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1.
Braz J Microbiol ; 2024 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-39083222

RESUMO

The use of yeast to biologically control the production of ochratoxin A, which is caused by filamentous fungal growth, in coffee farms is a promising alternative to conventional methods. However, yeast strains, environmental field conditions, and the chemical composition of grains / fruits can influence the effectiveness of biological control agents. We tested the efficiency of different yeast strains in controlling three species of ochratoxigenic fungi in a coffee-based medium. The reasons and mechanisms behind the varying sensitivities of different Aspergillus species to biological control remains unclear. Aspergillus carbonarius rapidly assimilated carbon sources, giving it an advantage over yeasts in substrate colonisation. Saccharomyces cerevisiae CCMA 0159 inhibited all three fungal species, achieving efficiencies of 74.4%, 100%, and 80.9% against A. carbonarius, A. westerdijkiae, and A. ochraceus, respectively. The strategies employed by S. cerevisiae CCMA 0159 to inhibit the growth of ochratoxigenic fungi included competition, production of fungicidal volatile compounds, and alteration of the substrate's physicochemical properties. Our results indicate that among the yeast isolates tested, S. cerevisiae CCMA 0159 is the most effective in inhibiting ochratoxigenic fungi in coffee, including the more resistant A. carbonarius.

2.
J Environ Manage ; 357: 120720, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38554451

RESUMO

Construction and demolition waste, along with discarded PET plastic bottles, have evolved into a widespread global resource. However, their current disposal in landfills poses a significant environmental pollution challenge. This research is centered on evaluating the performance of cement mortar composed by larger PET particles in conjunction with sand, construction and demolition waste, and lightweight expanded polystyrene aggregates. The primary objective of this study is to formulate a blend suitable for non-structural elements that can be easily manufactured for social housing construction. This modified blend extends upon the original certified mixture employed at CEVE for brick production, which encompasses cement and 3 mm-long PET particles. The experimental analysis revealed that blend containing 8 mm-long PET particles, in combination with fine aggregates of construction and demolition waste, attained a required mechanical strength of 2 MPa, while preserving the bulk density and hydric properties of the initial PET bricks developed at CEVE in Argentina.


Assuntos
Materiais de Construção , Reciclagem , Resíduos Industriais , Instalações de Eliminação de Resíduos , Argentina
3.
Clin Transl Oncol ; 26(3): 682-688, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37537512

RESUMO

PURPOSE: Immune checkpoint inhibitors (ICIs) have been incorporated in the treatment of metastatic urothelial carcinoma (mUC) upon platinum-based chemotherapy according to the positive results of large clinical trials. Nevertheless, results from unselected populations reflecting real-world data (RWD) are highly informative to the clinician. We reviewed daily clinical practice outcomes in patients with mUC who received atezolizumab in our institution. METHODS: Here we evaluated the clinical activity and safety of atezolizumab in an unselected population of mUC patients who received atezolizumab between 2018 and 2022 reflecting RWD. Efficacy and safety information were retrospectively collected. RESULTS: A total of 63 patients were included. The mean age was 68 years and the objective response rate was 14.3%. The median progression-free survival was 3 months and the median overall survival 6 months. At 1 year, 42% of the patients were alive. ECOG (0 vs 1) and neutrophil-lymphocytes ratio < 2 at the start of ICI were positive prognostic factors that discriminated between long vs short survivors. Overall tolerance was good with no new safety signals. Five patients (17%) had treatment-related adverse events grade ≥ 2 that required corticosteroids. CONCLUSION: In this retrospective study, atezolizumab was an effective and tolerable treatment option for patients with mUC after progression to platinum-based chemotherapy. Yet, patient selection remains critical to improve outcomes.


