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1.
Childs Nerv Syst ; 34(3): 555-558, 2018 03.
Article in English | MEDLINE | ID: mdl-29063265

ABSTRACT

INTRODUCTION: Stereotactic procedures have been used in neurosurgery for many years. In children especially, care should be considered to avoid complication caused by fixation of the frame in a not fully developed skull bone. We present our method to adapt the frame in children under 2 years of age. METHODS: Twelve procedures in patients under 24 months were performed between 2003 and 2015. Micromar frame was used. It was adapted with a small pillow made of gauss attached to the posterior part to hold the head, then four pins were fixed without adjustment. We analyze for each patient age, indication, histopathology, and complications. RESULTS: Eleven patients with a mean age of 13.5 months (range 9 to 22 months) underwent 12 stereotactic procedures. In all cases, biopsy samples were obtained, histopathology was positive in 11/12 cases. No complications occurred. CONCLUSION: Stereotactic frame procedures need special attention in small children where the skull bones are not fully developed. We present a simple method to perform this surgery in patients under 2 years of age.


Subject(s)
Brain Neoplasms/surgery , Neurosurgical Procedures/instrumentation , Neurosurgical Procedures/methods , Stereotaxic Techniques/instrumentation , Brain Neoplasms/diagnostic imaging , Female , Humans , Imaging, Three-Dimensional/methods , Infant , Male , Tomography, X-Ray Computed/methods
2.
Rev. esp. med. nucl. (Ed. impr.) ; 29(6): 293-298, nov.-dic. 2010. tab, ilus
Article in English | IBECS | ID: ibc-82377

ABSTRACT

La actividad extracardíaca (AEC) puede afectar la interpretación del SPECT de perfusión miocárdica (SPM); los softwares disponibles incluyen delimitación de bordes para resolver este problema. Objectivo. Evaluar la influencia de AEC en detección automática de bordes miocárdicos en condiciones normales y perfusión anormal y evaluar reproducibilidad del procesamiento semi-automático. Métodos. Se analizaron 100 SPM, 50 con AEC; cada sub-grupo incluyó 25 casos con alteraciones de perfusión. Los casos fueron procesados automáticamente y por 4 operadores independientes con diferente nivel de experiencia. Se empleó software QGS y QPS con enmascaramiento y reubicación del ventrículo izquierdo y se analizaron parámetros funcionales (volumen final diastólico y sistólico, fracción de eyección) y parámetros de perfusión como el score sumado de reversibilidad y la extensión del defecto de perfusión en reposo. Los datos se compararon con correlación de Pearson y test de student. Resultados. La correlación interobservador empeoró considerablemente con AEC y fue moderadamente afectada por alteraciones de perfusión. Los observadores más experimentados mostraron mejor correlación. La reproducibilidad fue mayor para los parámetros funcionales de perfusión, independiente de la experiencia del observador. Conclusiones. La AEC afecta de manera significativa la delimitación automática de bordes miocárdicos, influyendo en los valores de SPM. La reproducibilidad interobservador con procesamiento manual fue más afectada en parámetros funcionales que en scores de perfusión. Las alteraciones de perfusión no interfieren con la reproducibilidad del software, y cuando estaban presentes, se observó una mejor correlación. Si no existe AEC importante, la intervención manual en el procesamiento debe evitarse(AU)


Objective. Extracardiac activity (ECA) may affect interpretation of gated SPECT myocardial perfusion studies (MPSs). To solve this problem, available softwares include myocardial edge delimitation. Purpose. To evaluate the influence of ECA in automatic myocardial edge detection under normal conditions and with abnormal perfusion and also evaluate the reproducibility of semi-automatic processing. Methods. A total of 100 MPSs, 50 with ECA, were analyzed. Each subgroup included 25 cases with perfusion abnormalities. The cases were processed automatically and by 4 independent operators with different levels of experience. Commercial QGS and QPS softwares were used with tools to mask and relocate the left ventricle area. Functional parameters (final diastolic and systolic volumes and ejection fraction) and perfusion parameters such as the reversibility perfusion score and rest perfusion defect extension were analyzed. The data were compared with Pearson's correlation and Student's test. Results. Interobserver correlation significantly worsened with the presence of ECA and was moderately affected by perfusion abnormalities. More experienced observers presented better correlation. Reproducibility was greater for the functional perfusion parameters, independently of the observer's experience. Conclusions. ECA significantly affects automatic edging delimitation, affecting the MPS values. Interobserver reproducibility with manual processing was more altered regarding funtional parameters than in the perfusion scores. Perfusion abnormalities did not interfere with software reproducibility, and when present, better correlation was found. If ECA is not present, manual intervention should be avoided(AU)


