To evaluate whether Hong Kong primary schoolchildren could be taught to perform compressiononly CPR. Design: Prospective experimental trial Subjects: Primary schoolchildren of age 9-12 years old from different Cub Scout packs attended a 2 hour voluntary compression-only CPR training session between late 2014 and mid-2015. Main outcome measures: Cardiopulmonary resuscitation (CPR) knowledge in the format of pre-and post-test multiple choices questions (MCQ). Psychomotor skills assessment including correct hand position, compression depth, compression rate and chest wall recoil between each compression. Results: A total of 112 primary schoolchildren attended the training session, in them 72% were boys. Pretest score and post-test score was 2.81/5 and 4.82/5, respectively. The difference was statistically significant (p<0.05). About 96% of subjects had correct hand position at all time during CPR. Mean compression rate was 119/minute. Mean compression depth was 3 cm. About 47% of subjects had 100% complete recoil of chest wall following compression. Conclusion: Primary schoolchildren above 9 years old are able to acquire essential knowledge and skills in compression-only CPR. Their physical strength may limit their ability to perform effective chest compression; it is still worthwhile to advocate CO-CPR education in primary schoolchildren in Hong Kong in order to raise their interest in this life saving skills and to equip them with essential cognitive skills in emergency situations. To achieve optimal cost-effectiveness and a compression depth of at least 4 cm, body weight of 53 kg or above should be considered as a selection criterion.
Background and objectives: Leptospirosis is a zoonotic infection with worldwide distribution caused by the Leptospira species and predominant in the tropical and subtropical regions. Information on leptospirosis in Bangladesh is limited. The present study was designed to detect anti-leptospiral antibodies in human serum samples in Bangladeshi population by developing an in-house ELISA using recombinant LipL32 (rLipL32) antigen. The study was conducted from April 2014 to December 2014.Method: Healthy individuals from two rural areas and fever cases from one urban healthcare center were enrolled in the study. Rural health centers were located at Sonargoan and Bajitpur sub-district (Upozilla) of Narayaganj and Kishorganj districts. Sonargoan health center is located 26 km south-east and Bajitpur is located 71 km north-east of Dhaka city. About 1-2 ml of blood was collected with aseptic measure and serum was separated and stored at -200C until used. Anti-leptospiral IgG antibody was determined by recombinant LipL32 (rLipL32) antigen based indirect enzyme linked immunosorbent assay (ELISA). Seropositive cases were further confirmed by commercial Leptospira IgG ELISA.Results: The study included 250 febrile cases and 376 healthy individuals from urban and rural areas, respectively. Out of total 626 study population, anti-LipL32 specific IgG antibody was detected in 70 individuals (11.2%). The rate of positivity of anti-LipL32 antibody among the healthy individuals from rural area was 10.6% while the rate was 12.0% in urban febrile population. The rate of positivity in rural and urban population was not significantly (p>0.05) different. Among the urban population, the rate of seropositivity was 9.1% and 16.4% in 21- 40 yrs and above 40 years age group respectively while the rate was 7.2% and 14.0% in rural population respectively. Out of 70 seropositive cases detected by LipL32 ELISA, 65 (92.9%) were positive by commercial ELISA.Conclusion: The present study has revealed that leptospirosis is prevalent in Bangladesh and should be looked for in febrile and clinically suspected cases. The study has also demonstrated that rLipL32 protein may be used as a candidate antigen for the serodiagnosis of leptospirosis.IMC J Med Sci 2017; 11(2): 50-55
Mechanical strength of phenylenebenzobisoxazole (PBO) fibers and cross-linked polyethylene (XLPE) matrix composites were studied with particular interest on the effects of oxygen cold plasma-treated fibers. PBO fibers were treated in a radio frequency plasma reactor using oxygen for different treatment times to increase the interface adhesion. Tensile tests on PBO fibers showed that plasma treatment caused an increase in average tensile strength compared with untreated fibers. Fracture analysis confirmed the increase in interfacial adhesion due to oxygen plasma treatment.
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