Assuntos
Anticorpos Monoclonais Humanizados , Carcinoma de Células de Transição , Neoplasias da Bexiga Urinária , Neoplasias Urológicas , Humanos , Idoso , Estudos Retrospectivos , Neoplasias Urológicas/tratamento farmacológico , Platina/uso terapêutico
4.
Vet Parasitol ; 322: 110030, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37729830

RESUMO

This study aimed to evaluate the concomitant use of the nematophagous fungus Duddingtonia flagrans (AC001) and its protease-rich crude extract for the in vitro control of Panagrellus sp., Haemonchus spp., and Trichostrongylus spp. The nematicidal tests were carried out on larvae of the free-living nematode Panagrellus sp. and infective larvae of the gastrointestinal parasitic nematodes of domestic ruminants (Haemonchus spp. and Trichostrongylus spp). Five experimental groups were set: (1) one control group (G1) and (4) four treated groups -G2 - active crude extract; G3 - denatured crude extract; G4 - fungus, and G5 - fungus + active extract. Plates were incubated at 28 ºC for 24 h followed by the recovery of the larvae using the Baermann technique. The results showed a lower recovery of Panagrellus sp. larvae in the experimental groups compared to the control group, as follows: 52 % (G2), 16 % (G3), 46 % (G4), and 77 % (G5). An even greater reduction (77 ± 5 %) occurred in the group (G5). In addition, the authors observed lower averages of L3 of Haemonchus spp. and Trichostrongylus spp. in the experimental groups compared to the control group, as follows: 59 % (G2), 0 % (G3), 86 % (G4), and 76 % (G5). In turn, there was a difference (p < 0.01) between (G5) and (G2). The results this study indicate a positive effect from the compatible use of the D. flagrans fungus and its enzymatic crude extract (protease), which has been demonstrated here for the first time and with potential field applications for further designs.


Assuntos
Duddingtonia , Haemonchus , Rabditídios , Animais , Esporos Fúngicos , Fezes/parasitologia , Peptídeo Hidrolases , Trichostrongylus , Larva/microbiologia , Misturas Complexas , Controle Biológico de Vetores/métodos
5.
Rev Bras Ginecol Obstet ; 43(11): 862-869, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34872145

RESUMO

The puerperium is a complex period that begins with placental delivery and lasts for 6 weeks, during which readaptation of the female organism and redistribution of blood volume occur. This period is conducive to the occurrence of thromboembolic events. In the context of the SARS-CoV-2 pandemic, the virus responsible for COVID-19, the attention of the scientific community and health professionals has been focused on obtaining insights on different aspects of this disease, including etiology, transmission, diagnosis, and treatment. Regarding the pregnancy-postpartum cycle, it is opportune to review the clinical conditions that can occur during this period and to investigate dyspnea as a postpartum symptom in order to avoid its immediate association with COVID-19 without further investigation, which can lead to overlooking the diagnosis of other important and occasionally fatal conditions.


O puerpério é um período complexo que se inicia com a dequitação placentária e dura por 6 semanas, no qual a readaptação do organismo materno e a redistribuição do volume sanguíneo ocorrem, além de ser também um cenário propício para eventos pró-trombóticos. No contexto da pandemia de SARS-CoV-2, vírus responsável pela COVID-19, a atenção da comunidade científica e dos profissionais da saúde está voltada a elucidar os aspectos da doença, como a etiologia, a transmissão, o diagnóstico e o tratamento. Considerando o ciclo gravídico-puerperal, é oportuna a revisão de condições clínicas que ocorrem durante este período e que apresentam a dispneia como sintoma, a fim de evitar que ela seja automaticamente associada à COVID-19 sem investigações aprofundadas, o que pode levar à negligência do diagnóstico de outras condições importantes e que podem ser, por vezes, fatais.


