Artículos de revistas
Study of the association between pupillary autonomic neuropathy and diabetic retinopathy in type 2 diabetic patients
Estudio de la asociación entre neuropatía autonómica pupilar y retinopatía diabética en pacientes diabéticos tipo 2
Author
Pérez Estepa, Héctor
Rivera Rojas, Lucy
Institutions
Abstract
Pupillary alteration in diabetes is interpreted as a manifestation of autonomic neuropathy and microvascular injury, as reflected in abnormal fundoscopic findings. Objective: To describe the association between pupillary autonomic neuropathy and diabetic retinopathy in type 2 diabetic patients. Materials and methods: Comparative analytical descriptive study. 76 subjects were included, divided into two groups: 46 type 2 diabetic patients, and 30 healthy (non-diabetic) subjects over 40 years. The diameter and speed of pupil response were measured with high resolution videoscopic camera, and the retina was evaluated with retinal camera. Results: There was a difference between the pupillary speed and HbA1c of the group of type 2 diabetic patients (0.512 mm/s SD 0.283, HbA1c 7.89% SD 1.88) and the group of healthy patients (3.5 mm SD 0.52; 0.785 mm/s SD 0.368; HbA1c 6.31 SD 0.59). The main fundoscopic findings localized in retina were neovascularization (78.26%), exudates (67.39%) and hemorrhages (60.87%). There was an association between HbA1c greater than 7.89% and pupillary speed less than 0.598 mm/s, and the presence of neovascularization and retinal hemorrhages. Conclusions: Evidence showed association between pupillary responses, HbA1c and retinal findings in type 2 diabetic patients. La alteración pupilar en la diabetes se interpreta como una manifestación de la neuropatía autonómica y lesión microvascular, lo que se refleja en hallazgos fundoscópicos no normales. Objetivo: describir la asociación entre neuropatía autonómica pupilar y retinopatía diabética en pacientes diabéticos tipo 2. Materiales y métodos: estudio descriptivo analítico comparativo. Se incluyeron 76 sujetos, divididos en dos grupos, 46 pacientes diabéticos tipo 2 y 30 sujetos sanos (no diabéticos) mayores de 40 años. Se midió el diámetro y la velocidad de respuesta pupilar con una cámara de alta resolución en sistema de videoscopia, y evaluación de retina en cámara retinal. Resultados: se encontró diferencia entre la velocidad pupilar y HbA1c del grupo de pacientes diabéticos tipo 2 (0,512 mm/s DE 0,283; HbA1c 7,89 % DE 1,88) con respecto al grupo de pacientes sanos (3,5 mm DE 0,52; 0,785 mm/s DE 0,368; HbA1c 6,31 DE 0,59). Los principales hallazgos fundoscópicos localizados en retina fueron neovascularización (78,26 %), exudados (67,39 %) y hemorragias (60,87 %). Se observó asociación entre HbA1c mayor a 7,89 % y velocidad pupilar menor a 0,598 mm/s con la presencia de neovascularización y hemorragias retinales. Conclusiones: se evidenció asociación entre las respuestas pupilares, la HbA1c y los hallazgos retinales en pacientes diabéticos tipo 2.
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