Introdução. A morbi-mortalidade durante e após anestesia para aneurismectomia de aorta abdominal é alta, pois esta doença acomete pacientes após a sétima década de vida e que possuem várias doenças concomitantes. Objetivos. Analisar e discutir as condutas anestésicas utilizadas nos períodos pré e intra-operatório no Serviço de Anestesiologia do HCFMRP-USP. Casuística e Método. Foram analisados os prontuários de 104 pacientes submetidos à aneurismectomia de aorta no tocante às condutas utilizadas pelos anestesiologistas para a condução destes casos. Resultados. Apenas um paciente possuía menos de 40 anos de idade, 76,80% estavam na sétima ou oitava década de vida e 88,46% eram do sexo masculino. A hipertensão arterial acometeu 70,19% dos pacientes e 26,92% possuíam coronariopatia. Pacientes com obesidade foram a minoria (26,92%). O ecocardiograma pré-operatório demonstrou que a grande maioria dos pacientes apresentava função ventricular normal. A cirurgia foi realizada em regime de urgência em 7,69% dos casos. A anestesia geral exclusiva foi realizada em 17 pacientes e associada com a peridural em 57 pacientes, com a raquianestesia em 11 e com a raqui-peri combinadas em 19. O tempo cirúrgico variou de 120 a 510 minutos enquanto que o tempo de clampeamento aórtico variou de 30 a 165 minutos. Houve um óbito no período intra-operatório e a causa foi choque hipovolêmico e 10 óbitos até o vigésimo dia pós-operatório. Sessenta e seis pacientes receberam concentrado de papa de hemácias durante o período intra-operatório, mas só em 43,27% desses casos a indicação esteve suportada por exame laboratorial. Oitenta pacientes foram extubados ainda na sala de cirurgia, enquanto que os demais (23) permaneceram intubados no período pós-operatório e 19 necessitaram de suporte ventilatório que teve tempo que variou de 3 a 96 horas com média de 42,31 horas. Apenas quatro pacientes fizeram pós-operatório imediato no Centro de Terapia Intensiva enquanto que os demais permaneceram na Sala de Recuperação Pós-Anestésica. Conclusão. Não existe um protocolo único para a realização de anestesia para aneurismectomia de aorta no HCFMRP-USP e a técnica anestésica utilizada não influenciou o morbi-mortalidade. / Introduction. The morbidity and mortality during and after anesthesia for aneurysmectomy of the abdominal aorta are high since this disease affects patients after the seventh decade of life who have several concomitant diseases. Objectives. To analyze and discuss the anesthetic conducts used during the preoperative and intra-operative periods at the Service of Anesthesiology of HCFMRP-USP. Cases and Method. The medical records of 104 patients submitted to aneurysmectomy of the aorta were analyzed regarding the conducts used by the anesthesiologists for the management of these cases. Results. Only one patient was less than 40 years old, 76.80% were in he seventh or eighth decade of life, and 88.46% were male. Arterial hypertension was present in 70.19% of the patients and 26.92% had coronary artery disease. Obese patients were a minority (26.92%). The preoperative echocardiogram demonstrated that most patients had normal ventricular function. Surgery was performed on an emergency basis in 7.69% of cases. Seventeen patients received exclusive general anesthesia, while general anesthesia was associated with peridural anesthesia in 57, with rachi-anesthesia in 11 and with combined rachi-peridural anesthesia in 19. Surgical time ranged from 120 to 510 minutes and time of aortic clamping ranged from 30 to 165 minutes. One death occurred intra-operatively due to hypovolemic shock and 10 patients died up to the 20th postoperative day. Sixty-six patients received a red blood cell concentrate intra-operatively, but this indication was supported by a laboratory exam in only 43.27% of these cases. Eighty patients were extubated while still in the operating room while the remaining 23 continued to be intubated during the postoperative period and 19 required ventilatory support lasting 3 to 96 hours (mean duration: 42.31 hours). Only four patients spent the immediate postoperative period in the Intensive Care Unit, while the remaining ones stayed in the Post-Anesthesia Recovery Room. Conclusion. There is no single protocol for the application of anesthesia for aneurysmectomy of the aorta at HCFMRP-USP and the anesthetic technique used did not influence morbidity-mortality.

