A 60-year-old woman with newly diagnosed invasive ductal carcinoma of the right breast is scheduled for a modified radical mastectomy. Which nursing intervention should be prioritized in the immediate postoperative period?

Positioning the affected arm elevated above heart level is the priority intervention to prevent lymphedema and promote lymphatic drainage following axillary lymph node dissection.

Core Nursing Explanation Key Concept Analysis: This question assesses the priority nursing intervention for a patient immediately after a Modified Radical Mastectomy (MRM). The core nursing goal in the immediate postoperative period is to prevent complications, with a major focus on minimizing the risk of Lymphedema and promoting wound healing. The surgery involves removal of breast tissue, underlying pectoralis minor muscle, and most importantly, an Axillary Lymph Node Dissection (ALND). This disrupts the normal lymphatic drainage pathway from the arm, making fluid accumulation a significant risk.

Answer Rationale: Key Point! Elevating the affected arm on pillows above the level of the heart is the priority. This positioning utilizes gravity to facilitate venous and lymphatic return from the arm, reducing swelling (edema), promoting drainage of serosanguinous fluid, and decreasing pain at the surgical site. It is a foundational, non-invasive intervention that directly addresses the primary physiological alteration caused by the surgery. This intervention should be initiated in the post-anesthesia care unit (PACU) and maintained.

Distractor Analysis:
Watch out for confusion! Option ① (Early ambulation) is important for preventing deep vein thrombosis (DVT) and atelectasis, but it is not the immediate priority over managing the surgical site and preventing lymphedema. Ambulation is typically encouraged on the first postoperative day.
Option ③ (Ice packs) might be used for pain and swelling in other types of surgery, but for a mastectomy, it is not standard immediate care. The primary concern is promoting drainage, not constricting vessels with cold, which could be less effective than elevation.
Option ④ (Immediate ROM exercises) is contraindicated in the immediate postoperative period. Early, aggressive movement can disrupt the surgical site, increase bleeding risk, and impair healing. Active and passive ROM exercises are initiated gradually, often after drains are removed, under specific guidance.

Related Concepts: Post-mastectomy care also includes monitoring and managing surgical drains (e.g., Jackson-Pratt drains), assessing for signs of infection or hematoma, providing emotional support due to body image changes, and planning for future interventions like physical therapy, prosthesis fitting, or reconstruction.

Nursing Clinical Practice Guide Clinical Scenario: You are the nurse receiving Mrs. Johnson, a 60-year-old patient, from the PACU after her right modified radical mastectomy. She is awake but drowsy, with a Jackson-Pratt drain in place, and her right arm is lying at her side.

Nursing Intervention Strategy: 1. Assessment: Perform a focused assessment: Check vital signs, assess respiratory status (risk of pneumothorax if chest wall was involved), evaluate pain level, inspect the dressing for bleeding or drainage, and check the neurovascular status of the affected arm (color, warmth, sensation, capillary refill, radial pulse). 2. Priority Action: Immediately position her right arm on 2-3 pillows, ensuring the entire arm from fingers to axilla is supported and elevated above the level of the heart. Educate the patient and family on the importance of maintaining this position. 3. Ongoing Care: Monitor drain output (color, amount, consistency). Empty drains as per protocol, maintaining suction. Administer analgesics as ordered. Begin deep breathing and coughing exercises to prevent pulmonary complications. 4. Patient Education & Discharge Planning: Teach arm precautions to prevent lymphedema long-term (no blood pressure measurements, injections, or IVs in the affected arm; avoid heavy lifting; protect from injury and sunburn). Discuss the schedule for initiating gentle ROM exercises.

Patient Safety and Precautions: Never use the affected arm for blood draws or blood pressure checks. Monitor closely for signs of infection (fever, redness, purulent drainage) or hematoma (swelling, bruising, increased pain). Ensure the patient avoids sleeping on the affected side.

Nursing Procedure & Medication Flow Drain Care: Maintain closed suction. Record output every shift. Drains are typically removed when output is less than 30 mL per 24 hours. Use aseptic technique when emptying. Pain Management: Administer IV or oral analgesics on a scheduled basis initially to control pain, which facilitates deep breathing and early movement.

A Word from Your Senior Nurse "Positioning is one of the simplest yet most powerful tools in a nurse's arsenal. After a mastectomy, that elevated arm does more than just prevent swelling—it sets the stage for the patient's entire recovery and quality of life by minimizing the risk of chronic lymphedema. In clinical practice, you'll be the one to reinforce this teaching every time you reposition the patient. On the NCLEX, they love to test your ability to sequence care: what comes first? Always think 'Safety and Prevention of Complications' first. Here, gravity is your first-line treatment!"