Subject(s)
Humans , Female , Middle Aged , Perfusion/trends , Tomography, Emission-Computed, Single-Photon/instrumentation , Tomography, Emission-Computed, Single-Photon/methods , Stroke Volume , Tomography, Emission-Computed, Single-Photon/trends , Tomography, Emission-Computed, Single-Photon
3.
Rev Esp Med Nucl ; 29(6): 293-8, 2010.
Article in English | MEDLINE | ID: mdl-20570016

ABSTRACT

OBJECTIVE: Extracardiac activity (ECA) may affect interpretation of gated SPECT myocardial perfusion studies (MPSs). To solve this problem, available softwares include myocardial edge delimitation. PURPOSE: To evaluate the influence of ECA in automatic myocardial edge detection under normal conditions and with abnormal perfusion and also evaluate the reproducibility of semi-automatic processing. METHODS: A total of 100 MPSs, 50 with ECA, were analyzed. Each subgroup included 25 cases with perfusion abnormalities. The cases were processed automatically and by 4 independent operators with different levels of experience. Commercial QGS and QPS softwares were used with tools to mask and relocate the left ventricle area. Functional parameters (final diastolic and systolic volumes and ejection fraction) and perfusion parameters such as the reversibility perfusion score and rest perfusion defect extension were analyzed. The data were compared with Pearson's correlation and Student's test. RESULTS: Interobserver correlation significantly worsened with the presence of ECA and was moderately affected by perfusion abnormalities. More experienced observers presented better correlation. Reproducibility was greater for the functional perfusion parameters, independently of the observer's experience. CONCLUSIONS: ECA significantly affects automatic edging delimitation, affecting the MPS values. Interobserver reproducibility with manual processing was more altered regarding functional parameters than in the perfusion scores. Perfusion abnormalities did not interfere with software reproducibility, and when present, better correlation was found. If ECA is not present, manual intervention should be avoided.


Subject(s)
Artifacts , Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography , Myocardial Ischemia/diagnostic imaging , Myocardial Perfusion Imaging , Observer Variation , Radiopharmaceuticals , Technetium Tc 99m Sestamibi , Aged , Automation , Female , Humans , Intestines/diagnostic imaging , Liver/diagnostic imaging , Male , Middle Aged , Myocardial Ischemia/pathology , Radiopharmaceuticals/pharmacokinetics , Reproducibility of Results , Software , Stroke Volume , Technetium Tc 99m Sestamibi/pharmacokinetics , Thallium Radioisotopes/pharmacokinetics , Tissue Distribution
4.
Rev. med. nucl. Alasbimn j ; 12(48)abr. 2010. ilus, tab, graf
Article in Spanish | LILACS | ID: lil-553018

ABSTRACT

Introducción. La Fluor-18 deoxiglucosa (18F-FDG) ha sido utilizada en múltiples estudios para determinar la tasa de utilización de la glucosa en condiciones normales y patológicas. Actualmente se sabe que en la insuficiencia cardiaca el patrón metabólico se encuentra alterado. Materiales y métodos Se realizó medición del metabolismo glucocídico en 4 portadores de miocardiopatía dilatada y en 3 sujetos sanos, todos bajo una carga de hidratos de carbono vía oral (75gr). Se adquirieron imágenes dinámicas de tórax. La captación miocárdica se estimó a partir de las curvas tiempo-actividad en aurícula y ventrículo izquierdo utilizando el análisis gráfico de Patlak. Resultados. Los siete pacientes estudiados son de sexo masculino. La tasa de captación de la 18F-FDG para el grupo de pacientes con miocardiopatía dilatada fue 1,31 +/- 0,2 versus 1,26 +/- 0,37 ml/100gr/min en el grupo control. Conclusión. La medición del metabolismo cardiaco de la glucosa por medio de 18F-FDG PET es posible de realizar en un servicio clínico, permitiendo de esta forma determinar la repercusión fisiológica y los cambios del metabolismo miocárdico en diversas enfermedades además de la evaluación de terapia.


