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Hypercapnic coma at the postanesthesia care unit: A case report.

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A patient experienced respiratory depression and hypercapnia after surgery despite normal oxygen saturation. Prompt mechanical ventilation led to full recovery, highlighting the need for vigilant monitoring post-anesthesia.

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Area of Science:

  • Anesthesiology
  • Critical Care Medicine
  • Oncology

Background:

  • A 59-year-old female patient with rectal cancer and metastasis presented with severe abdominal pain requiring continuous intravenous morphine.
  • The patient underwent explorative laparotomy under general anesthesia for mechanical ileus.

Purpose of the Study:

  • To report a case of delayed respiratory depression and hypercapnia following general anesthesia in a patient with advanced cancer.
  • To emphasize the importance of recognizing and managing severe acidosis and hypercapnia in the postanesthesia care unit.

Main Methods:

  • The patient received general anesthesia for explorative laparotomy.
  • Post-extubation, the patient was monitored in the postanesthesia care unit and received oxygen via facial mask.
  • Emergent intubation and arterial blood gas sampling were performed due to unresponsiveness.

Main Results:

  • Despite a pulse oximeter reading of 98-99%, the patient exhibited unresponsiveness and sluggish reflexes.
  • Arterial blood gas analysis revealed severe acidosis with hypercapnia.
  • Following mechanical ventilation in the intensive care unit, the patient regained consciousness and fully recovered.

Conclusions:

  • Postoperative respiratory depression and hypercapnia can occur even with seemingly adequate oxygenation.
  • Vigilant monitoring and prompt intervention, including mechanical ventilation, are crucial for managing severe respiratory compromise in the postanesthesia period.
  • This case underscores the potential for opioid-induced respiratory depression in patients with advanced cancer receiving high-dose analgesics.