China ; Equipment and Supplies ; Organization and Administration

Objective To explore the feasibility of the ultrasonic atomization surface anesthesia with lido-caine for awake fiberoptic endotracheal intubation in patientsˊautonomous position -display before general anesthesia and to evaluate its advantages.Methods 68 adult patients who needed prone position for elective surgery under general anesthesia were selected and randomly divided into two groups,the control group and the treatment group,each group in 34 cases.In control group patients were received surface anesthesia of cricothyroid membrane puncture.In treatment group,nebulized 2% lidocaine with ultrasonic nebulizer was used for topical anesthesia.Patients lied in the prone position according to their own comfort with the guide of the medical staff in the waking state after an awake fiberoptic endotracheal intubation.The statistics of mean arterial pressure (MAP)and heart rate (HR)were recorded respectively in the basal state(T0),in the time instantly after intubations(T1 ),in the 3 minute after intubations(T2 ) and in the time instantly after the body turning(T3 ).Choking cough response were recorded during endotracheal intubation.Patients were asked the efficacy of surface anesthesia and the tolerance for awake intubation after operation.Results Patients in both two groups completed the whole process smoothly.MAP and HR had no signifi-cant differences between the two groups in the same time point (all P >0.05).There were no statistical significance between the two groups in choking cough response,the time of surface anesthesia and intubation,neither (all P >0.05).Conclusion The surface anesthesia with lidocaine by continuous ultrasonic atomizing inhalation is a good and simple method deserving generalization with plenty merits and is practicable for patients to display position autonomously. This method have the advantages of small operation,it will and can replace cricothyroid membrane puncture.

Objective To explore the effect of high dose external beam radiation on the ePTFE prosthesis-arterial anastomosis.Methods The infrarenal abdominal aorta was replaced by ePTFE prosthesis graft in 20 dogs,and all the animals were randomly divided into 2 groups,including of irradiated groups and the control groups,which were or were not associated post-operative external radiation(35 Gy) to the anastomosis.All the animals were sacrificed at 4 weeks and 8 weeks after operation for histological and immunohistochemical examination of the prosthesis-arterial anastomosis.Results There was marked histological changes caused by 35 Gy external irradiation at the prosthesis-arterial anastomosis,but no disunion,rupture,or aneurysm was found at the anastomosis.Radiation did not increase the rate of thrombosis at the prosthesis.The result of immunohistochemical examination showed that two side of the anstomosis were CD34 positive.Conclusions High dose of external beam(35 Gy) can cause marked histological changes at the prosthesis-arterial anastomosis,however,it will not exert negative effect on anastomosis in the short term.

Objective To study the role of photoallergens and contact allergens in the pathogenesis of chronic actinic dermatitis (CAD).Methods Ba sed on the standard procedures of photopatch test recommended by the British Pho todermatology Group (BPG) and the routine procedures of patch test,photopatch a nd patch tests were performed on 56 patients with CAD,42 patients with polymorp hous light eruption (PLE) and 25 patients with chronic eczema on scalp and face by standard photopatch test series recommended by the International Contact Derm atitis Research Group (ICDRG) and home-made standard series of contact allerge ns.A set of ten Philips TL20W/09N tubes was used as the source of irradiation.Results In the 56 CAD patients,the positive rates were 46.43 %,57.14 % and 32.14% for photopatch test,patch test and both tests,respectively,which appea red to be significantly higher than those in the patients with PLE.Positive pa tch reactions were found in 65% of the patients with chronic eczema,which was s imilar to that of CAD.And the frequency of the positive allergens in chronic ec zema was the same as that in CAD,in which fragrance mixture (FM) ranked the fir st,followed by balsam of Peru (BOP),cobalt chloride,nickel sulphate.In CAD,FM and BOP were the most common allergens and photoallergens,which accounted fo r 44% and 32% of the positive reactions in patch tests,15.38% and 17.95% in pho topatch tests,respectively.Conclusions Both photoallergens and contact aller gens may play important roles in the pathogenesis of CAD.Allergens positive in patch tests and photopatch tests and related compounds which can cause cross-r eactivity with the above allergens should be avoided by the patients with CAD.

Objective To study the precipitating factors, clinical features, histopathological changes and treatment in patients with localized and generalized granuloma annulare (GA). Methods Clinical data of 24 cases of localized GA and 19 cases of generalized GA were analyzed retrospectively. Results Some cases of GA were found to be related to the exposure of sunlight, especially in the generilized patients. In the patients with localized GA, lesions usually distributed on the dorsal surface of the hands, nape of the neck, dorsum of feet. Annular lesions with 1-2 centimeters in diameter were formed by small papules. The largest lesion was 7 centimeter in diameter. Generalized GA presented as a diffuse papular eruption, 0.5 ~ 1 cm in diameter, and the lesions favoured the trunk and four limbs. The histopathological study showed that palisading granuloma pattern accounted for 61.9% in all patients, and scattered histiocytic infiltration accounted for 38.1%. Ultraviolet light avoidance, topical steroids, cryotherapy, surgical excision, systemic vitamin E or nicotinamide were effective for localized lesions. Systemic administration of chloroquine in low dosage was an alternative way for the stubborn localized GA. Systemic chloroquine, dapsone, corticosteroids, isotretinoin were effective in most generalized GA cases, but some cases relapsed when treatment was stopped. Conclusions Ultraviolet may be associated with the development of generalized GA. The histopathological changes were variable, the palisading granuloma pattern is the most common pattern. Topical therapy is effective in localized GA, and systemic therapy is mainly used for generalized GA.

