Inflammatory process in the appendix alters its normal ehotraficheskuyu characteristic. First of all, it decreases displaceability appears rigidity (can not be compressed), significantly transformed its internal structure, changing the diameter. Together, these factors contribute to a more favorable environment for the determination process on the background peristaltiruyuschih, flexible (subject to compression) bowel loops.
In addition, the presence of effusion (in mezhpetlevyh spaces projected right lateral canal and pelvis), often accompanying protsessuv acute abdomen, especially in children, creates additional conditions contrasting increased in size fixed inflamed appendix. Echographic semiotics amended appendix is very variable and depends strongly on the nature of the inflammation. The greatest difficulty is identifying reliable echographic semiotics catarrhal form of acute appendicitis in children.
This is probably due to the fact that in catarrh of the changes affect only the serous and mucous membranes of the appendix, accompanied by moderate erythema, slight strengthening of vascular pattern, edema of its mucosa, which in most cases does not have a reflection in the ultrasound picture. More meaningful and accurate information regarding the diagnostic gives echographic study with abscess, gangrenous and gangrenous – perforated forms of acute appendicitis. Phlegmonous amended appendix echografically is not amenable to compression aperistalticheskuyu, tubular or concentrically layered structure.