Introduction. Fluorine18 deoxyglucose (18F-FDG) has been used in numerous studies to determine the cardiac rate of glucose metabolism in normal and pathological conditions. It is known that during heart failure the metabolic pattern is altered. Patlack’s graphical analysis allows the assessment of heart muscle glucose consumption in patients with non-ischaemic heart failure and normal subjects. Methods. Standardized measurement of glucose metabolism was performed in four patients with dilated cardiomyopathy and three healthy subjects. All subjects received an oral load of carbohydrates (75gr) previous to scanning. Dynamic images of the thorax were acquired. Myocardial uptake was estimated from time-activity curves in the atrium and left ventricle using Patlack’s graphical analysis. Results. All subjects studied were male. 18F-FDG uptake rate for the group with dilated cardiomyopathy was 1.31 +/-0.2, versus 1.26 +/- 0.37 ml/100gr/min in the control group. Conclusion. Measurement of cardiac glucose metabolism by 18F-FDG PET is feasible in a clinical service, allowing impact evaluation of physiologic and metabolic changes in the myocardium in different pathologic scenarios in addition to therapy assessment.


Subject(s)
Humans , Male , Adult , Middle Aged , Cardiomyopathy, Dilated , Cardiomyopathy, Dilated/metabolism , /pharmacokinetics , Glucose/metabolism , Positron-Emission Tomography , Myocardium/metabolism , Radiopharmaceuticals/pharmacokinetics
5.
Rev Esp Med Nucl ; 28(6): 278-82, 2009.
Article in Spanish | MEDLINE | ID: mdl-19995534

ABSTRACT

UNLABELLED: Coronary artery disease (CAD) is the leading cause of death in many countries. Stress electrocardiogram (ECG) is able to detect myocardial ischemia and also has prognostic value, which may be impaired in presence of electrical baseline abnormalities. Stress myocardial single photon emission tomography (SPECT) has recognized utility yield in assessment of CAD, requiring independent interpretation of ECG and myocardial images. PURPOSE: To analyze stress ECG interpretation reproducibility among observers with different training level, including pre- and post-graduate medical students, compared to an experienced cardiologist and also with SPECT. METHOD: We studied 95 patients under CAD evaluation, mean age 61+/-9.3 years (range: 42-85), 56% male. Interobserver correlation kappa (k) between perfusion gated (99m)Tc-Sestamibi SPECT and exercise ECG were calculated as normal/abnormal, presence of necrosis, ischemia or mixed pattern. Interobserver kappa (k) analysis was made. RESULTS: 49.5% stress ECG and 45% SPECT studies were abnormal at the initial report with 62.1% concordance (k: 0.24) for normal/abnormal and 58.9% for ischemia (k: 0.14). Agreement between stress ECG initial report and independent cardiologist was 89.5% (k: 0.78). The correlation between independent observers and the initial report ranged between 62.1% and 48.4%, for baseline ECG between 41.1% and 90.5% considering normal/abnormal, and between 80% and 93.7% (k: 0.59-0.87) for the presence of ischemia. CONCLUSION: Stress ECG interpretation presented adequate interobserver reproducibility with greater agreement in the most experienced observers, confirming the importance of training.


Subject(s)
Coronary Disease/diagnostic imaging , Exercise Test , Myocardial Perfusion Imaging , Observer Variation , Tomography, Emission-Computed, Single-Photon , Adult , Aged , Aged, 80 and over , Cardiology/education , Clinical Competence , Electrocardiography , Female , Gated Blood-Pool Imaging , Humans , Male , Middle Aged , Nuclear Medicine/education , Physicians/psychology , Reproducibility of Results , Single-Blind Method , Students, Medical/psychology
6.
Rev. esp. med. nucl. (Ed. impr.) ; 28(6): 278-282, nov.-dic. 2009.
Article in Spanish | IBECS | ID: ibc-76348

