# A postpartum client delivered a 4,200-gram infant 2 hours ago and is experiencing heavy vaginal bleeding. The nurse assesses a boggy, enlarged uterus that does not respond to fundal massage. Vital signs are: BP 85/55 mmHg, HR 130 bpm, RR 26/min. Which nursing intervention should be implemented first?

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> subject: Maternal Newborn Health

## 문제

A postpartum client delivered a 4,200-gram infant 2 hours ago and is experiencing heavy vaginal bleeding. The nurse assesses a boggy, enlarged uterus that does not respond to fundal massage. Vital signs are: BP 85/55 mmHg, HR 130 bpm, RR 26/min. Which nursing intervention should be implemented first?

The nurse is caring for a postpartum client with uterine atony and hemorrhage who requires immediate intervention to prevent further complications.

## 보기

1. Administer oxygen at 2 L/min via nasal cannula
2. Insert a large-bore IV catheter and begin fluid resuscitation
3. Administer methylergonovine (Methergine) as ordered **✔ 정답**
4. Prepare the client for emergency surgery

**정답: 3**

## 해설

Methylergonovine is the first intervention for uterine atony unresponsive to massage, as it directly stimulates uterine contraction to control bleeding. Other options (oxygen, IV fluids, surgery) are supportive or secondary when pharmacologic measures fail.

## 심화 해설

Understanding the Clinical Scenario

The client is demonstrating classic signs of postpartum hemorrhage (PPH) secondary to uterine atony. The assessment reveals a boggy, enlarged uterus that does not respond to fundal massage, along with heavy vaginal bleeding. The vital signs—BP 85/55 mmHg, HR 130 bpm, and RR 26/min—indicate hypovolemic shock with compensatory tachycardia and tachypnea. The immediate priority is to address the underlying cause of the hemorrhage, which is the lack of uterine muscle tone.

Prioritizing Interventions in Uterine Atony

The management of PPH follows a logical, stepwise progression from less invasive to more invasive measures, always prioritizing interventions that directly target the cause. Since the uterus is not contracting despite fundal massage, the next critical step is pharmacological intervention to stimulate uterine contraction. Methylergonovine (Methergine) is a potent uterotonic agent that causes sustained tetanic uterine contractions, directly compressing the bleeding vessels at the placental site. This directly addresses the pathophysiology of atony, making it the highest priority intervention among the options provided. The narrative review of current guidelines confirms that uterotonics are a cornerstone of first-line management for PPH due to atony [2].

Analyzing the Remaining Options

While the other interventions are all important components of PPH management, they are secondary to administering a uterotonic drug in this specific sequence.

- Option 1 (Administer oxygen): Oxygen administration is a supportive measure to optimize tissue oxygenation in the setting of hypovolemic shock and tachycardia. However, it does not stop the hemorrhage. It is an important concurrent action but not the definitive first intervention to control the bleeding source.

- Option 2 (Insert IV and begin fluid resuscitation): Restoring intravascular volume is critical for managing shock. However, fluid resuscitation alone will not stop the ongoing hemorrhage if the uterus remains atonic. In the stepwise management of PPH, while IV access and fluid replacement are initiated urgently, the administration of uterotonics is the simultaneous and prioritized action to correct the underlying problem. The case report on catastrophic PPH highlights that maximal uterotonic therapy is a key initial step, alongside fluid resuscitation, when managing refractory atony .

- Option 4 (Prepare for emergency surgery): Surgical interventions, such as uterine compression sutures or hysterectomy, are reserved for cases of PPH that are refractory to pharmacological and mechanical interventions. The study on removable uterine compression sutures specifies that these are considered when first-line treatments, including uterotonics, fail to control bleeding . Moving directly to surgery without first attempting a uterotonic drug would be a premature escalation of care.

