Humans ; Reconstructive Surgical Procedures ; Trachea ; surgery

Objective To explore the electronystagmography (ENG) changes and their clinical significance in aged patients with vertebro-basilar insufficiency (VBI). Methods Sixty aged patients with VBI were selected as experimental group for testing of visuo-oculomotor system reaction, spontaneous nystagmus, caloric test and positional nystagmus. Forty normal aged persons as control group. Results In the experimental group, there were 11 cases (18.3%) who had spontaneous nystagmus and 46 cases (76.6%) with positional nystagmus. The positional nystagmus intension in those patients was 7.76?6.05?/s, which was much higher compared to the control group (P

Laryngeal conservation surgery trys for more laryngeal function reservation in precondition of radical cure,and presently has been the main method of treating larygeal carcinoma.The article discusses the moral principle that should be followed in the course of developing conservation laryngeal surgery on the point of view of medical ethics.To get curative effect,the surgeons should possess high responsibility and masterly skill,and highly regard multi-discipline cooperation and multimodality therapies.

Objective To investigate the killing effect and molecular mechanism of different doses of ~(125)I seed interstitial brachytherapy for human hepatoma HepG2 cells in nude mice transplanted tumor.Methods Twenty nude mice bearing human hepatoma HepG2 cells were randomly divided into 4 groups (each n=5) and given ~(125)I seed interstitial brachytherapy at different doses including 18.5 MBq ~(125)I,29.6 MBq ~(125)I,37.0 MBq ~(125)I and 0 (the control group) ,respectively.~(125)I seeds were percutaneously implanted into tumors,each mouse with 1 ~(125)I seed implanted.Twenty-eight days later,nude mice were sacrificed and routine pathological examination was performed,.The expression of Bcl-2 and Bax was detected with immunohistochemical methods.Results Pathological examination showed serious coagulation necrosis of tumor cells surrounded by extensive fibrosis in all treatment groups,whereas rich tumor cells with proliferative growth were observqed in the control group.Immunohistochemical analysis showed that the expression of Bax in all treatment group were higher than that in the control group.the expression of which was up-regulated with increasing doses of ~(125)I seed.The expression of Bcl-2 and the ratio of Bcl-2/Bax in all treatment groups were lower than those in the control group.the expression of which was down-regulated with increasing doses of ~(125)I seed.The expression of Bcl-2.Bax and the ratio of Bcl-2/Bax among treatment groups and control group had statistical difference (P＜9.05) ,so as the difference among treatment groups (P＜0.05) .Conclusion ~(125)I seed interstitial brachytherapy induces apoptosis in human hepatoma HepG2 cells by reducing the ratio of Bcl-2/Bax and thereby inhibits the growth of tumor in nude mice,and the extent positively correlates with dosage in a certain range.

Radical pancreaticoduodenectomy is the only effective method for the treatment of malignancies in the pancreatic head and the periampulary region.Early determination of the involvement of the superior mesenteric artery (SMA)is important for the selection of the surgical procedure and judgment of the prognosis.The operation should follow the principle of tumor-free and adequate resection range,safe resection margin and complete lymph node resection.For this purpose,we performed the radical pancreaticoduodenectomy via mesenteric approach.The SMA was dissected first,and then the tumor was en-bloc resected.From December 2011 to December 2012,24 patients with tumors in the pancreatic head or the periampullary region received radical pancreaticoduodenectomy via the mesenteric approach at the Second Affiliated Hospital of Harbin Medical University,and the short-term outcome was satisfactory.

Objective To optimize human acellular dermal matrix(ADM) and evaluate its biological characters. Methods Human skin was treated with hypertonic saline followed by NaOH maceration(group A), hypertonic saline followed by sodium dodecyl sulfate (SDS) detergent(group B) or Dispase Ⅱ followed by Triton X-100(group C), the resulting ADM were sectioned, and then were stained by special immunohistochemistry method. The cytotoxicity of them were evaluated by methyl thiazolyl tetrazolium (MTT) colorimetry and then cell compatibility was analyzed by cell culture;The optimized ADM resulted was choosen for use. Fibrablasts(FBs)were transfected with adenovirus vector encoding green fluorescent protein gene(Ad-GFP)and the growth of them on the optimized ADM was observed by fluorescent microscopy. Results Collagen and elastic fibers can still be observed in three kinds of ADM. The cells in dermis can be disintegrated both in group A and C, but not in group B. The cytotoxicity scores of the ADM prepared in group A and B were grade 0 or grade 1, while that of group C was more than grade 1.The ADM prepared by NaCl-NaOH maceration had good biocompatibility. There was statistical difference in adhering number of NIH3T3 cells in group A and B. NIH3T3 cells grew well in group A and the resulted ADM was optimized. FBs transfected with Ad-GFP grew well in the optimized ADM. Conclusion The ADM prepared by NaCl-NaOH maceration was a good tissue engineering biomaterial with a little cytotoxicity and rich in resouce.

In order to explore the value of combined detection of atypical lymphocytes (ATL) and transaminase (alanine aminotransferase, ALT; asparate aminotransferase, AST) in the diagnosis of infectious mononucleosis (IM), The data of blood routine and liver function were collected from 54 IM patients, 34 acute hepatitis (AH) patients, 44 upper respiratory infection (URI) patients in Union Hospital during March 2002 to March 2005. Same data were also collected from 40 healthy children as normal control. These data were analyzed retrospectively. Both proportion of atypical lymphocytes and enzyme activity of transaminase were elevated simultaneously (ALT > 40 IU/L, AST > 45 IU/L) in 57.4% (31/54) IM patients. There was significant difference (P < 0.01) between IM group and the other groups. Combined detection of atypical lymphocytes and transaminase can be regarded as a diagnostic marker of infectious mononucleosis.

Objective To study the mechanism of dermal fibroblasts as a feeder layer to support the growth of human keratinocytes. Methods Human dermis fibroblasts were isolated and cultured and then treated with mitomycin-C. The expression of type Ⅰand type Ⅲ precollagen mRNA and relevant protein in feeder layer were examined by RT-PCR and Immunohistochemistry. KCs were cultured both on FB and NIH3T3 feed layer as control, the adhering numbers and the time of fusion were recorded. Results RT-PCR showed an increase of type Ⅰprecollagen mRNA in FB feeder layer as compared with that of normal fibroblasts (P

OBJECTIVE To investigate the clinical characteristics,treatment and prognosis of laryngotracheal stenosis due to relapsing polychondritis (RP).METHODS The clinical data of 6 patients with laryngotracheal stenosis due to RP were reviewed retrospectively.RESULTS From 1996 to 2006,6 patients with laryngotracheal stenosis due to RP were managed in our hospital.Respiratory tract lesions were diffuse and extensive.Of them,4 patients accepted laryngotracheal reconstruction using surgical flaps with or without pedicle,2 accepted dilation of trachea in thoracic segments.Five patients were cured without recurrence.CONCLUSION Treatment of laryngotracheal stenosis due to RP is very difficult.If the surgical opportunity and methods were selected correctly according to each patient,good results can also be obtained.

Objective To observe the feasibility of using bone marrow-derived mesenchymal stem cells (MSCs) as seed cells for tissue-engineering in Otolaryngology. Method MSCs were isolated from bone marrow of human rib and purified by centrifuge and cultured in vitro. The proliferation and growth characteristics of MSCs were observed in primary and passage culture. Result Human bone marrow-derived MSCs showed active proliferation capacity in vitro in primary and passage cultures. Conclusion Human bone marrow-derived MSCs have relatively young biologic age and they can be used as the seed cells for tissue engineering.