They are enlarged to the size of an almond, rounded, firm and pink; there is some engorgement and oedema on section; the substance is rather soft, and can be scraped off with a knife.
This is due to intense engorgement of the vessels brought about through these minute existing collateral channels and results in a peripheral congested zone round the infarct.
This collateral supply not being sufficient to keep up the proper flow of blood through the part the veins tend to become thrombosed, thus increasing the engorgement.
There is general engorgement and oedema of the lungs, with pneumonic patches varying in size and irregularly distributed.
The hand and foot models relieve the pressure from engorgement in the early months and help prep the breasts before feeding.