Assuntos
COVID-19 , Dispneia/diagnóstico , Dispneia/epidemiologia , Dispneia/etiologia , Feminino , Humanos , Placenta , Período Pós-Parto , Gravidez , SARS-CoV-2
6.
Rev. bras. ginecol. obstet ; 43(11): 862-869, Nov. 2021. tab
Artigo em Inglês | LILACS | ID: biblio-1357072

RESUMO

Abstract The puerperium is a complex period that begins with placental delivery and lasts for 6 weeks, during which readaptation of the female organism and redistribution of blood volume occur. This period is conducive to the occurrence of thromboembolic events. In the context of the SARS-CoV-2 pandemic, the virus responsible for COVID-19, the attention of the scientific community and health professionals has been focused on obtaining insights on different aspects of this disease, including etiology, transmission, diagnosis, and treatment. Regarding the pregnancy-postpartum cycle, it is opportune to review the clinical conditions that can occur during this period and to investigate dyspnea as a postpartum symptom in order to avoid its immediate association with COVID-19 without further investigation, which can lead to overlooking the diagnosis of other important and occasionally fatal conditions.


Resumo O puerpério é um período complexo que se inicia com a dequitação placentária e dura por 6 semanas, no qual a readaptação do organismo materno e a redistribuição do volume sanguíneo ocorrem, além de ser também um cenário propício para eventos pró-trombóticos. No contexto da pandemia de SARS-CoV-2, vírus responsável pela COVID-19, a atenção da comunidade científica e dos profissionais da saúde está voltada a elucidar os aspectos da doença, como a etiologia, a transmissão, o diagnóstico e o tratamento. Considerando o ciclo gravídico-puerperal, é oportuna a revisão de condições clínicas que ocorrem durante este período e que apresentam a dispneia como sintoma, a fimde evitar que ela seja automaticamente associada à COVID-19 sem investigações aprofundadas, o que pode levar à negligência do diagnóstico de outras condições importantes e que podem ser, por vezes, fatais.


Assuntos
Humanos , Feminino , Gravidez , COVID-19 , Placenta , Período Pós-Parto , Dispneia/diagnóstico , Dispneia/etiologia , Dispneia/epidemiologia , SARS-CoV-2
7.
Nat. Hum. (Online) ; 21(spe): 39-61, jul.-dez. 2019.
Artigo em Português | LILACS-Express | LILACS, Index Psicologia - Periódicos | ID: biblio-1430963

RESUMO

A proposta deste artigo é analisar a ideia de natureza na obra clandestina de Sade, mais especificamente, nas histórias de "Justine" (1787/1999) e de "Juliette" (1801). O exame recairá sobre a fala de dois narradores (dos "Infortúnios da virtude" e da "Nova Justine") e de cinco personagens (Dubois, Noirceuil, Rodin, Braschi e Juliette). Pretende-se estudar quatro noções diferentes de natureza (a compensadora, a criadora, a estúpida e a inexistente) a fim de demonstrar que tais noções formam, na verdade, um único raciocínio, desenvolvido em uma gradação regressiva. Tudo começa em uma natureza onipotente e amoral. Esta se transforma em noção imoral, menos poderosa e que necessita do libertino para desorganizar a matéria, mas passa a se mostrar impotente e inconsequente, até revelar-se uma força tão misteriosa e incompreensível quanto a divindade.


The purpose of this article is to analyze the idea of nature in Sade's clandestine work, more specifically, in the stories of "Justine" (1787/1999) and "Juliette" (1801). The discussion will be based on the speech of two storytellers (from "The Misfortunes of Virtue" and "The New Justine") and five characters (Dubois, Noirceuil, Rodin, Braschi and Juliette). It is intended to study four different notions of nature (the compensator, the creator, the stupid and the nonexistent) in order to show that these notions actually form a single reasoning, developed in a regressive gradation. Everything begins in an omnipotent and amoral nature, which develops in an immoral, less powerful one that requires the libertine to disorganize matter, but it becomes impotent and inconsequential until it reveals itself to be as mysterious and incomprehensible as divinity.

