[Critical points to implement an antibiotic form for management of surgical wound infection]. / Puntos críticos para implementar un formulario de antibióticos para el manejo de infección de herida quirúrgica.

Background: Surgical site infection (SSI) is a major complication of surgical procedures and contributes to morbidity, mortality, and healthcare costs. It is commonly caused by Gram-negative bacteria and should be monitored in hospital units. Objective: To identify critical points to implement an antibiotic form for surgical wound infection management. Material and methods: Descriptive observational study in 100 cultures of wounds with SSI. The most common diagnosis, the microorganism involved, sensitivity to antibiotics and prescription consistency were identified. In addition, demographic variables were assessed and a questionnaire was applied to surgeons in order to identify the critical points to implement a local formulary of antibiotics. Results: 37% of cultures came from female patients. The most common diagnosis was hollow viscus perforation in 31%. The most common microorganism was Escherichia coli ESBL in 20% and 55% of these were sensitive to imipenem. The critical points observed were consistency in the prescription of antimicrobials, which reached only 29%, and that surgeons did not actively participate in strategies for the rational use of antibiotics. Conclusions: As a critical point to implement the antibiotic form, little involvement of surgeons with the hospital infection control team was found. The incidence of SSI was 2.4%, predominantly in emergency surgery. The presence of E. coli ESBL is frequent, with resistance to broad-spectrum antimicrobials.

Introducción: las infecciones del sitio quirúrgico (ISQ) son una complicación importante de los procedimientos quirúrgicos y contribuyen a la morbilidad, la mortalidad y los costos sanitarios. Comúnmente son causadas por bacterias Gram-negativas y deben ser monitoreadas en las unidades hospitalarias. Objetivo: identificar puntos críticos para implementar un formulario de antibióticos para el manejo de infección de herida quirúrgica. Material y métodos: estudio observacional descriptivo en 100 cultivos de heridas con ISQ. Se identificó el diagnóstico más común, el microorganismo involucrado, la sensibilidad a los antibióticos y la congruencia de la prescripción. Además, se evaluaron variables demográficas y se aplicó un cuestionario a cirujanos para identificar los puntos críticos para implementar un formulario local de antibióticos. Resultados: el 37% de los cultivos procedieron de pacientes mujeres. El diagnóstico más común fue perforación de víscera hueca en el 31%. El microrganismo más común fue Escherichia coli BLEE en el 20% y el 55% de estos fueron sensibles a imipenem. Los puntos críticos observados fueron la congruencia en la prescripción de antimicrobianos que alcanzó solo 29% y que los cirujanos no participaron activamente en las estrategias del uso razonado de antibióticos. Conclusiones: como punto crítico para implementar el formulario de antibióticos se encontró poca participación de los cirujanos con el equipo hospitalario de control de infecciones. La incidencia de ISQ fue del 2.4% y preedominaron en la cirugía de urgencia. La presencia de E. coli BLEE es frecuente, con resistencia en antimicrobianos de amplio espectro.

Factores asociados con la recidiva de cáncer de mama en pacientes con cirugía conservadora / Factors associated with breast cancer recurrence in patients with conservative surgery

Resumen OBJETIVO: Identificar los factores asociados con la recidiva de cáncer de mama en pacientes con cirugía conservadora. MATERIALES Y MÉTODOS: Estudio observacional, de cohorte retrospectiva, efectuado a partir de expedientes de pacientes con cáncer de mama en estadios tempranos e intervenidas con cirugía conservadora. Parámetros de estudio: estadio, subtipo histológico, perfil de expresión de receptores hormonales, tiempo de seguimiento, recidiva y periodo libre de enfermedad. La tasa de recidiva, el periodo libre de enfermedad y la identificación de los factores asociados con recidiva se hicieron con análisis estadístico. RESULTADOS: Se estudiaron 53 pacientes con edad media de 51.0 ± 9.4 años. El subtipo histopatológico más frecuente fue el ductal en 49 de las 53 pacientes; en 48 de ellas los tumores fueron positivos para receptores de progesterona, en 7 de 53 para Her-2 y en 3 de 53 triple negativo. La tasa de recidiva de cáncer de mama fue de 13.2% (es decir: 7 de 53 pacientes). El tiempo libre de enfermedad en quienes recayeron fue de 30.6 ± 24.8 meses. En el análisis bivariado se asociaron significativamente con recidiva: los ganglios linfáticos positivos, la expresión de receptores de progesterona y de estrógenos, los tumores triple negativo y el tratamiento complementario con quimioterapia. En el análisis multivariado solo se asociaron con recidiva: tener un tumor triple negativo (OR = 51.8; IC95%: 4.9- 548.4; p = 0.001) y recibir quimioterapia (OR = 8.0; IC95%: 1.4-46.1; p = 0.020). CONCLUSION: Los factores asociados con la recidiva fueron los ganglios linfáticos positivos, la expresión de receptores de progesterona y de estrógenos, tumores triple negativo y recibir quimioterapia.

