Color Doppler Study of Superior Mesenteric Artery For Intake of Different Types of Meals

Abstract

Duplex ultrasound (DU) provides a simple, portable, reproducible, and non-invasive assessment of blood flow. Measurement of luminal diameter and blood velocity allows estimation of blood flow , peripheral resistance and the detection of arterial occlusive disease. Owing to its size and anatomic position, the superior mesenteric artery (SMA) is also accessible to DU. DU Applied to the superior mesenteric artery; the method confirms that blood flow in this vessel increases in response to a meal. The objective of this study was to investigate the contribution of different types of meals in increasing blood flow in the SMA, using Doppler ultrasonography as a means of determination the relative potencies of the major nutrient stimuli in healthy human subjects. One hundred healthy volunteers , with age variation (20 -50) years, were examined before and after different two meals type (fatty and carbohydrate), at different intervals (0-90mins), that meals included varying kilocalories (Kcals) and contents (250 gram, 545 Kcal and 270 gram, 477 Kcal) in order to assess (SMA) , diameter DM , blood flow volume BFV,resitive index (RI) and peak systolic velocity (PSV). The study showed that the peak values of DM and BFV of SMA for the fatty, and carbohydrate meal appear at 60 min, and 30 min respectively , after meal taken up to 90 min. There was significant value for the correlation between the varying time with the mean values of DM, and BFV of SMA for fatty and carbohydrate meal. Also the study revealed that there was significant correlation changes in BFV and DM of SMA after intake of the two meals, this changes were significant using paired t-test at p=0.05 with p<0.0001. The researcher concluded that the fatty compared to carbohydrate meal take long time for SMA response songraphically. Researcher revealed that the normal values of SMA for DM, BFV, PSV, and RI were estimated from each correlation factor, and this can be easily applicable and taken as the reference values for each normal health subjects. Researchers recommended that more studies in this field for other abnormal patients. Keywords: Doppler ultrasonography; Superior mesenteric artery flow; diameter DM; Meals.