PurposeTo investigate the multi-slice spiral CT features of lung primary invasive mucinous adenocarcinoma, a rare malignancy with few relevant literature. Materials and Methods Forty-one patients with pathology proven primary invasive mucinous adenocarcinoma of the lungs underwent MSCT examination, of which 27 patients received intravenous contrast. Imaging features were analyzed, and the patients were divided into groups according to morphology, density and enhancement.Results For 41 patients, 40 cases had one lesion, and one case had more than one lesion; the lesions were in the right upper lobe in 5 cases, right middle lobe in one case, right lower lobe in 17 cases, left upper lobe in 5 cases, and left lower lobe in 12 cases. There was solitary lesion in 40 cases. The other patient had multiple lesions. 29 cases showed nodules/masses, while non-mass lesions in 12 cases. Ground glass opacity was seen in 4 cases, single consolidation in 11 cases, and mixed consolidation in 26 cases. There was significant contrast enhancement in nodules/masses compared to non-mass lesions (t=5.00, 6.51 and 14.06,P<0.05).Conclusion MSCT shows a diversity of imaging features of primary invasive mucinous adenocarcinom, including single round lesion, lower lobe in both side; the density is lower than muscle on CT scan, and presents mild to moderate enhancement on enhancement scan round lesions has high density and enhancement range than irregular-shaped lesions.

Objective To explore the clinical prognostic significance of arterial blood lactate level and early lactate clearance rate in elderly septic patients. Methods Totally 82 elderly septic patients who were admitted into emergency department were enrolled.Their arterial blood lactate levels were tested at admission and 6 hours later. Early lactate clearance rate was calculated as following:(lactate level of admission minus lactate level of 6 hours later) /lactate level of admission ×100 ％. Heart rate and blood pressure were recorded at admission,and the acute physiology and chronic health evaluationⅡ (APACHE Ⅱ ) score was evaluated in the first 24 hours.28 days after admission was the end of research.Patients were divided into survival group (n=59) and death group (n=23).Taking 10％ as cut-off,patients were divided into high lactate clearance (≥ 10％) group (n=59) and low lactate clearance (＜10％) group (n=23).Values of arterial blood lactate level,APACHE Ⅱ score and early lactate clearance to predict the prognosis of elderly septic patients were determined by ROC curves. Results Arterial blood lactate level was lower in survival group than death group[(2.4± 1.7)mmol/L vs.(3.9±3.2)mmol/L,P＜0.01].Early lactate clearance was higher in survival group than death group [(339.0 ± 28.0) ％ and (300.0 ± 81.0) ％,P ＜ 0.01].Mortality of high lactate clearance group was decreased as compared with low lactate clearance group [18.6％ (11/59) and 52.2％ (12/23),P＜0.01].The thresholds of early lactate clearance to predict mortality of elderly septic patients were 24.0％ (sensitivity 72.9％,specificity 65.2％) which was more valuable than APACHE Ⅱ score ( sensitivity 65.2 ％,specificity 57.6 ％). Conclusions Arterial blood lactate level and early lactate clearance were meaningful predictors for prognosis of elderly septic patients.

OBJECTIVE: To understand the usage of MP3 and effects on hearing of middle school students in Xi'an, and discuss controlling strategies. METHOD: Stratified random cluster sampling method was used in the 1567 middle school students in Xi'an through questionnaire survey, ear examination and hearing examination, data were analysed by the SPSS13.0 statistical software. RESULT: 1) The rate of holding MP3 in the middle school students was 85.2%. Average daily use time was (1.41 +/- 1.11) h. 2) The noise group of pure tone hearing threshold was significantly higher compared with the control group (P<0.01), and increased the detection rate of hearing loss with the increasing use of MP3. 3) The detection rate of symptoms increased with the increasing use of MP3. CONCLUSION The usage of MP3 can harm hearing in middle school students, which can result in neurasthenic syndrome.
Adolescent ; Audiometry, Pure-Tone ; Auditory Threshold ; Data Collection ; Female ; Hearing Loss ; etiology ; Hearing Tests ; Humans ; MP3-Player ; Male ; Students ; Surveys and Questionnaires

Objective To explore the prognostic value of B-type natriuretic peptide (BNP) for 28-day mortality of elderly patients with non-cardiac critical ill in emergency intensive care unit (EICU). Methods A total of 70 elderly non-cardiac critically ill patients (age≥60 years) in EICU were enrolled, and the blood samples were collected to detect BNP level after the patients' admission to EICU. After 28 days, the mortality was assessed. Results Twenty-two patients (31.4 %) died during 28 days observation, whose BNP levels were significantly higher than that of the survivors [ln BNP: (6.4 ± 1.2) ng/L vs. ( 5. 1 ± 1.5 ) ng/L, P＜ 0. 05] ; BNP level had an area under the receiver operating characteristic curve of 0. 759 (95% CI: 0. 636-0. 882, P＜0.05) for predicting mortality,and the optimal cut point of BNP was 342 ng/L (sensitivity 77.3%, specificity 68.7%).Conclusions BNP level could be a predictor for 28-days mortality for elderly non-cardiac critically ill patients.