What is the bleeding pattern in Placenta Previa?

Punjab CHO - 2021

Obstetrics & Gynaecology

Easy

Appeared in: Punjab CHO - 2021

Explanation

The hallmark sign of placenta previa is the sudden onset of painless, bright-red vaginal bleeding.
This occurs because the placenta is implanted in the lower uterine segment, which begins to stretch and dilate in late pregnancy.
As the lower segment changes, the inelastic placenta shears away from the uterine wall, causing bleeding.
The bleeding is painless because the lower uterine segment has poor muscle contractility and does not become irritated or tender, unlike the upper segment.
The blood is bright red because it is fresh arterial bleeding from the separated placental site.

Option B: Painful bleeding is the classic sign of Abruptio Placentae, not Placenta Previa. The pain in abruption is caused by uterine muscle irritation from the separating placenta and accumulating blood.
Option C: Concealed bleeding, where blood is trapped behind the placenta with no external bleeding, is a type of Abruptio Placentae. In Placenta Previa, the bleeding is almost always revealed (external) due to the placenta's proximity to the cervical os.
Option D: Mixed bleeding, a combination of concealed and revealed hemorrhage, is also a pattern seen in Abruptio Placentae, not Placenta Previa.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical presentation of Placenta Previa as background academic context rather than a clinical decision trigger.
The most critical nursing action for any antepartum bleeding is to rule out Placenta Previa before performing any vaginal examinations. A digital or speculum exam can cause catastrophic hemorrhage.
Immediate management includes assessing maternal vital signs and fetal heart rate, establishing large-bore IV access for potential fluid and blood resuscitation, and preparing for an emergency cesarean section.
Patient education should focus on recognizing the signs of bleeding and seeking immediate medical care. For diagnosed cases managed as outpatients, instructions include pelvic rest (no sexual intercourse) and immediate return to the hospital if bleeding occurs.

How to Approach the Question

First, identify the key term in the question: 'Placenta Previa'.
Recall the classic signs and symptoms associated with this condition. The primary symptom is vaginal bleeding.
Focus on the specific characteristic of the bleeding. The mnemonic for placenta previa bleeding is that it is 'painless, causeless, and recurrent'.
Evaluate the options based on this knowledge. 'Painless bleeding' directly matches the classic description.
Differentiate this from the other major cause of antepartum hemorrhage, Abruptio Placentae, which is characterized by painful bleeding. This helps confirm why the other options are incorrect.

Concept Tested & Keywords

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E6 Obstetrics Williams pp. 71-95, 68-93

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 19-27