Total Gestational Weight Gain Is Explained by Leptin and Body Fat, Regardless of Pre-Pregnancy Body Mass Index and Other Adipokines, in Mexican Adolescents.

Pre-pregnancy body mass index (pBMI) is a predictor of gestational weight gain (GWG). However, other factors, such as adipokines and inflammation markers, may also be associated with GWG. The aim of the study was to determine the association of leptin, adiponectin, irisin, and C-reactive protein, with GWG in adolescents. A longitudinal study was conducted from 2018 to 2023 in adolescents with a clinically healthy pregnancy. The assessments included sociodemographic and clinical data, pBMI, percent of body fat, serum concentrations of leptin, adiponectin, irisin, and high-sensitivity C-reactive protein (hsCRP), and total GWG adequacy. Cox regression models were performed, the outcome variables were inadequate and excessive GWG. In 198 participants, being overweight/obesity was marginally associated with a protective effect against inadequate GWG (HR = 0.44, 95%CI = 0.18-1.06), regardless of maternal characteristics and adipokines. Leptin (HR = 1.014, 95%CI = 1.008-1.021), and body fat percent (HR = 1.11, 95%CI = 1.05-1.17) were associated with a higher risk of excessive GWG, independent of other maternal variables such as pBMI, while adiponectin was associated with a lower risk. These findings suggest that, in Mexican adolescents, adipose tissue and its adipokines during pregnancy may play a more significant role in the final GWG than body weight.

Are Overweight and Obesity Risk Factors for Developing Metabolic Syndrome or Hypertension after a Preeclamptic Event?

OBJECTIVE: To identify the determinants and risks associated with developing hypertension and metabolic syndrome in the first year postpartum in women who experienced preeclampsia. METHODS: A cohort study was conducted, involving women who had experienced preeclampsia (PE) recently. The control group was women with the same characteristics but a healthy pregnancy. The variables analyzed were somatometry, disease history, pre-pregnancy body mass index (Pre-BMI), and Third Adult Treatment Panel updated (ATP III) metabolic syndrome (MS) data (blood pressure, obesity, triglycerides, high-density lipoproteins, and fasting glucose). These variables were measured at 3, 6, and 12 months postpartum. RESULTS: Women with a history of PE exhibited higher systolic and diastolic blood pressure than women without PE. The risk of developing isolated diastolic arterial hypertension at 3 and 12 months of follow-up was two to eight times greater in women with a history of PE. Factors associated with having higher blood pressure levels were preeclampsia, insulin resistance, age, and BMI. Neither the pre-BMI index nor gestational weight gain (GWG) had any effect on blood pressure in any of the three assessments. Women with preeclampsia had a 5- to 8-fold increased risk of developing MS (which could be explained not only by the history of preeclampsia but also by the history of pre-pregnancy obesity). However, PE was not identified as a risk factor at the six-month evaluation and was only explained by pre-pregnancy obesity and overweight. CONCLUSIONS: Obesity and overweight, as well as preeclampsia, were strongly associated with the development of hypertension and metabolic syndrome during the first year following childbirth.

[Reinsertion to the work in workers with partially permanent disability for hand injury]. / Reinserción laboral en trabajadores con incapacidad permanente parcial por lesiones de mano.

Background: Hand injuries resulting from accidents at work are one of the main causes of disability in workers. Every worker ruled with Partial Permanent Disability must legally be reinstated to the same workplace. Objective: To know the prevalence of reintegration and causes of non-reintegration into workers with Partial Permanent Disability due to hand injuries. Material and methods: A descriptive, observational, and retrospective study, which included 100% of the opinions of Parcial Permanent Disability due to hand injuries, generated from 2012 to 2016 at UMF 61 of Veracruz. Results: 143 cases were analyzed, 127 (88.8%) were men and 16 (11.2%) women, with a mean age of 37.3 ± 11.6 years. Labor reintegration in the same company occurred in 60 (42%) of the cases, 50 (35%) were reinstated in another company and 33 (23.1%) were not reinstated to work. Regarding work termination: 51 (35.7%) workers were laid off after their ruling, 13 (9.1%) resigned, 12 (8.4%) terminated their contract, and 7 (4.9%) were retired. Currently 72 (50.3%) workers continue to perform physical work and 18 (12.6%) did not return to work. Conclusions: Labor reintegration occurred in less than half of the cases ruled. The main cause of the non-reintegration was the unjustified dismissal by the company where the accident occurred. Not reintegrating into the same workplace has: legal, economic, medical and social implications to the worker.