ABSTRACT

ResumenLa enfermedad coronaria (EC) es la principal causa de muerte en muchos países. El electrocardiograma (ECG) de esfuerzo permite evaluar la isquemia miocárdica y agrega valor pronóstico, con rendimiento limitado en presencia de alteraciones eléctricas basales. La SPECT (single photon emission computed tomography ‘tomografía computarizada por emisión de fotón único’) en esfuerzo se utiliza para evaluación de EC, con reconocido buen rendimiento, que requiere interpretación independiente del ECG y de las imágenes miocárdicas.ObjetivoAnalizar la concordancia en la interpretación del ECG de esfuerzo entre observadores en entrenamiento, incluyendo alumnos de pre y posgrado de Medicina, con un cardiólogo experimentado y con SPECT miocárdica.MétodoSe incluyeron 95 pacientes enviados para evaluación de EC, edad: 61 ± 9,3 años (rango: 42–85), 56%: hombres. Se calculó la concordancia entre la SPECT de perfusión sincronizada con 99mTc-Sestamibi y ECG de esfuerzo según resultado normal/anormal, necrosis, isquemia o patrón mixto. Se efectuó un análisis interobservador kappa (k).ResultadosFueron anormales el 49,5% de los ECG de esfuerzo según informe inicial y el 45% de los estudios SPECT; la concordancia para normal/anormal fue del 62,1% (κ: 0,24) y para isquemia del 58,9% (κ: 0,14). La concordancia entre informe ECG de esfuerzo inicial y el del cardiólogo independiente fue del 89,5% (κ: 0,78). Las concordancias interobservador con este informe variaron entre el 62,1 y el 48,4%; para ECG basal, entre el 41,1 y el 90,5% considerando normal/anormal; y entre el 80 y el 93,7% (κ: 0,59–0,87) para isquemia entre éste y otros observadores.ConclusiónEn la interpretación del ECG de esfuerzo se encontró adecuada reproducibilidad entre observadores, con mayor acuerdo en los más experimentados, lo que confirma la importancia del entrenamiento(AU9


AbstractCoronary artery disease (CAD) is the leading cause of death in many countries. Stress electrocardiogram (ECG) is able to detect myocardial ischemia and also has prognostic value, which may be impaired in presence of electrical baseline abnormalities. Stress myocardial single photon emission tomography (SPECT) has recognized utility yield in assessment of CAD, requiring independent interpretation of ECG and myocardial images.PurposeTo analyze stress ECG interpretation reproducibility among observers with different training level, including pre- and post-graduate medical students, compared to an experienced cardiologist and also with SPECT.MethodWe studied 95 patients under CAD evaluation, mean age 61±9.3 years (range: 42–85), 56% male. Interobserver correlation kappa (k) between perfusion gated 99mTc-Sestamibi SPECT and exercise ECG were calculated as normal/abnormal, presence of necrosis, ischemia or mixed pattern. Interobserver kappa (k) analysis was made.Results49.5% stress ECG and 45% SPECT studies were abnormal at the initial report with 62.1% concordance (k: 0.24) for normal/abnormal and 58.9% for ischemia (k: 0.14). Agreement between stress ECG initial report and independent cardiologist was 89.5% (k: 0.78). The correlation between independent observers and the initial report ranged between 62.1% and 48.4%, for baseline ECG between 41.1% and 90.5% considering normal/abnormal, and between 80% and 93.7% (k: 0.59–0.87) for the presence of ischemia.ConclusionStress ECG interpretation presented adequate interobserver reproducibility with greater agreement in the most experienced observers, confirming the importance of training(AU)


Subject(s)
Humans , Electrocardiography/methods , Exercise Test/methods , Tomography, Emission-Computed, Single-Photon/methods , Coronary Disease/physiopathology , Coronary Circulation/physiology , Reproducibility of Results
7.
Comput Med Imaging Graph ; 33(4): 247-55, 2009 Jun.
Article in English | MEDLINE | ID: mdl-19261437

ABSTRACT

The "left ventricular mass" (LVM) using Tc-99m Sestamibi SPECT imaging may be a useful parameter to quantitatively assess the left ventricle and hence its function. The LVM was determined without reorienting the images along the long axis of the left ventricle. A comparison with reoriented SPECT images was then performed. The LVM showed the expected variations among different pathological heart conditions and the control subjects. The left ventricular mass obtained from non-reoriented tomographic views of the myocardium can be a useful index to quantitatively assess various heart conditions where the myocardium lacks perfusion either between rest and stress studies or similar conditions in longitudinal studies.