Objective To study CT findings of gastrointestinal lymphoma.Methods Conventional and enhanced CT data of 25 gastrointestinal lymphoma patients proved pathologically by gastroscope(8 cases),enteroscope(3),operation(5)and lymph node of neck puncture(9) were retrospectively analysed.Results All cases were secondary gastrointestinal lymphoma except one primary located in cardia.CT manifestations of gastric lymphoma included three kinds:(1)Widespread infiltration or multiple type (9 cases);(2)Limited type(3 cases);(3)polypus type(1 case):which had not been found by gastroscope.The CT value range of tumor was 20～42 HU with average of 31.3 HU.Most tumours showed homogeneous contrast enhancement.Enhanced value range of tumor was 15～33 HU with average of 23.5 HU.CT manifestations of intestinal lymphoma included:(1)Multiple nodus type(4 cases);(2)infiltration type(5 cases);(3)mesentery involved type(3 cases);(4)lump type(3 cases).Thickening mural were homogeneous except one showed low attenuation in the center of one extremely thickening wall.Conclusion Gastrointestinal lymphomas have slight to medium enhancement on comtrast-enhanced CT,while the medium enhancement is characteristic finding of this lesion.

Objective To observe the expression changes of CD34 and M30 in skin homogenate from a mouse model of scleroderma after irradiation with different doses of UVA1, and to investigate the effect of UVA1 phototherapy on vascular endothelial cell function in scleroderma. Methods The experimental mouse models of scleroderma were established by the injection with bleomycin and randomly divided into model control group (n = 10), UVA1 irradiation group (n = 30) and unirradiated group (n = 10). The UVA1 irradiation group was further equally divided into 3 groups, HD-UVA1 group irradiated with UVA1 at 100 J/cm2, MD-UVA1group with UVA1 at 60 J/cm2, and LD-UVA1 group with UVA1 at 20 J/cm2; phototherapy was performed thrice weekly for 10 weeks followed by the sacrifice of mice. The mice in model control group were killed immediately after the establishment of models, and the mice in unirradiated group received no irradiation after the establishment of models and were maintained till the killing of mice in UVA1 irradiation groups. Skin specimens were obtained from the bleomycin-induced scleroderma lesions of mice and separated into two parts, one was subjected to histopathological examination, and the other one was used to prepare skin homogenate for the detection of CD34 and M30 content with ELISA assay. Results After 30 sessions of treatment with UVA1,the softening and thinning of sclerotic skin were seen by the naked eye, with the most obvious changes in HDUVA1 group; pathological examination revealed a reduction in dermal thickness and the presence of hair follicular structures in subcutaneous fat tissue with no obvious proliferation of collagen in these mice. Compared with the mice in model control group and unirradiated group, there was an increase in CD34 and decrease in M30 content in skin homogenate from UVA 1-irradiated mice, with the most marked changes in mice irradiated with UVA1 at 100 J/cm2. The concentration of CD34 and M30 in skin homogenate from unirradiated group and model control group was significantly different from that in HD-UVA1 group (22.25 ± 8.91 μg/L and 31.97 ±17.97 μg/L vs. 72.39 ± 13.04 μg/L, 162.41 ± 58.00 U/L and 195.71 ± 71.09 U/L vs. 38.06 ± 19.89 U/L, all P ＜ 0.01 ). Additionally, significant differences were observed between the three UVA1 groups in the concentration of CD34 and M30 (F = 21.23, 15.32, respectively, both P ＜ 0.01 ). Conclusions UVA1 phototherapy could up-regulate the expression of CD34 but down-regulate that of M30 in skin homogenate from the mouse model of scleroderma, and the effect is correlated with the intensity and cumulative dose of irradiation.

Objective To study the relationship of sunlight exposure and photoprotection with clinical activity in systemic lupus erythematosus. Methods A structured questionaire was administered to 107 SLE patients, to assess their attitudes and behavior regarding sunlight exposure and photoprotection. The clinical manifestations, laboratory findings and treatment were evaluated. Results All patients were classified into two groups based on the duration of exposure to sunlight per day. Fourty-eight (44.86%) patients were exposed to direct sunlight for an average of less than one hour per day in one group and 59 (55.14%) for one hour or more in the other group. Twenty-four (22.43%) patients reported use of photoprotective measures in spring and summer. The patients in the former group had significantly lower incidences of photosensitivity, arthritis, alopecia, exacerbations, presence of anti-dsDNA antibody, decrease of complement C3, C4 and CH50 than those in the latter group(P

0.05) between the radiotherapy and control groups,and the coverage of vascular endothelial cell was incomplete in each group;8 weeks after surgery,the intimal thickness of radiotherapy group was statistically thinner than that of control group(P

Objective To evaluate the neuroprotective effect and possible mechanisms of edaravone(3-methyl-1-phenyl-2-pyrazolin-5-one) in neonatal Harlequin(Hq) mutant mice brain after hypoxia-ischemia brain injury(HIBD) insult.Methods The nine-day-old male Hq mutant mouse pups were assigned randomly either edaravone(n=16) and vehicle(n=17) treatment group.The Hq mice were subjected to left common carotid artery occlusion combined with inhalation 100 mL/L oxygen for 45 minutes.The mice were injected intraperitoneally either with edaravone(10 mg/kg) or equivalent volume of saline immediately after artery occlusion and after hypoxia.Nitrotyrosine and lipid peroxidation formation were evaluated at 3 h and 24 h after hypoxia-ischemia(HI) by using immunohistochemistry staining.Nitrotyrosine formation and caspases activation were evaluated either by immunoblotting or fluorogenic activity measurement at 24 h after HI.Brain injury was evaluated at 72 h by neuropathological score and calculating the infarct volume.Results Brain injury encompassed cortex,hippocampus,striatum and thalamus.Edaravone treatment reduced brain injury significantly in all the brain regions.The total infarct volume was reduced 52.8% in edaravone treatment group compared with vehicle group(P