Citations
, Wookeun Lee, Tae-Dong Jeong, Hae-Sun Chung, Ki-Sook Hong Six sigma is a quality management system for the assessment of precision and accuracy. We aim to apply the six sigma rule to quality control (QC) of point-of-care (POC) glucose meters in a tertiary hospital.
Thirty POC glucose meters installed at Ewha Womans University Mokdong Hospital were monitored between January 2013 and March 2014. The QC data from the POC glucose meters at low and high levels were collected. The monthly mean, standard deviation, bias, coefficient of variation, and mean sigma metrics were calculated. The correlation between accuracy and precision was assessed based on the percentage bias and coefficient of variation. Comprehensive instructions on the QC and maintenance of the devices were provided in the departments with poor sigma scores. A follow-up assessment was performed after the intervention.
The mean sigma values for the low and high controls were 3.29 and 3.71, respectively. At the low and high controls, 36.6% and 10% of the glucose meters showed a sigma value <3. The causes of low sigma values included the use of expired control materials, prolonged air exposure of the sample strip, lack of user training, and errors in device maintenance. On follow-up monitoring for 3 months following QC intervention, 23.3% (low control) and 6.6% (high control) of the glucose meters scored a sigma value <3, indicating improved QC.
Sigma metrics-based QC can successfully improve accuracy and precision of POC glucose meters in an objective and quantitative manner and can be used for follow up after QC intervention.
Citations
To observe the neurobehavior of premature infants, Brazelton Neonatal Behavioral Assessment Scale was performed on 88 newborns, of gestational age 31 weeks to 40 weeks. The infants were devided into 5 groups according to gestational ages and means, standard deviation and correlation coefficient on 26 items of BNBAS were calculated.
High correlation between items and gestational age was observed in the dimension of social interactive process and only part of items in the state control was significantly correlated. The poorest correlation was found in the dimension of motoric interactive process.
Even though BNBAS is made for mature fullterm newborns, it can be used to evaluate the neurobehavior of premature infants with special consideration of prematurity It becomes clear that since neurobehavior of premature infants are unstable, inconsistent and generally poor in response to external stimuli, the relationship between the prematures and caretakers is likely to be less optimal than fullterms, which, in extreme case, can lead to child abuse, and which should be prevented by cooperation between the caretakers and medical personnels.
, Keun Lee Clinical estimation of gestational age at birth has been applied to 181 newborn infants who were born at Ewha Womans University Hospital from July to September 1979. Authors used neurologic examination based on evalution of passive tone, active tone and primary reflexes in order to estimate the gestational age, 1) Correlation coefficient between gestational age calculated from last menstrual period and clinical estimation of gestational age used in this study was 0.833 and regression formula was Y = 0.741+10.27. 2) There was no stastically significant difference in correlation coefficient between S.G.A, A.G.A., and I.G.A. groups. 3) Neurologic examination is objective and reproducible for estimation of gestational age in newborn infants.
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