# 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? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=540710 > language: ko > subject: Adult Health ## 문제 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? ## 보기 1. Encourage early ambulation within 6 hours post-surgery. 2. Position the affected arm elevated on pillows above heart level **✔ 정답** 3. Apply ice packs to the surgical site for 20 minutes every hour 4. Begin range-of-motion exercises for the affected shoulder immediately **정답: 2** ## 해설 Positioning the affected arm elevated above heart level is the priority intervention to prevent lymphedema and promote lymphatic drainage following axillary lymph node dissection. The top-priority nursing intervention after modified radical mastectomy and axillary lymph node dissection is to support the affected arm on a pillow so it is raised above the heart. This position is crucial for preventing lymphedema and promoting lymphatic drainage. Axillary lymph node dissection disrupts the arm's normal lymphatic drainage system, greatly increasing the risk of developing lymphedema. Lymphedema is a chronic condition where protein-rich fluid accumulates in the tissue spaces, causing progressive swelling, discomfort, and functional impairment. Elevating the affected arm above the heart uses gravity to assist venous return and lymphatic drainage, reducing the risk of fluid buildup. Arm elevation should be maintained consistently right after surgery, typically for the first 24–48 hours. The arm must be well supported with pillows so it does not hang down. This intervention minimizes swelling formation, reduces pain and discomfort, and promotes optimal healing of the surgical site. Early ambulation is important for preventing complications like deep vein thrombosis or pneumonia, but it is not the immediate priority in the first few hours after surgery. Ice packs may be used for pain management but are not the primary intervention for lymphedema prevention. Range-of-motion exercises are contraindicated immediately after surgery because they can damage suture lines and increase bleeding risk; they are usually started 24–48 hours later under medical guidance. ## 심화 해설 Understanding the Immediate Postoperative Priority Following a modified radical mastectomy (MRM), the immediate postoperative period is critical for preventing complications and promoting healing. The surgery involves the removal of breast tissue and axillary lymph node dissection, which disrupts lymphatic channels and places the patient at high risk for a serious complication: lymphedema. The provided source emphasizes that lymphedema is a severe post-mastectomy complication causing significant morbidity, making its prevention a crucial nursing responsibility from the very start of recovery [1]. Analysis of the Correct Intervention The priority nursing intervention is to position the affected arm elevated on pillows above heart level. This is the foundational, non-pharmacological measure to promote lymphatic and venous return from the surgical site. The physiological rationale is straightforward: gravity assists in draining the excess fluid that accumulates due to the surgical disruption of lymph channels. By elevating the arm, you reduce hydrostatic pressure in the capillaries and facilitate the flow of lymph and blood back toward the central circulation, directly mitigating the risk of fluid stasis and subsequent lymphedema. This intervention aligns perfectly with the study’s focus on the necessity of lymphedema prevention strategies to improve long-term quality of life [1]. Why Other Options Are Not the Priority - Option 1: Encourage early ambulation within 6 hours post-surgery. While early ambulation is a vital component of postoperative recovery to prevent complications like atelectasis and venous thromboembolism, it is not the most critical intervention for the arm itself. Ambulation does not directly address the localized risk of lymphedema in the affected extremity, which is the primary concern specific to this surgery [1]. - Option 3: Apply ice packs to the surgical site for 20 minutes every hour. The application of ice is generally contraindicated in the immediate post-mastectomy period. The surgery compromises both vascular and lymphatic systems; vasoconstriction from ice can further impair an already fragile circulation to the skin flaps and may mask important assessments of sensation and blood flow. The priority is to promote drainage, not vasoconstriction. - Option 4: Begin range-of-motion exercises for the affected shoulder immediately. While restoring shoulder mobility is an important long-term goal, aggressive or immediate range-of-motion exercises are not initiated right after surgery. Premature exercise can disrupt suture lines, increase seroma formation, and exacerbate fluid accumulation in the tissues before the lymphatic system has begun to compensate. The study underscores the importance of education on lymphedema prevention, which includes a gradual, controlled progression of exercises, not immediate initiation [1]. Connecting the Evidence to Clinical Practice The study by Natarajan et al. validates the critical nature of this nursing action by investigating an educational intervention specifically designed to teach post-mastectomy women how to prevent arm lymphedema [1]. The fact that a structured teaching session is necessary highlights that these preventive measures, including proper arm positioning, are not inherently known to patients and must be deliberately implemented and taught by nurses. The immediate postoperative application of arm elevation is the first practical step in the lymphedema prevention protocol that patients will later need to learn and continue at home. By prioritizing this intervention, you are directly applying the core principle identified in the research: that proactive, knowledge-based care starting immediately after surgery is essential to reduce the long-term morbidity of lymphedema [1].References (research sources) - [1]Effectiveness of Pre-discharge Educational Intervention Session in the Prevention of Arm Lymphedema Among Post-mastectomy Women in a Teaching Hospital in Bangalore, India.Research articleNatarajan MK, S J N, Mohanraj J, Vishwanath U. (2023) · DOI: 10.7759/cureus.41335 ## 임상 시나리오 Post-Mastectomy Arm PositioningImmediate Lymphedema Prevention The highest priority after a modified radical mastectomy with axillary dissection is preventing lymphedema. Position the affected arm on pillows so it is elevated above heart level. This uses gravity to promote lymphatic drainage and venous return, reducing fluid accumulation at the surgical site. CautionDo not begin active or passive range-of-motion exercises immediately. These are typically delayed until surgical drains are removed to prevent seroma formation and wound disruption. Avoid applying ice packs unless specifically ordered, as vasoconstriction can impair flap healing. ## 핵심 개념 - **Lymphedema** — Tissue swelling caused by an accumulation of protein-rich fluid due to compromised lymphatic drainage, a common complication after axillary lymph node dissection. - **Modified Radical Mastectomy (MRM)** — Surgical removal of the entire breast, including the nipple-areolar complex, and axillary lymph node dissection, while preserving the pectoralis major muscle. - **Axillary Lymph Node Dissection** — Surgical removal of lymph nodes from the armpit area, which disrupts normal lymphatic channels and increases the risk of postoperative lymphedema. - **Venous Return** — The flow of blood back to the heart; elevation of an extremity uses gravity to facilitate this process, reducing edema. - **Hydrostatic Pressure** — The pressure exerted by a fluid at equilibrium due to the force of gravity; elevation reduces capillary hydrostatic pressure, minimizing fluid filtration into tissues. ## 같은 주제 문제 - [A 45-year-old woman presents to the clinic for a routine mammogram follow-up. 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