OBJECTIVETo explore the quantitative relationship between the dust mass concentration and fiber number concentration of refractory ceramic fibres.

METHODSA typical refractory ceramic fiber plant was selected as the study site. Fifty-three paired samples of total dust mass concentration and fiber number concentration were collected using the long-time fixed site mode. The total dust mass concentration was measured according to the GBZ/T 192.1-2007 (Measurement of dust in the air of workplace, part 1: Total dust concentration). Membrane filter method/phase-contrast optical microscopy was used to determine the fiber number concentration. Univariate analysis was used to describe the distribution of the two concentrations and their ratio. Spearman rank correlation, as well as linear regression, logarithmic curve, polynomial, power function, and exponential curve model, were used to explore the relationship between the two concentrations. Results The range of the total dust mass concentration (x) was 0.45-13.82 mg/m3. The range of the fiber number concentration (y) was 0.01-1.04 f/ml. The range of the ratio (x/y) was 4-158. All of the three parameters did not follow normal distribution (P<0.000 1). The two concentrations showed a positive correlation (r,=0.705 22, P< 0.000 1). All the coefficients of determination (R2) of linear regression, logarithmic curve, polynomial, power function, and exponential curve model were relatively low. The trinomial curve model had the highest R2 (0.6848) and the fitted equation was y=-0.001, 1x+0.010 4x2+0.101 4x-0.055 1.

CONCLUSIONThere is a positive correlation between the total dust mass concentration and fiber number concentration of refractory ceramic fibers. However, there is no fixed regression relationship between the two concentrations, and neither is a definite coefficient which can be used to convert each other. The two concentrations cannot be replaced by each other.

Objective To analyze postoperative complications of surgical therapy for deep vein thrombosis (DVT) of the lower extremity. Method From January 2001 to January 2008 vena cava filters were placed in 171 DVT cases before surgery. Fogarty catheter (73 cases), Amplatz thrombectomy device (ATD) (55 cases), Acolysis ultrasound ablation(43 cases) were used to extract the thrombi in iliac and proximal femoral vein. The full extraction of thrombi in distal end was facilitated by compressing and massaging the legs in all cases. Iliac venous stenosis or occlusion was managed by interventional therapy, and temporary femoral arteriovenous fistula were carried out routinly. Result Operations were successful in 157 cases(70 cases in Fogarty group, 52 in ATD group,35 in Acolysis ultrasound ablation group), and failed in 14 cases (3 cases in Fogarty group, 3 in ATD group, 8 in Acolysis ultrasound ablation group). Permanent,retrievable and temporary vena cava filters were placed in 51,32 and 88 cases respectively. Stenosis or occulsions of the iliac vein was found in 143 cases and stents were placed after balloon dilatation in 41 cases. During the operation, residual thrombi was found in 80 cases. Vessel perforation and rupture were complicated in 14 cases, thrombosis adhering in eava vein filters in 18 cases. There was no mortality and no pulmonary thromboembolism. During the follow-up, we found iliae vein restenosis in 21 cases, thrombosis recurrence in 36 cases, stents displacement in 6 cases, and stents fracture in 2 cases. Conclusion Surgical therapy is effective for DVT of the lower extremities.

OBJECTIVE:To observe the efficacy and safety of adjuvant Shensong Yangxin Capsule(SYC)in patients with stable angina(SA)receiving conventional therapy.METHODS:Fifty-eight chronic stable angina(CSA)patients were randomly assigned to 2 groups:the SYC group(n=28)treated with SYC plus conventional therapy while the control group(n=28)with conventional therapy alone.The patients were allowed to take nitroglycerine if number of the angina attacks ≥ 2 per day.The course of treatment fro both groups was 12 weeks.RESULTS:The total ischemic time during 24 hours,the ST segment decreasing amplitude and the frequency of angina pectoris attacks in two groups were all improved significantly after treatment(P

Objective To study the relationship between urinary heparin and human bladder transitional cell carcinoma(BTCC) Methods Reverse polarity capillary electrophonesis(RPCE)in a phosphate buffer was used to determine the value of urinary heparin in 19 patients with BTCC and in 9 normal individuals. Results The value of urinary heparin was (2.37?1.06)?g/L in 9 normal subjects,(1.11?0.45)?g/L in 9 patients with Ta～T 1 BTCC and (0.41?0.13)?g/L in 10 patients with T 2～T 4 BTCC. Conclusions Falling of urinary heparin in BTCC plays an important role in the occurrence and invasiveness of BTCC.

Objective To compare the effect of allogeneic and autologous blood transfusion on postoperative immunoreaction in patients after spinal surgeries.Methods A total of 44 patients undergoing spinal operations were randomly divided into two groups.Allogeneic (n=22) or autologous (n=22) buffy-coat-depleted red cells were used in the patients during the operations.The serum levels of IL-6,IFN-?,and TNF-?were determined preoperatively and then re-measured 1 and 7 days after the operations. Results In theautologous group,both IFN-?and IL-6 increased after the oprerations,the level of IL-6 was significantly higher than that in the allogeneic group at days 1 and 7.The concentration of TNF-?did not change after the surgeries in the two groups. Conclusions By autologous blood transfusion,the serum levels of IFN-?and IL-6 can be increased significantly after spinal operation,meanwhile the concentration of TNF-?remains stable.The postoperative inhibitory effect of the procedure on immunocytokines is significantly weaker than that of allogeneic blood transfusion,indicating that autologous blood transfuion can protect or even increase immunofunction after spinal operation.