Abstract OBJECTIVE: To identify factors associated with breast cancer recurrence in patients undergoing conservative surgery. MATERIALS AND METHODS: Observational, retrospective cohort study conducted on the records of patients with early-stage breast cancer who underwent conservative surgery. Study parameters: stage, histologic subtype, hormone receptor expression profile, follow-up time, recurrence and disease-free period. Statistical analysis was performed to estimate recurrence rate and disease-free period and to identify factors associated with recurrence. RESULTS: Fifty-three patients with a mean age of 51.0 ± 9.4 years were evaluated. The most common histopathologic subtype was ductal in 49 of 53 patients; tumors were progesterone receptor positive in 48, Her-2 positive in 7 of 53, and triple negative in 3 of 53. The breast cancer recurrence rate was 13.2% (i.e., 7 of 53 patients). Disease-free time in those who relapsed was 30.6 ± 24.8 months. In bivariate analysis, positive lymph nodes, progesterone and estrogen receptor expression, triple-negative tumors, and adjuvant chemotherapy were significantly associated with recurrence. In multivariate analysis, only having a triple-negative tumor (OR = 51.8; 95%CI: 4.9-548.4; p = 0.001) and receiving chemotherapy (OR = 8.0; 95%CI: 1.4-58.4; p = 0.001) were associated with recurrence. CONCLUSION: Factors associated with recurrence were positive lymph nodes, expression of progesterone and estrogen receptors, triple-negative tumors, and receipt of chemotherapy.

Tiempo de espera para el diagnóstico final de BI-RADS 4 y 5 / Waiting time for the final diagnosis of BI-RADS 4 and 5

Resumen Objetivo: Medir el tiempo de espera en otorgar un diagnóstico final a las derechohabientes con BIRADS 4 y 5 de 40 a 69 años, en el Hospital General de Zona, Medicina Familiar No.1 en La Paz, Baja California Sur, México. Material y métodos: Estudio observacional, descriptivo, con la revisión de 36 registros de control de mastografías del área de radiología, con resultados de BI-RADS 4 y 5. Se midieron variables demográficas y los tiempos de espera del proceso desde la solicitud de la mastografía hasta el diagnóstico final. Se realizó estadística descriptiva. Estudio considerado sin riesgo de acuerdo a la Ley General de Salud. Fue autorizado por los comités de ética e investigación de la unidad hospitalaria. Resultados: Se analizaron un total de 36 expedientes de tamizaje en mujeres entre los 40 y los 69 años, con una media de 51.86 + 8.28 años. El promedio de días trascurridos desde la solicitud de la mastografía hasta el diagnóstico final fue 125.05 + 66.23. En el 13.9% de los casos, se logró concluir el proceso diagnóstico en el tiempo normalmente previsto; para el 86.1% restante, se necesitó un tiempo mayor a 30 días para concluir el protocolo diagnóstico. Las causas del tiempo prolongado fueron atribuibles a la demora en la atención en segundo nivel, (consulta de especialidades y área de patología). Conclusiones: Se necesita generar estrategias en todos los pasos del proceso, para asegurar que se cumpla con el tiempo de espera normado en flujograma, tanto en primero como en el segundo nivel de atención; para mejorar el pronóstico de pacientes con cáncer de mama.

Abstract Objective: To measure the waiting time in granting a final diagnosis to the rights holders with BI RADS 4 and 5 from 40 to 69 years old, in the General Hospital of the Zone + Family Medicine No.1 in La Paz, Baja California Sur, Mexico. Material and methods: Observational, descriptive study, with the review of 36 mammography control records from the radiology area, with BI RADS 4 or 5 results. Demographic variables and waiting times for the process were measured from mammography request until the final diagnosis. Descriptive statistics were performed. Study considered without risk according to the General Health Law. It was authorized by the ethics and research committees of the hospital unit. Results: A total of 36 screening files were analyzed in women between 40 and 69 years old, with a mean of 51.86 + 8.28 years. The average number of days elapsed from the request for the mammography to the final diagnosis was 125.05 + 66.23. In 13.9% of the cases, the diagnostic process was concluded in the normal scheduled time; for the remaining 86.1%, it took more than 30 days to complete the diagnostic protocol. The causes of the prolonged time were attributable to the delay in care at the second level (consultation of specialties and pathology area). Conclusions: It is necessary to generate strategies in all the steps of the process, to ensure that the waiting time regulated in the flowchart is complied with, both in the first and second level of care; to improve the prognosis of patients with breast cancer.

[Comparison of the Pap smear with conventional technique versus modified technique]. / Comparación del Papanicolau con técnica convencional frente a técnica modificada.

Background: Despite the fact that the Papanicolaou technique is the most effective method of prevention and detection of cervical cancer, the precision of this tool remains controversial; Because of this, there are medical and scientific efforts to improve the quality of the procedure. Objective: Compare the quality of sampling between the conventional and modified technique. Material and methods: Descriptive and comparative observational study in 150 cervical cytology samples (75 conventional technique samples and 75 in modified technique) in women aged 25 to 64 years. Demographic variables, characteristics of the cervix and quality of the sample were analyzed. Descriptive statistics and association measures were performed. Study with risk greater than the minimum. All participants signed an informed consent. Results: The quality of the sample was satisfactory in 92.0% for the conventional technique vs 89.3% for the modified technique. The main cause of unsatisfactory samples was insufficient cellularity 6.7% in conventional technique vs 12% of the modified technique, with no significant difference between both techniques p = 0.575 (1.37; 0.45-4.1), findings that reject the working hypothesis. Conclusions: There was no significant difference when using both tests, the samples with satisfactory quality were similar between both techniques.