Bakgrund: Rädsla och oro inför en operation och inför generell anestesi förekommer i högre grad hos kvinnor än hos män. Dessutom beskrivs ofta litotomipositionen som en otrygg upplevelse av kvinnor vid vaginala undersökningar. Vid vaginala operationer ligger kvinnor i denna position och det är rimligt att anta att det även i denna situation kan påverka trygghetsupplevelsen. Det finns många fördelar med att genomföra gynekologiska operationer vaginalt jämfört med abdominella eller laparoskopiska operationer och blir alltmer en vanligare operationsmetod. Det är av betydelse att kvinnor känner trygghet och välbefinnande inför operationen, inte minst för att de ska kunna återhämta sig optimalt postoperativt. Syfte: Syftet med denna studie var att beskriva kvinnors perioperativa upplevelser av trygghet vid vaginala operationer under generell anestesi. Metod: Kvinnor intervjuades genom semistrukturerade intervjuer som sedan analyserades med kvalitativ innehållsanalys. Resultat: Resultatet består av tre stycken kategorier: Att ha någon närvarande som ser en genom operationens alla delar; Att någon berättar vad som ska ske och att få tillräckligt med information; och Att få känna sig skyld och påklädd då man är i en utsatt situation. Slutsats: Kvinnor upplevde både trygghet och otrygghet perioperativt vid vaginala operationer under generell anestesi. Ögonkontakt och beröring samt att informera kvinnor vad som ska ske ökade trygghetskänslan. Att inte få tillräckligt med information både pre-, intra- och post-operativt uppfattades som otryggt. Gynställningen upplevdes som ett orosmoment och skapade otrygghet hos kvinnor där de påtalade vikten av att bli sövd innan positionering

The first cases of patients with pneumonia which grew into an acute respiratory distress syndrome and caused breathing problems began to appear in December 2019. Coronavirus disease 2019 (COVID-19) is the cause of a global pandemic and it is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). A complex interplay of factors is responsible for the progression of the disease. Some studies suggest that it promotes oxidative stress and thus may lead to oxidative damage to cells and DNA. The purpose of this study was to observe the relationship between oxidative DNA damage and a critical condition caused by COVID-19 using a comet assay technique. The basic principle of the used method consists in fixation of lymphocytes in an agarose gel, removal of the membrane and cytoplasm of cells, incubation with specific enzymes and electrophoresis. In the process of electrophoresis, negatively charged DNA fragments migrates towards the anode and the cell thus acquires the typical shape of a comet. Comets are visualized using the DNA intercalation dye ethidium bromide. We quantified single - strand breaks and oxidized pyrimidines and purines by using specific enzymes (modification of the method for detecting specific lesions). Results are reported as % tail DNA, thus the percentage of DNA in the...

Background: Aim of this study was to describe the characteristics of 1- to 6-year-old children who underwent general anesthesia (GA) in a German specialized pediatric dental institution between 2002 and 2011, and to evaluate the risk factors (age, migration background, nutritional status) for caries experience (dmf-s) in these children. Methods: A cross-sectional study with retrospective data collection was designed. Children who underwent comprehensive dental treatment under GA were enrolled in the study. The data were collected from patient records and included personal background: age, sex, dmf-s, nutritional status, reasons for GA and treatments provided. Mann–Whitney-U test, Chi-square tests, and linear regression modelling were applied for statistical analyses. Results: 652 children (median age: 3 years [IQR: 2–4], 41.6% female) were treated under GA between 2002 and 2011. Of these, 30.8% had migration background, 17.3% were underweight and 14.8% overweight. The median dmf-s was 28 (IQR: 19–43.5). Univariate, only age and migration showed a significant association with dmf-s (p < 0.01) up to the age of 5 years. In the linear regression analysis, this association of dmf-s with age (OR: 4.04/CI: 2.81–5.27; p < 0.01) and migration (OR: 4.26/CI: 0.89–7.62; p = 0.013) was confirmed. At the patient level, tooth extraction was the most chosen option in both time periods, however, more restorative approaches were taken between 2007 and 2011 including pulp therapy and the use of strip and stainless steel crowns compared to 2002–2006. Conclusions: Children aged 1–6 years treated under GA showed a high caries experience (dmf-s), whereby age as well as migration, but not BMI, were relevant risk factors. Although tooth extraction is the first choice in most cases in the first time period, more conservative procedures were performed in the second half of the follow-up period.