The rationale for administering methylergonovine first is rooted in the pathophysiology of uterine atony. After delivery, the myometrium must contract to constrict the spiral arteries and halt bleeding from the placental site. A boggy uterus indicates a failure of this physiological mechanism. Fundal massage mechanically stimulates contraction, but when this fails, a pharmacological agent like methylergonovine directly stimulates the myometrial receptors to achieve sustained contraction. This is the most direct and rapid method to control the hemorrhage at its source, preventing further blood loss and the progression of hypovolemic shock. The management of PPH consistently follows this pattern, where mechanical and pharmacological measures to achieve uterine tone are the primary and immediate steps before more invasive surgical options are considered [2,4].References (research sources)

- [2]Management of obstetric and gynecologic hemorrhage: a narrative review of current guidelines and evidence.GuidelineIchim M, Marin AG, Bot M, Borislavschi A, Boiangiu AG, Vladareanu R, Filipescu A. (2026) · DOI: 10.25122/jml-2026-0036

## 임상 시나리오

Clinical Management of Uterine Atony

Uterine atony is the leading cause of postpartum hemorrhage (PPH). The immediate management follows a stepwise approach, prioritizing interventions that directly target the atonic uterus to stop the source of bleeding.

- **Fundal Massage:** The initial mechanical intervention to stimulate contraction. If the uterus remains boggy, proceed to pharmacotherapy.

- **Uterotonic Agents:** First-line pharmacological therapy. Oxytocin is typically the primary agent, but methylergonovine (Methergine) is a potent second-line option for refractory atony, provided there are no contraindications like hypertension. It induces sustained uterine contractions.

- **Fluid Resuscitation:** Simultaneously initiate large-bore IV access and infuse isotonic crystalloids (e.g., Lactated Ringer's) to restore intravascular volume. Blood products are transfused based on ongoing loss and hemodynamic status.

- **Adjunct Measures:** Bimanual uterine compression or intrauterine balloon tamponade (e.g., Bakri balloon) can be used if pharmacotherapy is insufficient.

- **Surgical Intervention:** Escalation to procedures like uterine artery ligation, B-Lynch suture, or hysterectomy is reserved for intractable hemorrhage unresponsive to all previous measures.

Assessment and Monitoring

- Continuously monitor vital signs (BP, HR, RR) and oxygen saturation to assess for worsening hypovolemic shock.

- Assess uterine tone and fundal height every 15 minutes until stable, then per protocol.

- Quantify blood loss by weighing all pads and linens (1 gram = 1 mL blood loss).

- Monitor for adverse effects of methylergonovine, including severe hypertension, headache, and nausea.

Nursing Priorities

The primary nursing responsibility is to recognize PPH and intervene immediately. The sequence is: **Stop the bleeding first** (massage, then medication), then **support circulation** (fluids, oxygen). Delegating tasks to team members for simultaneous intervention is critical for effective resuscitation.

## 핵심 개념

- **Uterine Atony** — Uterine atony. A condition in which the uterine muscles fail to contract effectively after delivery, preventing the blood vessels at the placental attachment site from being compressed and leading to continuous bleeding. The most common cause of postpartum hemorrhage.
- **Methylergonovine** — Methylergonovine. A potent uterine stimulant that directly stimulates uterine smooth muscle to induce strong and sustained contractions. It is contraindicated in patients with hypertension.
- **Postpartum Hemorrhage** — Postpartum hemorrhage. It refers to bleeding of 500mL or more within 24 hours after vaginal delivery, 1000mL or more after cesarean section, or hemodynamic instability due to bleeding.
- **Boggy Uterus** — Soft, boggy uterus. When palpating the uterine fundus, it feels soft and mushy rather than firmly contracted, which is a typical physical examination finding of uterine atony.
- **Fundal Massage** — Fundal massage. A non-pharmacological intervention where one hand is placed above the pubic symphysis and the other hand cups the uterine fundus, massaging in circular motions to stimulate uterine contraction. This is the first step in managing postpartum hemorrhage.

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