{
  "abstract": "Introduction Subglottic-tracheal (STS) stenosis can be of malignant or benign aetiology. In its diagnosis, among other clinical, radiological and endoscopic data, the FEV1/FEP index has been described as having a high diagnostic specificity when it has a value > 10 L/min/ml.Aim To analyse the general, endoscopic and in particular spirometric characteristics of our patients with STS.Methods Retrospective descriptive study of patients with STS referred for interventional bronchoscopic treatment (from 2017 to 2024). General data, aetiology, lung function test with calculation of the FEV1/FEP index and therapeutic endoscopic manoeuvres were collected.Results The sample consisted of 30 patients (79.3% female), mean age 62±13 years. The most frequent cause was idiopathic (41.4%) followed by stenosis secondary to tracheostomy (20.7%) and endothoracic goitre (10.3%). The remaining cases were: compression due to mediastinal masses, stenosis due to granulomatosis with polyangiitis or radiotherapy. Regarding endoscopic diagnosis, 85.7% of STS corresponded to grade 2 according to Cotton’s classification, the rest being grade 1. Endoscopic treatment was performed in 25 patients, the most frequent (24.1%): cutting with an electric blade, balloon dilatation and instillation of intralesional corticosteroid. 44% of patients treated were referred to thoracic surgery. 55% of the patients had lung function test prior to endoscopic treatment. Of these, 25% had a normal volume flow curve, 12.5% had expiratory flattening and 62.5% had both inspiratory and expiratory flattening. FEV1/FVC index according to the morphology of the volume flow curve: 68.8% had an FEV1/EFP index >10L/min/ml.Abstract P258 Table 1Spirometric values of those patients with lung function tests and mean FEV1/PEF index according to flow-volume curve morphologyConclusions Spirometry and its volume flow curve are useful for the diagnosis and follow-up of tracheal pathology, with the FEV1/EFP index standing out.",
  "authors": [
    {
      "affiliations": [
        "Pneumology Service, Hospital La Axarquía, Vélez-Málaga, Spain"
      ],
      "name": "EJ Soto Hurtado"
    },
    {
      "affiliations": [
        "Pneumology Service, Hospital Regional Universitario, Málaga, Spain"
      ],
      "name": "E Salcedo Lobera"
    },
    {
      "affiliations": [
        "Pneumology Service, Hospital Regional Universitario, Málaga, Spain"
      ],
      "name": "M García García"
    },
    {
      "affiliations": [
        "Distrito Sanitario Málaga-Guadalhorce, Centro de Salud Palma-Palmilla, Málaga, Spain"
      ],
      "name": "Y Rodríguez Gallego"
    }
  ],
  "title": "P258 Evaluation of patients with subglotic-tracheal stenosis and utility of pulmonary function tests",
  "uid": "be997207-7526-5c49-b3b3-4984549c499a"
}