Introducción: las lesiones de mano derivadas de accidentes de trabajo constituyen una de las principales causas de discapacidad en los trabajadores. Todo trabajador dictaminado con Incapacidad Permanente Parcial (IPP), jurídicamente debe ser reinsertado a su mismo centro de trabajo. Objetivo: conocer la prevalencia de reinserción y causas de no reinserción laboral en trabajadores con IPP por lesiones de mano. Material y Métodos: estudio descriptivo, observacional y retrospectivo, que incluyó el 100% de los dictámenes de IPP por lesiones de mano, generados del 2012 al 2016 en la UMF 61 de Veracruz. Resultados: se analizaron 143 casos, 127 (88.8%) fueron hombres y 16 (11.2%) mujeres, con edad media 37.3 ± 11.6 años. La reinserción laboral en la misma empresa se presentó en 60 (42%) de los casos, 50 (35%) se reinsertaron en otra empresa y 33 (23.1%) no se reinsertaron al trabajo. Respecto de la terminación laboral: 51 (35.7%) trabajadores fueron despedidos posterior a su dictaminación, 13 (9.1%) renunciaron, 12 (8.4%) finalizaron su contrato, y 7 (4.9%) fueron jubilados. Actualmente 72 (50.3%) trabajadores continúa realizando un trabajo físico y 18 (12.6%) no volvió a trabajar. Conclusiones: la reinserción laboral se presentó en menos de la mitad de los casos. La principal causa de no reinserción fue el despido injustificado por la empresa donde ocurrió el accidente. No reintegrarse al mismo centro de trabajo conlleva implicaciones: legales, económicas, médicas y sociales al trabajador.

Bone Turnover Markers Changes Induced by Plateletpheresis May Be Minimized with Oral Supplementation of Calcium, Minerals, and Vitamin D before the Procedures: A Non-Randomized, Controlled Study.

Apheresis allows the collection of specific blood components but changes serum calcium (Ca), magnesium (Mg), copper (Cu), zinc (Zn), and hormones involved in bone metabolism due to citrate infusion. We assessed the effect of oral supplementation of calcium, vitamin D, and minerals as pills or an enriched diet before plateletpheresis donation on levels of divalent cations, hormones, and bone turnover markers that may prevent metabolic changes. Methods: Non-randomized controlled study including 134 donors. Serum parathyroid hormone (PTH), Ca, Mg, Zn, Cu, osteocalcin (OC), vitamin D, and type-1 collagen C-terminal telopeptide (CTX-1) levels were measured at baseline and post-procedure. Donors were divided into four groups: supplemented with calcium carbonate and vitamin D (cal + vitd); those receiving calcium, minerals, and vitamin D (cal + vitd + min); those receiving a calcium-rich diet (diet) and a control group (control). Results: PTH levels increased >1-fold, whereas tCa, tMg, Zn, Cu, iCa, iMg, and vitamin D levels decreased immediately after apheresis amongst donors of any group; when these levels were measured two weeks later, donors in the calcium-vitd and cal + vitd + min groups returned to basal values; donors in the cal + vitd + min group were the only group that kept their levels of OC and CTX unchanged at the different study times. Conclusions: Bone turnover markers changes induced by plateletpheresis may be minimized with oral supplementation of calcium, minerals, and vitamin D two days before the procedures.

Characterization of the Gut Microbiota of Individuals at Different T2D Stages Reveals a Complex Relationship with the Host.

In this work, we studied 217 Mexican subjects divided into six groups with different stages of glucose intolerance: 76 Controls (CO), 54 prediabetes (PRE), 14 T2D no medication (T2D-No-M), 14 T2D with Metformin (T2D-M), 22 T2D with polypharmacy (T2D-P), and 37 T2D with polypharmacy and insulin (T2D-P+I). We aimed to determine differences in the gut microbiota diversity for each condition. At the phylum level, we found that Firmicutes and Bacteroidetes outline major changes in the gut microbiota. The gut bacterial richness and diversity of individuals in the T2D-No-M group were lesser than other groups. Interestingly, we found a significant difference in the beta diversity of the gut microbiota among all groups. Higher abundance was found for Comamonadaceae in PRE, and Sutterella spp. in T2D-No-M. In addition, we found associations of specific microbial taxa with clinical parameters. Finally, we report predicted metabolic pathways of gut microbiota linked to T2D-M and PRE conditions. Collectively, these results indicate that each group has specific predicted metabolic characteristics and gut bacteria populations for each phenotype. The results of this study could be used to define strategies to modulate gut microbiota through noninvasive treatments, such as dietary intervention, probiotics or prebiotics, and to improve glucose tolerance of individuals with prediabetes or T2D.

Detection of risk for type 2 diabetes and its relationship with metabolic alterations in nurses. / Risco de desenvolvimento do diabetes tipo 2 em enfermeiras e sua relação com alterações metabólicas.