Introducción: a pesar de que la técnica de papanicolaou es el método más eficaz para la prevención y detección del cáncer cervicouterino, la precisión de esta herramienta sigue siendo controversial; debido a esto, existen esfuerzos médicos y científicos para mejorar la calidad del procedimiento. Objetivo: comparar la calidad en la toma de muestra entre la técnica convencional y la modificada. Material y métodos: estudio observacional descriptivo y comparativo en 150 muestras de citología cervical (75 muestras técnica convencional y 75 en técnica modificada) en mujeres de 25 a 64 años. Se analizaron variables demográficas, características del cérvix y calidad de la muestra. Se realizó estadística descriptiva y medidas de asociación. Estudio con riesgo mayor que el mínimo. Todas las participantes firmaron consentimiento informado. Resultados: la calidad de la muestra fue satisfactoria en el 92% para la técnica convencional frente al 89.3% para la técnica modificada. La causa principal de muestras insatisfactorias fue la celularidad insuficiente, la cual se presentó en el 6.7% de las muestras con técnica convencional frente al 12% de la técnica modificada, sin diferencia significativa entre ambas técnicas p = 0.575 (1.37; 0.45-4.1), hallazgos que rechazan la hipótesis de trabajo. Conclusiones: no hubo diferencia significativa al utilizar ambas pruebas, las muestras con calidad satisfactoria fueron similares entre ambas técnicas.

Comparación del Papanicolau con técnica convencional frente a técnica modificada / Comparison of the Pap smear with conventional technique versus modified technique

Introducción: a pesar de que la técnica de papanicolaou es el método más eficaz para la prevención y detección del cáncer cervicouterino, la precisión de esta herramienta sigue siendo controversial; debido a esto, existen esfuerzos médicos y científicos para mejorar la calidad del procedimiento. Objetivo: comparar la calidad en la toma de muestra entre la técnica convencional y la modificada. Material y métodos: estudio observacional descriptivo y comparativo en 150 muestras de citología cervical (75 muestras técnica convencional y 75 en técnica modificada) en mujeres de 25 a 64 años. Se analizaron variables emográficas, características del cérvix y calidad de la muestra. Se realizó estadística descriptiva y medidas de asociación. Estudio con riesgo mayor que el mínimo. Todas las participantes firmaron consentimiento informado. Resultados: la calidad de la muestra fue satisfactoria en el 92% para la técnica convencional frente al 89.3% para la técnica modificada. La causa principal de muestras insatisfactorias fue la celularidad insuficiente, la cual se presentó en el 6.7% de las muestras con técnica convencional frente al 12% de la técnica modificada, sin diferencia significativa entre ambas técnicas p = 0.575 (1.37; 0.45-4.1), hallazgos que rechazan la hipótesis de trabajo. Conclusiones: no hubo diferencia significativa al utilizar ambas pruebas, las muestras con calidad satisfactoria fueron similares entre ambas técnicas.

Background: Despite the fact that the Papanicolaou technique is the most effective method of prevention and detection of cervical cancer, the precision of this tool remains controversial; Because of this, there are medical and scientific efforts to improve the quality of the procedure. Objective: Compare the quality of sampling between the conventional and modified technique. Material and methods: Descriptive and comparative observational study in 150 cervical cytology samples (75 conventional technique samples and 75 in modified technique) in women aged 25 to 64 years. Demographic variables, characteristics of the cervix and quality of the sample were analyzed. Descriptive statistics and association measures were performed. Study with risk greater than the minimum. All participants signed an informed consent. Results: The quality of the sample was satisfactory in 92.0% for the conventional technique vs 89.3% for the modified technique. The main cause of unsatisfactory samples was insufficient cellularity 6.7% in conventional technique vs 12% of the modified technique, with no significant difference between both techniques p = 0.575 (1.37; 0.45-4.1), findings that reject the working hypothesis. Conclusions: There was no significant difference when using both tests, the samples with satisfactory quality were similar between both techniques.

Beneficios obtenidos con la consulta de teledermatología en Guerrero Negro, Baja California Sur / Benefits obtained with the tele dermatology consultation in Guerrero Negro, Baja California Sur

Resumen: Objetivo: Identificar y describir los beneficios en ahorro logrado y tiempo diferido de duración por teleconsulta de dermatología, en pacientes atendidos en Guerrero Negro, Baja California Sur. Materiales y métodos: Estudio observacional de costos unitarios. Se revisaron 58 expedientes de pacientes atendidos en la teleconsulta de dermatología en Guerrero Negro. Se analizaron variables demográficas, motivo de atención, unidad de referencia y los indicadores de ahorro logrado y tiempo de espera. Este estudio fue clasificado sin riesgo y se autorizó por el comité de ética e investigación. Resultados: El 81.6% fueron mujeres, predominó el grupo de edad de 31 a 50 años en el 29.3% de los casos, de acuerdo a la ocupación, predominaron las amas de casa en un 24.1%, el principal diagnóstico fue la dermatosis, el 50% de los casos pertenecían a la Unidad de Medicina familiar número 35. El tiempo real para obtener una teleconsulta versus consulta presencial fue de 638.50 + 879.05 versus 1,165.71+ 671.69 horas (p=0.000; IC 95% 0.000 - 0.050). Se comparó el costo en pesos mexicanos del traslado de la teleconsulta versus consulta presencial $302.08 ± 695.62 versus $5,014±$5,377.28 (p=0.003 IC 95% 0.000 - 0.050). Conclusiones: En este trabajo se muestra que el uso de la tecnología de la información y comunicación son útiles al servicio de la salud. Existe beneficio en los indicadores que se midieron: tiempo diferido de la consulta al obtener una consulta en máximo 10 días, al comparar de 45 a 60 días para una atención presencial, además del ahorro logrado en los costos unitarios al tener un gasto máximo de $302.00 pesos por concepto de traslado de las unidades periféricas a Guerrero Negro, comparado con $5,014.00 necesarios para acudir a la consulta presencial.

