Non-contact vital sign detection technique provides an effective usage in health monitoring applications. A vital sign detector was designed based on microwave bio-radar technique. Using Doppler principle, continuous wave bioradar was designed for tiny body movement detection, short-time Fourier transform and interpolation algorithm were adopted for heart and respiration rate extraction, embedded system was used for system integration, real-time signal processing software was designed on it. Experiments were done by using simulation device and human body for research and performance evaluation. The result shows that the proposed prototype can be used for single target vital signs detection at the distance of 90 cm, and the heart rate result shows a 96% recognition rate.
Equipment Design ; Humans ; Physical Examination ; instrumentation ; methods ; Radar ; Vital Signs

Objective To evaluate the impact of mesoreetal margin micrometastasis on local recurrence of rectal carcinoma after total mesorectal excision, and the relation between mesorectal margin mierometastasis and local recurrence. Methods Mesorectal margin specimens from 52 cases of rectal cancer after total mesorectal excision were studied by reverse transcriptase-polymerse chain reaction (RT-PCR) to detect the expression of CK20 mRNA. These patients were divided into CK20 mRNA positive and negative group and followed up for 3 years until local recurrence developed. Results In 52 patients with rectal cancer,21 cases were found to express CK20 mRNA in mesorectal margin, the expression rate of CK20 mRNA in Dukes A,B and C was 17% ,30% and 54% (P<0.05), respectively. The positive rate of well differentiated, moderately differentiated, poorly differentiated and undifferentiated carcinomas were 43%, 38% ,40% and 50% ,respectively(P>0.05 ). The incidence of local recurrence in CK20 mRNA positive and negative group was 24% and 3% , respectively. The difference was statistically significant between the two groups (P <0.05 ). Conclusion Detection of mesorectal margin CK20 mRNA as micrometastasis by RT-PCR in rectal carcinoma patients was a sensitive and effective way in predicting local recurrence. It is necessary for patients with positive mesorectal margin CK20 mRNA to undergo postoperative radiotherapy after total mesorectal excision.

Objective To evaluate the ability of the artificial pneumothorax CT examination in detection and diagnosis of pleural metastatic tumor.Methods A retrospective study of 14 patients with pleural effusion using artificial pneumothorax CT examination was conducted.Results Six of the 14 patients were found to have a nodule or nodules on the pleura.The pleural metastatic tumors of 3 cases were from the lung cancers and another 3 from breast cancers were proved histologically.Conclusion The artificial pneumothorax CT examination is a effective and simple method in detecting of pleural metastatic tumor.

Objective To analyze the imaging manifestations of chondromyxoid fibroma,so as to improve diagnostic accuracy.Methods The X-ray,CT and MRI manifestations of 8 cases with chondromyxoid fibroma confirmed by surgical pathology were analyzed retrospectively.Results All of 8 cases were in the long tubular bones.X-ray showed oval,well defined,eccentric,radiolucent lesion with surrounding sclerosis.The thick dense bony or coarse reticular septation were seen in 6 cases.CT scan showed osteolytic,surrounding sclerosis,and 1 case with foci of calcification.MRI images showed a low or medium signal on T1WI,high signal on T2WI,1 case with a equal T1WI and slight high T2WI signal intensity peripheral rim around.Two cases with diffused enhancement on T1WI after intravenous injection of gapentetate acid meglumine injection and a peripheral liner enhancement in 1 case.Conclusion Chondromyxoid fibroma has certain imaging characteristics,but should be combined with X-ray,CT and MRI to differentiate from other bone tumors with similar imaging manifestations.

The palliative care has become an important part of social civilization. Its treatment of advanced patients with no response to the treatment of patients with positive and comprehensive care, paying attention to the people-oriented conforms to the Chinese nationHeperfectly. In palliative care practice,Heconcept penetrates in the happening of the disease and development, treatment and special and complex and changeful in interpersonal relationship. The ultimate goal of He is also a palliative care. The concept of reconciliation will promote the development of palliative care.