OBJECTIVE: to detect the risk of development of type 2 diabetes in nurses and its relationship with metabolic alterations. METHOD: cross-sectional study, with 155 nurses. The variables investigated were: sociodemographic, body mass index, waist circumference, waist-hip index, lipid profile, basal glycemia and oral glucose tolerance curve. The Finnish Diabetes Risk Score was used to collect data. RESULTS: 155 nurses were included, with an average age of 44 years and 85% were overweight or obese. 52% had a family history of diabetes and 21% had occasional hyperglycemia. With respect to the risk, 59% were identified with moderate and very high risk for type 2 diabetes. Glucose, insulin, glycosylated hemoglobin A1c and insulin resistance increased in parallel to the increased risk for type 2 diabetes, although lipids did not increase. 27% of the sample had impaired fasting glycemia. 15% had glucose intolerance and 5% had type 2 diabetes. CONCLUSION: there was a high detection rate of people at risk for type 2 diabetes (59%) and the high and very high risk score was associated with high levels of glycosylated hemoglobin A1c, glucose, insulin and insulin resistance, but not with lipids.

Traqueomalacia, complicación de la exéresis de un bocio difuso endotorácico bilateral / Tracheomalacia: a complication after removal of bilateral endothoracic diffuse goiter

Introducción: En cirugía de la glándula tiroides la mortalidad es nula en algunas series por lo que la morbilidad es la mayor preocupación del cirujano. Objetivo: Presentar la evolución clínica de una paciente con tiroidectomía total por bocio endotorácico bilateral. Caso clínico: Paciente que se le realizó tiroidectomía total por bocio endotorácico bilateral, técnicamente difícil, biopsia por congelación negativa de malignidad, bocio coloide. Nervios recurrentes visualizados. Debido al tamaño de la glándula y lo complejo que resultó la extracción se decidió trasladar a la paciente a la sala de recuperación intubada y ventilada para proceder a la recuperación de la ventilación espontánea y la extubación en un período más prolongado. Fue extubada una primera vez que fue fallida. Fue reintubada y ocurrió en una segunda ocasión después de ser reintervenida por un posible hematoma de la herida. En la TAC preoperatoria se observó una glándula tiroides grande con prolongación endotorácia bilateral y estenosis alta de la tráquea. Conclusión: Las complicaciones de obstrucción de la vía aérea después de una tiroidectomía no son frecuentes. Generalmente, después de una tiroidectomía total o parcial se trata de recuperar al paciente en el quirófano para después de la extubación realizar una laringoscopia que descarte la parálisis de las cuerdas vocales. La traqueomalacia como complicación después de una tiroidectomía no es frecuente, por lo que se alerta que de no haber diagnosticado y tratado rápidamente la paciente podría tener un desenlace fatal(AU)

Introduction: In surgery of the thyroid gland, mortality is null in some series, so morbidity is the surgeon's greatest concern. Objective: To present the clinical evolution of a patient with total thyroidectomy due to bilateral endothoracic goiter. Clinical case: This patient underwent total thyroidectomy due to bilateral endothoracic goiter, technically difficult, negative freeze biopsy of malignancy, colloid goiter. Visualized recurrent nerves. Due to the size of the gland and how complex the extraction was, it was decided to transfer the patient to the intubated and ventilated recovery room to proceed with the recovery of spontaneous ventilation and extubation in a longer period. She was extubated the first time it failed. She was re-intubated and it occurred on a second occasion after being re-operated due to a possible hematoma of the wound. In the preoperative CT scan, a large thyroid gland with bilateral endothoracic prolongation and high stenosis of the trachea was observed. Conclusion: Complications of airway obstruction after thyroidectomy are not frequent. Generally, after a total or partial thyroidectomy, it is a matter of recovering the patient in the operating room, in order to perform, after extubation, a laryngoscopy to rule out paralysis of the vocal cords. Tracheomalacia as a complication after thyroidectomy is not frequent, so it is warned that failure to diagnose and treat the patient quickly could have a fatal outcome(AU)

Polyunsaturated fatty acids and child neurodevelopment among a population exposed to DDT: a cohort study.

