Computer simulation cardiac function values were calculated at different heart rate level, including left ventricular ejection fractions (LVEF), stroke volume (SV), cardiac output (CO) and so on, which was aimed to observe the effects of heart rate on cardiac function. It showed that the simulation results of LVEF, SV and CO were reliable at a low heart rate with linear regression model, but unreliable at a high heart rate. CO reached its maximum value when heart rate was 100 times per minute. Heart function values varied with heart rate. The effect of heart rate should be paid much attention to when heart function report was read.

Objective To investigate lead pollution of tap in market. Methods 16 taps (2 PPR taps and 14 metal taps)were collected and were sunk in distilled water for 4 hours,8 hours and 12 hours. Lead levels in the distilled waters were determined by atomic absorption spectrometry. Results No lead was detected for PPR taps. Of 14 metal taps,only one tap was not observed lead pollution. The top lead level was 56.54 ?g/L,the median was 5.79 ?g/L. These brass taps resulted in higher lead pollution than those taps with ceramic preformed core (P0.05). 72.2% of the samples with brass preformed core exceeded 10 ?g/L and only 9.5% for those taps with ceramic preformed core. These taps with registered trade mark had a slighter lead contamination than those without registered trade mark(P

Objective To assess the epidemiology and clinical characteristics of sleep disorders in a single center in northwest China.Methods Using the International Classification of Sleep Disorders, 3rd Edition, all consecutive patients which were suspected as sleep disorders in Tangdu Hospital between January 2007 and December 2016, were included retrospectively.Results The average age of 8 037 patients was (46.59±15.83) years with male-female ratio 1∶1.24.Chronic insomnia was found in 3 848 (47.9%) patients, obstructive sleep apnea was found in 2 648 (32.9%) patients, narcolepsy was found in 294 (3.7%) patients, Kleine-Levin syndrome was found in 11 (0.1%) patients, circadian rhythm sleep-wake disorders were found in 14 (0.2%) patients, rapid eye movement behavior disorder was found in 193 (2.4%) patients, restless legs syndrome was found in 139 (1.7%) patients, periodic limb movement disorder was found in 109 (1.4%) patients, and other possible sleep disorders were found in 478 (5.9%) patients, respectively.Chronic insomnia and obstructive sleep apnea combided with somatic diseases.Conclusions Patients diagnosed by polysomnography in our single center suggested consultation rate of sleep disorders was increasing in past ten years, of which chronic insomnia and obstructive sleep apnea were dominant and comorbided with somatic diseases.

Objective To understand the relationship among junior college students' anxious status in testing and studying behaviors and studying result. Methods TAS anxiety scale was used for the evaluation of anxious status, and data were analyzed by SPSS software. Results Statistical significance was observed among different specialties. Sex, socioeconomic status and living environment did not affect TAS score. The higher the anxious status was, the worse the studying results will be. The anxious status was associated with some studying behaviors. Conclusions Anxiety was correlated with specialities and studying behaviors, and affected studying result.

Objective To investigate the clinical value and effect of spinal nerve medial branch ablation through transforaminal endoscopic in treatment of lumbar zygapophysial joint pain. Methods From August 2008 to October 2013 ,96 patients diagnosed as lumbar zygapophysial joint pain were included in the research. 36 patients were treated by spinal nerve medial branch ablation through transforaminal endoscopic ,while 60 patients received conservative treatment. The visual analogue scale (VAS) and Japanese Orthopedics Association(JOA) scores before treatment,1,3,6 and 12 months after treatment were recorded and analyzed. The MacNab scores were recorded and analyzed 12 months after treatment. Results The VAS and JOA scores of surgical treatment group showed significant improvement compared with that before operation (P < 0.05),and there were no significant difference at each time point after surgery. The VAS and JOA scores of conservative treatment group in showed significant improved at 1 months after treatment compared with that before treatment(P<0.05),but there were no significant difference at each time after treatment compared with pretreatment. The VAS and JOA scores of surgical treatment group showed significant improvement compared with conservative treatment group at each time after treatment(P<0.05). The MacNab scores of surgical treatment group(94.44%)was significantly higher than that of conservative treatment group(33.33%). Conclusion The spinal nerve branches ablation under transforaminal endoscopic is an effective and safe minimally invasive spine surgery technique with important clinical value in the treatment of lumbar zygapophysial joint pain.

Objective Carbon dots (CDs) are an emerging carbon nano-material which is environmentally-friendly, economical , efficient and stable .Their fluorescence properties can match the semiconductor quantum dot .Moreover , CDs have more excellent biocompatibilities .The purpose of this experiment is to apply CDs to the fluorescent immune probe to make them a new label , which can replace the traditional fluorescent dyes .Methods Using microwave heating method , the high strength fluorescent carbon dots were prepared .Wtih the EDC coupling method , the high strength fluorescent car-bon dots could bond with Escherichia coli antibodies to form a complex immune fluorescent probe .Specific recognition exper-iments were carried out in the model of E.coli O157∶H7.Results CDs were successfully applied to immune recognition of E.coli O157∶H7 and multicolor fluorescence was observed .Conclusion CDs can serve as a label of the fluorescent im-mune probe , and are expected to become a new type of low toxicity biosensor with independent intellectual property rights .