Bakgrund: Inför generell anestesi upplever många patienter en känsla av oro och rädsla. Anestesisjuksköterskan har ett viktigt ansvar i mötet med patienter för att skapa tillit, förtroende och trygghet mellan patient och anestesisjuksköterska. Syfte: Syftet med denna systematiska litteraturstudie var att beskriva vad patienter känner oro för inför generell anestesi med utgångspunkt från två frågeställningar. Vad är det patienter oroar sig för inför generell anestesi? Och vilka faktorer påverkar risken att uppleva oro inför generell anestesi? Metod: Utifrån syftet och dess frågeställningar utfördes en systematisk litteraturstudie där litteratursökningen gjordes i PubMed och Cinahl. Utifrån sökningen inkluderades 18 vetenskapliga artiklar, av både kvantitativ och kvalitativ design. Dessa analyserades i fyra steg som innebar reduktion av data, att skapa en översikt, att göra jämförelser samt att dra slutsatser och verifiera. Resultat: Oro och rädsla är vanliga känslor som förekommer inför generell anestesi. Patienterna var främst oroliga för att dö under anestesin, att vakna upp under anestesi, att uppleva smärta samt att förlora kontrollen. Riskfaktorer för oro som identifierades var kvinnligt kön, ålder under 45 år, lägre utbildningsnivå samt långa väntetider och operationstid sent på dagen. Tidigare erfarenheter av operationer visade sig vara en skyddande faktor.  Slutsats: Studien visar att de flesta patienter upplever oro och rädsla inför generell anestesi. För att minska känslan av otrygghet är det viktigt att patienten känner att anestesipersonalen har sitt fokus på patienten. Detta skapar tillit, förtroende och trygghet hos patienten. Information är en viktig del av omhändertagande och genom att se till att ha välinformerade patienter skapas förutsättningar för att patienterna upplever mindre oro och rädsla. För att minska graden av oro och rädsla inför generell anestesi bör anestesisjuksköterskan visa på ett genuint sätt att de finns där för patienten och att patienten får känna att de är i personalens fokus hela tiden.

Diverses études cliniques ont démontré l’existence d’un métabolisme extrahépatique du propofol. Le lieu exact de ce métabolisme n’est pas encore complètement élucidé chez l’homme. Des données chez l’animal suggèreraient que le poumon pourrait contribuer à la clairance totale du propofol. Le présent projet vise à investiguer la contribution pulmonaire à l’élimination systémique du propofol chez des patients sous anesthésie générale. Quatorze patients de type ASA I ou II, âgés entre 35 et 70 ans, pour lesquels une chirurgie cardiaque de routine était prévue, ont été inclus dans la présente étude. Le protocole a été préalablement approuvé par le comité d’éthique et les patients ont tous donné par écrit leur consentement éclairé. Le recrutement des patients a eu lieu à l’hôpital Royal Victoria. Le propofol a été administré en induction sous forme de bolus intraveineux, suivi d’une perfusion continue de 50 g/kg/min. Chez un même patient, des prélèvements sanguins pré- et post pulmonaires ont été pris simultanément de l’artère radiale et de l’artère pulmonaire, sous des conditions de ventilation contrôlée ou apnéiques, dans le but de mesurer les concentrations plasmatiques du propofol. Le gradient artério-veineux a été évalué à l’état d’équilibre afin de déterminer la contribution du poumon à l’élimination totale de propofol. Nous n’avons pas pu