Subject(s)
Artificial Intelligence , Image Interpretation, Computer-Assisted/methods , Imaging, Three-Dimensional/methods , Pattern Recognition, Automated/methods , Technetium Tc 99m Sestamibi , Tomography, Emission-Computed, Single-Photon/methods , Ventricular Dysfunction, Left/diagnostic imaging , Aged , Aged, 80 and over , Algorithms , Female , Humans , Image Enhancement/methods , Male , Middle Aged , Radiopharmaceuticals , Reproducibility of Results , Sensitivity and Specificity
8.
Rev Esp Med Nucl ; 27(2): 83-9, 2008.
Article in Spanish | MEDLINE | ID: mdl-18367045

ABSTRACT

INTRODUCTION AND OBJECTIVES: The correct interpretation of myocardial perfusion single photon emission computed tomography (SPECT) requires knowledge of the technique reproducibility. The objective was analyze the interobserver correlation of different experience in the interpretation of myocardial perfusion SPECT in patients following acute myocardial infarction (AMI) in order to improve the quality of our site. METHODS: Sixty cases (56 +/- 11 years, 87 % men) with transmural AMI who had recently undergone successful thrombolysis were included. Resting perfusion with (99m)Tc-sestamibi was performed at one week post-AMI. ANALYSIS: Semiquantitative interpretation using 17 segment-model by 2 independent specialists and 5 observers, was performed blindly. Left ventricular ejection fraction (LVEF) was measured with isotopic ventriculography one month after AMI, with a mean of 38 %. RESULTS: Using independent and then agreed on perfusion analysis, average involved segments/patient was 9.3 +/- 4 and the sum of severity 25 +/- 13. Readings of other observers ranged from 7 +/- 3.7 to 9.4 +/- 3.9 and 16.7 +/- 9.7 to 24.6 +/- 13, respectively, consistent with the reading of the specialists of between 0.779-0.871 (kappa: 0.565-0.741). There was no significant difference when the number of segments were analyzed in 40 % of the cases and for intensity in 60 % of them in more experienced observers. Correlation with consensus reading for the number of segments ranged from 0.84 to 0.94 and for severity from 0.79 to 0.89. Identification of culprit arteries was acceptable, with r values between 0.612 and 0.683 and kappas between 0.629 and 0.656. Correlation of the number of involved segments and severity with LVEF performed one month after AMI was 0.73 and 0.74, respectively. CONCLUSIONS: There was good correlation in the interpretation of myocardial perfusion SPECT, with a significantly better fit in more experienced observers. This academic exercise was also helpful in improving our residents' skills in cardiology.


Subject(s)
Myocardial Infarction/diagnostic imaging , Myocardial Infarction/surgery , Radiopharmaceuticals , Technetium Tc 99m Sestamibi , Tomography, Emission-Computed, Single-Photon , Adult , Aged , Female , Humans , Male , Middle Aged , Myocardial Reperfusion , Observer Variation
9.
Rev. esp. med. nucl. (Ed. impr.) ; 27(2): 83-89, mar. 2008. ilus, tab
Article in Es | IBECS | ID: ibc-66003

ABSTRACT

Introducción y objetivos. La interpretación de la tomografía de emisión de fotón único (SPECT) de perfusión miocárdica requiere conocer la reproducibilidad de la técnica. El objetivo fue analizar la correlación interobservadores de distinta experiencia en interpretación de SPECT en pacientes post-infarto agudo de miocardio (IAM) en un contexto de mejora de la calidad de nuestros centros. Métodos. Se incluyeron 60 casos (56 ± 11 años, 87 % hombres) con infarto transmural reciente sometidos a trombolisis exitosa. Una semana después del IAM se efectuó perfusión de reposo con 99mTc-sestamibi. Análisis. Semicuantitativo mediante lectura ciega por 2 especialistas independientes y 5 observadores utilizando 17 segmentos. La fracción de eyección ventricular izquierda (FEVI) promedio medida con ventriculografía isotópica al mes fue del 38 %. Resultados. En análisis consensuado, el promedio de segmentos comprometidos/paciente fue 9,3 ± 4 y la sumatoria de severidad 25 ± 13; los otros observadores variaron entre: 7 ± 3,7-9,4 ± 3,9 y 16,7 ± 9,7-24,6 ± 13, respectivamente, concordando con los especialistas entre 0,779 y 0,871 (kappa: 0,565-0,741). No hubo diferencia significativa en el 40 % de los análisis para el número de segmentos comprometidos y en el 60 % para intensidad, en observadores con mayor experiencia. La correlación con consenso para el número de segmentos varió entre 0,84 y 0,94, y para severidad entre 0,79 y 0,89. La asignación de arterias fue adecuada (r: 0,612-0,683 y kappas 0,629-0,656). La correlación de segmentos comprometidos y su severidad con la FEVI efectuada al mes del IAM fueron de 0,73 y 0,74, respectivamente. Conclusiones. Existió buena correlación en interpretación de SPECT, con mejor ajuste en observadores experimentados. Este ejercicio sirvió para mejorar habilidades de interpretación en cardiología


