Reviewing the theory of chaos in the field of nonlinear dynamics, this paper summarized theory of chaos and its applications in medical signal processing including electroencephalogram(EEG) signal?electrocardiogram(ECG) signal?electromyogram(EMG) signal, etc. The foreground is reviewed to advance the study and application of nonlinear dynamics theory in biomedical engineering.

BACKGROUND: Studies have shown that Maca can enhance immune cel function, improve mitochondrial respiratory chain enzymes, and play a role in anti-oxidation and anti-aging.
OBJECTIVE: To observe Maca effects on kidney mitochondrial respiratory function and anti-aging capabilities in elderly rats after exhausted exercise.
METHODS: 10-month-old elderly rats were intragastrical y administrated Maca powder 5 g/kg, once a day, and did treadmil exercise, 5 days in a week. Rats were randomly divided into control group, Maca group and training group and Maca+training group. At 6 weeks after training, rats in each group did exhausted exercise (35 m/min), and immediately received intraperitoneal injection of 2% sodium pentobarbital. The kidney was obtained, and mitochondria were extracted by differential centrifugation. A spectrophotometer was used to measure mitochondrial respiratory chain activity.
RESULTS AND CONCLUSION: (1) Mitochondrial respiratory chain enzyme and antioxidant enzyme activity: mitochondrial respiratory chain enzyme I-III, superoxide dismutase and glutathione peroxidase activities were higher in the Maca+training group than in the control group, Maca group and training group (P < 0.05 or P < 0.01), but malondialdehyde content was lower (P < 0.05 or P < 0.01). (2) Results suggested that the combination of supplement Maca and incremental exercise can improve mitochondrial respiratory function and delay aging in the kidney of aged rats after exhausted exercise. Moreover, supplemented Maca and incremental exercise have a synergistic effect.

The characteristics of medical and health literature novel assessment in institutions of armed forces were described from the secrecy of projects for literature novelty assessment , the limitations of consignee institution , and the non-profitability of literature novelty assessment agency .The major problems of medical and health literature novel assessment in institutions of armed forces were elaborated in terms of the literacy, instability, competency and knowledge limitation of literature novel assessment staff with suggestions put forward for their solution such as strengthening the construction of talent team, joint development and sharing of resources.

Objective To compare the effects of vasopressin and adrenaline on cerebral resuscitation in rats. Method Sixty male SD rats were used to set the animal model of cardiac arrest and were randomly (random number) divided into 4 groups (n = 15/group): sham operation group (sham-gro), negative control group (neg-gro), vasopressin group (vas-gro) and adrenaline group (adr-gro). Blood pressure was recorded, and brain tissue samples were obtained. Results There was no significant difference in the recovery rate between vas-gro and adr-gro 30 min after resuscitation (P ＜0.05). The mean blood pressure in vasgro was higher than that in adr-gro within 30 min (1,2, 5, 10, 20, 30 min) after restoration of spontaneous circulation. The measured MDA, SOD and GSH were significantly different (P ＜ 0.05) between each two groups among vas-gro, sham-gro and adr-gro. Conclusions The recovery rate was similar between vasopressin group and adrenaline group during cardiopulmonary resuscitation in rats. However, vasopressin can to maintain the mean arterial pressure at a higher level after resuscitation, which can the increase the cerebral perfusion and reduce brain cell damage.

Objective To explore the effects of estrogen,sport walking with weight and estrogen plus sport walk on serum lipid,bone metabolism and bone mineral density(BMD) in postmenopausal women.Methods 52 postmenopausal women were divided into the hormone replacement therapy(HRT) group(n=12),sport walking with weight group(Sp group,n=14),HRT + Sp group(n=12) and control group(n=14).HRT group took compound nylestriol,Sp group took sport walking with 5 kg weight and exercise intensity was from 60% to 80% VO2max,HRT+Sp group received two treatments as HRT group and Sp group.The experimental duration consisted of six months.Results The total cholesterol(TC),TC/high density lipoprotein cholesterol(HDL-C),alkaline phosphatase(APL) and urine calcium(Ca)/creatinine(Cr) were markedly lower in three experimental groups than the control group and before experiment(P<0.05 or P<0.01),HDL-C in Sp and HRT+Sp groups were markedly higher than the control group and before experiment(P<0.05),BMD of spine(L2～L4) and left trochanter in three experimental groups were markedly higher than the control group(P<0.01) and before experiment(P<0.0).Conclusion Both estrogen replacement therapy and sport walking with weight effectively improve serum lipid,prevent and reverse osteoporosis induced by menopause in women.

