Postoperative Day 1 After Hip Fracture Repair: Analgesia or Oversedation?
Mrs. R is a 79-year-old woman, 52 kg, on postoperative day 1 after ORIF of a right hip fracture. She has mild cognitive impairment and lives with her daughter. Analgesia is morphine by PCA: 1 mg demand dose, 6-minute lockout, no basal rate. In the past hour the PCA log shows 9 demands and 7 doses delivered. At 0700: BP 104/58 (admission baseline 138/76), HR 92, RR 10, SpO2 91% on 2 L/min nasal cannula, temp 37.8 °C. She is drowsy but rouses to voice and drifts off mid-sentence; her Pasero Opioid-Induced Sedation Scale score is 3. She rates pain 3/10 at rest and 7/10 when physical therapy moves her leg. The daughter is at the bedside pressing the button for her mother and asks why "they won't just give her more medicine."
1. Which assessment findings concern you most, and what are your actions in the next 10 minutes?
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Priority problem is impending opioid-induced respiratory depression, not uncontrolled pain.
- Why: Sedation changes before respiratory rate falls. POSS 3 (frequently drowsy, drifts off during conversation, but arousable) with RR 10, SpO2 91% on supplemental oxygen, and a BP well below her baseline is a deteriorating pattern, not a comfort pattern. Her rest pain is only 3/10, so more opioid buys sedation without meaningful benefit.
- Do first: Stop the PCA (hold further doses), stimulate her, reposition, coach deep breaths/incentive spirometer, apply/confirm oxygen, recheck full vitals and SpO2, and stay to reassess every 15–30 minutes.
- Escalate: Notify the surgeon and rapid response/anesthesia per protocol using SBAR with the trend, not just the single number. Request a multimodal plan: scheduled acetaminophen, ice, positioning, and premedication 30–45 minutes before therapy instead of escalating the PCA.
- Naloxone is not the first move: Reserve it for RR <8, unresponsiveness, or inability to maintain an airway. Giving it for POSS 3/RR 10 risks abrupt, severe pain and catecholamine surge.
- Document the sedation score, interventions, notification, and response.
2. The daughter is pressing the PCA button and wants more opioid. How do you respond?
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Acknowledge her intent ("You're trying to keep her comfortable, and that matters") and then reframe the risk in plain language: the medicine is already making her too sleepy and her breathing is slowing, so more right now could be dangerous.
- PCA by proxy is not safe: Only the patient should press. Family dosing removes the patient's own sedation feedback loop and is a recognized cause of oversedation. Explain this as a safety rule, not a criticism.
- Separate rest pain from movement pain: 3/10 at rest is acceptable; the 7/10 is provoked by therapy. The plan is to dose ahead of therapy and add non-opioid measures, not to increase the background opioid.
- Give her a job: Ask her to watch for sleepiness, slow breathing, or trouble rousing and to call you immediately - this converts a conflict into monitoring partnership.
- Close the loop: Tell her what you have already done and when you will return, and confirm she can repeat the plan back.
3. What else could explain her new drowsiness and low oxygen saturation, and what would prompt you to escalate immediately?
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Do not anchor on the opioid alone - postoperative older adults usually have more than one driver.
- Hypoxemia/atelectasis: Listen to lung bases, check effort and secretion clearance; splinting from hip pain promotes collapse.
- Bleeding/hypovolemia: Relative hypotension plus tachycardia warrants checking the dressing, drains, and hemoglobin; occult blood loss causes both sedation and hypotension.
- Infection/delirium: Temp 37.8 °C, new drowsiness, and mild cognitive impairment make pneumonia, urinary tract infection, and delirium plausible. Screen with a formal tool and obtain urine/chest evaluation as ordered.
- Retention and constipation: Bladder scan and last bowel movement - both are common, reversible delirium contributors after hip surgery.
- Metabolic: Point-of-care glucose; review sodium and renal function.
Escalate immediately if RR falls below 8–10 and does not respond to stimulation, SpO2 cannot be maintained on the ordered oxygen, she becomes unarousable, systolic BP drops further, or urine output falls - activate rapid response rather than continuing to watch.