Abstract: Objective: Identify and describe the benefits in savings achieved and deferred duration of dermatology teleconsultation in patients treated in Guerrero Negro, Baja California Sur. Materials and methods: Observational study of unit costs. Fifty-eight files of patients treated at the dermatology teleconsultation in Guerrero Negro were reviewed. Demographic variables, reason for care, unit of reference, and indicators of savings achieved and waiting time were analyzed. This study was classified without risk and was authorized by the ethics and research committee. Results: 81.6% were women, the age group of 31 to 50 years prevailed in 29.3% of cases, according to occupation, housewives predominated in 24.1%, the main diagnosis was dermatosis, 50% of the cases belonged to Family Medicine Unit number 35. The real time to obtain a tele consultation versus face-to-face consultation was 638.50 + 879.05 versus 1.165.71 + 671.69 hours (p = 0.000; 95% CI 0.000 - 0.050). The costin Mexican pesos of the transfer of teleconsultation versus face-to-face consultation was $ 302.08 ± 695.62 versus $ 5,014 ± $ 5,377.28 (p = 0.003 95% CI 0.000 - 0.050). Conclusions: This work shows that the use of information and communication technology is useful in the service of health. There is benefit in the indicators that were measured: deferred time of the consultation when obtaining a consultation in a maximum of 10 days, when comparing 45 to 60 days for face-to-face care, in addition to the savings achieved in unit costs by having a maximum expenditure of $302.00 pesos for the transfer of peripheral units to Guerrero Negro, compared to the $ 5,014.00 needed to attend the face-to-face consultation.

Effects of Oral Pirfenidone on Colon Anastomosis Healing and Adhesion Formation in Rats.

INTRODUCTION: Many experimental studies have examined multiple drugs or treatments to improve the healing of intestinal anastomoses. Synthetic prostacyclin analogs, immunosuppressants, erythropoietin, growth hormone, insulin-like growth factor type 1, synthetic metalloproteinases inhibitors, and hyperbaric oxygen therapy have produced promising results in low-risk models of anastomosis dehiscence. However, in high-risk models, only hyperbaric oxygen therapy has been shown to be useful. Pirfenidone (PFD), a commonly used antifibrosing drug, has not been shown to be effective for this purpose. Our objective was to evaluate the effects of PFD on anastomosis healing and adhesion genesis in a low-risk rat model of dehiscence of colonic anastomosis. METHODS: An experimental study was conducted on 40 healthy Wistar rats randomly assigned to the control group or PFD experimental group (20 rats in each group). Colon anastomosis was performed 3 cm above the peritoneal reflection using the same technique in all animals. Mechanical resistance was studied by measuring bursting pressure. Adhesions were evaluated macroscopic and histologically using common staining techniques. Animals received the first PFD dose 12 h after surgery at a dose of 500 mg/kg one a day (SID) for 5 consecutive days. On day 6, the animals were reoperated on to measure the bursting pressure in situ and to classify adhesions macroscopically, and the anastomosed colon was resected for histological analysis. RESULTS: There were no deaths, complications, or anastomosis dehiscence in either group. The mean bursting pressure was 120.8 ± 11 mm Hg and 135.5 ± 12.4 in the control and PFD groups, respectively (p < 0.001). The adhesions were less dense and had less inflammatory cell infiltration in the PFD group (p < 0.02 and 0.002, respectively). Collagen content was slightly higher in the PFD group (p = 0.04). CONCLUSIONS: Our results revealed favorable effects of PFD in this low-risk colon anastomosis model; for example, the bursting pressure was higher, and the macroscopic adhesions were soft and exhibited less inflammatory infiltration and higher collagen content in the PFD group than in the control group. The results showing that PFD treatment was associated with better healing of minor adhesions seem to be paradoxical because the therapeutic indications for this drug are directed at treating fibrosing diseases.

Differences in Postoperative Pain, Nausea, and Vomiting After Elective Laparoscopic Cholecystectomy in Premenopausal and Postmenopausal Mexican Women.

BACKGROUND: Postoperative symptoms and pain after laparoscopic cholecystectomy (LC) are common in women. However, there is no evidence of differences in incidence and severity among different age groups. We evaluated whether adverse postoperative symptoms were more common in younger than in older women after LC. METHODS: One hundred and fifty premenopausal (mean age 37.6 ± 3.6 y) and 145 postmenopausal women (59 ± 5.2 y) were included in this retrospective cohort study. Clinical and anthropometric parameters were analyzed. Study endpoints were the incidences of postoperative nausea and vomiting (PONV) and pain, and the additional analgesics and antiemetics needed after surgery. RESULTS: Body mass index was normal in 42.7% of patients in the younger group and 64.8% in the older group (P < 0.001). Reported pain was more frequent and intense in the younger group throughout the study period (P < 0.01). Additional narcotics were required in 18% of premenopausal versus 7.6% of postmenopausal women (P = 0.001), and the doses used to reduce pain were higher for premenopausal women (P = 0.02). PONV was more frequent in the younger group at 1 and 6 h after surgery (P < 0.005). Rescue antiemetics were required in 29 premenopausal and 13 postmenopausal women (P = 0.01). Hospital stay was shorter for the older patients (P = 0.01). Minor morbidity was observed in both groups (0.7% and 2.1%). There was no mortality. CONCLUSIONS: Early PONV and pain after LC were more frequent in premenopausal women, who also required more rescue analgesic and antiemetic medication.

Effects of Oral Zafirlukast, Sildenafil, or Pirfenidone on the Formation of Postsurgical Intra-Abdominal Adhesions in an Experimental Rat Model.

