# A nurse is caring for a client who is midway through a 6-week course of external beam radiation therapy for lung cancer. When assessing for potential life-threatening complications, which nursing intervention is the priority to ensure client safety? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=540657 > language: ko > subject: Adult Health ## 문제 A nurse is caring for a client who is midway through a 6-week course of external beam radiation therapy for lung cancer. When assessing for potential life-threatening complications, which nursing intervention is the priority to ensure client safety? ## 보기 1. Apply thick moisturizing lotion to the radiation site twice daily to prevent skin breakdown 2. Monitor for signs of radiation pneumonitis and report respiratory changes immediately **✔ 정답** 3. Encourage the client to scrub the radiation site gently during daily showers 4. Restrict all visitors to prevent radiation exposure to family members **정답: 2** ## 해설 Monitoring for radiation pneumonitis is the priority because it is a life-threatening complication that can rapidly progress to respiratory failure. Other options address manageable skin care or incorrect visitor restrictions. ## 심화 해설 Understanding the Priority: Life-Threatening Complications of Thoracic Radiation When caring for a client receiving external beam radiation to the chest, the nurse must differentiate between expected side effects and potentially fatal complications. While skin reactions are common, the anatomical location of the treatment field places critical structures like the lungs directly in the path of the radiation beam. The priority nursing intervention must target the assessment and early detection of complications that can rapidly progress to respiratory failure. Radiation pneumonitis is an acute inflammatory reaction of the lung tissue to radiation damage. It is not an infection but a direct toxic effect on type II pneumocytes and vascular endothelial cells. The injury triggers a cascade of pro-inflammatory cytokines, leading to alveolar exudate, impaired gas exchange, and clinical symptoms such as dry cough, dyspnea, and low-grade fever. This condition typically develops 4 to 12 weeks after completing therapy, but onset can occur during treatment, particularly in frail patients. Symptomatic radiation pneumonitis (SRP) can deteriorate quickly, making continuous respiratory assessment the cornerstone of safe nursing care during a course of thoracic radiotherapy. [1] Research has identified that a patient's baseline physiological reserve significantly influences the risk of developing this complication. A study classifying patients with lung cancer undergoing radiotherapy found that those with a specific frailty profile characterized by exhaustion, low physical activity, and high nutritional risk (NRS-2002 score) had a significantly higher incidence of SRP. This underscores that the client's systemic condition directly modulates the local inflammatory response in the lung. Therefore, a nurse's assessment must extend beyond the respiratory system to include subtle signs of declining functional status, as these may herald the onset of a severe pulmonary event. [1] The biological mechanism linking radiation to lung injury involves a systemic inflammatory response. Radiation activates inflammatory markers that promote inflammation in the lung, a process that can lead to both radiation pneumonitis in the acute phase and radiation fibrosis (RF) as a late effect. The connection between this inflammatory cascade and clinical outcomes is so profound that specific markers are being explored for their potential to predict not only lung toxicity but also overall survival. This evidence reinforces why monitoring for respiratory changes is not just a task, but a critical safety intervention that directly addresses a known, inflammation-driven, life-threatening pathway. [2] Analysis of Incorrect Options The other options represent either incorrect or lower-priority actions that do not address the most immediate threat to life. - **Option 1:** Applying thick moisturizing lotion to the radiation site is generally contraindicated unless specifically prescribed by the radiation oncology team. Many lotions contain metals or other compounds that can alter the dose distribution of the radiation beam, potentially increasing skin irritation. Even if a prescribed product is used, the timing is critical; it is often avoided in the 4 hours before a treatment. More importantly, preventing