démontrer l’existence d’une extraction pulmonaire du propofol chez l’humain. Ceci pourrait être dû à plusieurs facteurs méthodologiques. / Several clinical studies have demonstrated the existence of propofol extrahepatic metabolism. The exact nature and site of this metabolism is not fully elucidated in man, however, the lung may possibly contribute to propofol total clearance as suggested by animal findings. In the present study, pulmonary contribution to total body elimination of propofol was investigated in patients during cardio-surgical anesthesia. Following informed consent and research ethic board approval, fourteen patients-ASA category I or II, between 35 and 70 years of age and scheduled for routine cardiac surgery were included in the present study. Patients were recruited at Royal-Victoria Hospital. At induction, propofol was administered as an intravenous bolus followed by a continuous infusion rate of 50 g/kg/min. Arterial and mixed-venous blood samples were drawn simultaneously from the radial artery and pulmonary artery catheters from patients under controlled ventilation or apneic conditions, for measurement of plasma propofol concentrations. Arterio-venous gradient was assessed under steady-state conditions to evaluate a potential contribution of the lung to the overall elimination of propofol. No statistically significant differences were found between both sampling sites, either under controlled ventilation or after a short period of apnea. We were unable to demonstrate the existence of propofol pulmonary extraction in the lungs in humans. This might be explained by methodological factors

INTRODUÇÃO: Existem poucas evidências de benefícios da analgesia regional na disfunção respiratória observada no pós-operatório (PO) de cirurgia cardíaca. Os objetivos deste estudo foram avaliar os efeitos da morfina intratecal sobre a função respiratória, a analgesia, o consumo de morfina e seus níveis plasmáticos no PO de pacientes submetidos à anestesia geral para revascularização do miocárdio (RM). MÉTODOS: Foram estudados 42 pacientes submetidos à RM com circulação extracorpórea e randomizados para receberem anestesia geral associada ou não a morfina intratecal na dose de 400 g (grupo controle, n=22 e grupo morfina, n=20). A anestesia geral foi padronizada com sufentanil e isoflurano e no PO imediato, instalou-se dispositivo de analgesia controlada pelo paciente, com bolus de 1 mg, em livre demanda e dipirona se necessário. Com espirômetro digital, avaliou-se a capacidade vital forçada (CVF), o volume expiratório forçado no primeiro segundo (VEF1), a relação VEF1/CVF e, pela análise da gasometria artérial, calculou-se a relação PaO2/FIO2 no pré-operatório, primeiro e segundo dias de PO. A intensidade da dor, avaliada com escala visual numérica (0-10), o número de solicitações e o consumo de morfina venosa, assim como seus níveis plasmáticos, foram avaliados até 36 horas de PO. A análise estatística consistiu de análise de variância para medidas repetidas e teste de Mann-Whitney, considerando-se significativo p<0,05. RESULTADOS: Em ambos os grupos houve redução da CVF (grupo controle=1,45 L e 1,38 L, grupo morfina= 1,18 L e 1,26 L no primeiro e segundo dias de PO, respectivamente), sem diferença entre os mesmos (p=0,06). Não foram observadas diferenças entre os grupos no VEF1 (p=0,085), nas relações VEF1/CVF (p=0,68) e PaO2/FiO2 (p=0,08) nos tempos avaliados. O