INTRODUCTION: Intra-abdominal adhesions' main etiology is surgical procedures that commonly require reintervention. Oral treatments with sildenafil, zafirlukast, and pirfenidone have yielded decreased severity of fibrotic phenomena secondary to the introduction of foreign material. This study aimed to evaluate the efficacy of oral zafirlukast, sildenafil, or pirfenidone treatment on reducing or preventing intra-abdominal adhesions in an experimental rat model. METHODS: Four groups, each of 10 male Wistar rats weighing 250-300 g, were used. A midline laparotomy was used to excise an area of 1.5 × 1.5 cm and reconstructed with polypropylene mesh fixed to the abdominal wall. After 12 h, oral doses of zafirlukast (1.25 mg/kg, group B), sildenafil (15 mg/kg, group C), or pirfenidone (500 mg/kg, group D) were given every day for 8 days. The control group, A, received no treatment. At day 9, animals were reoperated. The implant was resected after ethically approved euthanasia, and specimens were fixed in 10% formaldehyde for histopathology. RESULTS: Control group A yielded adhesions with greater fibrovascular density and neighboring organ involvement than the other groups (p = 0.001), as well as intense inflammatory infiltrates and numerous granulomas (p = 0.04). Adhesions in group C had less fibrovascular density (p = 0.03) with decreased serosal injuries (p = 0.001) and less organ involvement. Group D had reduced adhesions without organ involvement (p < 0.01) and less inflammatory infiltrates, collagen fibers, and foreign body granulomas than group B or C (p < 0.01). CONCLUSIONS: Oral administration of these agents did not prevent adhesions but ameliorated them. Oral pirfenidone offered the best performance and could be recommended for human use.

Substance Use and Psychological Distress in Mexican Adults during COVID-19 Pandemic: A Cross-Sectional Study.

OBJECTIVES: This observational cross-sectional study examined changes in substance use during the coronavirus disease 2019 (COVID-19) pandemic in the Mexican population and evaluated whether depression or anxiety was associated with these new consumption patterns. METHODS: An online survey was distributed to the general population. Participants were questioned about their demographics, situation during the COVID-19 pandemic, and substance consumption patterns. The Patient Health Questionnaire-9 for depression and the Coronavirus Anxiety Scale were used. RESULTS: A total of 866 individuals completed the survey. The mean scores for the Patient Health Questionnaire-9 and Coronavirus Anxiety Scale were 8.89 ± 6.20 and 3.48 ± 3.22, respectively. The preferred substances were alcohol (19%), tobacco (16.5%), and marijuana (5.6%). Consumption of alcohol (p = 0.042) significantly increased during the pandemic and it was higher in women than in men (p = 0.040). CONCLUSIONS: Substance use patterns were affected by the pandemic, with an increase in the number of users and consumption rate, as well as the reported psychiatric symptoms.

Antecedentes de vacunación en pacientes con COVID-19 / COVID-19 patients and vaccination

Introduction: Vaccines against COVID-19 are effective. However, a percentage of people with a complete vaccination scheme are at risk of contracting and becoming ill from COVID-19. These cases are known as "vaccinated cases of infection". Objective: To identify the clinical characteristics of patients with SARS-CoV-2 infection with a history of vaccination for COVID-19. Methods: Retrospective cohort study in 271 vaccinated and positive patients who attended medical units in Baja California Sur, with or without a complete scheme and registered in SINOLAVE. Clinical characteristics, management, sequelae and mortality were analyzed. Descriptive statistics and association measures were used. Authorized by the ethics and research committees. Results: Age 48.5 ± 12.1 years, 19.5% met the definition of infection in vaccinated, 93% with outpatient management, 3.7% mortality, the most frequent comorbidity: diabetes / hypertension. 92% of the cases vaccinated with Cansino had COVID, followed by Pfizer with 26%. There is a higher risk of hospitalization and mortality in patients with an incomplete scheme. Conclusions: The vaccines are effective, most of the cases were ambulatory. Patients vaccinated with Cansino showed a higher COVID infection, the reinforcement of this vaccine could reduce the disease in patients already vaccinated. Of the patients who died, the majority did not have a complete vaccination schedule.

Introducción: Las vacunas contra la COVID-19 son efectivas. Sin embargo, un porcentaje de personas con esquema completo de vacunación tiene riesgo de contagiarse y enfermar por COVID-19. Estos casos se conocen como "casos de infección en vacunados". Objetivo: Identificar las características clínicas de los pacientes con infección por SARS-COV-2 con antecedente de vacunación para COVID-19.Métodos: Estudio de cohorte retrospectivo con 271 vacunados y positivos que acudieron a las unidades médicas en Baja California Sur, con esquema completo o sin él y registrados en el SINOLAVE. Se analizaron características clínicas, manejo, secuelas y mortalidad. Se utilizó estadística descriptiva y medidas de asociación. El estudio fue autorizado por los comités de ética e investigación. Resultados: Edad: 48.5 ± 12.1 años; 19.5% cumplieron con la definición de infección en vacunados; 93% con manejo ambulatorio; mortalidad del 3.7%; la comorbilidad mas frecuente: diabetes/hipertensión. El 92% de los casos vacunados con Cansino presentaron COVID, seguido por los que recibieron Pfizer, con el 26%. Existe mayor riesgo de hospitalización y mortalidad en pacientes con esquema incompleto. Conclusiones: las vacunas son efectivas, la mayoría de los casos fueron ambulatorios. Los pacientes vacunados con Cansino mostraron mayor infección por SARS-CoV-2; el refuerzo de esta vacuna, podría disminuir la enfermedad en los pacientes ya vacunados. De los pacientes que murieron, la mayoría no tenía esquema completo de vacunación.

