OBJECTIVETo explore the features of various mediastinal lymphadenopathies using computed tomography perfusion (CTP).

METHODSCTP parameters (CTPs) of the selected mediastinal nodes from 59 patients with pathology-proven malignant lymph nodes and of those from 29 patients with clinically diagnosed or pathology-proven inflammatory lymphadenopathies were collected. Patients were divided into subgroups by etiology and phase of primary disease, including different pathological malignant nodes and diverse inflammatory nodes. CTPs were defined as blood flow (BF), blood volume (BV), mean transit time (MTT), permeability (PMB), and time to peak (TTP). Differences of CTPs were compared between malignant and benign nodes, and among subgroups, respectively.

RESULTSIn the mediastinum, no significant differences of CTPs were found between malignant and benign groups (all P>0.05), the same for subgroups of malignant nodes (all P>0.05). Acute lymphadenitis had higher BF and BV than chronic inflammatory, lymphoid tuberculosis, sarcoidosis and malignant nodes. The BF of malignant nodes was markedly slower than that of acute lymphadenitis (P=0.01), but faster than chronic inflammatory nodes (P=0.04) and sarcoidosis (P=0.03), with no significant difference compared with lymphoid tuberculosis. Pneumonia-complicated lymphoid tuberculosis showed the longest MTT while sarcoidosis displayed the shortest MTT, and inflammatory nodes, lymphoid tuberculosis without complicated pneumonia and malignant nodes had moderate MTT.

CONCLUSIONCTPs show promising potential in distinguishing various lymphadenopathies in the mediastinum, but more studies are needed to improve their specificity.

Adult ; Female ; Humans ; Lymph Nodes ; diagnostic imaging ; Lymphatic Diseases ; diagnostic imaging ; Male ; Mediastinal Diseases ; diagnostic imaging ; Perfusion ; Retrospective Studies ; Tomography, X-Ray Computed ; methods

Combined Modality Therapy ; High-Frequency Ventilation ; methods ; Humans ; Infant, Newborn ; Nitric Oxide ; administration & dosage ; Persistent Fetal Circulation Syndrome ; drug therapy ; Pulmonary Surfactants ; administration & dosage

Objective To study and compare the effects of Fentanyl transdermal pain patches and Pethidine in postoperative analgesia of malignant tumor and its nursing methods.Methods 100 patients with malignant tumor in our hospital from January 2008 to November 2010 were selected as research object,all the patients were randomly divided into group A (Fentanyl transdermal pain patches group) and group B (Pethidine group)with 50 cases in each group,then the VAS score 2,4,8,24 and 48h after the surgery,incidence of adverse reactions,satisfaction rate and serum catecholamine,cortisol,blood glucose before and after the surgery were analyzed and compared,and all the patients were given corresponding nursing measures.Results The VAS score of group A at 2,4,8,24 and 48h after the surgery were all better than those of group B,incidence of adverse reactions was lower than that of group B,satisfaction rate was higher than that of group B,serum catecholamine,cortisol,blood glucose after the surgery were all lower than those of group B,there were significant differences.Conclusions The effects of Fentanyl transdermal pain patches in postoperative analgesia of malignant tumor is stable,and it gets good reputation from the patients,the effects is obvious combined with nursing.

Objective: The dynamic turbidimetry Limulus test was used to assay endotoxin content in Chuan Hu Ning injection. Methods: When the standardized endotoxin added in Chuan Hu Ning injection sample (Lot.No.000409) and in its 40-fold dilution, 80-fold dilution, 120-fold dilution and 200-fold dilution , the recovery was 0 %, 21.18 %, 76.69 %, 101.1 %and 117.8 %and as the standardized endotoxin added in the three batches of 200-fold dilution of Chuan Hu Ning injection (Lot.No.000408?000409?001023), the recovery was 110.5 %, 124.4 %and 87.98 %. Results: As standardized endotoxin concentration being 5.00, 0.500, 0.0500Eu/mL , the 200-fold dilution of Chuan Hu Ning injection is effective to eliminate the interference in the test. Conclusion: The dynamic turbidimetry Limulus test provides a new way for the determination of endotoxin in Chuan Hu Ning injection.

