Annales françaises d'anesthèsie et de rèanimation
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After surgery, hypoxemia and/or acute respiratory failure (ARF) mainly develop following abdominal and/or thoracic surgery. Anesthesia, postoperative pain and surgery will induce respiratory modifications: hypoxemia, pulmonary volumes decrease and atelectasis associated to a restrictif syndrome and a diaphragm dysfunction. Maintenance of adequate oxygenation in the postoperative period is of major importance, especially when pulmonary complications such as ARF occur. ⋯ Rationale for postoperative NIV use is the same as the post-extubation NIV use plus the specificities due to the respiratory modifications induced by the surgery and anesthesia. Postoperative NIV improves gas exchange, decreases work of breathing and reduces atelectasis. The aims of this article are (1) to review the main respiratory modifications induced by surgery and anesthesia which justify postoperative NIV use (2) to offer some recommendations to apply safely postoperative NIV and (3) to present the main results obtained with preventive and curative NIV in a surgical context.
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One of the key challenges in perioperative care is to reduce postoperative morbidity and mortality. Patients who develop postoperative morbidity but survive to leave hospital have often reduced functional independence and long-term survival. Mechanical ventilation provides a specific example that may help us to shift thinking from treatment to prevention of postoperative complications. ⋯ Stimulated by previous findings in patients with acute respiratory distress syndrome, the use of lower tidal volume ventilation is becoming increasingly more common in the operating room. However, lowering tidal volume, though important, is only part of the overall multifaceted approach of lung protective mechanical ventilation. In this review, we aimed at providing the most recent and relevant clinical evidence regarding the use of mechanical ventilation in patients undergoing abdominal surgery.
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Ann Fr Anesth Reanim · Jul 2014
ReviewIntraoperative management of heart-lung interactions: "From hypothetical prediction to improved titration"
Extensive literature describes the suitability of dynamic parameters to predict responsiveness in fluid. However, based on heart-lung interactions, these parameters can have serious limitations, including the use of protective lung ventilation. ⋯ In this context, the attending physician could, alternatively, titrate the need of fluids with a small fluid challenge, which remains unaffected by low tidal volume, the presence of arrhythmia, or the presence of spontaneous ventilation. When intraoperative prediction of fluid responsiveness is required in mechanically ventilated patients, "improved" titration should be preferred to a hypothetical prediction.
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Ann Fr Anesth Reanim · Jul 2014
ReviewInfluence of pain on postoperative ventilatory disturbances. Management and expected benefits.
Abdominal surgery induces postoperative ventilatory dysfunction related to a combination of reflex diaphragmatic inhibition, respiratory muscle injury and pain. The role of pain is difficult to isolate from other components. Thoracic epidural analgesia using local anesthetics is able to partially reverse the diaphragmatic dysfunction. ⋯ Regardless of the mechanisms, epidural analgesia has been shown to improve the postoperative ventilation and to prevent the occurrence of pulmonary complications. Pain relief, either by parenteral administration of opiate, and/or parietal blockade has been shown to improve the diaphragm motion and the overall respiratory status. All analgesic strategies may facilitate the implementation of postoperative physiotherapy which has a significant interest in preventing postoperative pulmonary complications.