Revista Espanola de Enfermedades Digestivas (Sep 2008)
Efecto hemodinámico esplácnico de somatostatina y octreótido en cirróticos: Estudio con ultrasonografía Doppler Splanchnic hemodynamic effects of somatostatin and octreotide in cirrhotic patients: A Doppler ultrasonographic study
Abstract
Objetivo: valoración ultrasonografica Doppler del efecto hemodinámico de la administración intravenosa de somatostatina y octreótido. Material y método: aleatorizamos a 45 cirróticos con varices esofágicas para recibir en una hora una infusión intravenosa de somatostatina (SOM, 250 µg), octreotido (OCT, 50 µg) o placebo (PLA). Pretratamiento y a 15, 30, 45 y 60 minutos medimos velocidad media, índice de congestión, volumen de flujo y diámetro de la vena porta además del índice de resistencia en arteria mesentérica superior. Analizamos las concentraciones séricas de bradicinina y péptido intestinal vasoactivo (VIP) en situación basal y a 30 y 60 minutos. Resultados: respecto de los valores basales tanto SOM como OCT provocaron un descenso significativo en la velocidad (-19,41 vs. -11.19%) y flujo portal (-22,79 vs. -12,33%), con aumento del índice de congestión (+17,5 vs. +7,5%) y del índice de resistencia arterial (+7,18 vs. +6,16%) respecto de sus valores basales (p Aim: Doppler-ultrasound assessment of the splanchnic hemodynamic effects of intravenous somatostatin and octreotide administration. Material and method: forty-five cirrhotic patients with esophageal varices were randomized to receive 1-hour intravenous somatostatin (SOM, 250 µg), octreotide (OCT, 50 µg), or placebo (PLA). In baseline and at 15, 30, 45 and 60 minutes of infusion, mean velocity, congestion index, flow volume and diameter of the portal vein, as well as the superior mesenteric artery resistivity index, were measured. Plasma bradykinine and vasoactive intestinal peptide (VIP) concentrations were also measured at baseline and at 30 and 60 minutes. Results: while placebo caused no changes in any of the venous and arterial parameters, SOM and OCT caused a sustained decrease in portal vein velocity (-19.41 vs. -11.19%) and flow (-22.79 vs. -12.33%), and an increase in the congestion index (+17.5 vs. +7.5%) and resistivity index of the superior mesenteric artery (+7.18 vs. +6.16%) from baseline (p < 0.05). These changes were already evident at 15 minutes and remained unchanged over the study period. With respect to OCT, SOM caused a higher reduction in mean velocity and flow in the portal vein, with no significant differences for congestion index and mesenteric artery resistivity index, both increased by SOM and OCT. Plasma bradykinine and VIP concentrations remained unchanged in the three groups. Conclusions: at therapeutic doses, intravenous somatostatin and octreotide reduce portal vein velocity and flow, and increase portal vein congestion index and superior mesenteric artery resistivity index. Somatostatin causes a higher portal flow reduction than octreotide in spite of a similar splanchnic arterial effect.
