Objective To explore the value of laparoscopic diagnosis and treatment for Meckel’s diverticulum in children. Methods Laparoscopic exploration was performed in 11 children with suspected intestinal Meckel’s diverticulum. In other 2 children, the diverticulum was encountered during laparoscopic appendectomy, and then the umbilical incision was prolonged to take out the corresponding intestine for resection. Results No conversions to laparotomy were required in all the 13 children. The operation time lasted 30~90 min (mean, 75 min). The children were discharged at 5~6 postoperative days without complications. Conclusions Laparoscopic diagnosis and treatment for Meckel’s diverticulum in children is effective.

Objective:To investigate the relationship between hearing loss and acoustic neuroma(AN),the tests of pure tone audiometry,acoustic emissions impedance audiometry,audiometry brainstem response(ABR)and evoked otoacoustic emissions(EOAE)wee measured in 14 patients (16 ears)from March 1999 to December 2000.Methods:Fourteen patients (16 ears)with acoustic neuroma (8 males and 6 females,ranging in age from 21 to 72 years old)were diagnosed by CT or MRI scaning,and final confirmed by surgery and pathology.In the auditory tests ,efferent suppression test was curried out only in 4 ears with recordable emissions,promontory stimulation test (PST)was examined only in 5 ears with severe or profound deafness (hearing loss≥80dB SPL)who have no both measurable ABR and recordable EOAE.Results:It was found that 2 ears (12.5%,2/16)of the AN ears showed neural impairment,6 ears (37.5%,6/16)were cochlear impairment and 8 ears (50.0%,8/16)were cochlear-retrocochlear impairment.All of 4 tumors ears with EOAE emission have a disorders of efferent function.Conclusion:EOAE test had significant value for evaluation of the status of cochlear function (at the level of outer hair cells)in AN patients.The retrocochlear auditory nerve function of AN patients were evaluated by the tests of ABR combined PST which showed significant value.Results showed that the hearing impairment of AN have different levels of the peripheral auditory system according to auditory tests,including cochlear,eighth cranial nerve and efferent nerve level at the same or independently.

Electrocardiography ; Humans ; Long QT Syndrome

Objective To explore the therapeutic mechanisms of nitric oxide donor (SIN 1) in ischemic acute renal failure (IARF). Methods The effects of SIN 1 on intercellular adhesion molecule 1 (ICAM 1) expression and inflammatory cell infiltration in rat kidney after ischemia/reperfusion (I/R) injury were examined using ICAM 1, ?2 integrin polyclonal antibody, and immunohistochemistry. The renal functions were measured simultaneously. Results Progressive increased expression of ICAM 1 was found in kidneys, especially in vasa recta, after IR injury. ?2 integrin positive cells increased simultaneously in the outer medulla. The two indexes reached the peak values at 24 h after I/R injury. SIN 1 infusion at the beginning of reperfusion could remarkably inhibit the enhanced ICAM 1 expression, reduce the local infiltration of inflammatory cells, and ameliorate the renal functions. Conclusion NO donor can inhibit the renal expression of ICAM 1 and the infiltration of leukocytes after ischemia reperfusion injury, which may play an important role in the treatment of ischemic acute renal failure.

Objective: To investigate the impairment status of vestibular and limb peripheral nerve of patients with auditory neuropathy, improve the understanding of auditory neuropathy in general. Method: Vestibular function tests and nerve conduction velocity (NCV) examinatoin were performed on 28 young patients with auditory neuropathy which confirmed by clinical auditory tests diagnosis from March 1999 to November 2000. There were 14 males and 14 females, ranging in age from 22 to 28 years old. Results: Vestibular dysfunction was encountered in 22 of 28 (78.57%) suffering from auditory neuropathy. Limb peripheral nerve impairment was found in 11 of 28 patients (39.29%) of auditory neuropathy. The caloric responses were normal symmetric responses in 6 of 28 (21.43%,6/28), and weaken bilaterally in 20 of 28 (71.43%,20/28)respectively. On the NCV examination, both motor conduction velocity (MVC) and sensory conduction velocity (SCV) were normal in 17 (60.71%,17/28), abnormal in 4 (14.29%,4/28). Four cases showed abnormal MCV and SCV. And pure MCV abnormality and pure SCV abnormality were found on 4 and 3 cases respectively. Conclusion: The pathological process affecting the auditory nerve may also affect the vestibular nerve and other peripheral nerve. This seemed possible in view of fact that auditory neuropathy may affect one nerve (mononeuropathy) or multiple nerves (polyneuropathy).

Objective To investigate the changes of osteopontin (OPN) expression in murine colitis induced by dextran sodium sulfate (DSS) and its role in inflammatory bowel disease (IBD).MethodsThirty-two male BALB/C mice were randomly assigned into 4 groups: control group (group A), DSS-induced murine colitis model group (group B), salazosulfapyridine treatment group (group C) and infliximab treatment group (group D). Plasma OPN concentration was measured by enzyme linked immunosorbent assay (ELISA). OPN mRNA level was detect by using reverse transcriptase polymerase chain reaction (RT-PCR) and protein expression in colonic tissues was analyzed by using Western blotting. The location expression of OPN in colonic tissues was determined by immunohistochemical staining. ResultsIn group A, B,C and D, the plasma concentrations of OPN were (5.26±1.93) ng/ml, (10.21±2.37) ng/ml, (4.58±1.83) ng/ml and (4.82±1.83) ng/ml,respectively: the mRNA levels of OPN in colonic tissues were (0.36±0.16), (0.71±0.17),(0.32±0.07) and (0. 34±0. 08), respectively; the protein levels of OPN in colonic tissues were (0.44±0.10), (0.85±0.04), (0.61±0.11) and (0.58±0.17), respectively. The OPN-positive cell numbers in lamina propria mononuclear were (46.6±10.9), (155.5±43.8), (73.1±6.8) and (70.6±8.3), respectively. The expression of OPN in group B was significantly higher than that in group A (P<0.05). Compared with group B, the expressions of OPN in group C and D were significantly decreased (all P valus <0. 05). No significant difference was detected between group C and D. Conclusions The study shows that the expression of OPN significantly increased in DSS-induced murine colitis and decreased after treated with drugs. OPN-mediated immune response contributes to DSS-induced murine colitis.