BACKGROUND: Child neurodevelopment has been positively linked to maternal intake of polyunsaturated fatty acids (PUFAs) during pregnancy; however, it is unknown if that relationship persists among populations exposed to environmental neurotoxicants. OBJECTIVE: The aim of this work was to assess whether maternal dietary intake of PUFAs during pregnancy is positively associated with child neurodevelopment, whose mothers were environmentally exposed to 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT). METHODS: A prospective cohort study with 276 mother-child pairs was performed in Mexico. Neurodevelopment was assessed by Bayley Scales II from children age 1 to 30 months. Dietary PUFAs intake was estimated by Food Frequency Questionnaire at 1st and 3rd trimester of pregnancy. DDE (1,1-dichloro-2,2-bis(p-chlorophenyl) ethylene, the main metabolite of DDT) maternal serum levels were determined by electron capture gas chromatography. Longitudinal multivariate linear mixed-effects analysis, which combines mental (MDI) and motor (PDI) Bayley scales in a single model, were performed. RESULTS: Our results show that in a sample environmentally exposed to DDT, maternal ingestion of DPA during the first trimester of pregnancy was positively associated with MDI (ß = 0.10, 95% CI 0.02, 0.18) in children from 1 to 30 months. Likewise, our results suggest that dietary ALA may be also related to MDI. CONCLUSION: DPA may benefit neurodevelopment even in populations exposed to DDT. Our results strengthen the importance of PUFAs intake during the prenatal period.

Risco de desenvolvimento do diabetes tipo 2 em enfermeiras e sua relação com alterações metabólicas / Detection of risk for type 2 diabetes and its relationship with metabolic alterations in nurses / Detección de riesgo de diabetes tipo 2 y su relación con alteraciones metabólicas en enfermeras

Objetivo: identificar o risco de desenvolvimento de diabetes tipo 2 em enfermeiras e sua relação com as alterações metabólicas. Método: estudo transversal, com 155 enfermeiras. As variáveis investigadas foram: sociodemográficas, índice de massa corporal, a circunferência da cintura, índice cintura-quadril, perfil lipídico, a glicemia basal e a curva oral de tolerância à glicose. Para a coleta de dados utilizou-se o Finnish Diabetes Risk Score. Resultados: Das 155 (100%) enfermeiras, a média de idade foi de 44 anos e 85% apresentavam sobrepeso ou obesidade; 52% tinham história familiar de diabetes e 21%, hiperglicemia ocasional. Em relação ao risco, 59% foram identificados com risco moderado e muito alto de diabetes tipo 2. A glicose, a insulina, a hemoglobina glicosilada A1c e a resistência à insulina aumentaram paralelamente ao aumento do risco de diabetes tipo 2, embora os lipídios não tenham aumentado. 27% das participantes apresentaram glicemia em jejum alterada, 15%, intolerância à glicose e 5%, diabetes tipo 2. Conclusão: houve uma elevada taxa de detecção de risco de diabetes tipo 2 (59%) e a pontuação de risco alto e muito alto foi associado com níveis elevados de hemoglobina glicosilada A1c, glicose, insulina e resistência à insulina, mas não com lipídios.

Objective: to detect the risk of development of type 2 diabetes in nurses and its relationship with metabolic alterations. Method: cross-sectional study, with 155 nurses. The variables investigated were: sociodemographic, body mass index, waist circumference, waist-hip index, lipid profile, basal glycemia and oral glucose tolerance curve. The Finnish Diabetes Risk Score was used to collect data. Results: 155 nurses were included, with an average age of 44 years and 85% were overweight or obese. 52% had a family history of diabetes and 21% had occasional hyperglycemia. With respect to the risk, 59% were identified with moderate and very high risk for type 2 diabetes. Glucose, insulin, glycosylated hemoglobin A1c and insulin resistance increased in parallel to the increased risk for type 2 diabetes, although lipids did not increase. 27% of the sample had impaired fasting glycemia. 15% had glucose intolerance and 5% had type 2 diabetes. Conclusion: there was a high detection rate of people at risk for type 2 diabetes (59%) and the high and very high risk score was associated with high levels of glycosylated hemoglobin A1c, glucose, insulin and insulin resistance, but not with lipids.

Objetivo: identificar el riesgo de desarrollo de diabetes tipo 2 en enfermeras y su relación con alteraciones metabólicas. Método: estudio transversal, con 155 enfermeras. Las variables investigadas fueron: sociodemográficas, el índice de masa corporal, circunferencia de cintura, índice cintura-cadera, perfil de lípidos, glucemia basal y curva de tolerancia oral a la glucosa. Para la recolección de datos se utilizó el Finnish Diabetes Risk Score. Resultados: De las 155 enfermeras, la edad promedio fue 44 años y 85% tenía sobrepeso u obesidad. El 52% tenía antecedentes familiares de diabetes de primera línea, el 21% hiperglucemia ocasional. Con relación al riesgo, se identificaron 59% con riesgo de diabetes tipo 2 moderado y muy alto. Glucosa, insulina, hemoglobina glucosa A1c y la resistencia a la insulina incrementaron paralelos al aumento del riesgo de diabetes tipo 2, aunque los lípidos no. El 27% de las enfermeras presentó glucemia basal alterada. El 15% tuvo intolerancia a la glucosa y 5% diabetes tipo 2. Conclusión: la detección de riesgo de diabetes tipo 2 fue elevada (59%) y el puntaje de riesgo alto y muy alto se relacionó con valores mayores de hemoglobina glucosa A1c, glucosa, insulina y resistencia a la insulina pero no con lípidos.

