Placenta Previa

1. INTRODUCTION

Placenta previa is an obstetric complication in which the placenta is implanted in the lower uterine segment, partially or completely covering the cervical opening.

2. DEFINITION

Placenta previa is a condition where the placenta lies wholly or partially in the lower uterine segment, interfering with the normal vaginal delivery.

3. TYPES Of PLACENTA PREVIA

• Type I (Low-lying placenta)

Placenta in lower segment but not reaching os

• Type II (Marginal placenta previa)

Placenta reaches internal os but does not cover it

• Type III (Partial placenta previa)

Placenta partially covers os

• Type IV (Complete placenta previa)

Placenta completely covers os

4. CAUSES / RISK FACTORS

• Previous cesarean section

• Previous placenta previa

• Multiparity

• Multiple pregnancy

• Advanced maternal age

• Uterine scars or abnormalities

  
  

5. PATHOPHYSIOLOGY

• Placenta implants in lower uterine segment

• Lower segment stretches in late pregnancy

• Placenta separates → bleeding occurs

  
  

6. CLINICAL MANIFESTATIONS

• Painless vaginal bleeding (bright red)

• Occurs in 3rd trimester

• Recurrent bleeding episodes

• Soft, non-tender uterus

• Fetal malpresentation (breech/transverse)

  
  

7. COMPLICATIONS

Maternal

• Hemorrhage

• Shock

• Anemia

• Infection

Fetal

• Prematurity

• Low birth weight

• Fetal distress

• Perinatal death

  
  

8. DIAGNOSIS / EVALUATION

Clinical

• Painless bleeding

• No abdominal pain

Ultrasound (Key)

• Confirms placental position

⚠️ Important:

• Digital vaginal examination is contraindicated (may cause severe bleeding)

  
  

9. MANAGEMENT

A. Expectant (Conservative) Management

(If bleeding is mild & fetus premature)

• Bed rest

• Avoid intercourse

• Monitor vitals & fetal condition

• Blood transfusion if needed

B. Active Management

• Indications

• Heavy bleeding

• Fetal maturity

• Maternal instability

  
  

TREATMENT

• Cesarean section (preferred)

• Vaginal delivery only in Type I & some Type II

  
  

10. NURSING MANAGEMENT

Assessment

• Monitor bleeding

• Check vital signs

• Fetal heart monitoring

Interventions

• Maintain bed rest

• Prepare for emergency C-section

• Provide emotional support

11. HEALTH EDUCATION

• Avoid heavy work & intercourse

• Report bleeding immediately

• Regular antenatal check-ups

  Here’s a short “exam trick” version for Coronary Artery Disease — super quick points you can remember

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🚀Here’s a short “exam trick” version for placenta prvevia — super quick points you can remember

definition

Placenta previa is a condition where the placenta is located in the lower uterine segment, partially or completely covering the cervical os.

Types

• Type I – Low-lying

• Type II – Marginal

• Type III – Partial

• Type IV – Complete

  
  

Causes / Risk Factors

• Previous C-section

• Multiparity

• Advanced maternal age

• Multiple pregnancy

  
  

Clinical Features

• Painless vaginal bleeding (bright red)

• Third trimester bleeding

• Soft, non-tender uterus

• Malpresentation

  
  

Complications

• Hemorrhage

• Shock

• Anemia

• Prematurity

  
  

Diagnosis

• Ultrasound (USG) → confirms position

• ⚠️ No vaginal examination

  
  

Management

• Bed rest (mild cases)

• Blood transfusion if needed

• Cesarean section (main treatment)

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🚀 Here’s a set of 07 MCQs on Placenta prvevia for practice:

1️⃣Placenta previa is defined as:

A. Placenta attached to upper segment

B. Placenta covering lower uterine segment

C. Placenta detached early

D. Placenta outside uterus

✅ Answer: B

2️⃣ The most common symptom of placenta previa is:

A. Painful bleeding

B. Painless vaginal bleeding

C. Fever

D. Abdominal pain

✅ Answer: B

3️⃣ Placenta previa bleeding usually occurs in:

A. First trimester

B. Second trimester

C. Third trimester

D. During labor only

✅ Answer: C

4️⃣. Which examination is contraindicated in placenta previa?

A. Abdominal examination

B. Ultrasound

C. Vaginal (PV) examination

D. Blood test

✅ Answer: C

5️⃣The investigation of choice for placenta previa :

A. X-ray

B. MRI

C. Ultrasound

D. CT scan

✅ Answer: C

6️⃣ The most appropriate mode of delivery in complete placenta previa is:

A. Normal vaginal delivery

B. Forceps delivery

C. Cesarean section

D. Vacuum delivery

✅ Answer: C

7️⃣A common fetal complication of placenta previa is:

A. Macrosomia

B. Prematurity

C. Jaundice

D. Congenital anomaly

✅ Answer: B