The Accuracy of the Accelerometers (Actical and Actigraph) among Korean People

BACKGROUND: Nowadays, decreased physical activity is considered to be a contributor to increase the prevalence of many diseases such as obesity, coronary heart disease and so on. Many researches demonstrated that regular physical activity reduce all cause mortality. To increase the physical activities of the population, accurate estimation of the activities is needed. Actical and actigraph are confirmed as accurate tools to measure physical activities. But the target populations of the validity studies were not Asian people. Therefore, the accuracy of the accelerometers should be confirmed in Asian people. The accuracy of the tools could be different. Therefore head to head comparison study between the tools would be needed. METHODS: Thirty volunteers from the community, ages over 20 yrs, were recruited. The participants put on the two accelerometers (Actical, Actigraph) on the waists, secured with elastic belts, and performed a session of rest and three structured activities (two walking speeds, 4 km/hr and 6 km/hr, and one jogging speed, 8 km/hr). During each activity, expired respiratory gases were collected, and oxygen consumption (VO2) was measured by indirect calorimetry (Model Quark beta2(R)). The calories measured by gas analyzer and two accelerometers were compared by correlation analysis using SPSS program. RESULTS: Pearson correlation coefficient between gas analyzer and two accelerometers was calculated at three structured activities. The r in Actical was 0.747, 0.785, and 0.677, at speed of 4, 6, 8 km/hr, respectively (P<0.05), and the same measures in Actigraph was 0.617, 0.737, and 0.530 (P<0.05), respectively. Pearson correlation coefficient was also calculated between the two accelerometers, and the r was 0.881, 0.927, and 0.824, at each speed. CONCLUSION: The Actical and Actigraph are valid tools for measuring physical activities in Korean people.

A Case of Pneumocele in the Ethmoid Sinus / 대한이비인후과학회지

Pneumocele is the pathologic expansion of an air-containing paranasal sinus that causes thinning of the bony sinus walls and displacement of nearby structures. This abnormality probably results from a physiological block in the rapid equilibration of intrasinus air pressure through the major sinus ostium and as a result of some abnormality producing a one-way valvular mechanism. A 41-year-old man had complained of headache, diplopia and periorbital pain on left side which aggravated after nose blowing. A computed tomographic scan showed a hyperlucent, expanded left ethmoid sinus. We treated the condition by endoscopic marsupialization of the anterior ethmoid sinus. Six months later, headache and periorbital pain have subsided, but diplopia has remained.

Endoscopic Surgery for Inverted Papilloma / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Inverted papilloma is charicterized by a high rate of recurrence, local aggresiveness and occasional association with malignancy. Most authors have recommended medial maxillectomy as the initial surgical approach. Howerer, conservative surgery has been reported to be effective in selective cases. MATERIAL AND METHODS: Six patients were treated by intranasal endoscopic exicision from 1993 to through 1995. Among the six patients, 3 patients with maxillary sinus involvement were treated with Denker operation or Caldwell-Luc operation combined with endoscopic endonasal surgery. RESULT: Two patients were found to have malignancy ssociated with inverted papilloma. There is no evidence of recurrence at the present time. CONCLUSION: This study shows the possibility of endoscopic surgery as an initial approach for inverted papilloma.

A prevalence study of otitis media and related diseases in Korea in 1991 / 대한이비인후과학회지

No abstract available.