Postoperative Pain Management in a Patient with Substance Use Disorder
Ms. K is a 32-year-old female who is 24 hours postoperative after an appendectomy. She has a history of opioid use disorder and is currently on methadone maintenance therapy (30 mg daily). She reports severe incisional pain rated 8/10 and is requesting more pain medication. She is also anxious and irritable. Her vital signs are: BP 138/88 mmHg, HR 98 bpm, RR 20 breaths/min, Temp 37.8°C, SpO2 98% on room air. She is receiving acetaminophen 650 mg PO every 6 hours as needed and ibuprofen 400 mg PO every 6 hours as needed. She has an order for oxycodone 5 mg PO every 4 hours as needed for breakthrough pain. The nurse notes that she has been requesting oxycodone every 2 hours, which is more frequent than prescribed. She is also due for her methadone dose.
1. What are the key considerations for managing Ms. K's pain while addressing her substance use disorder?
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Key considerations include: 1) Assess pain thoroughly using a validated scale, recognizing that her reported pain is real and should be treated. 2) Avoid stigmatizing language and ensure compassionate care. 3) Administer methadone as prescribed to prevent withdrawal and maintain baseline tolerance. 4) Use multimodal analgesia: scheduled acetaminophen and ibuprofen around the clock, not just as needed, to provide consistent pain relief. 5) Administer oxycodone as prescribed for breakthrough pain, but do not exceed the ordered frequency; if pain is not controlled, collaborate with the provider for adjustment. 6) Monitor for signs of over-sedation or respiratory depression (RR, sedation level). 7) Consider consulting addiction medicine or pain specialist for complex pain management. 8) Educate on non-pharmacological methods (positioning, relaxation, ice). 9) Ensure a supportive environment and involve her in care decisions. Rationale: Patients with substance use disorder often have increased pain sensitivity and may require higher doses, but safe prescribing and monitoring are essential.
2. The nurse enters the room and finds Ms. K drowsy but arousable, with a respiratory rate of 10 breaths/min and oxygen saturation of 90% on room air. What should the nurse do?
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The nurse should: 1) Immediately assess level of consciousness and respiratory status. 2) Stimulate the patient and encourage deep breathing. 3) Administer oxygen to maintain SpO2 ≥ 92%. 4) Notify the provider immediately because this indicates possible opioid-induced respiratory depression. 5) Prepare to administer naloxone if respiratory depression is severe (RR < 8 or unresponsive), but use cautiously in opioid-tolerant patients to avoid precipitating withdrawal. 6) Reassess vital signs frequently. 7) Review medication administration to determine if she received more oxycodone than prescribed or if other sedatives were given. 8) Document the event and interventions. Rationale: Early recognition and intervention prevent respiratory arrest; naloxone should be used judiciously in opioid-tolerant patients.