Morning or Afternoon Scheduling for Elective Coronary Artery Bypass Surgery: Influence of Longer Fasting Periods from Metabolic and Hemodynamic Perspectives.

BACKGROUND: Prolonged preoperative fasting may worsen postoperative outcomes. Cardiac surgery has higher perioperative risk, and longer fasting periods may be not well-tolerated. We analysed the postoperative metabolic and hemodynamic variables in patients undergoing elective coronary artery bypass grafting (CABG) according to their morning or afternoon schedule. METHODS: Single-centre retrospective study at University teaching hospital (1-year data collection from electronic medical records). Using a mixed-effects linear regression model adjusted for several covariates, we compared metabolic (lactatemia, pH, and base deficit [BD]) and haemodynamic values (patients on vasoactive support, and vasoactive inotropic score [VIS]) at 7 prespecified time-points (admission to intensive care, and 1st, 3rd, 6th, 12th, 18th, and 24th postoperative hours). RESULTS: 339 patients (n = 176 morning, n = 163 afternoon) were included. Arterial lactatemia and BD were similar (overall P = 0.11 and P = 0.84, respectively), while pH was significantly lower in the morning group (overall P < 0.05; mean difference -0.01). Postoperative urine output, fluid balance, mean arterial pressure, and central venous pressure were similar (P = 0.59, P = 0.96, P = 0.58 and P = 0.53, respectively). A subgroup analysis of patients with diabetes (n = 54 morning, n = 45 afternoon) confirmed the same findings. The VIS values and the proportion of patients on vasoactive support was higher in the morning cases at the 18th (P = 0.002 and p=0.04, respectively) and 24th postoperative hours (P = 0.003 and P = 0.04, respectively). Mean intensive care length of stay was 1.94 ± 1.36 days versus 2.48 ± 2.72 days for the afternoon and morning cases, respectively (P = 0.02). CONCLUSIONS: Patients undergoing elective CABG showed similar or better metabolic and hemodynamic profiles when scheduled for afternoon surgery.

Clinical Impact of a Protocol Involving Cone-Beam CT (CBCT), Fusion Imaging and Ablation Volume Prediction in Percutaneous Image-Guided Microwave Ablation in Patients with Hepatocellular Carcinoma Unsuitable for Standard Ultrasound (US) Guidance.

PURPOSE: to evaluate the clinical impact of a protocol for the image-guided percutaneous microwave ablation (MWA) of hepatocellular carcinoma (HCC) that includes cone-beam computed tomography (CBCT), fusion imaging and ablation volume prediction in patients with hepatocellular carcinoma unsuitable for standard ultrasound (US) guidance. MATERIALS AND METHODS: this study included all patients with HCC treated with MWA between January 2021 and June 2022 in a tertiary institution. Patients were divided into two groups: Group A, treated following the protocol, and Group B, treated with standard ultrasound (US) guidance. Follow-up images were reviewed to assess residual disease (RD), local tumor progression (LTP) and intrahepatic distant recurrence (IDR). Ablation response at 1 month was also evaluated according to mRECIST. Baseline variables and outcomes were compared between the groups. For 1-month RD, propensity score weighting (PSW) was performed. RESULTS: 80 consecutive patients with 101 HCCs treated with MWA were divided into two groups. Group A had 41 HCCs in 37 patients, and Group B had 60 HCCs in 43 patients. Among all baseline variables, the groups differed regarding their age (mean of 72 years in Group A and 64 years in Group B, respectively), new vs. residual tumor rates (48% Group A vs. 25% Group B, p < 0.05) and number of subcapsular tumors (56.7% Group B vs. 31.7% Group A, p < 0.05) and perivascular tumors (51.7% Group B vs. 17.1% Group A, p < 0.05). The protocol led to repositioning the antenna in 49% of cases. There was a significant difference in 1-month local response between the groups measured as the RD rate and mRECIST outcomes. LTP rates at 3 and 6 months, and IDR rates at 1, 3 and 6 months, showed no significant differences. Among all variables, logistic regression after PSW demonstrated a protective effect of the protocol against 1-month RD. CONCLUSIONS: The use of CBCT, fusion imaging and ablation volume prediction during percutaneous MWA of HCCs provided a better 1-month tumor local control. Further studies with a larger population and longer follow-up are needed.