8.
Rev. colomb. anestesiol ; 44(4): 272-277, Oct.-Dec. 2016. tab
Artigo em Inglês | LILACS, COLNAL | ID: biblio-830265

RESUMO

Background: Target-controlled infusion (TCI) systems allow the administration of drug to achieve a target blood or site-effect concentration. We determine induction and recovery times and the amount of drug used with TCI systems vs. manual induction. Objective: To determine whether the induction of propofol TCI and manual infusion are two comparable techniques. Methods: A retrospective observational study was conducted in which sixty-two ASA I-II patients scheduled for elective surgery received induction using TCI or manually. Anaesthetic induction was achieved with remifentanil (0.25 μg/kg/min) and propofol (manual bolus injection: 2 mg/kg, or target blood concentration: 5 μg/ml with the TCI system [Marsh model]) with maintenance doses of remifentanil (0.15 μg/kg/min) and propofol (manually 0.10 mg/kg/min or 2.5-4 μg/ml using the TCI system). In both groups, rocuronium bromide was used (induction and maintenance doses: 0.6 and 0.3 mg/kg, respectively) as was morphine (0.1 mg/kg) 45 min before the end of the surgery. We measured: induction, operative and recovery mean times; bispectral index, heart rate, blood pressure, costs, haemodynamic instability, and intraoperative awareness. A telephone questionnaire was administered 1 month later. Results: The mean induction time was longer in the TCI than the manual group (1.76 ± 0.94 vs. 0.9 ±0.4 min; p < 0.001), but the total dose of propofol (TCI: 112.4 ±60.9 vs. manual: 133.8 ± 80.3 ml, p = 0.241) tended to be smaller and the recovery time was significantly shorter (TCI: 7.48 ±3.1 vs. manual: 10.3 ± 4.9 min) (p = 0.008). Condusions: Induction with propofol using TCI is similar to manually delivered propofol.


Antecedentes: los sistemas de infusión controlada por objetivo (TCI) permiten la administración de fármacos para lograr una concentración en sangre de destino o sitio-efecto. Determinamos los tiempos de inducción y recuperación y la cantidad de fármacos que se usa con los sistemas TCI vs inducción manual. Objetivo: comprobar si la inducción de propofol en TCI y la infusión manual son dos técnicas comparables. Métodos: Estudio observacional retrospectivo en el que sesenta y dos pacientes ASA I-II programados para cirugía electiva recibieron inducción manualmente o usando TCI. La inducción de anestesia se logró con remifentanilo (0,25 μg/kg/min) y propofol (inyección de bolo Manual: 2 mg/kg, o concentración en sangre: 5 μg/ml con el sistema TCI [modelo de Marsh]) con dosis de mantenimiento de remifentanilo (0,15 μg/kg/min) y propofol (0,10 manualmente mg/kg/min o 2.5-1 μg/ml utilizando el sistema de TCI). En ambos grupos, se utilizó bromuro de rocuronio (dosis de inducción y mantenimiento: 0,6 y 0,3 mg/kg, respectivamente) así como la morfina (0,1 mg/kg) 45 minutos antes del final de la cirugía. Medimos: tiempos medios de inducción, mantenimiento y de recuperación; índice biespectral, la frecuencia cardíaca, la presión arterial, los costes, la inestabilidad hemodinámica y el despertar intraoperatorio. Un cuestionario telefónico se administró 1 mes después. Resultados: La media de tiempo de inducción fue mayor en el grupo TCI que en el grupo manual (1,76 ±0,94 vs. 0,9 ±0,4 min; p< 0,001), pero la dosis total de propofol (TCI: 112,4 ±60,9 vs Manual: 133,8 ± 80,3 ml, p = 0,241) tendía a ser más pequeña y el tiempo de recuperación fue significativamente más corto (TCI: 7,48 ±3,1 vs. manual de: 10,3 ± 4,9 min) (p = 0,008) en el grupo TCI. Conclusiones: inducción de propofol en TCI es comparable a la infusión manual.