Endometrial Neoplasms ; classification ; epidemiology ; mortality ; pathology ; Female ; Humans ; Uterine Cervical Neoplasms ; classification ; epidemiology ; mortality ; pathology

Objective To examine the influence of inra-articular injection of tranexamic acid on blood loss after total knee replacement. Methods 50 patients with unilateral primary total knee replacement were enrolled and they were randomly divided into two groups:the stud-y group (n=25 cases),which were given intra-articular injection of tranexamic acid (1 000 mg) and drain clamping for 2 hour posteratively, and the control group ( n=25 cases) ,which were given physiologic saline. The blood loss,postoperative volume of drainage,hemoglobin lev-el,hematocrit,blood transfusion cases,D-dimer level and deep venous tromboemblic ( DVT) events were recorded. Results Postoperative volume of drainage,blood transfusion cases and D-dimer level were lower in the study group (P<0. 05). Hemoglobin level and hematocrit were higher in the study group (P<0. 05). No DVT ocurred in the two groups. Conclusion Intra-articular injection of tranexamic acid with 2 hours of drain-clamping is effective for reducing postoperative blood loss in total knee replacement, and there is noincrease of deep venous tromboemblic.

Objective To discuss the comparability and bias evaluation on the results of serum creatine kinase (CK ) ,aspartate aminotransferase (AST) ,lactate dehydrogenase (LDH) inspection results between the two different kinds of biochemical analysis system .Methods The control quality materials with two concentration were detected respectively for degree of precision ,and the assessment standard was from manufacturer introductions and laboratory setting .Then in accordance with American Clinical and Laboratory Standard Institute(CLSI) document EP9‐A2 ,100 patients serum CK、AST、LDH were detected .Afterwards the relative bias(SE% ) was calculated ,and the comparative analysis bias evaluation was judged according to the half of CLIA′88 allowed total error .Results The variable coefficients mainly conformed to the requirements ,and the experimental results were reliable .The oth‐ers mainly lower than the acceptable limit besides SE% for LDH higher than it .Conclusion It is necessary to execute comparative analysis and bias evaluation to ensure the accuracy and comparability if the same item is detected in two analysis system .

Objective To explore the personality characteristics of patients with male climacteric syndrome and summarize the coping styles.Method 32 patients with male climacteric syndrome involved in the investigation of personality characteristics and coping styles by Eysenck Personality Questionnaire(EPQ).As a control,another 32 healthy subjects were enrolled for the controlled investigation.Results In the climacteric syndrome group,the scores on extraversion(E)was significantly lower than that of the control group,the scores on neuroticism(N)and lie(L)were significantly higher than the control group(P<0.01).In the climacteric syndrome group,the scores on active coping style was significantly lower than those of the control group and the scores on negative coping style score were significantly higher than those in the control group(P<0.01).Conclusions The patients with male climacteric syndrome is characterized with incomplete catharsis and emotional lability.They tend to suppress their negative emotions and take passive coping styles.

Thirty dogs were made into the experimental models of penetrating craniocerebral injury, and tangential brain and skull injuries, respectively. The shooting distance was 20 m. The indexes in physiology and roentgenology were observed, and the contents of spinal cord water, Evans blue dye, and sodium and potassium were estimated. Moreover, the pathological changes in spinal cord were examined. The results show that not only the brain itself but also the spinal cord could be damaged. So the injury of spinal cord should not be neglected in the treatment of the wound. The spinal cord injury may by related to the transmission of the bullet kinetic energy and the remote effect of shock waves.