Gut Microbiota and Endothelial Dysfunction Markers in Obese Mexican Children and Adolescents.

Obesity is a metabolic disease characterized by low-grade inflammation and accompanied by dyslipidemia and up-regulation of other bioactive molecules, creating a predisposition to endothelial dysfunction and metabolic syndrome. We studied the association between gut microbiota diversity and endothelial dysfunction (EDF) markers in obese Mexican children and adolescents. We examined clinical data including metabolic factors and EDF markers in blood samples. Gut bacterial diversity was characterized by high-throughput sequencing of V3-16S rDNA libraries. Triglycerides, insulin, homeostasis model assessment-insulin resistant (HOMA-IR), leptin, C-reactive protein (CRP), and EDF marker intercellular adhesion molecule 1 (ICAM-1) were significantly higher in obese children and adolescents. Multivariate analysis showed statistically significant positive associations between vascular cell adhesion molecule 1 (VCAM-1) and Veillonellaceae, and between ICAM-1 and Ruminococcus in obese children. In obese adolescents, there was a statistically significant positive association between total cholesterol and Ruminococcus, and between ICAM-1 and Bacteroides. LEfSe analysis showed that the genus Lactobacillus and family Coriobacteriaceae were enriched in children, and genera Collinsella and Prevotella were enriched in obese adolescents. Obese children and adolescents had higher levels of insulin resistance and metabolic syndrome. These results suggest that obese Mexican children and adolescents had increased levels of CRP and a reduction of adiponectin, which causes higher expression of EDF markers, affecting endothelial function and associating with changes in the gut microbiota.

Resección de tumor traqueal / Tracheal tumor resection

Introducción: Los tumores primitivos de la tráquea son infrecuentes. Objetivo: Presentar la evolución de un paciente para resección de un tumor traqueal que ocluía el 95 por ciento de su luz. Caso Clínico: Disnea con tiraje supraesternal. No tolera el decúbito supino, presencia de tos y expectoración. Se le administró anestesia general endotraqueal convencional. Intubación con tubo No. 8. Se colocó en decúbito lateral izquierdo. Se procedió a realizar toracotomía. Con la tráquea abierta, el cirujano intubó el bronquio izquierdo con tubo No. 7. Se aspiraron secreciones, descendió la saturación de oxígeno. Se colocó sonda de levine en el pulmón derecho para oxigenación apneica con lo cual mejoró la saturación. En el pulmón ventilado se aplicó presión positiva al final de la espiración de 3 cm de agua con una fracción inspirada de oxígeno de 1. Luego de cerrada la pared posterior de la tráquea, se pasó una sonda nasogástrica a través del tubo colocado por vía orotraqueal. El cirujano fijó el extremo distal con una pinza. Se retiró el tubo orotraqueal inicial y se colocó un tubo 5.5 para intubar selectivamente el bronquio izquierdo por la boca y terminar la sutura de la tráquea y ambos bronquios. Terminado el procedimiento, se retiró el tubo y se ventilaron ambos pulmones. Conclusiones: La cirugía de tráquea impone un gran reto al anestesiólogo y al cirujano actuante, por lo que resultan imprescindibles las buenas relaciones del equipo de trabajo(AU)

Introduction: Primitive tumors of the trachea are rare. Objective: To present the evolution of a patient for removal of a tracheal tumor that occluded 95 percent of its light. Clinical case: Dyspnea with suprasternal retractions. No tolerance of supine decubitus, presence of cough and expectoration. The patient was administered conventional endotracheal general anesthesia. Intubation with tube number 8. The patient was placed in the left lateral decubitus position. A thoracotomy was performed. With the trachea open, the surgeon intubated the left bronchus with tube number 7. Secretions were aspirated, oxygen saturation decreased. A Levine tube was placed in the right lung for apneic oxygenation, which improved the saturation. In the ventilated lung, positive pressure was applied at the end of the expiration of 3 cm of water with an inspired fraction of oxygen of 1. After closing the posterior wall of the trachea, a nasogastric tube was passed through the tube placed via the orotracheal approach. The surgeon fixed the distal end with a clamp. The initial orotracheal tube was removed and a 5.5 tube was placed to intubate the left bronchus selectively through the mouth and complete the suture of the trachea and both bronchi. After the procedure, the tube was removed and both lungs were ventilated. Conclusions: The trachea surgery represents a great challenge for the anesthesiologist and the surgeon, a reason why good team working relations are essential(AU)

Maternal dietary intake of polyunsaturated fatty acids modifies association between prenatal DDT exposure and child neurodevelopment: A cohort study.

