Meg,
The way I understand it is the following:
- Preeclampsia is a disease of the placenta. The baby is starting to use the placenta around 12w. This is why some babies do great until 12-14w, but get IUGR after that. This is most sure a sign of preeclampsia.
- Preeclampsia cannot be tested on its own, but having this disease usually causes HBP OR labile HBP (going up and down) and it affects the kidneys: protein in urine. They say that you have preeclamsia when you have HBP higher than 140/90 and protein in urine over 300mg in 24h after 20w. This is a technical definition to help doctors disgnose it. It is symptomatic and it sometimes is an overdiagnose (its a blanket to make sure that none of us will get eclampsia or severe pree unexpectedly)
- The same symptoms can be caused by chronic hypertension, kidney diseases or other problems. These are issues on their own, especially hypertension that can affect the vessels in the placenta and cause the preeclampsia, so they need to be taken just as seriously and treated. They also mean you are at greater risk for preeclampsia. Preeclampsia on top of any of these conditions is called superimposed pree and it's really dangerous. (I imagine that diagnosing superimposed pree, when you already have the HBP and the protein from a previous condition, means that the baby has IUGR or other problems with the placenta or baby, like too little amniotic fluid. These issues are visible on US)
I am not a doctor, I think the above is what I understood about this disease, and I welcome anyone to add more info or correct me if I'm wrong.
Ileana 33
Angel stillborn 24w p-e 2/17/03