Isquemia mesentérica segmentaria como secuela de la COVID-19: Informe de un caso / Segmental mesenteric ischemia as a sequel to COVID-19: A case report

Coronaviruses can cause respiratory, gastrointestinal, and central nervous system diseases in humans and animals, have the ability to adapt through mutations, and are programmed to modify host tropism. SARS-CoV-2 infection (COVID-19) has been shown to be a highly thrombogenic disease, generating deep vein thrombosis, pulmonary embolism and acute ischemia, in patients even without previous pathology. Coronaviruses can cross the species barrier and infect humans with unexpected consequences for public health. The transmission rate of SARS-CoV-2 is higher compared to that of closely related SARS-CoV infections. Key residues of the spike protein have a higher binding affinity for ACE2. These may be the reason for the higher transmission rate of SARS-CoV-2. COVID-19 has been shown in some patients to be a highly thrombogenic disease, both venous and arterial, generating deep vein thrombosis, pulmonary embolism and acute ischemia, both in patients without previous pathology as with them.There is molecular evidence of the state of hyper coagulability in COVID-19; the first observations were made by Wang, in 2020, when analyzing the levels of fibrinogen and D-dimer in patients with COVID-19 and finding elevated levels up to 75% above the laboratory controls. We present the case of a 62-year-old male with mild symptoms of COVID-19 and outpatient management, at the end of the clinical disease he presented an acute abdomen secondary to mesenteric ischemia, with good postoperative evolution.

Los coronavirus pueden causar enfermedades respiratorias, gastrointestinales y del sistema nervioso central en seres humanos y animales; tienen la capacidad para adaptarse por medio de mutaciones y son programados para modificar el tropismo del huésped. La infección por el SARS-CoV-2 (COVID-19) genera trombosis venosa profunda, embolismo pulmonar y cuadros de isquemia aguda, en pacientes sin afección previa. Los coronavirus infectan a los seres humanos con consecuencias inesperadas para la salud pública. La tasa de transmisión de la infección por el SARS-CoV-2 es más alta en comparación con las infecciones por SARS-CoV estrechamente relacionadas. Los residuos clave de la proteína espiga tienen mayor afinidad de unión por el receptor de la enzima convertidora de angiotensina (ECA2). Esta puede ser la razón de la mayor tasa de transmisión de SARS-CoV-2. La COVID-19 ha demostrado, en algunos pacientes, ser una enfermedad altamente trombogénica, tanto venosa como arterial, dado que genera trombosis venosa profunda, embolismo pulmonar y cuadros de isquemia aguda, tanto en pacientes sin afecciones previas como con ellas. Existe evidencia molecular del estado de hipercoagulabilidad en la COVID-19; las primeras observaciones fueron realizadas por Wang en 2020, al analizar los niveles de fibrinógeno y dímero-D en pacientes con COVID-19, y encontrar niveles elevados hasta 75% por arriba de los controles de laboratorio. Se presenta el caso de un paciente masculino de 62 años, con un cuadro leve de COVID-19 y abordaje ambulatorio; al término de la enfermedad clínica presentó abdomen agudo secundario a isquemia mesentérica, con buena evolución en el posoperatorio.

Disminución del índice de masa corporal al sustituir bebidas endulzadas por agua simple / Decrease in body mass index when substituting sweetened beverages for plain water

Background: Health professionals recommend increasing your water intake, to 8 cups per day to reduce weight. Despite the widespread adoption of this advice, the evidence for its efficacy is limited. Objective: To evaluate the substitution of sweetened beverages for plain water as an intervention to decrease the body mass index (BMI) in health workers. Materials and methods: An analytical, quasi-experimental, longitudinal and prospective study was carried out at the HGZ MF #1 from October 15, 2019 to April 15, 2020. A collection instrument was developed to collect information to evaluate water intake in IMSS workers, recommending the consumption of simple water at 8 cups per day and determined anthropometric measurements at the beginning and at the end of the study. Results: Data collection was carried out on 150 healt workers who agreed to participate. The age was 40.1 ± 8.4 years, with a greater distribution in women with 60.0%, the majority belonged to the morning shift (46.0%). After the intervention, we found that only 9.3% had an intake of less than 1 l/day, 23.3% from 1 to 1.5 l/day, and 67.3% had the recommended intake of 1.6 to 2 l/day. The initial weight was 87.0 ± 17.4 kilograms vs. 84.1 ± 15.4 kilograms at the end. For its part, the initial BMI was 31.1±4.8 kg/m2 and the final BMI was 30.1 ± 4.4 kg/m2 . Inferential analysis using the test of differences for paired samples identified a statistically significant difference in favor of the intervention for BMI with a mean reduction of 1.004 kg/m2 (95% CI 0.776-1.232, p < 0.001). Conclusions: The substitution of sweetened beverages for plain water as an intervention to decrease the BMI in IMSS workers with statistically significant results that adopt our working hypothesis.

