Clinical efficacy of heat-sensitive moxibustion combined with wenfei huaxian recipe in the treatment of fibrotic interstitial lung disease - A large sample, multicentre, randomised controlled trial

INTERVENTION: Experimental group:heat‐sensitive moxibustion combined with wenfei huaxian recipe;Control group:Pirfenidone Capsules; CONDITION: Interstitial lung disease with pulmonary fibrosis PRIMARY OUTCOME: FVC% change from baseline; SECONDARY OUTCOME: Chinese Medicine Symptom Score;Respiratory distress score;St George's Breathing Questionnaire score;6 minutes walking distance;forced expiratory volume in one second;total lung capacity;carbon monoxide diffusion;partial pressure of oxygen;partial pressure of carbon dioxide;oxygen saturation; INCLUSION CRITERIA: 1.Meeting the clinical diagnostic criteria for interstitial lung disease with interstitial fibrotic changes. 2.Acupoint thermal sensitivity within the two lateral lines of the dorsal foot and solar bladder meridian, in the area between the two horizontal lines of the lung and diaphragm points, or in the area between the first and second intercostal spaces of the anterior chest from the inside out to within 6 inches. 3.Age = 18 years, no restriction on gender. 4.patients can correctly express the sensation of moxibustion. 5.voluntarily sign the informed consent form.