BACKGROUND: Maternal 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE) serum levels during pregnancy have been negatively linked to child neurodevelopment in contrast to intake of omega-3 and -6 (ω-3 and ω-6) fatty acids. OBJECTIVES: To assess whether maternal dietary intake of ω-3 and ω-6 during pregnancy modifies the association between exposure to DDE and child neurodevelopment from age 42-60 months. METHODS: Prospective cohort study with 142 mother-child pairs performed in Mexico. DDE serum levels were determined by electron capture gas chromatography. Dietary ω-3 and ω-6 intake was estimated by questionnaire. Child neurodevelopment was assessed by McCarthy Scales. RESULTS: Docosahexaenoic (DHA) fatty acid intake significantly modified the association between DDE and motor component: increased maternal DDE was associated with lower motor development in children whose mothers had lower DHA intake (ßlog2DDE = -1.25; 95% CI: -2.62, 0.12), in contrast to the non-significant increase among children whose mothers had higher DHA intake (ßlog2DDE-motor = 0.50; 95% CI: 0.55, 1.56). Likewise, arachidonic fatty acid (ARA) intake modified the association between DDE and memory component: increased maternal DDE was associated with a significantly larger reduction in the memory component in children whose mothers had lower ARA intake (ßlog2DDE = -1.31; 95% CI: -2.29, -0.32) than children whose mothers had higher ARA intake (ßlog2DDE-memory = 0.17; 95% CI: -0.78, 1.11). CONCLUSIONS: Dietary intake of DHA and ARA during pregnancy may protect against child neurodevelopment damage associated with prenatal maternal DDE levels.

Criterios para la administración de glóbulos rojos de pacientes que recibieron tratamiento quirúrgico / Criteria for the administration of red blood cells of patients receiving surgical treatment

Introducción: la mayoría de las transfusiones se realizan en pacientes quirúrgicos (60 a 70 por ciento) y los anestesiólogos son los responsables de la indicación de la mayoría de ellas (50 a 60 por ciento). Una práctica transfusional adecuada requiere una constante y crítica valoración clínica, si se tiene en cuenta que la transfusión de sangre alogénica es riesgosa. Objetivo: evaluar los criterios de indicación de glóbulos rojos en los pacientes que reciben tratamiento quirúrgico. Método: se realizó un estudio observacional, descriptivo, de corte transversal en el Servicio de Anestesiología y Reanimación del Hospital Clínico Quirúrgico Hermanos Ameijeiras. Resultados: predominó el grupo etáreo de 60 y más (49 por ciento), las mujeres 64 por ciento, y los sobrepesos 44 por ciento. El 22 por ciento presentó antecedentes de HTA. En el 67 por ciento de los casos no se expresó en la historia clínica el criterio de transfusión. Conclusiones: en ningún paciente se empleó los criterios válidos de indicación precisa de transfusión de glóbulos(AU)

Introduction: most transfusions are given in surgery patients (60 to 70 percent) and anesthesiologists are responsible for the indication of the majority (50 to 60 percent). Adequate transfusion practice requires constant and critical clinical assessment, taking into account that allogeneic blood transfusion is risky. Objetive: evaluating the indication criteria of red cells in patients undergoing surgery. Methods: an observational, descriptive, cross-sectional study in the Department of Anesthesiology Hermanos Ameijeiras Clinical Surgical Hospital was performed. Results: predominant age group of 60 and over (49 percent), women 64 percent overweights and 44 percent. 22 percent had a history of hypertension. In 67 percent of cases it was not expressed in the history of transfusion criteria. Conclusions: no patient in the valid precise indication of blood transfusion criteria was used(AU)

[Placenta accreta with placenta previa. Case report]. / Acretismo placentario con placenta previa. Reporte de un caso.

The placenta praevia and acretism placental were concurrently and are conditions of abnormal placenta, in which the villus sampling invade the myometrium at the site of implantation and is associated with the partial or complete absence of the decidua. Clinical case: Patient's 32 years of age, with 34 weeks pregnancy. Obstetric history of previous cesarean section, transvaginal bleeding several times; the diagnosis by ultrasound showed placenta praevia occlusive. Surgical treatment was abdominal total hysterectomy.

Prenatal p,p´-DDE exposure and neurodevelopment among children 3.5-5 years of age.

