Bronchial breath sounds

When the lung tissue between the central airways and the chest wall is airless as a result of consolidation, atelectasis or fibrosis the breath sounds are transmitted to the stethoscope with relatively little loss by attenuation or filtration. They resemble the sounds heard over the trachea in that they are loud, with the higher frequencies preserved and are audible throughout expiration as well as inspiration. In all these respects bronchial breathing differs from the normally transmitted breath sounds, which are faint, low pitched and inaudible during the latter half of expiration. Bronchial breathing is often heard over an airless upper lobe, whether the lobar bronchus is patent or obstructed, because the mediastinal surface of the upper lobes is in contact with the trachea and the sound is directly transmitted to solid lung. There is no direct path of transmission to the lower lobes so that the tracheal sounds do not reach them unless the intervening bronchi are patent. Bronchial breathing is usually absent, therefore, when the lower lobe is consolidated or atelectatic as a result of bronchial obstruction.

Reference- Paul forgax

Lady Windermere Syndrome

Middle lobe syndrome

Right middle lobe syndrome is a pulmonary condition characterized by the chronic or recurrent collapse (atelectasis) and inflammation of the right middle lobe of the lung, often accompanied by bronchiectasis. It occurs due to anatomical vulnerabilities and can be caused by obstructive or non-obstructive factors. 

* Anatomy: The right middle lobe bronchus is relatively long, narrow, and surrounded by a ring of lymph nodes, making it highly susceptible to blockage or poor collateral ventilation. [

* Causes:

* Obstructive: External compression from enlarged lymph nodes (due to infections like tuberculosis or histoplasmosis), tumors, or internal blockages like foreign bodies and mucus plugs.

   * Non-obstructive: Persistent inflammation, chronic bronchitis, or atypical bacterial infections (such as Mycobacterium avium complex).

* Symptoms: Patients may experience a chronic "wet" cough, recurrent pneumonia, hemoptysis (coughing up blood), chest pain, and shortness of breath. 

* Diagnosis: Diagnosed using chest X-rays (revealing a classic triangular, wedge-shaped opacity) and high-resolution CT scans. Bronchoscopy is often performed to rule out tumors or obstructions. 

* Treatment: Management generally involves airway clearance techniques, antibiotics for infection, and bronchodilators. In severe, recurrent, or obstructive cases, surgical removal of the lobe (lobectomy) may be required.