Assuntos
Humanos
9.
Rev. bras. anestesiol ; 66(5): 475-484, Sept.-Oct. 2016. tab, graf
Artigo em Inglês | LILACS | ID: lil-794815

RESUMO

Abstract Background: Several locoregional techniques have been described for the management of acute and chronic pain after breast surgery. The optimal technique should be easy to perform, reproducible, with little discomfort to the patient, little complications, allowing good control of acute pain and a decreased incidence of chronic pain, namely intercostobrachial neuralgia for being the most frequent entity. Objectives: The aim of this study was to evaluate the paravertebral block with preoperative single needle prick for major breast surgery and assess initially the control of postoperative nausea and vomiting (PONV) and acute pain in the first 24 h and secondly the incidence of neuropathic pain in the intercostobrachial nerve region six months after surgery. Methods: The study included 80 female patients, ASA I-II, aged 18-70 years, undergoing major breast surgery, under general anesthesia, stratified into 2 groups: general anesthesia (inhalation anesthesia with opioids, according to hemodynamic response) and paravertebral (paravertebral block with single needle prick in T4 with 0.5% ropivacaine + adrenaline 3 µg mL−1 with a volume of 0.3 mL kg−1 preoperatively and subsequent induction and maintenance with general inhalational anesthesia). In the early postoperative period, patient-controlled analgesia (PCA) was placed with morphine set for bolus on demand for 24 h. Intraoperative fentanyl, postoperative morphine consumption, technique-related complications, pain at rest and during movement were recorded at 0 h, 1 h, 6 h and 24 h, as well as episodes of PONV. All variables identified as factors contributing to pain chronicity age, type of surgery, anxiety according to the Hospital Anxiety and Depression Scale (HADS), preoperative pain, monitoring at home; body mass index (BMI) and adjuvant chemotherapy/radiation therapy were analyzed, checking the homogeneity of the samples. Six months after surgery, the incidence of neuropathic pain in the intercostobrachial nerve was assessed using the DN4 scale. Results: The Visual Analog Scale (VAS) values of paravertebral group at rest were lower throughout the 24 h of study 0 h 1.90 (±2.59) versus 0.88 (±1.5) 1 h 2.23 (±2.2) versus 1.53 (±1.8) 6 h 1.15 (±1.3) versus 0.35 (±0.8); 24 h 0.55 (±0.9) versus 0.25 (±0.8) with statistical significance at 0 h and 6 h. Regarding movement, paravertebral group had VAS values lower and statistically significant in all four time points: 0 h 2.95 (±3.1) versus 1.55 (±2.1); 1 h 3.90 (±2.7) versus 2.43 (±1.9) 6 h 2.75 (±2.2) versus 1.68 (±1.5); 24 h 2.43 (±2.4) versus 1.00 (±1.4). The paravertebral group consumed less postoperative fentanyl (2.38 ± 0.81 µg kg−1 versus 3.51 ± 0.81 µg kg−1) and morphine (3.5 mg ± 3.4 versus 7 mg ± 6.4) with statistically significant difference. Chronic pain evaluation of at 6 months of paravertebral group found fewer cases of neuropathic pain in the intercostobrachial nerve region (3 cases versus 7 cases), although not statistically significant. Conclusions: Single-injection paravertebral block allows proper control of acute pain with less intraoperative and postoperative consumption of opioids but apparently it cannot prevent pain chronicity. Further studies are needed to clarify the role of paravertebral block in pain chronicity in major breast surgery.