Objective To establish the quantitative detection of capsule associated protein 10 (CAP10)and virulence-associated DEAD-box RNA helicase 1(VAD1)genes in Cryptococcus neoformans (CN) and compare the diagnostic values of single gene test and combined gene test in CN meningitis.MethodsTwenty-three CN meningitis patients with fungal culture or ink staining or CN antigen detection positive in cerebrospinal fluid (CSF) were recruited and patients with craniocerebral trauma were recruited as controls.Standard plasmids were constructed using standard CN strain.Real time fluorescent quantitative polymerase chain reaction (RT-FQ-PCR) was established to detect the mRNA expressions of CAP10 and VAD1 genes in the CSF of patients with CN meningitis,which were compared with the results of CSF ink staining,fungal culture and antigen detection.The diagnostic values of single gene test and combined gene test were compared by chi square test.Results Among 23 CN meningitis patients,22 (95.6％) were CAP10 mRNA positive detected by RT-FQ-PCR,which was significantly higher than both ink staining (16/23,69.6％,x2 =4.167,P＜0.05) and fungal culture (15/23,65.2％,x2=5.143,P＜0.05),respectively; but not significant different from antigen detection (21/23,91.3％,x2=0.500,P＞0.05).There were also no statistical significant differences between combined detection of CAP 10 + VAD1 and CAP 10 or VAD1 single gene test (P＞0.05).ConclusionRT-FQ-PCR detection is successfully established using virulence genes as target,which is superior to the conventional methods.

Objective To investigate the effects of L-glutamine-supplemented parenteral nutritional sup- port on nutritional status, immunity, and inflammatory response in patients with lung cancer following radical opera- tion. Methods Forty-two malnourished patients with lung malignancies who had undergone radical operations were randomly divided into PN plus group (n =22) and PN group (n = 20). From day 1 to day 5 after operations, parenteral nutrients with the non-proteinic calorfic value of 90 kJ · kg-1 d-1 and nitrogen 0.25 g · kg-1 d-1 were given. From day 2, liquid diets were provided to both groups, and L-glutamine particles (30 g) were provided to PN plus group. Peripheral blood specimens were collected before operation, on day 1, and on day 7 after the oper- ations to determine the serum levels of albumin, prealbumin, transferrin, T lymphocyte subgroup 3 (CD3), CD4, CD8, CD4/CD8, immunoglobulin A (IgA), IgG, IgM, and C-reactive protein. Results The levels of the serum transferrin [(2.29±0.34) vs. (2.15±0.42) g/L], prealbumin [ (0. 27±0.76) vs. (0.23±0. 84) g/L], CD4 (30.9%±2.2% vs. 28.9%±2. 3% ), CD4/CD8 (1.17±0.19 vs. 1.10±0. 81), IgG [(12. 94 2.08) vs. (11. 19±1. 95) g/L] were all significantly higher in the PN plus group than those in PN group on day 7 (P <0. 05) . The level of serum C-reactive protein was significantly lower in PN plus group than that in PN group on day 7 [(31.6±16.7) vs. (36.5±13.3) mg/L, P<0.05]. Conclusion Postoperative L-glutamine-supplemented parenteral nutrition support can improve the nutritional status and immune function and reduce the acute inflammatory response in patients with lung cancer.

Objective To investigate the expressions of NBS1 mRNA and protein in the salivary gland of irradiated rats and explore the role of NBS1 in the repair of radiation injury of salivary gland epithelial cells.Methods Eighty rats were randomly divided into two groups for radiation and control (n =40 each).The rats were fractionally exposed to 3 Gy of 60Co γ-rays once in two days,leading to an accumulation dose of 3,6,9,12,15 Gy.The sham-irradiated controls were anesthetized in parallel but without irradiation.After 2-4 h of irradiation,the rats were sacrificed,IHC and RT-PCR were used to detect the expressions of NBS1 protein and mRNA in parotid and submandibular glands,and the ultra-structural changes in the glands were observed by a transmission electron microscopy.Results After irradiation,the salivary glands became atrophy and the parotid gland cells were damaged more serious than the submandibular gland cells.Compared with the controls,with the groups of dose,at 9,12,15 Gy in parotid gland (t =7.10,17.93,20.86,P ＜ 0.05),at 12,15 Gy in the submandibular gland (t =3.13,7.53,P ＜0.05),the expression of NBS1 mRNA was reduced.With the groups of dose at 9,12,15 Gy in paretid gland (t =4.29,17.91,91.29,P ＜ 0.05 ),the dose at 12,15 Gy in submandibular gland ( t =4.61,11.84,P＜0.05),the expression of NBS1 protein in serous cells,and the dose at 12,15 Gy in parotid gland ductal epithelial cell ( t =3.09,5.62,P ＜ 0.05) were reduced.But in the ductal epithelial cells as well as muoass cells in the submandibualr gland were steadily.Conclusions After irradiation,NBS1 at both protein and mRNA levels was dropped in the salivary gland of rats,which might contribute to the repair of radiation injury of salivary gland.