grupo morfina apresentou valores significativamente menores de dor no repouso e inspiração profunda e, principalmente, durante a tosse após 18 horas (grupo controle=4,73 e grupo morfina=1,80, p=0,001), 24 horas (grupo controle=4,41 e grupo morfina=1,40, p=0,022) e 36 horas (grupo controle=3,09 e grupo morfina=1,55, p=0,015) de PO. Observou-se redução do consumo cumulativo de morfina venosa após 18 horas (grupo controle=20,14 mg e grupo morfina=14,10 mg, p=0,037) e 24 horas de PO (grupo controle= 27,8 mg e grupo morfina= 13,55 mg, p=0,028). Após 24 horas de PO, o grupo que recebeu opióide intratecal apresentou menores níveis plasmáticos de morfina (grupo controle=16,41 ng/mL e grupo morfina=4,08 ng/mL, p=0,029). CONCLUSÕES: O efeito central da morfina intratecal não minimizou a disfunção respiratória mas promoveu redução da intensidade da dor, com diminuição do consumo venoso e menores níveis plasmáticos de morfina no PO de pacientes submetidos à cirurgia de RM. / BACKGROUNDS: Few evidence exists on beneficial effects of intrathecal analgesia in lung dysfunction observed in postoperative (PO) of cardiac surgery. The objective of this study was to evaluate the effects of intrathecal morphine on pulmonary function, analgesia, morphine consumption and plasma morphine levels in PO of patients undergoing coronary artery bypass graft surgery (CABG). METHODS: Were studied 42 patients undergoing on-pump CABG randomized (control group, n=22 and morphine group, n=20) to receive general anesthesia with or not 400 g of intrathecal morphine. Anesthesia was standardized and in immediate PO, patients received a patient controlled-analgesia pump, 1 mg bolus of morphine, free demand and dipirone if necessary. Forced vital capacity (CVF), expiratory forced volume in first second (EFV1) and EFV1/FVC ratio were measured using spirometry and arterial blood samples obtained preoperatively, in first and second PO days. Intensity of pain, evaluated using visual numeric scale (0-10), morphine solicitation and consumption and plasma morphine levels were evaluated until 36 hours of PO. Statistical analysis was done with repeated measures analysis of variance and Mann-Whiney test (*p<0.05). RESULTS: Both groups had reduction of FVC in PO (control group=1.45 L and 1.38 L, and morphine group=1.18 L and 1.26 L, respectively in first and second PO (p= 0.06) without differences between them. There were no differences in EFV1 (p=0.085), VEF1/CVF (p=0.68) and PaO2/FiO2 ratio between groups (p=0.08). In morphine group was observed reduction in intensity of pain at rest and profound inspiration but most significatively at cough after 18 hours PO (control group=4.73 and morphine group=1.80, p=0.001), 24 hours (control group=4.41 and morphine group=1.40, p=0.022) and 36 hours (control group=3.09 and morphine group=1.55, p=0.015). Was observed reduction in morphine consumption after 18 hours PO (control group=20.14 mg and morphine group=14.10 mg, p=0.037) and after 24 hours (control group=27.8 mg and morphine group= 13.55, p=0.028). After 24 hours of PO, morphine group has reduced plasma morphine levels (control group=16,41 ng/mL and morphine group=4.08 ng/mL, p=0.029). CONCLUSIONS: Central neuraxial effect of morphine did not reduced postoperative pulmonary dysfunction but promoted better postoperative analgesia, reducing pain scores, venous morphine consumption and lower plasma morphine levels in CABG.