Introduction and objectives. The correct interpretation of myocardial perfusion single photon emission computed tomography (SPECT) requires knowledge of the technique reproducibility. The objective was analyze the interobserver correlation of different experience in the interpretation of myocardial perfusion SPECT in patients following acute myocardial infarction (AMI) in order to improve the quality of our site. Methods. Sixty cases (56 ± 11 years, 87 % men) with transmural AMI who had recently undergone successful thrombolysis were included. Resting perfusion with 99mTc-sestamibi was performed at one week post-AMI. Analysis. Semiquantitative interpretation using 17 segment-model by 2 independent specialists and 5 observers, was performed blindly. Left ventricular ejection fraction (LVEF) was measured with isotopic ventriculography one month after AMI, with a mean of 38 %. Results. Using independent and then agreed on perfusion analysis, average involved segments/patient was 9.3 ± 4 and the sum of severity 25 ± 13. Readings of other observers ranged from 7 ± 3.7 to 9.4 ± 3.9 and 16.7 ± 9.7 to 24.6 ± 13, respectively, consistent with the reading of the specialists of between 0.779-0.871 (kappa: 0.565-0.741). There was no significant difference when the number of segments were analyzed in 40 % of the cases and for intensity in 60 % of them in more experienced observers. Correlation with consensus reading for the number of segments ranged from 0.84 to 0.94 and for severity from 0.79 to 0.89. Identification of culprit arteries was acceptable, with r values between 0.612 and 0.683 and kappas between 0.629 and 0.656. Correlation of the number of involved segments and severity with LVEF performed one month after AMI was 0.73 and 0.74, respectively. Conclusions. There was good correlation in the interpretation of myocardial perfusion SPECT, with a significantly better fit in more experienced observers. This academic exercise was also helpful in improving our residents' skills in cardiology


Subject(s)
Humans , Tomography, Emission-Computed, Single-Photon/methods , Myocardial Infarction/diagnosis , Technetium Tc 99m Sestamibi , Observer Variation
10.
Rev. med. nucl. Alasbimn j ; 7(29)july 2005. tab, graf
Article in Spanish | LILACS | ID: lil-444071

ABSTRACT

La pesquisa adecuada del tromboembolismo pulmonar (TEP) tiene importancia en el manejo terapéutico y en el pronóstico de los pacientes. El cintigrama de ventilación y perfusión (VQ) es un método bien establecido en la evaluación de esta patología. La concordancia interobservador puede ser bastante variable y debieran minimizarse las discordancias dentro de un mismo grupo. Objetivo: Conocer la concordancia entre observadores formados en nuestro centro y correlacionarlos con el informe oficial emitido con los antecedentes clínicos y radiológicos. Método: Se analizaron retrospectivamente 401 estudios de 382 pacientes con sospecha de TEP de diferente probabilidad clínica, informados por 6 observadores independientes con distinta experiencia. Se realizó lectura en forma ciega informando como alta, baja o intermedia probabilidad de TEP, basado en la experiencia individual y en criterios PIOPED modificados. Se aplicó kappa ponderado. Resultados: En los informes existió 27.2 por ciento de alta probabilidad de TEP, 5.5 por ciento fueron intermedia o indeterminada y 67.3 por ciento de baja probabilidad, casi normal o normal. La concordancia entre los observadores varió entre 72.6 y 86 por ciento con variación de índice kappa entre 0.582 y 0.743. La correlación con el informe emitido varió entre 74.3 y 81.8 por ciento y (k: 0.582 y 0.675). Hubo mayor concordancia entre los observadores con mayor experiencia. Conclusión: En nuestro centro existe una excelente concordancia interobservador con buenos índices kappa en la interpretación ciega de los VQ solicitados por TEP. Este ejercicio además, sirvió como entrenamiento práctico para los residentes del centro.


