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Objective:To explore a set of procedures for the effictive granulation of cartilage,and to construct injectable cartilage graft with platelet-rich gel(PRG),and to evaluate its effects in nude mice models.Methods:The costal cartilage of adult male rab-bits was cut into pieces and placed in a mortar for 30-60 s freezing in liquid nitrogen and grinding for a short time to obtain granular cartilage.Blood was collected from the middle ear artery and PRG was prepared by double centrifugation.Granular cartilage and the mixture of granular cartilage and PRG were injected subcutaneously in nude mice of control group(n=5)and experimental group(n=5)respectively.8 weeks after injection,the gross morphology observation and histological examination were pertormed.The nasal dor-sum augmentation model of nude mice was established in the experimental group.Results:The cartilage particles were in the size of 10-500 pm in diameter after frozen grinding,and injection could be realized.In vitro culture showed that the cell survival rate of granular cartilage reached to 80％.In vivo test showed that the sample morphology of the control group was insignificant,and the sur-face was grainy.That of the experimental group was well maintained,and the surface was smooth with obvious capillaries.The sam-ples of experimental group achieved significant augmentation in the nude mouse model of nasal dorsum augmentation.Conclusion:Freeze-milling technology can achieve efficient granulation of cartilage,and the graft constructed with PRG gel is suitable for maxillo-facial cartilage transplantation repair.
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Objective To study the surgical treatment of the pilonidal disease.Methods The clinical data of 33 cases of the pilonidal disease were retrospectively analyzed from Jul 2007 to Feb 2014.18 cases were treated with Excision and Marsupialization,and 15 cases were treated with Rhomboid excision and Limberg flap.Results All 18 cases in the excision and marsupialization group,were cured by surgery.all 15 cases in the rhomboid excision and Limberg flap group were cured,five of these cases were delayed healing dehiscence or necrosis,all this cases were healed after dressing drainage.The average healing time of the Limberg flap group was shorter than that of the Marsupialization group[(19 ±7) d vs.(37 ± 12) d,t =6.556,P ＜ 0.01].Postoperative recurrence of the Marsupialization group was 1 case,the recurrence rate was 5.6％,and there was no recurrence after Limberg flap transfer.The recurrence rate of the 2 groups was statistically insignificant (P ＞ 0.05).Conclusion The excision and marsupialization and the rhomboid excision and Limberg flap are effective in the treatment of the pilonidal disease,and the Limberg flap transfer is recommended in complicated and recurrence cases.
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The pathogenesis of colorectal cancer is related to genetic and environmental factors. Chronic inflammation of the intestinal mucosa is one of the most important factors in environmental factors. In inflammation factors, Intestinal flora plays a role in bridging and inducing intervention. Environmental changes disrupt the homeostasis of intestinal flora, intestinal flora maladjustment occurred, bacteria induces intestinal mucosal inflammation. The pathogenic bacterium adheres to the surface of the intestinal mucosa, it produces cytotoxic and genotoxic products, intestinal epithelial cells undergo genetic damage. The synthesis and metabolites of bacteria also control the occurrence of colorectal tumor process. This process leads to the progression of inflammation to cancer. This article reviews the process of intestinal flora mediated from inflammation to carcinogenesis, and the latest progress in related pathogenic bacteria, and proposes that the intestinal flora can be adjusted and targeted removal of the conditional pathogenic bacteria, and achieve the goal of cancer prevention. The relationship between intestinal flora, intestinal inflammation and colorectal cancer is reviewed.
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Medical ethics has a long history and rich connotations.It has developed from the simple "medical morality" of ancient times to the modem medical ethics.The basic principles of medical ethics include autonomy,non-maleficence,beneficence,justice,and so on.Researchers often conduct clinical researches in the balance between achievements and ethical norms.Clinical researchers of surgery should have a deep understanding of medical ethical principles and strictly abide by medical ethics.Ethics committee should strictly perform their duties and play the role of inspection and supervision.Modem medical knowledges should be popularized throughout the society to make clinical research correctly understood.Adhering principles of ethics first,people orientation and cooperation practice,with patients' benefit as evaluation criteria,balance of surgical "Dao" and "Shu" can be achieved.
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Objective To observe the efficacy of Tongmai Acupoint Plaster combined with Alprostadil injection for treatment of lower extremity arteriosclerosis obliterans (ASO). Methods Totally 180 cases of ASO Ⅱ(intermittent claudication period) patients were randomly divided into acupoint sticking group, combination group, Western medicine group, with 60 cases in each group. All groups quit smoking, had diet control, proper exercise, control of blood sugar, stop hypolipidemic and anti-coagulation medicine. The acupoint sticking group was treated with Tongmai Acupoint Plaster, each selected with the efficacy of treatment of lower limbs paralysis acupoint 10-12, alternating dressing; dressing was changed 1 time a day, 40 day as a treatment course. Western medicine group was given Alprostadil injection 10 μg, with 10 mL of normal saline, intravenous infusion, once a day, 15 d as a treatment course, for two courses, with 10 d as interval. Combination group was treated with Tongmai Acupoint Plaster combined with Alprostadil injection, the same as the application method above. The clinical efficacy, the scores of symptoms and signs, the ankle brachial index, blood lipid, the peak value of blood flow in the tibial anterior,posterior tibial, and dorsalis pedis arteries were observed and compared between the 2 groups. Results The total effective rate was 78.33% (47/60) in the acupoint sticking group, 80.00% (48/60) in the Western medicine group, and 93.33%(56/60) in the combination group, with the combination group better than the acupoint sticking group and Western medicine group (P0.05). There was statistical significance in scores of symptoms and signs, ankle brachial index before and after treatment in the three groups (P0.05). There was statistical significance in blood lipids before and after treatment in acupoint sticking group and combination group (P<0.05). There was statistical significance in tibial anterior, posterior tibial, and dorsalis pedis artery peak before and after treatment in the three groups (P<0.05, P<0.01). Conclusion Tongmai Acupoint Plaster has good efficacy in the treatment of ASO, equivalent with the efficacy of Alprostadil injection, which can regulate blood lipids and improve arterial blood flow. Ther combination of them has better efficacy.