Die Validierung und Etablierung einer zuverlässigen Methode zur Erfassung der Narkosetiefe bleibt bis heute, speziell in der Kinderanästhesie, problematisch. Ziel der vorliegenden Arbeit war die Erstellung einer deskriptiven Verlaufsanalyse akustisch evozierter Potentiale mittlerer Latenz (MLAEP‘s) im Kindesalter. Unter Allgemeinanästhesie wurde mit Hilfe des AEPex-Monitors die Validität, Reagibilität und Korrelation der MLAEP‘s im Vergleich zu den beiden wichtigen hämodynamischen Parametern Herzfrequenz und mittlerer arterieller Blutdruck untersucht. Ein besonderer Schwerpunkt hierbei lag auf der Untersuchung der Praktikabilität des eingesetzten AEP-Monitorings. Dazu wurden 56 Kinder, davon 29 unter total intravenöser Anästhesie und 27 unter balancierter Anästhesie in die Studie eingeschlossen. Die Steuerung der Narkosetiefe erfolgte nach rein klinischen Kriterien. Nachträglich wurden die zu analysierenden Patienten in 3 verschiedene Altersgruppen (2-<4, 4-<10 und 10-<17 Lebensjahr) unterteilt und auf Auffälligkeiten hin untersucht. Die Anwendung des AEPex-Monitors war unkompliziert und ohne größeren personellen oder zeitlichen Aufwand in den Anästhesiearbeitsplatz zu integrieren. Während unter inhalativer Anästhesie zum Teil eine Zunahme der Amplituden Na/Pa und Pa/Nb bei der visuellen Inspektion des Signals beobachtet wurde, waren die Ergebnisse unter total intravenöser Anästhesie denen Erwachsener vergleichbar. Sowohl die Veränderungen des Blutdruckes als auch des AEPex waren ein- bis eineinhalb Minuten nach Applikation eines Propofolbolus als zuverlässiges Korrelat für eine Veränderung im Sedierungslevel darstellbar. Zusätzlich konnte in dieser Studie gezeigt werden, dass akustisch evozierte Potentiale mittlerer Latenz mit dem mittleren arteriellen Blutdruck, aber nicht mit der Herzfrequenz, unter intraoperativ hämodynamisch stabilen Bedingungen korrelieren (HI: rs(xy•z) = 0,583; p = 0,003). Jüngere Kinder (2-<4 LJ.) zeigten entweder tendenziell oder signifikant höhere Werte. Nach der Integration altersspezifischer Besonderheiten in der Weiterentwicklung prozessierter AEP-Parameter und der Überwindung gerätespezifischer Unzulänglichkeiten scheint auch im Kindesalter eine Hypnosetiefenbestimmung möglich.

Introduction: Hysterectomy is the most common major gynecological operation in the Western World and approximately 5000 benign hysterectomies are performed in Sweden every year. Consequently it is a surgical procedure that affects many women. The procedure comprises challenges concerning perioperative health care, perceived postoperative symptoms, quality of life aspects and health economics. The concept of fast track is a multimodal strategy to reduce hormonal surgical stress response and achieve an enhanced postoperative recovery and is today considered to be evidence based in relation to colorectal surgery. Spinal anesthesia, as an important part of fast track, provides benefits of extended effect on analgesia and reduced postoperative morbidity. It is reasonable to believe that employing the strategies of fast track including spinal anesthesia could also provide substantial benefits for women requiring surgical removal of the uterus. Aims: To determine whether duration of hospital stay, presence and intensity of postoperative symptoms, duration of sick leave and cost-effectiveness differ between women undergoing benign fast track abdominal hysterectomy in spinal anesthesia with intrathecal morphine (SA) and in standard general anesthesia (GA). Material &amp; Methods: 180 women participated in this open randomized multicenter study with five participating hospitals in the southeast region of Sweden. One hundred and sixty two completed the study; 82 women were randomized to SA and 80 to GA. A fast track model comprising premedication without sedatives, intravenous fluid regulation, analgesics based on non-opioids, pre-emptive antiemetic therapy, early enteral nutrition and mobilization and standard criteria for discharge were used. End points were duration of hospital stay, use of analgesics, perceived postoperative symptoms, occurrence of postoperative complications, duration of sick leave and health economic evaluations. Results: Duration of hospital stay did not differ between the two modes of anesthesia. Vomiting and pruritus occurred significantly more often after SA. Complication rates did not differ between groups. Women with SA experienced less overall discomfort and had a reduced need for opioids postoperatively. Abdominal pain, drowsiness and fatigue occurred less often and with lower intensity among the women in the SA group. Health related quality of life improved faster and the duration of sick leave was shorter in women after SA. Total costs (hospital costs plus costs for productivity loss) were lower for the SA group. Within the first 29 days after hysterectomy the women in the SA group gained more QALYs than women in the GA group. Conclusions: The duration of hospitalisation after fast track abdominal hysterectomy was less than 50 hours and mode of anesthesia did not influence this. SA displayed considerable advantages regarding postoperative symptoms and recovery. SA was considered cost-effective in comparison with GA due to lower total costs and more QALYs gained. Our study indicates that SA should be recommended as the first choice of anesthesia in benign abdominal hysterectomy.