HIV Prevalence among Pregnant Women in Brazil: A National Survey / Prevalência de HIV em grávidas brasileiras: pesquisa nacional

Abstract Background This study was conducted to determine the seroprevalence of HIV among pregnant women in Brazil and to describe HIV testing coverage and the uptake of antenatal care (ANC). Methods Between October 2010 and January 2012, a probability sample survey of parturient women aged 15-49 years who visited public hospital delivery services in Brazil was conducted. Data were collected from prenatal reports and hospital records. Dried blood spot (DNS) samples were collected and tested for HIV.We describe the agespecific prevalence of HIV infection and ANC uptake with respect to sociodemographic factors. Results Of the 36,713 included women, 35,444 (96.6%) were tested for HIV during delivery admission. The overall HIV prevalence was of 0.38% (95% confidence interval [CI]: 0.31-0.48), and it was highest in: the 30 to 39 year-old age group (0.60% [0.40- 0.88]), in the Southern region of Brazil (0.79% [0.59-1.04]), among women who had not completed primary (0.63% [0.30-1.31]) or secondary (0.67% [0.49-0.97]) school education, and among women who self-reported as Asian (0.94% [0.28-3.10]). The HIV testing coverage during prenatal care was of 86.6% for one test and of 38.2% for two tests. Overall, 98.5% of women attended at least 1 ANC visit, 90.4% attended at least 4 visits, 71% attended at least 6 visits, and 51.7% received ANC during the 1st trimester. HIV testing coverage and ANC uptake indicators increased with increasing age and education level of education, and were highest in the Southern region. Conclusions Brazil presents an HIV prevalence of less than 1% and almost universal coverage of ANC. However, gaps in HIV testing and ANC during the first trimester challenge the prevention of the vertical transmission of HIV. More efforts are needed to address regional and social disparities.

Introdução Este estudo foi realizado com o objetivo de determinar a soroprevalência do HIV entre as mulheres grávidas no Brasil e descrever a cobertura de exames de HIV e a integração dos cuidados pré-natais (CPN). Métodos Entre outubro de 2010 e janeiro de 2012, foi realizada uma pesquisa de probabilidade por amostragem direcionada a mulheres grávidas com idade entre 15 e 49 anos, que utilizaram serviços de parto em hospitais públicos do Brasil. Os dados foram coletados a partir de relatórios pré-natais e registros hospitalares. Amostras de sangue foram coletadas e submetidas a exames de HIV. Descrevemos a prevalência da infecção pelo HIV específica de acordo com a idade e a absorção dos CPN em relação a fatores demográficos. Resultados Das 36.713 mulheres incluídas, 35.444 (96,6%) foram submetidas a exames de HIV durante a admissão para o trabalho de parto. A prevalência global de HIV foi de 0,38% (intervalo de confiança [IC] de 95%: 0,31-0,48), e foi maior no grupo com a faixa etária entre 30 e 39 anos de idade (0,60% [0,40-0,88]), da região Sul (0,79% [0,59-1,04]), entre as mulheres com o ensino fundamental incompleto (0,63% [0,30-1,31]) ou ensino médio incompleto (0,67% [0,49-0,97]), e entre as mulheres que se identificam como asiáticas (0,94% [0,28-3,10]). A cobertura do exame de HIV durante os CPN foi de 86,6% para um exame e de 38,2% para dois exames. No geral, 98,5% das mulheres foram atendidas em pelo menos 1 consulta de CPN, 90,4% compareceram a pelo menos 4 consultas, 71% compareceram a pelo menos 6 visitas, e 51,7% receberam CPN durante o 1o trimestre. A cobertura de exames de HIV e os indicadores de captação de CPN aumentaram de forma proporcional ao aumento da idade e do nível de educação, e foram maiores na região Sudeste. Conclusões O Brasil apresenta uma prevalência de menos de 1% e cobertura praticamente universal de CPN. No entanto, as lacunas nos exames de HIV e CPN durante o primeiro trimestre representam um desafio à prevenção contra a transmissão vertical do HIV. São necessários mais esforços a fim de reduzir as disparidades regionais e sociais.