Subject(s)
Humans , Male , Adolescent , Adult , Female , Child, Preschool , Child , Middle Aged , Pulmonary Circulation , Pulmonary Embolism , Ventilation-Perfusion Ratio , Data Interpretation, Statistical , Pulmonary Embolism/physiopathology , Retrospective Studies , Single-Blind Method , Probability , Radiopharmaceuticals , Sensitivity and Specificity , Observer Variation
11.
Med. infant ; 9(3): 211-215, sept. 2002. tab, graf
Article in Spanish | LILACS | ID: lil-335245

ABSTRACT

Objetivo:En el marco de un programa de evaluacíon de calidad de atención médica,se crea la comisión de Mortalidad con el objetivo de analizar,con una nueva propuesta metodológica,la atención de los pacientes fallecidos en el hospital.Este informe reporta los resultados de trabajo de dicha comisión.Pacientes y métodos:se realizó un análisis retrospectivo de todos los pacientes fallecidos en el hospital entre el 15 de marzo y el 30 de septiembre de 2001.Cada historia clínica tuvo dos instancias independientes de revisión:el grupo tratante y un miembro de la comisión.Se registraron;edad,lugar/res de internación,diagnostico de base,lugar de óbito,solicitud de necropsia,y concordancia entre el grupo tratante y la comisióm.La muerte se clasifico en inevitable,potencialmente evitable o evitable.Resultados:se registraron 7759 admisiones y 149 fallecimientos(1.9 por ciento)siete historias clínicas no pudieron ser evaluadas.La mediana de edad fue de 18.5 meses(r=1d-19a)El 17,6 por ciento eran menores de 1 mes y 43,4 por ciento menor de 1 año.la mediana del tiempo de internación de 9.5 días(r=3-215)Los diagnósticos más frecuentes de enfermedad de base fueron:enfermedad oncológica 36,cardiopatía congénita 15 e infección respiratoria 12.La principal causa de muerte de aquellas consideradas potencialemente evitables(n=10)fue la infección intrahospitalaria.Conclusiones:La mortalidad hospitalaria durante el período de estudio fue de 1.9 por ciento,El 80 por ciento de la muertes ocurrieron en el área de terapia intensiva(ucip,ucin y quemados)Se consideraron inevitables 97/107 muertes(90 por ciento)potencialmente evitables 10(9.3 por ciento)y una evitables(0.9 por ciento)Solo se realizó necropsia en el 14.7 por ciento de la población estudiada


Subject(s)
Humans , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Mortality , Hospital Mortality , Medical Audit , Quality of Health Care , Pediatrics
12.
Childs Nerv Syst ; 12(7): 385-90; discussion 390-1, 1996 Jul.
Article in English | MEDLINE | ID: mdl-8869774

ABSTRACT

Forty-eight consecutive children treated for craniopharyngioma at the Juan P. Garrahan National Paediatric Hospital (Buenos Aires, Argentina) from 1988 to 1994 are described. Complications of patients undergoing total resection alone and those undergoing subtotal or partial resection plus radiotherapy were compared. Survival time and quality of life proved more satisfactory in the former group, as there were no recurrences. In contrast, among the latter patients, 53% suffered relapses. Endocrinological complications were similar in the two groups. Postsurgical subdural haematomas were quite frequent and eight patients required treatment for intracranial hypertension. Vascular complications, though less common, led to high morbidity and mortality. There was a considerable incidence of shunt malfunction (80%), arguing against placement of a preoperative shunt, which tended besides to foster postsurgical subdural haematomas.


Subject(s)
Craniopharyngioma/surgery , Pituitary Neoplasms/surgery , Postoperative Complications/etiology , Adolescent , Adult , Cerebrospinal Fluid Shunts , Child , Child, Preschool , Combined Modality Therapy , Craniopharyngioma/mortality , Craniopharyngioma/radiotherapy , Female , Follow-Up Studies , Humans , Hypophysectomy , Infant , Male , Pituitary Irradiation , Pituitary Neoplasms/mortality , Pituitary Neoplasms/radiotherapy , Postoperative Complications/mortality , Quality of Life , Radiotherapy, Adjuvant , Survival Rate , Treatment Outcome
13.
Pediatr Neurosurg ; 17(1): 25-9, 1991.
Article in English | MEDLINE | ID: mdl-1811709

ABSTRACT

Three patients with delayed posttraumatic intracranial hematoma (2 intracerebral and 1 extradural) are described, together with a review of the literature on possible etiologies. Close monitoring of the patient with craniocerebral trauma is essential to avoid a fatal outcome and to repeat neuroradiological studies when warranted.


