Utilidad del tromboelastograma en pediatría: correlación con pruebas habituales de la coagulación / Usefulness of the thromboelastogram in children: correlation with habitual coagulation tests

INTRODUCCIÓN: Los exámenes habituales de coagulación evalúan distintos elementos de la hemostasia en forma par cial, y no traducen las interacciones celulares, lo que es especialmente sensible en pacientes críticos. Las técnicas viscoelásticas, como el tromboelastograma (TEG) muestran el proceso de coagulación completo, y están siendo evaluadas como exámenes de la coagulación global. OBJETIVO: determinar la correlación de los exámenes habituales de coagulación con los valores del TEG, en niños atendidos en una unidad de cuidados intensivos (UCI). PACIENTES Y MÉTODO: Se revisaron 238 TEG de pacientes <18 años, con evidencia de alteración de coagulación clínica y/o de laboratorio, hospitalizados en UCI. Se correlacionaron los valores de los parámetros del TEG con cada uno de los valores de los exámenes habituales de coagulación. Los exámenes se obtuvieron según protocolo, utilizando una muestra de sangre de 4,5 ml para TEG con equipo TEG® 5000 Thrombelastograph Hemostasis Sys tem, mediante un transductor electromagnético que permite la medición de la resistencia durante la formación y lisis del coágulo. El recuento de plaquetas se obtuvo utilizando método automatizado o microscopía con contraste de fase; el fibrinógeno, tiempo de protrombina y de tromboplastina parcial activada por métodos nefelométricos. RESULTADOS: 201 TEGs correspondientes a 59 pacientes. Se evidenció una correlación moderada a baja en todos los parámetros medidos. No se encontró co rrelación entre porcentaje de lisis del coágulo, ni firmeza del coágulo. CONCLUSIONES: Existe una baja correlación entre la información entregada por TEG y los exámenes de coagulación habituales, esto sugiere que el TEG aporta información diferente acerca del estado de coagulación de los pacientes críticos evaluados.

INTRODUCTION: Usual coagulation tests partially evaluate different elements of hemostasis, and do not translate cell interactions, which is an especially sensitive issue in critically ill patients. Viscoelastic measurement techniques, such as thromboelastogram (TEG) show the complete coagulation pro cess and are being evaluated as global coagulation tests. OBJECTIVE: To determine the correlation of the usual coagulation tests with the TEG values, in children treated in an intensive care unit (ICU). PATIENTS AND METHOD: We reviewed 238 TEGs of patients under 18 years of age, with evidence of clinical and/or laboratory coagulation alterations, who were hospitalized in the ICU. The TEG para meter values were correlated with each of the usual coagulation test values. The tests were obtained according to the protocol, using a 4.5 ml blood sample for TEG with TEG® 5000 Thrombelastograph Hemostasis System, through an electromagnetic transducer that allows the measurement of resis tance during the clot formation and lysis. Platelet count was obtained using an automated method or phase-contrast microscopy, and fibrinogen levels, prothrombin time, and partial thromboplastin time activated by nephelometric methods. RESULTS: 201 TEGs corresponding to 59 patients were re viewed. A moderate to low correlation was observed in all the measured parameters. No correlation was found between the percentages of clot lysis or clot firmness. CONCLUSIONS: There is a low corre lation between the information provided by TEG and the usual coagulation tests. This suggests that the TEG provides different information about the coagulation status of the evaluated critical patients.

Caracterización epidemiológica y clínica de pacientes operados con diagnóstico de quiste branquial / Epidemiological and clinical characterization of operated patients diagnosed with branchial cyst

Branchial Cysts are uncommon anomalies in regular clinical practice. However, among congenital cervical cysts, they represent about 30% from total. Objective: Characterize patients diagnosed with operated branquial cyst in our clinical center, and correlate clinic, imaging and final diagnose. Material and methods: Retrospective descriptive study of discharged patients diagnosed as cervical cysts, between January 2005 and July 2011, at Hospital Clinico Universidad de Chile. Selection of Clinical records with final diagnose of branchial cyst were selected. Age, sex, clinical story, imaging exams, pre-operative and post-operative diagnoses, and biopsy report were registered. Results: from a total of 149 cervical cysts, 31 (20,8%) were branchial cysts. Man 45% and women 55%. By age, 9 (29%) were < 15 years old (average: 6,69 years) and 22 (70,9%) > 15 years (average: 33,7 years). Lateral cervical mass was the most common clinical manifestation. Regarding Imaging study, 15 cervical ultrasounds (sensibility 0,86 and specificity 0,98) and 13 cervical CTA scans (sensibility 0,92 and specificity 0,94) were conducted. In 9 patients, imaging studies weren't conducted for the clinical diagnose (sensibility 0,77 and specificity 0,98). Correlation of pre-operative and post-operative diagnose was 87%. Discussion: According to literature, presentation age is generally during childhood; however, in our statistics it presented during adult age, which could be explained due to the main focus our medical center has for adult population. Most common clinical presentation was lateral neck mass, which had a good clinical correlation, however improves with imaging studies. (AU)

Xilitol y prevención de otitis media aguda / Xylitol and acute otitis media prevention

La otitis media aguda (OMA) es una patología extraordinariamente frecuente en escolares y lactantes, siendo la primera causa de uso de antibióticos en este último grupo. Elprincipal agente involucrado es el S. pneumoniae. Se ha postulado la hipótesis de que el xilitol, un poliol presente en la corteza de abedules, podría tener efectos inhibitorios sobre ésta y otras bacterias otopatógenas en el momento en que se encuentran en la rinofaringe, lo que podría resultar efectivo a la hora de prevenir la invasión de la cavidad timpánica y por ende el desarrollo de OMA. En esta revisión se analizan los estudios realizados que respaldan el uso del xilitol como profilaxis de OMA.