Resumo Justificativa: Estão descritas várias técnicas locorregionais para a abordagem da dor aguda e dor crônica após cirurgia de mama. O ideal seria uma técnica fácil de fazer, reprodutível, com pouco desconforto para as doentes, com poucas complicações e que permitirá um bom controle da dor aguda e uma diminuição da incidência de dor crônica, notadamente dor neuropática do intercostobraquial, por ser a entidade mais frequente. Objetivos: Estudar a aplicação de bloqueio paravertebral com picada única no pré-operatório de cirurgia mamária de grande porte. Avaliar numa primeira fase o controle de dor aguda e náuseas-vômitos no pós-operatório (NVPO) nas primeiras 24 horas e numa segunda fase a incidência de dor neuropática na região do nervo intercostobraquial seis meses após a cirurgia. Métodos: Foram incluídas 80 doentes do sexo feminino, ASA I-II, entre 18 e 70 anos, submetidas a cirurgia mamária de grande porte sob anestesia geral, estratificadas em dois grupos: anestesia geral (anestesia geral inalatória com opioides segundo resposta hemodinâmica) e paravertebral (bloqueio paravertebral com picada única em T4 com ropivacaína 0,5% + adrenalina 3 µg/mL com um volume de 0,3 mL/kg pré-operatoriamente e posterior indução e manutenção com anestesia geral inalatória). No pós-operatório imediato foi colocada PCA (Patient-controlled analgesia) de morfina programada com bolus a demanda durante 24 horas. Foram registados fentanil intraoperatório, consumo de morfina pós-operatória, complicações relacionadas com as técnicas, dor em repouso e ao movimento a 0, 1 h, 6 h e 24 h, assim como os episódios de NVPO. Foram analisadas todas as variáveis identificadas como fatores de cronificação da dor idade, tipo de cirurgia, ansiedade segundo escala de HADS (Hospital Anxiety and Depression scale), dor pré-operatória; acompanhamento no domicílio; índice de massa corporal (IMC), tratamentos adjuvantes de quimioterapia/radioterapia e foi verificada a homogeneidade das amostras. Aos seis meses da cirurgia foi avaliada, segundo escala DN4, a incidência de dor neuropática na área do nervo intercostobraquial. Resultados: O grupo paravertebral teve valores de VAS (Escala Visual Analógica) em repouso mais baixos ao longo das 24 horas de estudo 0 h 1,90 (± 2,59) versus 0,88 (± 1,5); 1 h 2,23 (± 2,2) versus 1,53 (± 1,8); 6 h 1,15 (± 1,3) versus 0,35 (± 0,8); 24 h 0,55 (± 0,9) versus 0,25 (± 0,8) com significado estatístico às 0 e às 6 horas. Em relação ao movimento o grupo paravertebral teve valores de VAS mais baixos e com significância estatística nos quatro momentos de avaliação: 0 h 2,95 (± 3,1) versus 1,55 (± 2,1); 1 h 3,90 (± 2,7) versus 2,43 (± 1,9) 6 h 2,75 (± 2,2) versus 1,68 (± 1,5); 24 h 2,43 (± 2,4) versus 1,00 (± 1,4). O grupo paravertebral consumiu menos fentanil (2,38 ± 0,81 µg/Kg versus 3,51 ± 0,81 µg/Kg) e menos morfina no pós-operatório (3,5 mg ± 3,4 versus 7 mg ± 6,4), com diferença estatisticamente significativa. Na avaliação de dor crônica aos seis meses no grupo paravertebral houve menos casos de dor neuropática na região do nervo intercostobraquial (três versus sete) embora sem significância estatística. Conclusões: O bloqueio paravertebral com picada única permite um adequado controle da dor aguda com menor consumo de opioides intraopreatórios e pós-operatórios, mas aparentemente não consegue evitar a cronificação da dor. Mais estudos são necessários para esclarecer o papel do bloqueio paravertebral na cronificação da dor em cirurgia mamária de grande porte.