Subject(s)
Cerebral Hemorrhage/surgery , Head Injuries, Closed/surgery , Adolescent , Brain Concussion/diagnostic imaging , Brain Concussion/surgery , Brain Edema/diagnostic imaging , Brain Edema/surgery , Cerebral Hemorrhage/diagnostic imaging , Child , Glasgow Coma Scale , Head Injuries, Closed/diagnostic imaging , Hematoma, Epidural, Cranial/diagnostic imaging , Hematoma, Epidural, Cranial/surgery , Humans , Intracranial Pressure/physiology , Male , Tomography, X-Ray Computed
14.
Arch. argent. pediatr ; 80(2): 184-90, 1982.
Article in Spanish | LILACS | ID: lil-7567

ABSTRACT

La tomografia computada (TC) ha sido hasta hoy el metodo de eleccion para el diagnostico de hemorragia intracerebral. Con el advenimiento de la ecografia, especialmente en tiempo real, se ha podido diagnosticar dicha patologia en recien nacidos de alto riesgo.En este articulo se describen dichos hallazgos y se discuten sus ventajas y limitaciones con respecto a la TC


Subject(s)
Infant, Newborn , Infant , Humans , Cerebral Hemorrhage , Infant, Newborn, Diseases , Ultrasonics
15.
Arch. argent. pediatr ; 80(2): 184-90, 1982.
Article in Spanish | BINACIS | ID: bin-36025

ABSTRACT

La tomografia computada (TC) ha sido hasta hoy el metodo de eleccion para el diagnostico de hemorragia intracerebral. Con el advenimiento de la ecografia, especialmente en tiempo real, se ha podido diagnosticar dicha patologia en recien nacidos de alto riesgo.En este articulo se describen dichos hallazgos y se discuten sus ventajas y limitaciones con respecto a la TC


Subject(s)
Infant, Newborn , Infant , Humans , Infant, Newborn, Diseases , Cerebral Hemorrhage , Ultrasonics
16.
Rev. Hosp. Niños B.Aires ; 23(96): 175-81, 1981.
Article in Spanish | LILACS | ID: lil-11731

ABSTRACT

Se realizaron 41 ecografias cerebrales en 29 lactantes a traves de la fontanelas anterior y posterior y de las suturas diastasadas. Se hace hincapie en las ventajas y desventajas de este metodo en comparacion con la tomografia computada en las diferentes patologias halladas: hidrocefalias congenitas y postpioventriculitis,tumores y colecciones subdurales. La inexistencia de radiaciones ionizantes, la brevedad del estudio, el no necesitar sedacion, hacen de la ecografia un metodo complementario de gran utilidad en el diagnostico y seguimiento de pacientes con las patologias antes mencionadas


Subject(s)
Infant, Newborn , Infant , Humans , Brain Neoplasms , Hydrocephalus , Tomography, X-Ray Computed , Ultrasonics
17.
Rev. Hosp. Niños B.Aires ; 23(96): 175-81, 1981.
Article in Spanish | BINACIS | ID: bin-35385

ABSTRACT

Se realizaron 41 ecografias cerebrales en 29 lactantes a traves de la fontanelas anterior y posterior y de las suturas diastasadas. Se hace hincapie en las ventajas y desventajas de este metodo en comparacion con la tomografia computada en las diferentes patologias halladas: hidrocefalias congenitas y postpioventriculitis,tumores y colecciones subdurales. La inexistencia de radiaciones ionizantes, la brevedad del estudio, el no necesitar sedacion, hacen de la ecografia un metodo complementario de gran utilidad en el diagnostico y seguimiento de pacientes con las patologias antes mencionadas


Subject(s)
Infant, Newborn , Infant , Humans , Comparative Study , Hydrocephalus , Brain Neoplasms , Tomography, X-Ray Computed , Ultrasonics
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