Rabbit model of radiation-induced lung injury

OBJECTIVE@#To explore the feasibility of establishing an animal model of chronic radiation-induced lung injury.@*METHODS@#Twenty-eight New Zealand white rabbits were randomly divided into 3 groups (the right lung irradiation group, the whole lung irradiation group and the control group). Animal model of radiation-induced lung injury was established by high-does radiotherapy in the irradiation groups, then all rabbits underwent CT and pathological examinations at 1, 2, 4, 8, 12, 16 weeks, respectively after radiation.@*RESULTS@#Within 4 weeks of irradiation, some rabbits in the right lung irradiation group and whole lung irradiation group died. CT and pathological examinations all showed acute radiation pneumonitis. At 8-12 weeks after irradiation, CT scanning showed ground glass samples signs, patchy shadows and fibrotic stripes. Pathological examination showed the fibrosis pulmonary alveolar wall thickened obviously.@*CONCLUSIONS@#The clinical animal model of chronic radiation-induced lung injury which corresponds to practical conditions in clinic can be successfully established.

Surgical treatment of primary malignant tumors of the trachea and main bronchus / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To explore the clinical experience of surgical treatment of primary malignant tumors of the trachea and main bronchus.</p><p><b>METHODS</b>The clinicopathological data of 18 patients with primary malignant tumors of the trachea and main bronchus surgically treated from February 1994 to August 2007 were reviewed retrospectively. The surgical management included sleeve tracheal resection in 8 cases, lower trachea and carina resection with carina reconstruction in 4 cases, local enucleation of the tumor in 4 cases, left or right carino-pneumonectomy and carina reconstruction in 2 cases, and resection of the tracheal or bronchial tumor and reconstruction of the airway under cardiopulmonary bypass in 6 cases.</p><p><b>RESULTS</b>Among the 18 cases, there were 7 adenoid cystic carcinomas, 9 squamous cell carcinomas, 1 lymphoepithelial-like carcinoma and 1 follicular non-Hodgkin lymphoma. All the cases recovered well except one who died of endotracheal bleeding and asphyxia at the 10(th) postoperative day.</p><p><b>CONCLUSION</b>Surgical resection is the most effective treatment for primary malignant tumors of the trachea and main bronchus. The selection of operation modes should be individualized according to patients' condition. Both complete resection and safety should be taken into consideration simultaneously.</p>

Perioperative management for primary tracheal malignant tumors resected under cardiopulmonary bypass / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To retrospectively review the perioperative management for primary tracheal malignant tumors resected under cardiopulmonary bypass.</p><p><b>METHODS</b>The data of 6 patients with primary tracheal malignant tumors who underwent surgery under cardiopulmonary bypass from December 1999 to August 2003 were reviewed. Cardiopulmonary bypass was established through right femoral vessels in 2 patients for emergency operation, through right atrium and ascending aorta in 4 patients. Sleeve tracheal resections in 3 patients, carinal resections and carina reconstructions in 2, and local enucleation in 1 were performed. Respiratory airway was kept patent by coughing and expectorating sputum.</p><p><b>RESULTS</b>All patients' dyspnea were relieved remarkably. The postoperative mechanic ventilation assistance lasted from 10 hours to 7 days. There was no perioperative mortality.</p><p><b>CONCLUSION</b>Resection of primary tracheal malignant tumors with severe tracheal obstruction under cardiopulmonary bypass is practicable. Keeping respiratory airway patent perioperatively is very important and helpful to postoperative recovery.</p>