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Oxygen therapy for surgical patients

H B Fairley

    The American Review of Respiratory Disease
    |November 1, 1980
    PubMed
    Summary

    Postoperative hypoxemia, common after surgery, particularly in elderly or obese patients, can be managed with supplemental oxygen and nursing interventions. Regional analgesia improves pulmonary function more than narcotics.

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    Area of Science:

    • Anesthesiology
    • Pulmonary Medicine
    • Critical Care

    Background:

    • Increased alveolar-arterial Po2 difference and decreased functional residual capacity are common during and after surgery.
    • These changes lead to ventilation/perfusion maldistribution and intrapulmonary shunt, potentially without visible atelectasis on X-rays.

    Purpose of the Study:

    • To investigate the mechanisms and management of intraoperative and postoperative hypoxemia.
    • To identify patient risk factors and surgical procedures associated with prolonged hypoxemia.

    Main Methods:

    • The study reviews the physiological changes related to anesthesia and surgery affecting gas exchange.
    • It analyzes factors influencing the duration and severity of postoperative hypoxemia.

    Main Results:

    • Intraoperative hypoxemia is linked to general anesthesia and typically resolves quickly after peripheral surgery.
    • Postoperative hypoxemia is more severe in the elderly, obese, those with cardiopulmonary disease, and after upper abdominal/thoracic surgery, persisting for days.
    • Regional analgesia is superior to narcotics for maintaining postoperative pulmonary function.

    Conclusions:

    • Postoperative hypoxemia requires careful management, especially in high-risk patients.
    • Supplemental oxygen and active nursing care ('stir-up' regimen) are recommended for at-risk patients.
    • Regional analgesia should be considered to optimize postoperative pulmonary outcomes.

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