# A nurse is assessing a 35-year-old patient with chronic low back pain who has been taking opioid medication for 6 months. Which assessment finding would be the MOST concerning and require immediate nursing intervention?

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## 문제

A nurse is assessing a 35-year-old patient with chronic low back pain who has been taking opioid medication for 6 months. Which assessment finding would be the MOST concerning and require immediate nursing intervention?

## 보기

1. Respiratory rate of 8 breaths per minute with shallow breathing pattern **✔ 정답**
2. Patient reports pain level of 7/10 despite medication administration 2 hours ago
3. Mild constipation with last bowel movement 2 days ago
4. Patient appears drowsy but is easily aroused when called by name

**정답: 1**

## 해설

Respiratory rate of 8 breaths per minute with shallow breathing indicates life-threatening opioid-induced respiratory depression requiring immediate intervention. Other findings are common side effects or less urgent concerns in chronic pain management.

## 심화 해설

Critical Assessment Finding in Chronic Opioid Therapy

When monitoring a patient on long-term opioid therapy, the nurse must prioritize physiological stability using the airway, breathing, and circulation (ABC) framework. Among the listed findings, a respiratory rate of 8 breaths per minute with a shallow breathing pattern represents the most immediate threat to life and requires urgent intervention.

Opioid medications exert their analgesic effects by binding to mu-opioid receptors in the central nervous system. These same receptors are densely located in the brainstem respiratory centers, particularly the pre-Bötzinger complex, which governs respiratory rhythm generation. When opioids bind to these receptors, they suppress the brainstem's responsiveness to rising carbon dioxide levels (hypercapnia) and blunt the hypoxic drive, leading to a slowed and shallow respiratory pattern [1]. This condition, known as opioid-induced respiratory depression (OIRD), is a potentially fatal complication that can occur even in patients who have developed tolerance to the analgesic and euphoric effects of opioids [1].

The insidious nature of OIRD is particularly dangerous. Research indicates that the onset and progression of respiratory depression can be subtle, delaying clinical detection until the patient progresses rapidly to cardiorespiratory collapse within minutes [1]. A respiratory rate falling to 8 breaths per minute signifies severe central nervous system depression. Without immediate intervention—such as withholding further opioid doses, providing supplemental oxygen, stimulating the patient, and preparing for the administration of an opioid antagonist like naloxone—this state can quickly deteriorate into respiratory arrest, hypoxic brain injury, and death.

The other assessment findings, while clinically significant, do not present the same level of immediate danger. Unrelieved pain (7/10) requires reassessment and possible adjustment of the analgesic regimen but does not pose an acute threat to airway or breathing. Mild constipation is a common and expected side effect of opioid therapy due to slowed gastrointestinal motility, manageable with bowel protocols, and is not immediately life-threatening. Drowsiness where the patient is easily arousable represents a mild level of sedation that warrants continued monitoring but does not yet indicate the profound respiratory center depression reflected by a critically low respiratory rate [1].References (research sources)

- [1]Insidious opioid-induced respiratory depression following abdominal steel pipe perforation injury: A case report.Case reportZhang X, Qiao S, Pan H. (2025) · DOI: 10.1097/md.0000000000045435

## 임상 시나리오

Clinical Scenario

A 35-year-old patient on chronic opioid therapy for low back pain presents with a respiratory rate of 8 breaths per minute and shallow breathing. This is a medical emergency indicating severe opioid-induced respiratory depression (OIRD).

Immediate Nursing Actions

- **Stimulate the patient:** Use a sternal rub or loud verbal commands to attempt arousal and encourage deeper breathing.

- **Administer naloxone:** Per facility protocol, dilute 0.4 mg in 10 mL normal saline and administer slow IV push every 2-3 minutes until respiratory status improves (target RR >10/min).

- **Support ventilation:** Prepare bag-valve-mask (BVM) ventilation with 100% oxygen if spontaneous breathing remains inadequate.

- **Activate emergency response:** Call the Rapid Response Team or Code Blue if the patient does not respond immediately to initial interventions.

Monitoring and Reassessment

- Continuously monitor respiratory rate, depth, SpO2, and end-tidal CO2 (EtCO2) if available; EtCO2 is the most sensitive indicator of hypoventilation.

- Assess level of consciousness using the Pasero Opioid-Induced Sedation Scale or Richmond Agitation-Sedation Scale (RASS).

- Be aware that naloxone's half-life (30-90 minutes) is often shorter than the opioid's; monitor for re-sedation and repeat doses as needed.

- Obtain an order for continuous pulse oximetry and capnography monitoring for the next 24 hours.

Differentiating from Other Findings

- **Pain 7/10:** Indicates inadequate analgesia; requires non-pharmacological interventions and provider notification for possible dose adjustment, but does not supersede airway/breathing emergencies.

- **Constipation:** An expected side effect managed with a bowel regimen (stool softeners, stimulants, hydration); intervention can be safely deferred until the patient is stable.

- **Drowsiness with arousal:** Common sedation that often precedes respiratory depression; requires close monitoring and holding the next dose, but a respiratory rate of 8 demands immediate reversal.

## 핵심 개념

- **Opioid-Induced Respiratory Depression (OIRD)** — A potentially fatal complication where opioids suppress the brainstem's response to CO2, leading to dangerously slow and shallow breathing.
- **ABC Priority Framework** — A nursing triage model prioritizing Airway, Breathing, and Circulation; respiratory rate of 8/min is a critical breathing issue requiring immediate intervention.
- **Mu-Opioid Receptors** — Receptors in the central nervous system that mediate pain relief but also cause side effects like respiratory depression when activated in the brainstem.
- **Naloxone** — An opioid antagonist used as an emergency antidote to reverse life-threatening respiratory depression from opioid overdose.
- **Tolerance** — A state where higher doses of opioids are needed to achieve the same analgesic effect; tolerance to respiratory depression develops slower than analgesic tolerance.

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