Browsing by Author "Torres Portelles, Oclides"

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Dosis acumulada de radiación en tomografía computarizada en pacientes atendidos en el Hospital Vicente Corral Moscoso, Cuenca, año 2019
(Universidad de Cuenca, 2023-03-05) Amaya Ortega, Adriana Sofía; Torres Portelles, Oclides
Background: computerized axial tomography is a diagnostic imaging study widely used in recent years due to its high specificity, however, exposure to ionizing radiation has generated controversy among medical personnel due to possible damage or mutations that it could cause in the tissue. Objective: to determine the radiation dose in computed tomography in patients treated at the Vicente Corral Moscoso Hospital during the year 2019. Materials and methods: this is a retrospective cross-sectional cohort study. 296 clinical records of patients who met the inclusion criteria were included. The information was analyzed using the statistical program SPSS version 15.0, applying descriptive statistics. Results: 72% of patients underwent simple tomographies and 49.3% contrasted. The most studied anatomical regions were the head and neck structures with 65.9%. In 90.9% of the cases that underwent simple and contrast CT, the effective dose of radiation was low (0-50 mSV); in the people in whom only a simple CT was performed, 4.4% were categorized as medium risk and 2.4% high; and in participants who underwent contrast-enhanced CT, 2.7% and 2% were considered medium and high risk respectively. According to the accumulated radiation, 81.4% presented low risk; in simple CT 8.4% medium risk in contrast to 7.4% in contrast-enhanced CT and 4.7% versus 3.7% high risk in simple and contrast-enhanced CT respectively.
Sensibilidad y especificidad en los pacientes con cáncer de recto para la estatificación primaria por tomografía computarizada multidetector versus resonancia magnética. Revisión sistemática
(Universidad de Cuenca, 2022-02-02) Díaz Landy, Elisa Denisse; Torres Portelles, Oclides
Background: Rectal cancer is the third most common neoplasm worldwide. Tomography and Magnetic Resonance have advantages in the diagnosis of primary staging in, which are characterized differently in the evaluation General Objective: To determine the sensitivity and specificity in patients with rectal cancer for primary staging by Multidetector Computed Tomography versus Magnetic Resonance. Methodology: A systematic search was carried out for studies with quantitative methodologies to compare MRI and CT in RC in primary staging. Results: The feeding indices the following values for MRI sensitivity (57.1% - 100%), specificity (69.1% - 98.32%), PPV (36.4% - 97.14%) and NPV (83% - 100%) and for CT a sensitivity (47% - 100%), specificity (60% - 95.4%), PPV (75.9% - 98%) and NPV (67% - 100%), MRI was more accurate in the evaluation of T1, T2 and N, while CT was effective in distant metastases. Conclusions: MRI shows better resolution in the intestinal layers, the intersphincter plane and mesorectal fascia and lymph nodes while CT is more precise in M staging. Therefore, MRI is the technique of first choice in the primary staging of rectal cancer. Limitations: limits the lack of luminal distention in CT images, study design, selection bias, the sample was heterogeneous and small.
Validez entre la cervicometría determinada por ultrasonografía y el parto pretérmino en embarazadas atendidas en el Hospital José Carrasco Arteaga. Cuenca, 2018 – 2019.
(Universidad de Cuenca, 2023-04-05) Valdivieso Monteros, Dania Melissa; Torres Portelles, Oclides
Background: Preterm birth is one of the main causes of neonatal morbidity and mortality. Cervical length measured by ultrasonography is a tool that could predict preterm birth. Objective: to establish the validity between cervical length measured by ultrasonography and preterm birth in pregnant women treated at the José Carrasco Arteaga Hospital, period 2018-2019. Methodology: observational, retrospective study, diagnostic test validation. We reviewed 400 medical records of pregnant women whose delivery was attended at the José Carrasco Arteaga Hospital during the period from January 2018 to December 2019 and who have an ultrasound with a cervical length report between 22 to 36 weeks of gestation. The information was collected through a data collection form. The analysis was performed in the SPSS 15.0 program. Sensitivity, specificity, positive predictive value, negative predictive value, and ROC curve of ultrasonographic cervical length were determined. Results: the prevalence of preterm birth was 31%, 23.3% were classified as late preterm, followed by 4.3 %, 1.8%, and 1.8% as moderate, very preterm, and extreme preterm infants, respectively. According to the measurement of the cervical canal, 88.3% were categorized as low risk of peterm birth, however, 8.8% and 3% were considered as moderate and high risk. Cervical length measured by ultrasonography sensitivity was 32.61%, specificity 47.58%, positive and negative predictive value 58.06% and 24.08% respectively; the area under the curve was 0.63, without showing predictive capacity of preterm birth.