What does pulmonary function testing measure?

A percentage of predicted FEV1 (forced expiratory volume in one second) below 60% or a significantly reduced FVC (forced vital capacity) may constitute contraindications for surgery. Pulmonary function parameters are crucial for assessing surgical risk; when these key indicators fall below the aforementioned thresholds, it indicates impaired ventilation and gas exchange functions, potentially leading to risks such as respiratory failure and infection during anesthesia and postoperative recovery.

Even at the age of 70, poor lung function can still be improved through scientific regulation. If reduced lung function is caused by factors such as chronic inflammation or improper breathing habits, and there is no severe organic lung disease, lung function can be enhanced to some extent by standard treatment to control underlying conditions and consistent breathing exercises. This approach strengthens respiratory muscles, improves ventilation efficiency, and helps alleviate symptoms such as shortness of breath and fatigue.

In general, whether practicing deep breathing daily can enhance lung function depends on the individual's physical condition and the method of practice. When performing deep breathing exercises, choose an environment with fresh air and avoid polluted or enclosed spaces. Each session should not be too long, and should be discontinued before fatigue sets in. Individuals with underlying lung diseases should consult a physician before beginning such exercises.

Whether shortness of breath requires pulmonary function testing depends on the specific circumstances. If it is caused by transient, physiological factors, pulmonary function testing is usually unnecessary. However, if it results from persistent, pathological factors, pulmonary function testing is recommended. To reduce the occurrence of shortness of breath, it is important to maintain good indoor air circulation and avoid prolonged exposure to polluted or enclosed environments in daily life.

Poor lung function can be improved through various approaches: maintaining a balanced diet and consuming more foods that nourish the lungs; choosing aerobic exercises such as jogging and swimming; ensuring proper ventilation, avoiding smoking, and staying warm in daily life; practicing relaxation techniques like meditation to manage emotions; and, under medical guidance, using traditional Chinese herbs such as Astragalus (Huang Qi) and Fritillaria (Chuan Bei Mu). Maintaining regular作息 (作息 should be translated as "作息" is commonly used in Chinese to refer to daily routines or作息 habits which can be translated as "daily routines" or "作息" can be transliterated as "zuoxi" if needed for specific context, but here it's better to use natural English equivalent)作息 habits, and undergoing regular check-ups are essential for effectively improving lung function.

Pulmonary fibrosis affects lung function by restricting lung expansion, impairing oxygen diffusion capacity, disrupting the ventilation-perfusion ratio, reducing respiratory muscle efficiency, and increasing the risk of airway obstruction. Its pathophysiological mechanisms are closely related to parenchymal remodeling caused by collagen deposition. Pulmonary fibrosis causes the lung tissue to progressively lose elasticity, forming a "honeycomb lung" structure, leading to restrictive ventilatory dysfunction.

Abdominal breathing is a deep breathing technique that increases lung ventilation by fully engaging the movement of the diaphragm. To practice, relax the body and assume a comfortable seated or supine position. Place one hand on the abdomen and the other on the chest. Inhale slowly through the nose, allowing the abdomen to rise and feeling it expand; then exhale slowly through the mouth, contracting the abdomen.

Mechanical sputum removal improves lung function by promoting sputum expulsion, enhancing airway clearance, dilating airways, increasing respiratory rate, and improving pulmonary blood circulation through vibrations generated by a mechanical device. If you have any concerns or special medical conditions, it is recommended to consult professional healthcare providers. Additionally, maintaining healthy lifestyle habits and a positive mindset is also important.