In the development of an abscess periappendikulyarnogo depending on the severity of his capsule distinguish 3 stages:
1) PAA-1 – a collection of pus around the destructive changes of the appendix, a loose demarcation of local inflammation infiltrated tissues, the presence of delicate fibrinous deposits.
2) PAA-2 – presence of severe capsule abscess, the walls of which is flexible.
3) PAA-3 – the presence of capsules ulcer with dense rigid walls.
In children, the most frequently observed PAA PAA -1 and -2 because of the weaker ductile properties of the peritoneum, and the rapid transition to a local inflammatory process spills when upon reaching a certain pressure within the abscess breakthrough occurs capsules ulcer and abdominal infections. An ultrasound study of children with clinical manifestations of RAP in most cases possible to identify some clinical and sonographic parallels, allowing even preoperative determine the stage of the pathological process in the abdominal cavity. At the initial stage of RAP in the preoperative period, most children identified sonographic admit!
Inflammatory transformation of the appendix (abscess, gangrenous and gangrene – nozno – perforated) without reliable echo signs of change periappendikulyarnyh structures. All children have a moderate accumulation of free fluid in mezhpetlevyh spaces directly adjacent to the appendix (in the form of thin aneho – gene bars), and in the pelvis behind the bladder. Echographic signs of inflammatory changes in the bowel loops visible in RAP-1 in most cases is not marked.