Objective To assess the efficacy and safety of interventional combine with surgical therapy of symptomatic portal vein thrombosis (PVT). Methods Seven patients with PVT were treated by surgical thrombectomy, regional medical thrombolysis, and angioplasty or stenting. Resection of part of the small intestine was performed in 2 cases due to enteric necrosis and in 1 case because of enteric stenosis. Results The procedure was successful in all the 7 patients. The preoperative symptoms (abdominal pain, distention, and ascites) were alleviated apparently. Follow-up observations for 3~24 months (mean, 16 months) showed no death. No alimentary tract hemorrhage occurred. Re-examinations with Doppler ultrasonography revealed patent blood flow in the portal vein. Conclusions Interventional combined with surgical therapy is safe and effective in the treatment of symptomatic portal venous thrombosis.

Objective To assess the feasibility,safety,and effectiveness of early rapid icy normal saline infusion to attain mild hypothermia in cardiac arrest patients. Methods A single-center prospective randomized controlled trial was conducted. From March 2011 to October 2013,patients who had recovery of spontaneous circulation (ROSC)after cardiopulmonary resuscitation (CPR)in Beijing Daxing District People's Hospital were randomly divided into two groups. In icy normal saline group,patients received a rapid infusion of 1 000 mL of 4 ℃ normal saline intravenously to attain a mild hypothermia. In the control group,the patients were treated with ice bag on head,and axillary temperature was monitored. For all patients,rectal temperature was measured and recorded immediately and 1 hour later . The occurrence of pulmonary edema on initial chest X-ray at 6 hours ,occurrence of tremor within 48 hours,ventricular fibrillation recurring within 48 hours,and consciousness or death within 14 days were recorded. Results A total of 45 patients were enrolled,including 23 patients in icy normal saline group and 22 in control group. The patients in icy normal saline group had a rectal temperature descended from(36.7±0.9)℃to(34.9±0.7)℃1 hour later,while the patients in control group had a rectal temperature risen from(36.5±1.0)℃to(37.9±0.9)℃1 hour later. There was significant difference in rectal temperature between two groups (t=2.228,P=0.031). The number of patients who successfully awaken within 14 days in ice normal saline group was significantly larger than that in control group (13 cases vs. 7 cases,χ2=65.710,P=0.021). There was no statistical difference in the occurrence of acute pulmonary edema (4 cases vs . 6 cases),tremor (2 cases vs . 0 case),ventricular fibrillation recurrence (4 cases vs. 5 cases)and death within 14 days (11 cases vs. 12 cases,all P>0.05). Conclusions The study shows that early rapid i.v. infusion of 4℃normal saline is feasible,safe and effective for cerebral resuscitation.

Objective To calculate the volume and to study the correlated risk factors of hidden blood loss after artificial hip or knee joint replacement. Methods From July to November in 2008, 38patients with age of (65.11±13.51) years old were treated with artificial hip or knee joint replacement, and were divided by age into four groups. Using Gross formula, total blood loss was calculated depending on height, weight and pre- and post-operation hematocrit, and the hidden blood loss was acquired by subtracting the visible blood loss from the total blood loss. The correlation between age,body mass index( BMI),gender and hidden blood blood loss was observed. Differences of hidden blood loss of artificial hip or knee joint replacement were compared. Results The total blood loss of all arthroplasties was ( 1563.52 ± 693.10) ml,and the hidden blood loss was (538.70 ± 529.77) ml,the percentage of hidden blood loss was 33%. The hidden blood loss was inversely related to age (P＜ 0.05 ). There was no correlation between BMI and hidden blood loss (P＞0.05). The percentage of hidden blood loss in total blood loss in woman was significantly higher than that in man. With age and gender paired, the percentage of hidden blood loss in total blood loss in artificial hip joint replacement was significantly higher than that in artificial knee joint replacement (P＜0.05 ). Conclusions Both of age and gender are risk factors influencing hidden blood loss after artificial hip or knee joint replacement. And compared with artificial knee joint replacement, the percentage of hidden blood loss in artificial hip joint replacement is higher.

Objective To investigate the expression of hypoxia inducible factor-1α(HIF-1α) and vascular endothelial growth factor C(VEGF-C) in colon carcinoma,and their relation with clinical pathological parameters and prognosis. Methods Immunohistochemistry was used to detect the expression of HIF-1α and VEGF-C in 65 tissues of colon carcinoma. Results In all cases,the expression of HIF-1α had a positive correlation with the expression of VEGF-C(r= 0.638,P＜0.01).The expressions of HIF-1α and VEGF-C had significant correlation with clinical stage and nodal metastasis(P＜0.05) ,but had no relationship with sex,age and tumor size(P＞0.05). Conclusion The expression of HIF-1α and VEGF-C was correlated with nodal metastasis, tumorigenesis and prognosis of colon/carcinoma.