Objective To study the values of serum CA19-9,CA242,CEA,alone or in combination in the diagnosis and prognosis of combined hepatobiliary calculus and cholangiocarcinoma (HCWC).Method Serum CA19-9,CA242,CEA in 100 patients with HCWC,70 patients with hepatobiliary calculus combined with cholangitis and 30 patients with hepatic hemangioma (normal bile duct group) were preoperatively studied.Results When the serum levels of CA19-9,CA242,CEA were separately used in the diagnosis of HCWC,the sensitivity of CA19 9 was highest,but its specificity was significantly lower than that of CA242 and CEA (P＜0.01).Patients with all the three tumor markers raised had significantly lower survival than those of patients with only one or two raised markers (P＜0.05).Conclusions The diagnostic rate for CA19 9 in HCWC was better than that of CEA and CA242.A joint detection improved the diagnostic specificity.Raised tumor markers were associated with progression of HCWC.Survival was worse in patients with 3 raised markers than those with 2 or 1 raised markers.

Objective To describe clinical features,polysomnographic (PSG) alterations and characteristics of motor and distribution during rapid eye movement (REM) sleep in narcoleptic patients with REM sleep behavior disorder (RBD).Methods We retrospectively summarized general features of 22 narcoleptic patients with RBD,96 narcoleptic patients without RBD and 21 healthy subjects as controls.We compared their PSG and the related indexes in 3 groups.Then we analyzed a full-night video-PSG recording in a continuous series in 22 narcoleptic patients with RBD to identify their motor behavior and distribution features.Results There was no significant difference in PSG parameter and correlation index between the narcoleptic patients with RBD group and without RBD group.However,compared with normal control group (20.15 ± 4.52),narcoleptic patients with or without RBD (24.07 ± 5.44,23.40 ± 4.50) showed increased the body mass index(F =4.869,P =0.009),shortened NREM sleep and REM sleep (min) latency at night (4.41 ±7.01,3.55 ±3.98 and 14.69 ±9.62,x2 =31.697,P =0.000;69.39 ±81.39,71.04 ±74.45and 115.31 ± 45.13,x2 =11.485,P =0.003),increased percentage of sleep stage 1,decreased percentage of slow wave sleep,delayed the arousal time and increased number of arousal episode longer than 5 minutes.In narcoleptic patients with RBD,RBD episodes occurred frequentlyatany stage of REM sleep through whole night and the frequency of vocalizations did not significantly differ between the two halves of the night.Pantomimes were significantly more frequent in RBD episodes of the second half of the night.Conclusions The prevalence of RBD is high in narcoleptic patients.Sleep architecture doesn' t differ between narcoleptic patients with and without RBD.There is no correlation between the occurrence of RBD and narcoleptic duration.In narcoleptic patients with RBD,vocalizations and pantomimes accounted formajor proportion of RBD episodes while aggressive-violent movements are rare.

Objective To observe the effects of hydrocortisone on the rate of return of spontaneous circulation(ROSC)and the outcome of patients with cardiac arrest(CA)and cardiopulmonary resuscitation(CPR). Methods A cohort study was conducted,78 non-traumatic patients with CA were divided into hydrocortisone group (31 cases)and control group(47 cases). Conventional treatments were given in the two groups after admission,and additionally intravenous 100 mg hydrocortisone was given to the hydrocortisone group during resuscitation. The ROSC rate and prognosis were compared between the two groups. Multivariate logistic regression analysis was used to predict the impact factor of ROSC. Results The ROSC rate and 24-hour survival rate in the hydrocortisone group were significantly higher than those of the control group(ROSC rate:58.1% vs. 40.4%,24-hour survival rate:48.4%vs. 36.2%,both P<0.05). There were no significant differences between the hydrocortisone and the control groups in duration of CPR〔minute:17.1(6-45)vs. 15.8(7-48)〕,acute physiology and chronic health evaluation Ⅱ(APACHE Ⅱ)score in survivors(37.2±8.2 vs. 36.1±8.2),the survival rate(12.9% vs. 12.8%)and hospital discharge rate(6.4%vs. 6.4%)in 7 days. Hydrocortisone〔odds ratio(OR)=3.12,95%confidence interval(95%CI)-1.18-8.29, P=0.017〕and witness(OR=4.24, 95%CI -1.87-12.43,P=0.008) were independent predictors for an increased ROSC rate after multiple logistic regression analysis. Conclusion Giving hydrocortisone during resuscitation may increase ROSC rate in CA patients.

Objective To obtain reasonable treatment by urodynamic detection and analysis in patients with diabetic cystopathy (DCP) complicated with benign prostatic hyperplasia (BPH).Methods Sixty patients with DCP complicated with BPH were selected,among the total 32 patients (duration of diabetes ＞ 12 years,blood glucose control was not ideal) were recognized as experimental group,and 28 patients (duration of diabetes ≤ 8 years,blood glucose control was stable) were recognized as control group.Using the Laborie UDS-120XLT urodynamic detection instrument,the urodynamic was detected and the international prostate symptom score (IPSS) was evaluate,and the results were compared between the 2 groups.Results There was no statistical difference in residual urine volume between experimental group and control group [(146 ±71) ml vs.(160 ±64) ml,P ＞0.05].The maximum urinary flow-rate in experimental group was significantly lower than that in control group [(5.4 ± 2.0) ml/s vs.(8.0 ± 3.2) ml/s],the symptom total score of IPSS was significantly higher than that in control group [(25.8 ± 4.1) scores vs.(22.6 ±5.0) scores],there were statistical differences (P ＜0.01).The maximum bladder capacity,compliance,incipient micturition desire volume in experimental group were significantly lower than those in control group,there were statistical differences (P ＜ 0.01).Conclusions The influence of DCP on the function of the bladder in BPH patients is significant.Urodynamic detection can provide objective basis for the selection of therapeutic methods,suitable to be operated and forecast the postoperative effect.It has an important reference value in DCP complicated with BPH patients.