BACKGROUND: The results of previous studies suggest that prenatal exposure to bis[p-chlorophenyl]-1,1,1-trichloroethane (DDT) and to its main metabolite, 2,2-bis(p-chlorophenyl)-1,1-dichloroethylene (DDE), impairs psychomotor development during the first year of life. However, information about the persistence of this association at later ages is limited. OBJECTIVES: We assessed the association of prenatal DDE exposure with child neurodevelopment at 42-60 months of age. METHODS: Since 2001 we have been monitoring the neurodevelopment in children who were recruited at birth into a perinatal cohort exposed to DDT, in the state of Morelos, Mexico. We report McCarthy Scales of Children's Abilities for 203 children at 42, 48, 54, and 60 months of age. Maternal DDE serum levels were available for at least one trimester of pregnancy. The Home Observation for Measurement of the Environment scale and other covariables of interest were also available. RESULTS: After adjustment, a doubling of DDE during the third trimester of pregnancy was associated with statistically significant reductions of -1.37, -0.88, -0.84, and -0.80 points in the general cognitive index, quantitative, verbal, and memory components respectively. The association between prenatal DDE and the quantitative component was weaker at 42 months than at older ages. No significant statistical interactions with sex or breastfeeding were observed. CONCLUSIONS: These findings support the hypothesis that prenatal DDE impairs early child neurodevelopment; the potential for adverse effects on development should be considered when using DDT for malaria control.

Complicaciones hemodinámicas en el posoperatorio inmediato relacionadas con la reposición de volumen intraoperatorio / Hemodynamic complications related to intraoperative volume replacement in the immediate postoperative period

Introducción: la administración de fluidos durante el transoperatorio, tiene como premisa mantener un volumen intravascular adecuado para asegurar un equilibrio hidroelectrolítico y ácido-básico, y optimizar el transporte de oxígeno y la función de los factores de la coagulación.Objetivo: evaluar la relación entre la pauta de administración de fluidos como soluciones de reemplazo en el transoperatorio y la aparición de complicaciones hemodinámicas en el posoperatorio inmediato. Método: se realizó un estudio prospectivo, descriptivo, de corte transversal con una revisión exhaustiva de las historias clínicas a los pacientes que recibieron tratamiento quirúrgico en el Hospital Clínicoquirúrgico Hermanos Ameijeiras, en el período de enero de 2009 a enero de 2011; y al día siguiente del acto quirúrgico se entrevistaron los anestesiólogos actuantes. Resultados: de una muestra de 42 pacientes, 15 presentaron comportamiento hemodinámico sugerente de demanda de volumen, en las primeras 24 horas de concluida la intervención. La demanda de volumen se relacionó con intervenciones quirúrgicas abdominales y espinales complejas, reposición del volumen con coloides en las pérdidas hemáticas y de volemia en menos del 100 por ciento, y un tiempo quirúrgico mayor de 5 horas. No influyeron los valores de hematocrito, el peso y el por ciento de pérdidas hemáticas. Conclusiones: la estabilidad hemodinámica posoperatoria, en los pacientes a quienes se les realizaron intervenciones con pérdidas hemáticas mayores de 1 000 mL, estuvo influenciada por el porcentaje de sangre perdida y su reposición. Los mejores resultados se obtuvieron cuando la expansión superó las pérdidas y la reposición se realizó con coloides. El tiempo quirúrgico influyó significativamente en la estabilidad hemodinámica(AU)

Introduction: fluid administration during the transoperative period is aimed at maintaining an adequate intravascular volume to ensure appropriate hydroelectrolytic and acid-base balance and optimize oxygen transport and the function of coagulation factors. Objective: evaluate the relationship between the fluid administration regimen based on replacement solutions in the transoperative period and the appearance of hemodynamic complications in the immediate postoperative period. Method: a prospective cross-sectional descriptive study was conducted based on an exhaustive review of the medical records of patients undergoing surgical treatment at Hermanos Ameijeiras Clinical Surgical Hospital from January 2009 to January 2011. Additionally, the anesthesiologists involved were interviewed on the day after each operation. Results: in a sample of 42 patients, 15 showed hemodynamic behavior suggesting volume demand in the 24 hours following surgery. Volume demand was associated with abdominal and complex spinal surgery, colloidal volume replacement in blood losses or volemic losses under 100 percent, and a surgical time greater than 5 hours. No influence was exerted by hematocrit values, weight or percentage of blood loss. Conclusions: the postoperative hemodynamic stability of patients undergoing surgical interventions with blood losses above 1 000 mL was influenced by the percentage of blood lost and its replacement. The best results were obtained when the expansion exceeded the losses and when the replacement was conducted with colloids. Surgical time had a significant influence on hemodynamic stability(AU)

Complicaciones hemodinámicas en el posoperatorio inmediato relacionadas con la reposición de volumen intraoperatorio / Hemodynamic complications related to intraoperative volume replacement in the immediate postoperative period