Cubic and conductive teaching pattern is based on standardized operation process of microbiological specimens. It uses multi-dimensional teaching methods including tests, question guid-ance, discussion, lectures, measurements and scientific researches to lead the undergraduate students to master the standardized inspection process and to train talents with good gifts and abilities in prac-tical application. The teaching pattern helps the trainees complete training in basic experiment skills, analysis and problem solving skills, scientific thinking and working methods. Then the corresponding practical quantification evaluation criteria has been established according to the standardized inspec-tion process to assess the interns' level of grasping various vocational skills and comprehensive appli-cation in the inspection process. This pattern reflects the teaching philosophy of modern laboratory medicine and can scientifically and objectively assess the talent cultivation quality and teaching quality. Since its implementation, these trainees have improved their overall vocational abilities, and made a good preparation for their practical work after school. Besides, it has enhanced the teaching level of microbiology laboratory practice and has been highly valued by interns. It is hoped that this practical experience will be a useful attempt to promote medical education development of modern laboratory medicine.

BACKGROUND:Human periodontal ligament stem cels are a kind of mesenchymal stem cels that have self-renewal and multidifferentiation potential. Previous studies have showed that human periodontal ligament stem cels can differentiate into osteoblast-like cels or adipocyte-like cels under appropriate induction. Yet few studies have focused on the expression level of parathyroid hormone 1 receptor which wil affect the osteogenic potential of Human periodontal ligament stem cels. OBJECTIVE:To examine the expression level of parathyroid hormone 1 receptor between human periodontal ligament stem cels and human periodontal ligament cels and to discuss the role of parathyroid hormone 1 receptor in osteogenic differentiation. METHODS:By using magnetic-bead cel sorting, we separated and identified the human periodontal ligament stem cels and human periodontal ligament cels. We examined and compared the mRNA expression level of parathyroid hormone 1 receptor in human periodontal ligament stem cels and human periodontal ligament cels by Real-Time PCR. Osteoblastic differentiation was examined throughin vitro matrix mineralization by alizarin red staining and alkaline phosphatase assay. RESULTS AND CONCLUSION: Positive immunomagetic sorted cels were positive for STRO-1, CD146, Vimentin, indicating that they were periodontal ligament stem cels. Parathyroid hormone 1 receptor was expressed in human periodontal ligament stem cels and mainly located in cel membrane and cytoplasm which were similar to human periodontal ligament cels and MG63 cels. The expression of parathyroid hormone 1 receptor in human periodontal ligament stem cels was 3.7 times higher than that in human periodontal ligament cels, which was similar to that in MG63 cels. After osteogenic induction, human periodontal ligament stem cels showed a higher expression of parathyroid hormone 1 receptor and osteoblast-related genes as wel as the activity of osteoblast alkaline phosphatase and mineralization compared to human periodontal ligament cels. Our data showed that parathyroid hormone 1 receptor was higher in human periodontal ligament stem cels than human periodontal ligament cels and the expression was related with osteogenic differentiation, suggesting that human periodontal ligament stem cels display a higher potency of osteogenic differentiation and act as seed cels with a vast application prospect in oral tissue engineering.

[Summary] A total of 215 pregnant women at mid-gestation were enrolled, and their serum 25-hydroxyvitamin D levels were measured. Of them, 38 (17. 7%) were classified as cases with vitamin D sufficiency, 70 (32. 5%) as insufficiency, and 107 (49. 8%) as deficiency. Compared with the sufficient group, parathyroid hormone level increased and osteocalcin level decreased significantly in the deficient group. Therefore, vitamin D deficiency is highly prevalent among pregnant women and is associated with their potential disorder of bone turnover.