decade, some studies have highlighted that early recognition of sepsis and an appropriate initial approach are fundamental determinants of prognosis. A systematic approach to the harmful triad of sepsis-related hypotension, tissue hypoperfusion and organ dysfunction, with low-cost, easy to implement, and effective interventions, can significantly improve the chances of survival. In this article, we will update the evidence supporting the initial resuscitation bundle for patients with severe sepsis, and discuss the physiological basis for perfusion monitoring during septic shock resuscitation.

[Initial resuscitation bundle and monitoring tissue perfusion in severe sepsis]. / Actualización del bundle de reanimación inicial y monitorización integral de la perfusión tisular en la sepsis severa.

Sepsis is a global health problem. Despite recent advances in understanding its pathophysiology and clinical trials testing potential new therapies, mortality remains unacceptably high. In fact, sepsis is the leading cause of death in non-coronary intensive care units around the world. However, during the past decade, some studies have highlighted that early recognition of sepsis and an appropriate initial approach are fundamental determinants of prognosis. A systematic approach to the harmful triad of sepsis-related hypotension, tissue hypoperfusion and organ dysfunction, with low-cost, easy to implement, and effective interventions, can significantly improve the chances of survival. In this article, we will update the evidence supporting the initial resuscitation bundle for patients with severe sepsis, and discuss the physiological basis for perfusion monitoring during septic shock resuscitation.

Manejo da hipotensão após raquianestesia em cesarianas / Management of hypotension after rachianestesia in cesarean sections

A hipotensão materna após raquianestesia em cesarianas é um evento extremamente frequente na prática anestésica em sala de parto. O manejo com vasopressores é a melhor conduta diante do quadro, sendo o uso da fenilefrina o mais seguro e eficaz. A resposta ao tratamento é mais bem avaliada através de parâmetros clínicos não-invasivos.

Maternal hypotension after spinal anesthesia for cesarian sections is an extremely common event in anesthesia delivery room. The treatment with vasopressors is the better behavior in the case, with the use of phenylephrine as safe and effective. The response to treatment is best assessed by non-invasive clinical parameters.

How should we manage adverse intradialytic blood pressure changes?

Variations in intradialytic blood pressure (BP) are a common and predictable occurrence in ESRD patients. These are caused by a decrease in blood volume provoked by ultrafiltration, lack of normal compensatory responses to fluid removal, underlying cardiac disease, and electrolyte changes that may adversely affect cardiovascular function. Intradialytic hypotension is the most frequent complication of the hemodialysis (HD) procedure and is fundamentally a consequence of an ultrafiltration rate that surpasses mechanisms activated to avert a decline in BP. Intradialytic hypertension is a less well-understood problem that has been recently associated with increased mortality. Fundamental patient characteristics and components of the HD procedure are involved in the pathophysiology of intradialytic hypotension and intradialytic hypertension. Correction of patient factors, modulation of HD prescription, and management of pharmacologic agents are the strategies to deal with adverse intradialytic BP changes.

Eficacia comparativa de la atropina, dosis distintas, en el control de bradicardia e hipotensión durante la anestesia. 2008-2009 / Comparative efficacy of atropine, different doses, in the control of bradycardia e hipotension during anesthesia. 2008-2009

Objetivo: Determinar si el uso de atropina pre-medicada a dosis de 0,005 mg/kg, es más eficaz en el control de Frecuencia Cardiaca (FC) y Presión Arterial Media (PAM), que el uso a dosis de 0,01 mg/kg, durante la anestesia. Material y métodos: Se realizó estudio experimental, tipo ensayo clínico controlado, ciego, con asignación aleatoria. Se incluyeron 260 pacientes entre 18 y 85 años, divididos en dos grupos comparables en edad, riesgo anestésico y distintas técnicas anestésicas, grupo 1(n=130) estudio y grupo 2 (n=130) control. Resultados: La edad media estudiada fue 48,91 ±19,18 años. La FC media basal en grupo estudio fue 84,02±17.13 latidos/minuto y control 74,73± 13,27 latidos/minuto (p<0.05); después de atropina, 84.36 ±20.2 y 77.42 ±11.3 latidos/minuto respectivamente, (p<0.05).El análisis del comportamiento de FC y PAM intraoperatoria Grupo estudio: 9 pacientes (6,92%) bradicardia (< de 60 latidos /minuto) y PAM normal, 8 (6,15%) taquicardia y PAM normal y en 113 (86,92 %) la PAM y la FC normales. Control: 2 (1. 53%) bradicardia e hipotensión, 1 (0,76%) taquicardia y PAM normal y 127 (97,69%) frecuencia cardiaca y PAM normales. Se encontró correlación Pearson entre dosis atropina y FC intra-operatoria, inversa -0,104 y significación 0,095. P> 0,01n.s. dosis y PAM valor 0,217 y significación 0,000. (p<0.01). Conclusión: La administración de una dosis terapéutica de atropina 0,01 mg/kg, y 0,005 mg/kg mantiene la FC y PAM intra-operatoria dentro de rangos de normalidad en pacientes ASA I y ASA II, para anestesia quirúrgica según resultados. (AU)

Objective: To determine if the use of atropine pre-medicated at dose of 0.005 mg/kg, is more effective in the control of cardiac frequency and blood pressure, that the use at doses of 0.01 mg/kg during anesthesia. Material and methods: It was realized a experimental, type clinical test controlled, blind, with random assignment . 260 Patients were included between 18 to 85 years, divided into two groups were comparable inage, anesthetic risk and different anaesthetic techniques, group 1(n=130), study and group 2 (n = 130) control. Results: The average age studied was 48.91 ±19.18 years.The Average basal FC in study group was 84. 02±17.13 beats/minute and control 74. 73± 1327 beats/minute (p < 0.05); After atropine, 84.36 ±20.2 and 77.42 ±11.3 beats/minute respectively (p < 0.05). The analysis of the behavior of FCand intraoperative PAM Group study: 9 (6. 92%) bradycardia patients (< of 60 beats minute) and normal PAM, 8 (6. 15%) tachycardia and PAM normal and 113 (86. 92%) normal the PAM and the FC. Control: 2 (1. 53%) bradycardia and hypotension, 1 (0. 76 percent) tachycardia and normal PAM and 127 (97. 69%) frequency cardiac normal and PAM. It was found Pearson correlation between dose atropine and FC intraoperative , reverse -0.104 and significance 0.095 . P > 0. 01n. s. dose and PAM value 0. 217 and significance 0000. (p < 0.01). Conclusion: The administration of a therapeutic dose of atropine 0.01 mg/kg, and 0.005 mg/kg keeps the FC and intraoperative PAM with in ranges of normality in ASA I and II ASA, patients for surgical anesthesia according to results. (AU)