Objective To investigate the effects of different doses of ulinastatin on severe thermal injuryinduced myocardial damage in rats. Methods One hundred and eighty female SD rats weighing 180-220 g were usedin this study. Thirty percent of the total body surface (TBS) was shaved chemically with 20% sodium sulphate and then exposed to 92 ℃ water for 18 s. The animals with third degree thermal injury involving 30% of the TBS were randomly divided into 3 groups (n = 60 each): group Ⅰ thermal injury (group TI); group Ⅱ and Ⅲ received intraperitoneal ulinastatin 40 000 and 80 000 U/kg respectively immediately after thermal injury (group U1 , U2). The TI group received equal volume of normal saline IP instead of ulinastatin. Blood samples were taken from abdominal aorta before (baseline) and at 1, 3, 6, 12 h after thermal injury for determination of serum concentrations of cTnI, IL-1β, IL-6, IL-10 and TNF-α (10 samples at each time points). Ten animals were sacrificed at each time point after blood sampling. The myocardial specimens were obtained for microscopic examination and measurement of MDA content and SOD activity. Results Compared with group TI, the serum concentrations of cTnI, IL-1β, IL-6 and TNF-α and MDA content in myocardium were significantly decreased and the myocardial SOD activity was significantly increased in group U1 , while in group U2 the senum concentrations of cTnI, IL-Iβ, IL-6 and TNF-α and myocardial MDA content were significantly increased and the myocardial SOD activity was significantly decreased. There was no siginificant difference in the serum concentrations of IL-10 among the three groups. Microscopic examination showed that myocardial damage was accentuated in group U2 as compared with group U1. Conclusion Ulinastatin 40 000 U/kg can ameliorate severe thermal injury-induced myocardial injury through inhibition of inflammatory response and lipid peroxidation response, whereas ulinastatin 80 000 U/kg accentuates myocardial damage.

To ensure the quality and safety of Panax notoginseng, a method for the simultaneous determination of 10 mycotoxins in Panax notoginseng was developed using ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The sample was extracted with acetonitrile and purified by HLB multifunction cleanup column. The separation was performed on a Phenomenex Kinetex XB-C18 column by gradient elution using methanol and 5 mmol·L(-1) ammonium acetate as mobile phase. The targeted compounds were detected in MRM mode by mass spectrometry with electrospray ionization (ESI) source operated in both positive and negative ionization modes. The linear relationships of the 10 mycotoxins were good in their respective linear ranges. The correlation coefficients (r) ranged from 0.9981 to 1.0000. The LOQs of the 10 mycotoxins were between 0.15 and 8.6 μg·kg(-1). The average recoveries ranged from 73.8% to 107.0% with relative standard deviations (RSDs) of 0.10%-10.9%. The results demonstrated that the proposed method was sensitive and accurate, and suitable for the mycotoxins quantification in Panax notoginseng.
Chromatography, High Pressure Liquid ; Chromatography, Liquid ; Drug Contamination ; Mycotoxins ; analysis ; Panax notoginseng ; chemistry ; Tandem Mass Spectrometry

BACKGROUND:In recent years, many manufacturing techniques have been recently developed for soft tissue engineering scaffolds. Especialy additive manufacturing with a unique material accumulated forming principle can be feasible and reliable to manufacture the highly precise scaffolds with gradient structures and multi-materials for large soft tissue defect repairing.
OBJECTIVE:To summarize scaffolds manufacturing technologies in the soft tissue engineering applications developed in recent years and to predict the direction of development.
METHODS: A retrieval was performed for the literature about the manufacturing methods of soft tissue scaffolds using key words of “additive manufacturing, microfabrication, vascular tissue engineering, muscle tissue engineering, cartilage tissue engineering, stereolithography, 3D printing, biodegradable hydrogel” in English and Chinese, which were published between January 2010 and September 2013 in PubMed Database and China National Knowledge Infrastructure (CNKI) Database.
RESULTS AND CONCLUSION:For large soft tissue defects repairing, structure design of the scaffolds has been shifted from a simple planar structure to a more complex three-dimensional structure, and integration of scaffold structure, materials and cels, and growth factors during the manufacturing procedure can be used to obtain the resolution of vascularization. Additive manufacturings become one of the most promising approaches for the ideal soft tissue scaffolds with gradient and complex structure and multi-materials. In particular, the hydrogel/cellcomposite scaffolds fabrication, a hot but promising approach to develop the soft tissue engineering wil be made progress by the accurate principles and processes of the hydrogel additive manufacturing combined with the introduction of living cels and growth factors.

Animals ; Comet Assay ; DNA Damage ; drug effects ; Lymphocytes ; drug effects ; Male ; Organometallic Compounds ; toxicity ; Rats