Assuntos
Humanos , Feminino , Adolescente , Adulto , Idoso , Adulto Jovem , Dor Pós-Operatória/tratamento farmacológico , Plexo Braquial , Mama/cirurgia , Manejo da Dor/métodos , Nervos Intercostais , Bloqueio Nervoso , Neuralgia/tratamento farmacológico , Doença Aguda , Doença Crônica , Estudos Prospectivos , Náusea e Vômito Pós-Operatórios/tratamento farmacológico , Anestesia Geral , Pessoa de Meia-Idade , Neuralgia/etiologia
10.
Braz J Anesthesiol ; 66(5): 475-84, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27591461

RESUMO

BACKGROUND: Several locoregional techniques have been described for the management of acute and chronic pain after breast surgery. The optimal technique should be easy to perform, reproducible, with little discomfort to the patient, little complications, allowing good control of acute pain and a decreased incidence of chronic pain, namely intercostobrachial neuralgia for being the most frequent entity. OBJECTIVES: The aim of this study was to evaluate the paravertebral block with preoperative single needle prick for major breast surgery and assess initially the control of postoperative nausea and vomiting (PONV) and acute pain in the first 24h and secondly the incidence of neuropathic pain in the intercostobrachial nerve region six months after surgery. METHODS: The study included 80 female patients, ASA I-II, aged 18-70 years, undergoing major breast surgery, under general anesthesia, stratified into 2 groups: general anesthesia (inhalation anesthesia with opioids, according to hemodynamic response) and paravertebral (paravertebral block with single needle prick in T4 with 0.5% ropivacaine+adrenaline 3µgmL(-1) with a volume of 0.3mLkg(-1) preoperatively and subsequent induction and maintenance with general inhalational anesthesia). In the early postoperative period, patient-controlled analgesia (PCA) was placed with morphine set for bolus on demand for 24h. Intraoperative fentanyl, postoperative morphine consumption, technique-related complications, pain at rest and during movement were recorded at 0h, 1h, 6h and 24h, as well as episodes of PONV. All variables identified as factors contributing to pain chronicity age, type of surgery, anxiety according to the Hospital Anxiety and Depression Scale (HADS), preoperative pain, monitoring at home; body mass index (BMI) and adjuvant chemotherapy/radiation therapy were analyzed, checking the homogeneity of the samples. Six months after surgery, the incidence of neuropathic pain in the intercostobrachial nerve was assessed using the DN4 scale. RESULTS: The Visual Analog Scale (VAS) values of paravertebral group at rest were lower throughout the 24h of study 0h 1.90 (±2.59) versus 0.88 (±1.5) 1h 2.23 (±2.2) versus 1.53 (±1.8) 6h 1.15 (±1.3) versus 0.35 (±0.8); 24h 0.55 (±0.9) versus 0.25 (±0.8) with statistical significance at 0h and 6h. Regarding movement, paravertebral group had VAS values lower and statistically significant in all four time points: 0h 2.95 (±3.1) versus 1.55 (±2.1); 1h 3.90 (±2.7) versus 2.43 (±1.9) 6h 2.75 (±2.2) versus 1.68 (±1.5); 24h 2.43 (±2.4) versus 1.00 (±1.4). The paravertebral group consumed less postoperative fentanyl (2.38±0.81µgkg(-1) versus 3.51±0.81µgkg(-1)) and morphine (3.5mg±3.4 versus 7mg±6.4) with statistically significant difference. Chronic pain evaluation of at 6 months of paravertebral group found fewer cases of neuropathic pain in the intercostobrachial nerve region (3 cases versus 7 cases), although not statistically significant. CONCLUSIONS: Single-injection paravertebral block allows proper control of acute pain with less intraoperative and postoperative consumption of opioids but apparently it cannot prevent pain chronicity. Further studies are needed to clarify the role of paravertebral block in pain chronicity in major breast surgery.


Assuntos
Plexo Braquial , Mama/cirurgia , Nervos Intercostais , Bloqueio Nervoso , Neuralgia/tratamento farmacológico , Manejo da Dor/métodos , Dor Pós-Operatória/tratamento farmacológico , Doença Aguda , Adolescente , Adulto , Idoso , Anestesia Geral , Doença Crônica , Feminino , Humanos , Pessoa de Meia-Idade , Neuralgia/etiologia , Náusea e Vômito Pós-Operatórios/tratamento farmacológico , Estudos Prospectivos , Adulto Jovem
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