Pph
Reading File
Finding Sources
Searching PubMed
"postpartum hemorrhage" management
Reading File
Reading File
Finding Sources
Finding Sources
Reading File
Finding Sources
Reading File
Here is a comprehensive overview of Postpartum Hemorrhage (PPH):
Postpartum Hemorrhage (PPH)
Definition
PPH is traditionally defined as:
- >500 mL blood loss after vaginal delivery
- >1000 mL blood loss after cesarean delivery
- OR any blood loss causing signs/symptoms of hemodynamic instability, regardless of the volume
Primary (early) PPH: within the first 24 hours of delivery
Secondary (late) PPH: 24 hours to 6 weeks after delivery
Note: Due to physiologic adaptations of pregnancy (plasma volume increases ~40%, RBC volume ~25%), a patient may not show signs of shock until >1,500 mL of blood has been lost, and blood pressure may not drop until >30% of total blood volume is gone.
Causes - "The 4 Ts"
| T | Cause | Frequency |
|---|---|---|
| Tone | Uterine atony | 75-90% of cases |
| Trauma | Lacerations (cervix, vagina, perineum, uterus), uterine rupture, uterine inversion | ~20% |
| Tissue | Retained placental fragments, placenta accreta | ~10% |
| Thrombin | Coagulopathy (hereditary or acquired DIC) | Uncommon |
Uterine Atony
The most common cause. The postpartum uterus fails to contract, and spiral arteries at the placental implantation site continue to bleed. On exam: soft, boggy uterus.
Risk factors:
- Uterine overdistention (multiple gestation, macrosomia, polyhydramnios)
- Prolonged or rapid labor
- Chorioamnionitis / intrauterine infection
- High parity (multiparity)
- Use of tocolytics or halogenated anesthetic agents
- Oxytocin use during labor
- Preeclampsia
- General anesthesia
Lacerations (Birth Trauma)
Second most common cause. Tear classification:
- 1st degree: skin and vaginal mucosa only
- 2nd degree: into fascia and perineal body muscles
- 3rd degree: into the anal sphincter
- 4th degree: through all layers including rectal mucosa (requires OR repair)
Contained hematomas under the epithelium may go unrecognized for hours and cause hemorrhagic shock.
Retained Products of Conception
Retained placental fragments (~10% of PPH). May require manual removal or dilation and curettage.
Secondary PPH causes
Infection, subinvolution at the placental site, retained placental fragments, hereditary coagulopathy.
Risk Factors
| Cesarean delivery PPH risk | Vaginal delivery PPH risk |
|---|---|
| Preeclampsia | Uterine overdistension |
| Disorders of active labor | Prolonged/rapid labor |
| Previous hemorrhage history | High parity |
| General anesthesia | Macrosomia |
| Obesity | Chorioamnionitis |
| Intraamniotic infection | Use of tocolytics |
Initial Assessment & Resuscitation
- Monitor vital signs closely; early sign is a mild increase in HR
- Establish large-bore IV access (x2)
- Aggressive IV fluid resuscitation (lactated Ringer's)
- Blood: type & crossmatch; prepare packed RBCs (use O-negative in true emergency)
- Labs: CBC, fibrinogen, fibrin split products, PT/PTT, platelet count
- Supplemental oxygen
- Bedside ultrasound to identify retained placenta or intrauterine clots
Management
Step 1 - Uterine Massage + Uterotonics
- Bimanual uterine compression/massage: one hand in anterior fornix, one suprapubically
- Oxytocin (first-line):
- IM: 10 units after placental delivery
- IV: 5-10 units bolus slowly, then infusion of 10-40 units in 1L at up to 100 mU/min
- Avoid rapid IV bolus (causes hypotension)
- Watch for fluid overload (antidiuretic effect)
Step 2 - Second-line Uterotonics (if oxytocin fails)
| Drug | Dose/Route | Contraindications |
|---|---|---|
| Methylergonovine (Methergine) | 0.2 mg IM q2-4h | Hypertension, preeclampsia (causes vasoconstriction) |
| Carboprost (15-methyl PGF2α, Hemabate) | 0.25 mg IM q15-90 min (max 8 doses) | Asthma, cardiovascular disease |
| Misoprostol (PGE1) | 800-1000 μg rectal/intravaginal | - |
Step 3 - Mechanical & Procedural Measures
- Uterine balloon tamponade (Bakri balloon, Foley catheter) - especially for low placental implantation sites
- Uterine packing with sterile gauze
- Repair lacerations (first/second degree bedside; 3rd/4th in OR)
Step 4 - Interventional & Surgical
- Selective pelvic arterial embolization (where available)
- Laparotomy with:
- Arterial ligation (uterine artery, internal iliac artery)
- B-Lynch compression sutures
- Peripartum hysterectomy (last resort for refractory hemorrhage)
Prevention
Active management of the third stage of labor (AMTSL) reduces PPH by approximately two-thirds:
- Early administration of oxytocin after delivery of the anterior shoulder
- Controlled cord traction
- Early cord clamping and cutting
In women with risk factors, ensure adequate IV access is established before delivery.
Recent Evidence
A 2025 Cochrane Network Meta-Analysis (PMID 40237648) updated the comparative effectiveness of uterotonic agents for preventing PPH. A 2025 Cochrane systematic review (PMID 39911088) addressed transfusion of blood products in PPH management. These may refine current first-line agent preferences and transfusion thresholds beyond what older textbooks describe.
Sources: Creasy & Resnik's Maternal-Fetal Medicine; Rosen's Emergency Medicine; Tintinalli's Emergency Medicine; Textbook of Family Medicine 9e
Prepare a lecture for mbbs students on topic abortion using recent guidelines
Asking for Preferences
Reading File
Finding Sources
Searching PubMed
"abortion" management guidelines
Searching the Web
WHO ACOG FIGO abortion guidelines 2024 2025 medical management
Reading File
Reading File
Reading File
Running Command
Writing File
Running Command
You've run out of free credits. Sign up for a free account to continue using Orris.
This is a shared conversation. Sign in to Orris to start your own chat.