skin breakdown, while a valid comfort and infection-prevention measure, does not take priority over monitoring for a life-threatening pulmonary complication. - **Option 3:** Instructing a client to scrub the radiation site is harmful. The skin in the treatment field is fragile and must be handled gently. Scrubbing can cause mechanical trauma, disrupt the healing epidermis, and create a portal for infection. The markings placed on the skin for treatment alignment must also be preserved, not scrubbed away. This action would increase the risk of skin integrity impairment. - **Option 4:** Restricting all visitors is unnecessary and based on a misconception. External beam radiation therapy does not make the client radioactive. The radiation is delivered in a fraction of a second and does not remain in the body. There is no risk of radiation exposure to family members from proximity or touch. Implementing such a restriction would cause social isolation without any safety benefit. The nurse's priority is to recognize that the inflammatory processes triggered by radiation are not confined to the tumor target but affect surrounding healthy tissue, most critically the lungs. A client midway through a 6-week course is approaching the cumulative dose threshold where the risk of pneumonitis begins to rise sharply. The nursing intervention of highest priority is therefore vigilant monitoring for early signs—such as a new or worsening cough, dyspnea on exertion, or subtle auscultation changes like fine crackles—and ensuring these findings are reported immediately to prevent progression to acute respiratory distress syndrome. [1][2] References (research sources) - [1]Frailty profiles and symptomatic radiation pneumonitis in patients with lung cancer undergoing radiotherapy: A latent class analysis.Research articleZhang J, Zhao X, Li S, Liao J, Xu L, Fei Y, Wu J, Guan Q. (2026) · DOI: 10.1016/j.apjon.2025.100840 - [2]Inflammatory Markers Associated With Radiation-Induced Lung Injury, Metastasis and Mortality After Breast Cancer Treatment.Research articleKarlsen J, Giskeødegård G, Tandstad T, Salvesen Ø, Wethal T, Reidunsdatter RJ. (2025) · DOI: 10.1016/j.adro.2025.101894 ## 임상 시나리오 Thoracic Radiation: Priority AssessmentDetecting Life-Threatening Pneumonitis The priority during chest radiation is monitoring for radiation pneumonitis, an inflammatory response that can occur 4 to 12 weeks post-therapy or even during treatment. Early signs include dry cough, dyspnea, and low-grade fever. Skin care must avoid trauma: do not scrub the site or apply thick lotions before sessions. Use lukewarm water and pat dry. External beam radiation does not make the patient radioactive; no visitor restrictions are needed for radiation exposure. CautionRadiation pneumonitis is not an infection but a direct toxic injury. Do not delay reporting respiratory changes; it can rapidly progress to respiratory failure. ## 핵심 개념 - **Radiation Pneumonitis** — An acute inflammatory reaction of lung tissue caused by radiation damage to type II pneumocytes and vascular endothelial cells, leading to impaired gas exchange. - **External Beam Radiation Therapy (EBRT)** — A method of delivering high-energy beams from outside the body to a localized tumor; the patient does not emit radiation and is not a hazard to others. - **Type II Pneumocytes** — Cuboidal epithelial cells in the alveoli responsible for surfactant production and repair of the alveolar epithelium; highly sensitive to radiation injury. ## 같은 주제 문제 - [A nurse is caring for a client receiving external beam radiation therapy for lung cancer. …](https://mymerci.kr/pages/nclex_q.php?qn_id=540653) - [A nurse is caring for a client receiving external beam radiation therapy for lung cancer. …](https://mymerci.kr/pages/nclex_q.php?qn_id=540654) - [A nurse is caring for a client receiving external beam radiation therapy for lung cancer. …](https://mymerci.kr/pages/nclex_q.php?qn_id=540655) - [A nurse is caring for a client receiving external beam radiation therapy for lung cancer. …](https://mymerci.kr/pages/nclex_q.php?qn_id=540656) - [A nurse is assessing a 65-year-old client in the outpatient clinic 3 weeks after completin…](https://mymerci.kr/pages/nclex_q.php?qn_id=540658) - [A nurse is assessing a patient who completed external beam radiation therapy for lung canc…](https://mymerci.kr/pages/nclex_q.php?qn_id=540659) --- More free questions: [기출문제](https://mymerci.kr/) _학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._