O objetivo do presente trabalho foi desenvolver e validar um método analítico empregando microextração em fase sólida (SPME) para detecção e quantificação de isoflurano (ISO) na forma volátil e incluso em nanoemulsões intravenosas e, ainda, avaliar o efeito biológico destas. A detecção do ISO foi realizada através de cromatografia em fase gasosa com detector de ionização de chama (CG/DIC). As condições ideais para realização da pré-concentração e extração de ISO através da técnica de SPME foram temperatura ambiente, agitação constante, 30 min de extração e 2 min de dessorção no injetor do CG. O método desenvolvido foi validado avaliando os parâmetros de especificidade, linearidade, limites de detecção e quantificação, precisão, exatidão e robustez. As nanoemulsões contendo ISO foram desenvolvidas através da homogeneização à alta pressão, e apresentaram diâmetro médio, índice de polidispersão, potencial zeta e pH de 150 ± 0,78 nm, 0,08 ± 0,01, - 18 ± 2,4 mV e 6,03 ± 0,04, respectivamente. O pH foi ajustado para 7,4 (valor fisiológico). O teor de ISO nas formulações foi de 98,4 %. Não houve modificação das características físico-químicas das nanoemulsões após 30 dias de armazenamento a 8 ºC. Análises de espalhamento de luz múltiplo não demonstraram tendência a fenômenos de instabilidade física para as formulações. Os estudos do efeito anestésico das nanoemulsões intravenosas contendo ISO em cães evidenciaram uma redução significativa (p < 0,05) na dose comparada com a administração de ISO volátil. Não houve alterações no débito cardíaco, saturação de oxigênio na hemoglobina e nos biomarcadores das funções renal, hepática e muscular. Uma queda na pressão arterial dos cães foi observada em todos os tratamentos devido ao efeito hipotensor do ISO. Após administração das nanoemulsões contendo ISO e branca, observou-se taquipnéia, edema, eritema, e baixas concentrações de dióxido de carbono expiradas. Assim, a nanoemulsificação do ISO foi realizada com sucesso e a aplicação na anestesia geral intravenosa foi demonstrada. / The aims of this work were to develop and validate an analytical method using solidphase microextraction (SPME) to detect and quantify isoflurane (ISO) inhalation liquid and loaded in intravenous nanoemulsions, and also evaluate the biological effect of the formulations. ISO detection was made by gas chromatography with flame ionization detector (GC/FID). The ideal conditions setting for the pre concentration and extraction of ISO through SPME were environmental temperature, constant stirring, 30 min for extraction and 2 min for analyte desorption in the GC inlet port. The developed method was validated by means of specificity, linearity, detection and quantification limits, precision, accuracy and robustness. The ISOloaded nanoemulsions were formulated by high-pressure homogenization, and presented average diameter, polydispersity index, zeta potential and pH of 150 ± 0.78 nm, 0.08 ± 0.01, -18 ± 2.4 mV and 6.03 ± 0.04, respectively. The pH was adjusted to 7.4 (physiological value). The drug content on the formulations was 98.4 %. After 30 days of storage at 8 ºC no changes on nanoemulsion’s physicalchemical characteristics were observed. Multiple light scattering analysis did not demonstrate any physical destabilization phenomena for the formulations. The anesthetic effect study for the intravenous ISO-loaded nanoemulsions in dogs highlighted a significant reduction (p < 0.05) in dosage regimen when compared to the volatile ISO administration. There were no alterations on cardiac rate, oxygen hemoglobin saturation and on biomarkers of the renal, hepatic and muscle functionalities. A decrease in dog’s arterial blood pressure in all treatments due the hypotensive effect caused by ISO was observed. After the administration of the nanomulsions, ISO-loaded and unloaded, occurred tachypnea, edema, erythema and low end tidal concentrations of carbon dioxide. Taking all above into account, the method was considered easy on execution and suitable for laboratory routines, the ISO nanoemulsification was made successfully and its application on general anesthesia was demonstrated.