Antecedentes: Los profesionales de la salud recomiendan aumentar el consumo de agua a 8 tazas por día para reducir el peso. A pesar de la adopción de este consejo, la evidencia de su eficacia es limitada. Objetivo: Evaluar la sustitución de bebidas edulcoradas por agua simple como intervención para disminución del índice de masa corporal (IMC) en trabajadores sanitarios. Materiales y métodos: Se llevó a cabo un estudio analítico, cuasiexperimental, longitudinal y prospectivo, en el Hospital General de Zona / Medicina Familiar N° 1, de La Paz, México, del 15 de octubre de 2019 al 15 de abril de 2020. Se desarrolló un instrumento de recolección para recopilar información para evaluar la ingesta de agua en trabajadores de la salud, recomendando el consumo de agua simple de 8 tazas por día; se determinaron medidas antropométricas al inicio y al final del estudio. Resultados: Se realizó la recolección de los datos de 150 trabajadores del Instituto Mexicano del Seguro Social (IMSS) que aceptaron participar. La edad fue de 40.1 ± 8.4 años, con una distribución mayor en mujeres, con 60.0%; la mayoría pertenecía al turno matutino (46.0%). Luego de la intervención, encontramos que solo el 9.3% tenía ingesta de menos de 1 l/día, el 23.3% de 1 a 1.5 l/día y el 67.3% presentó la ingesta recomendada de 1.6 a 2 l/día. El peso inicial fue de 87.0 ± 17.4 kg vs. 84.1 ± 15.4 kg al final. Por su parte, el IMC inicial fue 31.1 ± 4.8 kg/m2 y final de 30.1 ± 4.4 kg/m2 . El análisis inferencial mediante la prueba de diferencias para muestras emparejadas identificó una diferencia estadísticamente significativa en favor de la intervención para el IMC, con una reducción media de 1.004 kg/m2 (IC 95%: 0.776 a 1.232, p < 0.001). Conclusiones: La sustitución de bebidas edulcoradas por agua simple como intervención para disminución del IMC en trabajadores del IMSS, logró resultados estadísticamente significativos, que confirman nuestra hipótesis de trabajo.

Effect of a preoperative single-dose steroid on pulmonary function and postoperative symptoms after modified radical mastectomy: results of a randomized clinical trial.

BACKGROUND: Evidence suggests that a preoperative single-dose steroid improves lung function and decreases the incidence of postoperative symptoms; however, this has not been sufficiently proved in modified radical mastectomy for cancer. This study aimed to evaluate the efficacy of preoperative single-dose steroid administration for postoperative lung function and postoperative symptoms in women undergoing modified radical mastectomy for breast cancer. METHODS: In this controlled clinical trial, conducted between June 2014 and October 2018, we examined 81 patients. Patients received a preoperative single dose of 8 mg dexamethasone (n=41; treatment group) or placebo (sterile injectable water; n=40; control group). We obtained data on postoperative nausea and vomiting and pain intensity and performed spirometry 1 h before and 1, 6, 12, and 24 h after surgery. The use of additional analgesic or antiemetic drugs was recorded. We followed up patients 30 days after discharge and recorded any surgical or medical complications. RESULTS: The age distribution and anthropometric variables of the two groups were similar. Almost 50% of the patients in each group also underwent breast reconstruction. In the treatment group, pain intensity was always lower, the incidence of postoperative nausea and vomiting was lower at 6, 12, and 24 h, and additional analgesics or antiemetics were required less frequently (P<0.05 for all). Both treatment and control groups demonstrated a restrictive ventilatory pattern immediately after surgery, which in the treatment group was reversed after 24 h. However, the reconstructed patients had a more intense and prolonged restrictive pattern (P<0.05). Surgical morbidity included one seroma observed in the control group. No infections occurred at the surgical site or at any other level, and no patient developed any metabolic disorder. No mortality was observed in either group. CONCLUSIONS: This study establishes that a single preoperative dose of dexamethasone markedly decreased the incidence of postoperative nausea and vomiting and pain, improved respiratory parameters, and decreased the need for additional postoperative analgesic or antiemetic drugs. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov (ID NCT02305173).

Fibrinogen and thrombin concentrations are critical for fibrin glue adherence in rat high-risk colon anastomoses.

OBJECTIVE: Fibrin glues have not been consistently successful in preventing the dehiscence of high-risk colonic anastomoses. Fibrinogen and thrombin concentrations in glues determine their ability to function as sealants, healers, and/or adhesives. The objective of the current study was to compare the effects of different concentrations of fibrinogen and thrombin on bursting pressure, leaks, dehiscence, and morphology of high-risk ischemic colonic anastomoses using fibrin glue in rats. METHODS: Colonic anastomoses in adult female Sprague-Dawley rats (weight, 250-350 g) treated with fibrin glue containing different concentrations of fibrinogen and thrombin were evaluated at post-operative day 5. The interventions were low-risk (normal) or high-risk (ischemic) end-to-end colonic anastomoses using polypropylene sutures and topical application of fibrinogen at high (120 mg/mL) or low (40 mg/mL) concentrations and thrombin at high (1000 IU/mL) or low (500 IU/mL) concentrations. RESULTS: Ischemia alone, anastomosis alone, or both together reduced the bursting pressure. Glues containing a low fibrinogen concentration improved this parameter in all cases. High thrombin in combination with low fibrinogen also improved adherence exclusively in low-risk anastomoses. No differences were detected with respect to macroscopic parameters, histopathology, or hydroxyproline content at 5 days post-anastomosis. CONCLUSIONS: Fibrin glue with a low fibrinogen content normalizes the bursting pressure of high-risk ischemic left-colon anastomoses in rats at day 5 after surgery.