Acute otitis media (AOM) is an extremely common disease in school children and infants, which is the first cause of antibiotic use in this latter group. The main agent involved is S pneumoniae. It has proposed the hypothesis thatxylitol, a polyol which is present in the bark of birch, may have inhibitory effects on this bacteria and another otopathogen at the time found in the nasopharynx, which may be effective in preventing the invasion of the tympanic cavity and thus the development of AOM. In this review, is it discussed the studies supporting the use of xylitol prophylaxisof AOM.

Amigdalectomía en pacientes con asimetría amigdalina: análisis histopatológico y factores de riesgo de malignidad / Tonsillectomy in patients with tonsillar asymmetry: histopathological analysis and risk factors for malignancy

Introduction: Tonsillectomy is the most frequent ENT (ear nose and throat) surgery. An absolute indication is suspicion of a malignant tumor. Therefore the importance of determine whose patients are inherent to that risk. Objective: To conduct a histopathological analysis of asymmetrical tonsillar biopsies, correlate clinical suspicion of tumor with biopsy results, and compare patients with exclusive tonsillar asymmetry versus tonsillar asymmetry plus others symptoms or signs suggestive of malignant pathology. Methods: Retrospective analysis of tonsillar biopsies processed from patients diagnosed with tonsillar asymmetry at HCUCH (Hospital Clínico Universidad de Chile), February 2003 through June 2006 period. Two groups were selected: Exclusive tonsillar asymmetry (Group A) and asymmetry associated with clinical findings suggestive of malignancy (Group B). Results: 2083 Tonsillectomies, from which 135 (6,48 percent) where sent to biopsy. Of these, 41 (30,3 percent) had been diagnosed as tonsillar asymmetry (2 percent from total). 23 female and 18 male, age range: 2- 73 years old, (Average age: 27 years), 9patients had tonsillar asymmetry associated to a clinical suspicion finding of malignant pathology, while 32 patients had exclusive asymmetry. Group A histopathological analysis informed as Chronic Inflammation in 24 cases (75 percent), chronic inflammation plus actinomyces presence in 8 cases (25 percent), no malignant pathology; correlation Obs. Tumor/Real tumor: 4/0 = 0 percent. Group Bhistopathological analysis informed as chronic inflammation: 4 (44,4 percent), chronic Inflammation plus actinomyces presence 2 (22,2 percent), Squamous papilloma 1 (11,1 percent), Squamous Carcinoma 1 (11,1 percent), Lymphoma 1 (11,1 percent); correlation Obs. Tumor/Real Tumor: 6/3 = 50 percent. Discussion: Tonsillar asymmetry corresponded to 31 percent of tonsillectomies prescriptions in our center.

Epidemiología de la patología otorrinolaringológica ambulatoria y quirúrgica en población mayor de 65 años en el Hospital Clínico de la Universidad de Chile / Epidemiology otorhinolaryngological pathology ambulatory and surgery in population over 65 years at the Hospital Clínico de la Universidad de Chile

Introduction: The otolaryngology (ear, nose and throat (ENT)) pathology is a common ambulatory cause of consultation in an elderly country as Chile. Aims: Characterize the ENT diagnosis in ambulatory elderly population more than 65 years old consultant on ENT clinic of HCUCH (Hospital Clínico Universidad de Chile) during 2009. Patients and Methods: descriptive transversal retrospective study. ENT diagnosis was rescued of clinical archives. Anatomical functional groups, specific diagnosis and sex were tabulated. A patient could have more than one diagnosis. STATA statistical analysis was performed. Results: 148 elderly (204 diagnosis) consulted during 2009, average age 74,08+/-6,87 years old, 65,54 percent women. The most frecuent groups were the vestibular-auditive (n=133; 65,20 percent), naso-sinusal (n=36; 17,64 percent) and pharingo-laryngeal (n=17; 8,33 percent). The most frecuent specific diagnosis were prebycusis(n=43; 21,08 percent), earwax (n=28; 13,73 percent), allergic rhinitis (n=17; 8,33 percent) and unspecified vertigo (n=13; 6,37 percent). There were not significant differences between gender in any specific diagnosis. Discussion: The diagnostic profile is consistent to age group. Results agree with the high frequency of presbycusis, but differ in the high presence of earwax and allergic rhinitis above other expected diagnostics. Conclusion: new Chilean epidemiologic information of ambulatory and surgical ENT pathology was provided.