The osteoblasts and sinusoidal endothelial cells are closely associated with HSCs in the bone marrow,which are respectively referred to as osteoblastic niche and vascular niche.

Pathologic changes in trachea of rats exposed to artificial air pollution;

The possible mechanism of depressed antigenicity of cryopreserved trachea of rats;

Propofol target controlled infusion combined trachea topical anaesthesia for the removal of foreign body from trachobronchus in children;

Tracheal reconstruction by clavicular bone flap pedicled with sternoclei- domastoideus muscle;

Tracheal-carina reconstruction using main bronchus with operative side pulmonary lobe retained;

Objective: To investigate the effects of propofol on isolated tracheal smooth muscle of Guinea pigs and its mechanism.

Materials and methods: We analyzed the CT scans of 35 patient of endotracheal and endobronchial tuberculosois with emphasis on changes in the tube cavity and tube wall of trachea and bronchi.

The criterion for the trachea-bronchia and inferion pulmonary vein invaded were the tracheobronchial displacement or compressed in company with irregural tracheobronchial wall ,or the esophageal tumour extending into the trachea or main bronchus,t.

By the method of douche,trachea-bronchia epithelium was digested overnight and separated.