Estudio de densidad vascular en pacientes con retinitis pigmentosa por medio de angiografía por tomografía de coherencia óptica / Microvascular quantitative metrics in retinitis pigmentosa using optical coherence tomography angiography

Propósito Evaluar cambios en la densidad vascular (VD) mediante la angiografía por tomografía de coherencia óptica (OCTA) en los diferentes sectores maculares de pacientes con retinitis pigmentosa (RP) y controles. Métodos Estudio observacional de 22 casos y 21 controles. Se reclutan 22 pacientes con RP y 21 controles. Se obtienen imágenes de tamaño 6×6 del área macular mediante Angio-OCT SS-DRI-Triton 1.22 (Topcon, Japón), desechando las imágenes con mala calidad. Se recoge agudeza visual, biomicroscopía, campo visual y tomografía de coherencia óptica (OCT) estructural. El área macular se divide en 4 sectores (nasal, superior, inferior y temporal), y se comparan los valores de VD entre ambos grupos en los plexos superficial (SVP) y profundo (DVP). Se estudia también la correlación entre la VD y el grosor macular. Resultados Diez pacientes con RP se desecharon por mala calidad de imagen. Se analizan 12 pacientes con RP y 21 controles sanos. El índice de campo visual (VFI) medio en el grupo RP fue del 26,11% (±17,29). La VD fue significativamente inferior en el grupo RP comparado con los controles en todos los sectores maculares del DVP (Superior 43,48±3,79 vs. 48,86±2,62; p<0,0001; Nasal 40,52±4,30 vs. 46,01±3,23; p=0,0002; Inferior 42,76±5,26 vs. 50,10±3,36; p<0,0001; Temporal 40,42±4,46 vs. 46,09±2,91; p=0,0001) y en todos menos en el sector nasal en el SVP (Superior 39,86±4,46 vs. 46,47±2,61; p<0,0001; Nasal 40,35±4,56 vs. 44,09±2,87; p=0,0067; Inferior 40,74±4,61 vs. 46,58±3,26; p=0,0002; Temporal 39,98±5,07 vs. 44,78±3,28; p=0,0024). La correlación entre la VD y el grosor macular se mostró positiva y significativa (RP: r=0,59; p=0,043; controles r=0,51; p=0,018). Conclusiones Los pacientes con formas avanzadas de RP muestran menor VD en el área macular que los controles sanos. Estas diferencias están presentes en todos los cuadrantes del DVP y en 3 de ellos en el SVP (AU)

Aims To describe the changes in vessel density (VD) using optical coherence tomography angiography (OCTA) of the different sectors in the macular area between retinitis pigmentosa (RP) patients and controls. Methods Observational case-control study. We initially included 22 patients with RP and 21 controls. We obtained 6x6 OCTA images of the macular area using Angio-OCT SS-DRI-Triton 1.22 (Topcon, Japan), together with visual acuity, biomicroscopy, visual field and optical coherence tomography examination. We compared the VD values in both groups for both superficial (SVP) and deep vascular plexus (DVP). Correlation between VD and macular thickness was also calculated. Results The mean visual field index (VFI) in the RP group was 26.11% (±17.29). VD was significantly lower in the RP group compared with healthy controls in all sectors of the DVP (Superior 43.48±3.79 vs 48.86±2.62, P<.0001; Nasal 40,52±4.30 vs 46,01±3.23, P=.0002; Inferior 42.76±5.26 vs 50.10±3.36, P<.0001; Temporal 40.42±4.46 vs 46.09±2.91, P=.0001) and in all but nasal sector in the SVP (Superior 39.86±4.46 vs 46.47±2.61, P<.0001; Nasal 40.35±4.56 vs 44.09±2.87, P=.0067; Inferior 40.74±4.61 vs 46.58±3.26, P=.0002; Temporal 39.98±5.07 vs 44.78±3.28, P=.0024). Correlation between VD and macular thickness was positive and significant (RP: r=.59, P=.043; controls r=.51, P=.018). Conclusions Patients with advanced forms of RP have less vessel density in the macular area than healthy subjects. These differences are present in all four quadrants in the DVP and three in the SVP (AU)

Microvascular quantitative metrics in retinitis pigmentosa using optical coherence tomography angiography.

AIMS: To describe the changes in vessel density (VD) using optical coherence tomography angiography (OCTA) of the different sectors in the macular area between retinitis pigmentosa (RP) patients and controls. METHODS: Observational case-control study. We initially included 22 patients with RP and 21 controls. We obtained 6 × 6 OCTA images of the macular area using Angio-OCT SS-DRI-Triton 1.22 (Topcon, Japan), together with visual acuity, biomicroscopy, visual field and optical coherence tomography examination. We compared the VD values in both groups for both superficial (SVP) and deep vascular plexus (DVP). Correlation between VD and macular thickness was also calculated. RESULTS: The mean visual field index (VFI) in the RP group was 26.11% (±17.29). VD was significantly lower in the RP group compared with healthy controls in all sectors of the DVP (Superior 43.48 ±â€¯3.79 vs 48.86 ±â€¯2.62, P < .0001; Nasal 40,52 ±â€¯4.30 vs 46,01 ±â€¯3.23, P = .0002; Inferior 42.76 ±â€¯5.26 vs 50.10 ±â€¯3.36, P < .0001; Temporal 40.42 ±â€¯4.46 vs 46.09 ±â€¯2.91, P = .0001) and in all but nasal sector in the SVP (Superior 39.86 ±â€¯4.46 vs 46.47 ±â€¯2.61, P < .0001; Nasal 40.35 ±â€¯4.56 vs 44.09 ±â€¯2.87, P = .0067; Inferior 40.74 ±â€¯4.61 vs 46.58 ±â€¯3.26, P = .0002; Temporal 39.98 ±â€¯5.07 vs 44.78 ±â€¯3.28, P = .0024). Correlation between VD and macular thickness was positive and significant (RP: r = 0.59, P = .043; controls r = 0.51, P = .018). CONCLUSIONS: Patients with advanced forms of RP have less vessel density in the macular area than healthy subjects. These differences are present in all four quadrants in the DVP and three in the SVP.