Background and purpose:The clinical relevance of HBV infection with respect to diffuse large B cell lymphoma(DLBCL) patients and immune patterns of T lymphocyte subsets during chemotherapy remains unclear. This study aimed to identify the characteristics of T-cell mediated immunity in DLBCL patients with HBV infection, thereafter, to explore the possible cell-mediated immune mechanisms of HBsAg positive HBV infection on the survival of DLBCL. Methods:A total of 294 newly diagnosed DLBCL patients were enrolled in this cohort study. Four-color flow cytometric method was used to enumerate the absolute number of CD3+, CD4+, CD8+T lymphocytes and the CD4+/CD8+ratio in peripheral blood samples, at the onset of disease, 2-4, 4-6 and 6-12 months after the initiation of chemotherapy, individually. Results:The absolute number of CD3+, CD4+, CD8+T lymphocytes in both groups were similar at the onset of disease;the count of CD4+lymphocytes was lower in HBsAg positive group during 2 to 4 months after the initiation of chemotherapy, compared with that in the HBsAg negative group. During 4 to 12 months after chemotherapy, the CD4+/CD8+ratio in peripheral blood samples was significantly lower in HBsAg positive group. Conclusion:For newly diagnosed DLBCL patients who received chemotherapy, the dynamic nature of cell mediated immune response was characterized as a low counts of CD4+T lymphocyte during the ifrst several cycles of chemother-apy followed by a decreased circulating CD4+/CD8+ratio. Depressions of cell immunity after chemotherapy in HBsAg positive DLBCL patients were greater and prolonged.

AIM: To investigate the effect and the mechanism of apolipoprotein (a) [apo (a) ] on proliferation of vascular smooth muscle cells ( VSMCs). METHODS: All VSMCs used in experiments were serial subcultured from primary cells and were identified by immunohistochemistry staining of a - actin. Cell growth assay was observed as cell counting and MTT assay. Western blotting was also employed to detect the related mechanism. RESULTS: All cells used in experiments were confirmed as VSMCs. Although apo (a) enhanced VSMCs proliferation, this effect was attenuated by anti -integrin α_vβ_3, LM609.Use these reagents alone had no effect on VSMCs growth. The results of Western blotting demonstrated that focal adhesion kinase (FAK) was activated by apo (a) and the expression of total or phosphorylated transforming growth factor β_1 (TGF -β_1) was also decreased. However, these effects described above were all blocked by LM609.CONCLUSION: Apolipoprotein (a) enhances VSMCs proliferation and this effect is mediated by integrin α_vβ_3, which activates FAK and attenuates TGF - β_1 and phospho -TGF - β_1 expression.

Objective To isolate and purify Thy 1 low Lin Sca 1 + bone marrow stem subset cells by magnetic activated cell sorting(MACS). Methods Thy 1 low Lin Sca 1 + cells from mouse bone marrow were collected through three processes by MACS.After Lin + cells were removed,Thy 1 low Lin Sca 1 + bone marrow stem cell subsets were harvasted.The purity of the cells was analysed by FACS and the reclaimation rate was counted. Results The purity and reclaimation rate of Thy 1 low Lin Sca 1 + cells were 72.36% and 82.43% respectively, which equaled to the level of isolation and purification of CD34 + cells by MACS. Conclusions It is effective to isolate and purify Thy 1 low Lin Sca 1 + bone marrow stem cell subsets by MACS, and the purity and reclaimation rate of the cells are high.

Objective: To compare the antioxidant capacity of 66 vegetables and fruits. Methods: The ferric reducing/antioxidant power assay was used to measure the antioxidant capacity. The contribution of vitamin C contained in vegetables and fruits to the antioxidant capacity was also analyzed. Results: The lotus root was the strongest in antioxidant capacity among all vegetables and followed by ginger, rape, cowpea, taro, garlic bulb and spinach. The celery, yam and romaine lettuce were the weakest. The hawthorn was the strongest in antioxidant capacity among all fruits and followed by winter date, guava, kiwifruit, purple mulberry, strawberry and agate pomegranate. The honeydew melon, watermelon and persimmon were the weakest. The contribution of vitamin C to the antioxidant capacity of vegetables and fruits differed greatly among different vegetables and fruits. Conclusion: Some vegetables and fruits possess strong antioxidant capacity and were worthy of further studies.