Introducción: la administración de fluidos durante el transoperatorio, tiene como premisa mantener un volumen intravascular adecuado para asegurar un equilibrio hidroelectrolítico y ácido-básico, y optimizar el transporte de oxígeno y la función de los factores de la coagulación. Objetivo: evaluar la relación entre la pauta de administración de fluidos como soluciones de reemplazo en el transoperatorio y la aparición de complicaciones hemodinámicas en el posoperatorio inmediato. Método: se realizó un estudio prospectivo, descriptivo, de corte transversal con una revisión exhaustiva de las historias clínicas a los pacientes que recibieron tratamiento quirúrgico en el Hospital Clínicoquirúrgico "Hermanos Ameijeiras", en el período de enero de 2009 a enero de 2011; y al día siguiente del acto quirúrgico se entrevistaron los anestesiólogos actuantes. Resultados: de una muestra de 42 pacientes, 15 presentaron comportamiento hemodinámico sugerente de demanda de volumen, en las primeras 24 horas de concluida la intervención. La demanda de volumen se relacionó con intervenciones quirúrgicas abdominales y espinales complejas, reposición del volumen con coloides en las pérdidas hemáticas y de volemia en menos del 100 %, y un tiempo quirúrgico mayor de 5 horas. No influyeron los valores de hematocrito, el peso y el por ciento de pérdidas hemáticas. Conclusiones: la estabilidad hemodinámica posoperatoria, en los pacientes a quienes se les realizaron intervenciones con pérdidas hemáticas mayores de 1 000 mL, estuvo influenciada por el porcentaje de sangre perdida y su reposición. Los mejores resultados se obtuvieron cuando la expansión superó las pérdidas y la reposición se realizó con coloides. El tiempo quirúrgico influyó significativamente en la estabilidad hemodinámica.

Introduction: fluid administration during the transoperative period is aimed at maintaining an adequate intravascular volume to ensure appropriate hydroelectrolytic and acid-base balance and optimize oxygen transport and the function of coagulation factors. Objective: evaluate the relationship between the fluid administration regimen based on replacement solutions in the transoperative period and the appearance of hemodynamic complications in the immediate postoperative period. Method: a prospective cross-sectional descriptive study was conducted based on an exhaustive review of the medical records of patients undergoing surgical treatment at Hermanos Ameijeiras Clinical Surgical Hospital from January 2009 to January 2011. Additionally, the anesthesiologists involved were interviewed on the day after each operation. Results: in a sample of 42 patients, 15 showed hemodynamic behavior suggesting volume demand in the 24 hours following surgery. Volume demand was associated with abdominal and complex spinal surgery, colloidal volume replacement in blood losses or volemic losses under 100 %, and a surgical time greater than 5 hours. No influence was exerted by hematocrit values, weight or percentage of blood loss. Conclusions: the postoperative hemodynamic stability of patients undergoing surgical interventions with blood losses above 1 000 mL was influenced by the percentage of blood lost and its replacement. The best results were obtained when the expansion exceeded the losses and when the replacement was conducted with colloids. Surgical time had a significant influence on hemodynamic stability.

[Sensibility and specificity of ultrasonographic study in patients with rotator cuff injuries repaired with surgery]. / Cirugía por síndrome del manguito rotador. Utilidad del ultrasonido.

BACKGROUND: painful shoulder syndrome is a pathology that in some cases requires surgical treatment. The objective was to measure the sensibility and predictability of ultrasonographic study in patients with rotator cuff injuries treated with open surgery. METHODS: thirty-two patients with confirmed rotator cuff injury (either by US and/or arthrography) were surgically intervened through opened surgery technique. Sensibility and specificity of ultrasonographic study were measured and also functional results. RESULTS: functional results after open surgery were as follows; excellent in twenty five, good in five and not satisfactory in two patients. Ultrasound sensitivity was of 90 % and its specificity was 81.81 % with a predictive positive value of 94.73 and a predictive negative value of 90.17 %. CONCLUSIONS: the shoulder function recuperation after open surgery was satisfactory in most patients, allowing them going back to the performance of their activities.

Nanoparticle delivery systems for cancer therapy: advances in clinical and preclinical research.

Conventional anticancer drugs display significant shortcomings which limit their use in cancer therapy. For this reason, important progress has been achieved in the field of nanotechnology to solve these problems and offer a promising and effective alternative for cancer treatment. Nanoparticle drug delivery systems exploit the abnormal characteristics of tumour tissues to selectively target their payloads to cancer cells, either by passive, active or triggered targeting. Additionally, nanoparticles can be easily tuned to improve their properties, thereby increasing the therapeutic index of the drug. Liposomes, polymeric nanoparticles, polymeric micelles and polymer- or lipid-drug conjugate nanoparticles incorporating cytotoxic therapeutics have been developed; some of them are already on the market and others are under clinical and preclinical research. However, there is still much research to be done to be able to defeat the limitations of traditional anticancer therapy. This review focuses on the potential of nanoparticle delivery systems in cancer treatment and the current advances achieved.