Management of Postoperative Dyspnea

Immediate Assessment and Monitoring

The American Society of Anesthesiologists recommends monitoring vital signs, including level of consciousness, respiratory rate, heart rate, blood pressure, peripheral oxygen saturation, temperature, and pain score, in patients experiencing dyspnea after surgery 1, 2, 3
The World Journal of Emergency Surgery suggests observing for respiratory distress indicators, such as use of accessory muscles, nasal flaring, tachypnea, tachycardia, paradoxical breathing, and fearful facial expression, in patients with postoperative dyspnea 4, 5, 6
Pulse oximetry alone is insufficient for monitoring respiratory status, as it can give incorrect readings and does not monitor ventilation 1, 2, 3

Pulmonary embolism is a main cause of morbidity and mortality after abdominal surgery, with risk factors including obesity, increased age, smoking, varicose veins, heart or respiratory failure, OSA, thrombophilia, and estrogen contraception 7
Atelectasis and pneumonia are common postoperative pulmonary complications requiring evaluation 7

The British Journal of Anaesthesia recommends administering supplemental oxygen when room air SpO2 decreases below 94% 8
Positioning the patient upright in a semi-seated or sitting position can help prevent further atelectasis development and improve oxygenation 1, 5, 6, 7
Non-invasive positive pressure ventilation (CPAP or high-flow nasal cannula) can be considered for hypoxemia (SpO2 <90%) in the absence of contraindications like intestinal occlusion and vomiting 5, 6, 7
The World Journal of Emergency Surgery suggests that thromboprophylaxis with unfractionated heparin or LMWH can be used if PE is suspected or confirmed 7
Opioids are first-line treatment for dyspnea, with sufficient evidence for palliation 4, 5, 6, 9

Morphine can be used for therapy of dyspnea associated with acute left ventricular and pulmonary edema, although the specific citation for this is not provided, opioids in general reduce the unpleasantness of dyspnea without causing relevant respiratory depression or impaired oxygenation when used appropriately 9
Sedation with benzodiazepines or propofol can be used as second-line treatment if dyspnea is not resolved with adequate opioid doses, particularly when anxiety contributes 4, 5, 6
Non-pharmacological interventions, such as cooling the face, opening windows, using small ventilators, adequate positioning, respiratory training, and a calm atmosphere, can also be used to manage dyspnea 9

Trained staff availability, with one recovery nurse per patient minimum, and an appropriately skilled physician immediately available, are essential for ongoing monitoring and escalation 2, 3
Capnography can be used for early detection of airway obstruction 1, 2, 3
Transfer to a higher level of care (ICU/HDU) should be considered if the patient's condition deteriorates or fails to improve 1, 2, 3