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.
