Research and Development Trend of Medical Oxygen Production Equipment / 中国医疗器械杂志

Oxygen therapy is an effective clinical method for the treatment of respiratory disorders, oxygen concentrator as a necessary medical auxiliary equipment in hospitals, its research and development has been a hot spot. The study reviewed the development history of the ventilator, introduced the two preparation technique of the oxygen generator pressure swing absorption (PSA) and vacuum pressure swing adsorption (VPSA), and analyzed the core technology development of the oxygen generator. In addition, the study compared some major brands of oxygen concentrators on the market and prospected the development trend of oxygen concentrators.

Development of a Wireless Wearable Body Temperature Measurement System Based on NTC / 中国医疗器械杂志

Body temperature is an important physiological parameter of the human body and is used in medicine to reflect the physiological state and health status of the human body. At present, the commonly used clinical thermometers on the market are mainly divided into contact and non-contact types. Most of them are used for rapid body temperature measurement, and it is not easy to monitor body temperature changes in real time. This article introduces a new wearable wireless body temperature monitoring system based on NTC, which senses through NTC. The temperature changes are amplified and filtered, zeroed, and calibrated, and then the temperature data is uploaded to the mobile phone APP via Bluetooth in real time to achieve real-time accurate measurement of body temperature.

Infrared Sensor ZTP-135SR and Its Application in Infrared Body Temperature Measurement / 中国医疗器械杂志

Body temperature is an essential physiological parameter. Conducting non-contact, fast and accurate measurement of temperature is increasing important under the background of COVID-19. The study introduces an infrared temperature measurement system based on the thermopile infrared temperature sensor ZTP-135SR. Extracting original temperature date of sensor, post-amplification and filter processing have been performed to ensure accuracy of the system. In addition, the temperature data of environmental compensation which obtained by polynomial fitting is added to the system to further improve measurement accuracy.

An anesthesia depth computing method study based on wavelet transform and artificial neural network / 生物医学工程学杂志

General anesthesia is an essential part of surgery to ensure the safety of patients. Electroencephalogram (EEG) has been widely used in anesthesia depth monitoring for abundant information and the ability of reflecting the brain activity. The paper proposes a method which combines wavelet transform and artificial neural network (ANN) to assess the depth of anesthesia. Discrete wavelet transform was used to decompose the EEG signal, and the approximation coefficients and detail coefficients were used to calculate the 9 characteristic parameters. Kruskal-Wallis statistical test was made to these characteristic parameters, and the test showed that the parameters were statistically significant for the differences of the four levels of anesthesia: awake, light anesthesia, moderate anesthesia and deep anesthesia (

Association of Sugar-Sweetened Beverage Intake during Infancy with Dental Caries in 6-year-olds

To examine whether sugar-sweetened beverage (SSB) intake during infancy is associated with dental caries by age 6, a longitudinal analysis of 1,274 U.S. children was conducted using data from the 2005-2007 Infant Feeding Practices Study II and the 2012 Follow-up Study at 6 years of age. The exposure variables were maternal-reported SSB intakes during infancy (i.e., any SSB intake during infancy, age at SSB introduction during infancy, and average frequency of SSB intake during 10-12 months of age). The outcome variable was maternal-reported dental caries of their 6-year-old in his/her lifetime. Multivariable logistic regression analyses were used to calculate adjusted odds ratios (aOR) for associations of SSB intake during infancy with having dental caries among 6-year-olds after controlling for baseline characteristics of children and mothers and child's tooth brushing habits and sweet food intake at follow-up. Based on maternal recall, almost 40% of 6-year-olds had dental caries in their lifetime. Adjusted odds of having dental caries was significantly associated with higher frequency of SSB intake during 10-12 months (aOR=1.83 for > or =3 times/week, vs. none). Any SSB intake during infancy and age at SSB introduction during infancy were not associated with dental caries. In conclusion, frequent SSB intake during 10-12 months of age significantly increased the likelihood of having dental caries among 6-year-olds. Late infancy may be an important time for mothers to establish healthy beverage practices for their children. These findings can be used to inform efforts to reduce dental caries among children.

Risk factor study and analysis of recurrent cerebral infarction / 中国基层医药

Objective To explore the risk factors of recurrent cerebral infarction and the preventive meas-ures. Methods The risk factors were compared between recurrent group (246 cases with recurrent cerebral infarc-tion) and unrecurrent group( 100 cases with unreeurront cerebral infarction) by means of multiple logistic regression analysis. Results The recurrent cerebral infarction is correlated closely with hypertension, diabetes, heart diseases and excessive drinking, and the OR values arc 2.206, 2.232, 2.252, 2.842, 2.366 respectively (P<0.05), prophy-lactic treatment had the protective effects against the recurrent cerebral infarction,and the OR value was 0.249. Con-dusions The main risk factors of recurrent cerebral infarction were hypertension,heart diseases,excessive drinking. Prophylactic treatment hed great significance in preventing the recurrence of cerebral infarction.

STUDY OF RISK FACTORS OF INFANTILE RICKETS IN BEIJING URBAN DISTRICTS / 营养学报

In order to offer the theoretical basis of preventing and treating rickets as well as providing information on scientific feeding, a case-control study of 300 infants, less than 24 months of age diagnosed by multiple means was undertaken to investigate the risk factors of infantile rickets in Beijing urban districts. The results showed that the occurrence of infantile rickets was related to maternal vitamin D status during pregnancy, certain birth circumstance, insufficient sunlight exposure and unsuitable feedings. Thus,a concerted policy of systematic management involving early prevention and treatment should be emphasized.