Severe preeclampsia is a condition in which arteriolar spasms occur that result in hypertension and decreased arterial perfusion of the kidneys. This, in turn, causes an alteration in the glomeruli, resulting in oliguria and proteinuria, retention of sodium and water, and finally edema.
Since in the given question it has been given that the pregnant female has 170/110 mm blood pressure and 4+ proteinuria along with edema at extremities and her face this leads us to the conclusion that the client is experiencing Severe preeclampsia.