ABSTRACT
BACKGROUND:Airway epithelial regeneration can effectively inhibit submucosal hyperblastosis and the occurrence of obliteration. Studies demonstrated that ventilation could accelerate the regeneration of airway epithelium. OBJECTIVE:To establish and improve an orthotopic tracheal transplantation model and to further observe the effects of ventilation on trachea in alogeneic mice. METHODS:C57BL/6 mouse's tracheal served as donor, and BALB/c mouse's tracheal as recipient. This experiment contained two groups. In the experimental group, the membranous part of trachea was longitudinaly dissected in two donors and sutured into an enlarged trachea, which was implanted in the recipient. In the control group, donor's trachea was implanted into the recipient in situ. Samples were obtained and detected at 28 days after surgery. RESULTS AND CONCLUSION: Hematoxylin-eosin staining results demonstrated that compared with the control group, wel-differentiated ciliated epithelium was visible in the epithelial lamina of tracheal lumen, accompanying a few non-ciliated single or stratified squamous epithelium, mild submucosal fibrosis and inflammatory cel infiltration. Morphological analysis revealed that ciliated epithelial proportion in the experimental group was higher than in the control group (P < 0.05). The ratio of lamina propria to the tracheal cartilage, submucous fibrous tissuearea and the degree of lymphocyte infiltration were lower in the experimental group than in the control group (P < 0.05). Immunohistochemical staining demonstrated that the transplanted tracheal epithelium in both groups was recipient epithelial phenotype. Results verified that a modified orthotopic tracheal transplantation model was successfuly established. The increased ventilation of the tracheal alografts can accelerate the differentiation of tracheal epithelium. The wel-differentiated airway epithelium inhibited the proliferation of fibroblast.
ABSTRACT
<p><b>OBJECTIVE</b>To study the experiences and operative procedure choice for surgical management of chronic tuberculous empyema.</p><p><b>METHODS</b>Totally 461 patients of chronic tuberculous empyema were treated surgically in Shandong Provincial Chest Hospital between January 2006 and December 2011. There were 317 male and 144 female patients, aging from 6 to 79 years with a mean age of 32 years. Preoperative duration lasted from 3 months to 50 years, including 347 cases within 1 year, 61 cases 1 to 2 years, and 53 cases above 2 years. Chest tube drainage or pleuracentesis was performed in 395 patients, decortication in 287 patients, thoracoplasty in 13 patients, pleuropneumonectomy and resection of remaining lung in 11 patients, complex operation in 150 patients.</p><p><b>RESULTS</b>There was no death perioperatively. Four hundred and forty-five patients were cured at once, 6 patients were cured by stages. One patient with empyema and bronchial fistula relapsed bronchial fistula after pulmonary lobectomy and pleural decortication, whom was cured by the combination operation which including fistula repair, muscle flap tamponing and local thoracoplasty according to the closed drainage of thoracic cavity after 6 months. Three cases were suffered incision delayed healing and were cured by dressing change. Five cases were suffered abscess of chest wall within 3 months and were cured by local thoracoplasty. One patient died due to respiratory failure in one year which resulted in tuberculosis spreading because of bronchial fistula after pleuropneumonectomy.</p><p><b>CONCLUSIONS</b>Surgical management of chronic tuberculous empyema still have irreplaceable roles. Selecting appropriate operations according to different cases will achieve good results.</p>