The purpose of this paper is to study the pattern of change which are age associated,so as to provide a new method of age estimation by bone for forensic medicine and anthropology.The middle one third of right ribs were collected from 67 Chinese females living in North China.Decalcified cross section slides were histomorphometrically examined by using an image analyzer.Then the parameters were subjected to multiple stepwise regression analysis to produce an equation:=31 264+0 868X 2+286 693X 4+0 689 X 7-778 874X 8-0 006X 9.The multiple correlation coefficient and standard error of estimate were 0 923 and 4 08,respectively.When the formula was checked by 25 specimens,84% of the estimated ages fall within ?5 years of actual ages,and 100% of the estimated ages fall within ?8 years of actual ages.This showed that female ages could be deter mined by the histomorphometry of ribs.

Objective To develop a portable jet-flow device for preliminary debridement of wound mainly in battlefield,which can also be used for the treatment of nuclear or chemical weapon injury at wartime and peacetime.Methods The device was composed of a dynamic system,a servo system and consumable accessories,and developed based on a pneumaticpower scheme.Composite power unit free of dependence on electric power transferred the pneumatic power to three kinds of disinfectants through the four-way pipes.Results The device with easy operation consumed a few disinfectant and completed debridement within 30 minutes,with infection avoided effectively.Conclusion The device gains advantages in low weight,compact structure,function and low cost,and can be used for early debridement in field conditions.

Objective To explore the effect of scenario simulation teaching method in the training of cardiopulmonary resuscitation (CPR) for junior surgical residents. Methods 133 junior residents (working life<3 years) in the author's hospital rotating Cardiac Surgery department were selected and divided into control group (n=65) and observation group (n=68), in which the control group adopted traditional classroom teaching: teacher explanation-demonstration-student practice-teacher counseling; the observation group adopted scenario simulation teaching: teacher explanation-demonstration-student practice-teacher counseling scenario simulation. Before and after training, two groups both received the CPR theory and double operation assessment , comparing the difference of assessment scores between groups before and after training . Results There was no statistically significant difference in the demographic characteristics between the two groups. The assessment scores of CPR theory and operation were improved in both groups after training, and there were significant differences (P=0.000). There were no statistically significant differences in the CPR theory and operation assessment scores between the two groups before training (P>0.05);compared with the scores of CPR operation between the two groups after training, the observation group [(84.62±3.94)] was significantly higher than that of the control group [(79.68±5.45)] and there were significant statistical differences (P=0.000), while there was no statistically significant difference in CPR theory assessment scores between the two groups (P>0.05). Conclusions Both traditional classroom teaching and scenario simulation teaching methods could improve the CPR theory and skill level of the surgical junior resident, but situa tional simulation teaching method is better than traditional classroom teaching method in improving students' CPR performance.

Group 2 innate lymphoid cells (ILC2s) are the "mirror cells" of Th2 cells. Although the total cell number of ILC2s is far less than that of CD4⁺ Th2 cells in the body, the activated ILC2s have a more powerful biological activity than CD4⁺ Th2 cells and can rapidly enhanced Th2-cell inflammatory reaction. It plays an important role in the pathogenesis of allergic respiratory diseases. The transmitters that activate ILC2s include inflammatory cytokines (IL-33, IL-25, TSLP, IL-4, IL-9), lipid transmitters (prostaglandins, leukotrienes), and other activating transmitters (ICOS, Complement C3a, neuropeptide receptor, vasoactive intestinal peptide and calcitonin gene-related peptide, etc). Activated ILC2s produce large amounts of IL-4, IL-5, IL-9, IL-13, and amphiregulin and other inflammatory mediators, and induce airway hyperresponsiveness, mucus secretion and airway remodeling and other respiratory allergic reactions. Therefore, respiratory allergic diseases, especially steroid-dependent asthma, could be treated potentially by inhibiting the activation of ILC2s. Hereby, we summarized the immunobiology of ILC2s, the initiation of ILC2s in allergic inflammation, the relationship between ILC2s and respiratory allergic diseases, and the recent advances in biological agents targeted by ILC2s.
Humans ; Immunity, Innate ; Interleukin-4 ; Interleukin-9 ; Lymphocytes ; Hypersensitivity ; Cytokines ; Respiratory Tract Diseases ; Inflammation

The sternum is the pivotal component of the thoracic cavity. It is connected with the clavicle and ribs on the upper part and both sides respectively, and plays an important role in protecting the stability of the chest wall. Sternal resection usually results in a large segmental chest wall defect that causes the chest wall to float and requires sternal reconstruction. This paper reports a 62 years male patient with thymic squamous cell carcinoma with sternal metastasis, who underwent thymotomy, sternal tumor resection and autologous lilum graft combined with sternal reconstruction by titanium plate after relevant examination was completed and surgical contraindications were eliminated. The patient was followed up for 6 months, the respiratory and motor functions were normal and the thoracic appearance was good.