What is a critical sign of preeclampsia in a pregnant patient?

High blood pressure is a critical sign of preeclampsia, a condition that can develop during pregnancy. Preeclampsia is characterized by the onset of hypertension and often accompanies proteinuria (the presence of excess protein in the urine), which signifies kidney involvement. Monitoring blood pressure is essential in pregnancy because elevated levels can lead to severe complications for both the mother and the fetus, including potential progression to eclampsia, a life-threatening condition.

While weight gain, dark urine, and headaches may be associated with various pregnancy-related issues, they are not definitive indicators of preeclampsia. Weight gain can result from numerous factors, including normal physiological changes in pregnancy, and dark urine may indicate dehydration or other issues not specific to preeclampsia. Headaches, while they can be a symptom of preeclampsia, are also common in pregnant women for various reasons and do not serve as a standalone critical sign. High blood pressure stands out as the primary and most significant sign that healthcare providers closely monitor to diagnose and manage preeclampsia effectively.