Fibrinogen and thrombin concentrations are critical for fibrin glue adherence in rat high-risk colon anastomoses

OBJECTIVE: Fibrin glues have not been consistently successful in preventing the dehiscence of high-risk colonic anastomoses. Fibrinogen and thrombin concentrations in glues determine their ability to function as sealants, healers, and/or adhesives. The objective of the current study was to compare the effects of different concentrations of fibrinogen and thrombin on bursting pressure, leaks, dehiscence, and morphology of high-risk ischemic colonic anastomoses using fibrin glue in rats. METHODS: Colonic anastomoses in adult female Sprague-Dawley rats (weight, 250-350 g) treated with fibrin glue containing different concentrations of fibrinogen and thrombin were evaluated at post-operative day 5. The interventions were low-risk (normal) or high-risk (ischemic) end-to-end colonic anastomoses using polypropylene sutures and topical application of fibrinogen at high (120 mg/mL) or low (40 mg/mL) concentrations and thrombin at high (1000 IU/mL) or low (500 IU/mL) concentrations. RESULTS: Ischemia alone, anastomosis alone, or both together reduced the bursting pressure. Glues containing a low fibrinogen concentration improved this parameter in all cases. High thrombin in combination with low fibrinogen also improved adherence exclusively in low-risk anastomoses. No differences were detected with respect to macroscopic parameters, histopathology, or hydroxyproline content at 5 days post-anastomosis. CONCLUSIONS: Fibrin glue with a low fibrinogen content normalizes the bursting pressure of high-risk ischemic left-colon anastomoses in rats at day 5 after surgery. .

Preoperative dexamethasone reduces postoperative pain, nausea and vomiting following mastectomy for breast cancer.

BACKGROUND: Dexamethasone has been reported to reduce postoperative symptoms after different surgical procedures. We evaluated the efficacy of preoperative dexamethasone in ameliorating postoperative nausea and vomiting (PONV), and pain after mastectomy. METHODS: In this prospective, double-blind, placebo-controlled study, 70 patients scheduled for mastectomy with axillary lymph node dissection were analyzed after randomization to treatment with 8 mg intravenous dexamethasone (n = 35) or placebo (n = 35). All patients underwent standardized procedures for general anesthesia and surgery. Episodes of PONV and pain score were recorded on a visual analogue scale. Analgesic and antiemetic requirements were also recorded. RESULTS: Demographic and medical variables were similar between groups. The incidence of PONV was lower in the dexamethasone group at the early postoperative evaluation (28.6% vs. 60%; p = 0.02) and at 6 h (17.2% vs. 45.8%; p = 0.03). More patients in the placebo group required additional antiemetic medication (21 vs. 8; p = 0.01). Dexamethasone treatment significantly reduced postoperative pain just after surgery (VAS score, 4.54 ± 1.55 vs. 5.83 ± 2.00; p = 0.004), at 6 h (3.03 ± 1.20 vs. 4.17 ± 1.24; p < 0.0005) and at 12 h (2.09 ± 0.85 vs. 2.54 ± 0.98; p = 0.04). Analgesics were required in more patients of the control group (21 vs. 10; p = 0.008). There were no adverse events, morbidity or mortality. CONCLUSIONS: Preoperative intravenous dexamethasone (8 mg) can significantly reduce the incidence of PONV and pain in patients undergoing mastectomy with axillary dissection for breast cancer. TRIAL REGISTRATION NUMBER: NCT01116713.

Role of fibrin glue in the prevention of cervical leakage and strictures after esophageal reconstruction of caustic injury.

BACKGROUND: The colon is the organ most commonly used for esophageal reconstruction after severe caustic injury. Complications of cervical anastomosis are very common. Fibrin sealant may reduce the incidence of complications in this high-risk anastomosis. The purpose of the present study was to assess the role of fibrin glue in the prevention of leakage and stricture at cervical coloesophageal anastomoses in children treated with esophageal reconstruction after caustic injury. METHODS: This was a case-control study of children with caustic esophageal injury treated surgically with esophageal reconstruction over a 10-year period. In the study group 3-4 ml of fibrin glue was placed over the anastomosis. The following variables were assessed: age, sex, weight, leakage or stricture at the cervical anastomosis, morbidity, and mortality. RESULTS: The study group included 14 children, and the control group included 24 children. There were no differences in the distributions of sex, age, anthropometric variables, or preoperative laboratory test results. All children underwent esophageal replacement with colon substitution through the retrosternal space. Dehiscence and leakage at the cervical anastomosis were observed in 50% of children in the control group and 28.5% of children in the study group (P = 0.17). Strictures were observed in 7.15% of the study group and 20.8% of the control group, and 5 and 17 children, respectively, developed cervical complications (P = 0.03). There were no differences in major complications, and mortality was similar in the two groups (P = 0.60). CONCLUSIONS: Fibrin glue, when used as a sealant for cervical coloesophageal anastomosis, can reduce the risk of leakage and stricture.

[Subarachnoid blockade with ropivacaine versus bupivacaine in urologic and orthopedic surgery]. / Bloqueo raquídeo subaracnoideo con ropivacaína versus bupivacaína isobárica en cirugía urológica y ortopédica.

OBJECTIVE: To compare the effects of intrathecal isobaric ropivacaine (IR) versus isobaric bupivacaine (IB) in a dose ratio of 3:2 in non-ambulatory urologic and orthopedic surgery. METHODS: One hundred and seventeen patients scheduled for surgery were randomized and assigned in a double-blind fashion to receive either 15 mg of IR (n = 58) or 10 mg of IB (n = 59) into the subarachnoid space. RESULTS: There were no differences about age, sex distribution, body mass index, type of surgical interventions and operative time. Both groups were similar respect to latency time and extension of sensory block. Complete motor blockade was reached in more than 90 % of patients of both groups ten minutes after the intrathecal injection and the length was significantly longer in the IB group (226.4 +/- 22.3 minutes versus 266.5 +/- 29.5, p < 0.001). There was no significant hypotension or bradicardia during the transoperative period. Three and a half hours after the end of the surgery, more patients of the IB group required intravenous analgesics and opiaceous derivates (p < 0.001). CONCLUSIONS: The motor blockade was longer in the IB group but postoperative analgesia was better in the IR group.