Amniotic fluid embolism causes :
First, I need to recall the core concept. AFE occurs when amniotic fluid, fetal cells, or other debris enter the maternal circulation, leading to an acute reaction. This typically triggers anaphylactoid reactions and disseminated intravascular coagulation (DIC). The main consequences are cardiovascular collapse, respiratory failure, and coagulopathy.
The correct answer would likely be something like "Acute pulmonary edema and shock" or "DIC and maternal death." Since the options aren't given, I have to consider standard multiple-choice options for AFE. Common distractors might include things like placental abruption, preeclampsia, or uterine rupture. Let's assume the options are something like:
A. Placental abruption
B. DIC
C. Preeclampsia
D. Uterine rupture
In that case, the correct answer would be B. DIC. AFE leads to DIC because the amniotic fluid contains substances that activate the coagulation cascade, causing widespread clotting and subsequent bleeding. The other options are not directly caused by AFE. Placental abruption is a cause of AFE but not a result. Preeclampsia is a separate condition. Uterine rupture is a different obstetric emergency.
Now, structuring the explanation. The core concept is the pathophysiology of AFE. The correct answer is DIC because of the activation of coagulation pathways. Each incorrect option needs to be explained as not being a consequence of AFE. The clinical pearl would be to remember that AFE leads to acute hypotension, respiratory distress, and DIC, which are key in managing the patient.
I need to make sure the explanation is concise, covers all the required sections, and uses the right terminology. Also, check the character count to stay within the limit. Let me put it all together now.
**Core Concept**
Amniotic fluid embolism (AFE) is a life-threatening obstetric emergency caused by maternal systemic inflammatory response and consumptive coagulopathy following entry of amniotic fluid, fetal cells, or debris into the maternal circulation. It triggers **acute pulmonary hypertension**, **cardiovascular collapse**, and **disseminated intravascular coagulation (DIC)**.
**Why the Correct Answer is Right**
AFE initiates a cascade via **activation of the intrinsic coagulation pathway** (Factor XII) by amniotic fluid components, leading to microthrombi formation. Simultaneously, **massive release of histamine and cytokines** (e.g., TNF-Ξ±) causes acute pulmonary vasoconstriction and capillary leak. This dual mechanism results in **acute respiratory failure, hypotension, and consumptive coagulopathy (DIC)**, which are hallmark clinical features.
**Why Each Wrong Option is Incorrect**
**Option A:** Placental abruption *can cause* AFE but is not a consequence.
**Option C:** Preecl