Perioperative anesthetic management of patients with chronic respiratory disease

Anesthesiology · Pulmonology

Chronic respiratory diseases (CRDs), including chronic obstructive pulmonary disease (COPD), asthma, interstitial lung disease (ILD), and bronchiectasis, are major contributors to global morbidity and pose significant challenges during anaesthesia and surgery. These conditions are often associated with reduced pulmonary reserve, impaired gas exchange, airway hyperreactivity, and increased susceptibility to respiratory infections, increasing the risk of perioperative and postoperative pulmonary complications. Patients with compromised baseline lung function, particularly those with COPD, are at greater risk of respiratory deterioration following surgery. Therefore, perioperative anaesthetic management requires comprehensive preoperative respiratory assessment, optimisation of underlying disease, careful selection of anaesthetic techniques, and appropriate intraoperative ventilation strategies. Vigilant postoperative monitoring and respiratory support are equally important to minimise complications, preserve pulmonary function, and facilitate safe recovery.[1]Preoperative assessment and optimizationA detailed respiratory history should assess baseline symptoms, exercise tolerance, smoking status, exacerbations, previous hospitalizations, and current medication usePhysical examination should evaluate respiratory rate, oxygen saturation, breath sounds, and signs of respiratory distress or respiratory failurePulmonary function tests may be useful in selected patients when the results are expected to influence perioperative management, particularly in those with unexplained symptoms or significant respiratory impairmentChest imaging and arterial blood gas analysis should be performed when clinically indicated rather than routinely in every patientExisting inhaled bronchodilators, corticosteroids, and other prescribed respiratory medications should generally be continued throughout the perioperative periodElective surgery should be reconsidered or postponed when patients have an acute respiratory infection or uncontrolled exacerbation until their clinical condition is optimizedSelection of anesthetic techniqueRegional anesthesia may be preferred when appropriate because it can reduce airway instrumentation and avoid some respiratory effects associated with general anesthesiaGeneral anesthesia may be necessary for procedures requiring airway control or when regional techniques are contraindicated or inadequateShort-acting anesthetic agents and appropriate neuromuscular monitoring can facilitate controlled emergence and reduce residual drug effectsThe anesthetic plan should account for baseline pulmonary function, surgical requirements, aspiration risk, and the possibility of postoperative ventilatory supportIntraoperative respiratory managementAdequate preoxygenation and careful airway management are important in patients with limited respiratory reserveLung-protective ventilation using appropriate tidal volumes based on predicted body weight helps minimize ventilator-associated lung injuryIn patients with COPD, sufficient expiratory time should be allowed to reduce air trapping and intrinsic positive end-expiratory pressureIn patients with asthma, adequate anesthetic depth and continuation of bronchodilator therapy help reduce the risk of perioperative bronchospasmIn patients with ILD, unnecessary high inspired oxygen concentrations and excessive airway pressures should be avoided while maintaining adequate oxygenationCareful fluid management is important, particularly in patients with impaired pulmonary function or associated cardiac diseasePostoperative management and respiratory carePatients should be monitored for hypoxemia, bronchospasm, respiratory fatigue, and delayed recovery from anesthesiaAdequate pain control is essential to facilitate deep breathing, coughing, and early mobilization while minimizing opioid-related respiratory depressionSupplemental oxygen should be administered according to individual requirements, with particular attention to patients at risk of hypercapnic respiratory failureIncentive spirometry, effective airway clearance, chest physiotherapy, and early mobilization may help reduce postoperative pulmonary complicationsNoninvasive ventilation may be considered in selected patients with postoperative respiratory failure or significant ventilatory impairmentDisease-specific perioperative considerationsRespiratory conditionImportant anesthetic considerationCOPDMinimize dynamic hyperinflation and allow adequate expiratory time during mechanical ventilation.AsthmaOptimize airway control and minimize triggers of bronchospasm.Interstitial lung diseaseReduce avoidable ventilator-associated lung injury and monitor for postoperative respiratory deterioration.BronchiectasisOptimize secretion clearance and assess for active respiratory infection before elective surgery.Obstructive sleep apneaAssess postoperative airway obstruction risk and consider appropriate positive airway pressure support.ConclusionPerioperative anaesthetic management of patients with chronic respiratory diseases requires an individualised approach based on disease severity, baseline pulmonary function, and surgical requirements. Preoperative optimisation of respiratory status, appropriate selection of anaesthetic techniques, lung-protective ventilation, and effective postoperative respiratory care are essential to minimise pulmonary complications. Vigilant monitoring and timely intervention are particularly important in patients with compromised respiratory function to ensure perioperative safety, facilitate recovery, and improve clinical outcomes.[2]Reference(s):1. Shukla SD, Swaroop Vanka K, Chavelier A, et al. Chronic respiratory diseases: An introduction and need for novel drug delivery approaches. Targeting Chronic Inflammatory Lung Diseases Using Advanced Drug Delivery Systems. 2020;1-31. doi:10.1016/B978-0-12-820658-4.00001-7. https://pmc.ncbi.nlm.nih.gov/articles/PMC7499075/2. Labaki WW, Han MK. Chronic respiratory diseases: a global view. Lancet Respir Med. 2020;8(6):531-533. doi:10.1016/S2213-2600(20)30157-0. https://pmc.ncbi.nlm.nih.gov/articles/PMC8034823/