| 수록사항 |
한국생활환경학회지 , v.11 n.4(2004-12) |
| 주제어 |
; Scrotal temperature ; ONDOL ; Floor heating ; Man fertility |
| 요약1 |
현재 우리나라의 불임인구는 약 10%내외로 근년에 증가하고 있는 추세이며 외국의 경우에도 정자의 수는 근년들어 급격히 줄어드는 것으로 조사되었다. 본 연구목적은 바닥의 온도에 따라 낭심이 어떻게 반응하는지 조사하고 허용가능한 바닥의 적정온도범위를 제시하기 위하여 수행되었다. |
| 요약2 |
Testicular temperature should be 2o~4oC lower than body core temperature for sperm production. Koreans live sitting on the ONDOL floor heating system in their residential buildings, consequently male testis is affected by floor surface temperature. The purpose of this study is to investigate the changes of scrotal temperature in a sedentary posture over the heated floor. Screening test had been performed to select the healthy subjects, and finally six college students volunteered in this experiment. They stayed in the preliminary chamber controlled 24oC for 20 minutes in order to get the testis of thermo-neutral state. Subjects moved to main experimental chamber in which floor surface temperature controlled by temperature of water (tw) flowing into the floor coil from 15o to 50oC at 5oC interval. Skin temperatures including 2 points of scrotum, left and right sides, were measured while subjects’ buttocks contact with floor surface for 50 minutes. The study revealed that the average floor surface temperature (tf) recorded as 17.0o (S.D 0.10) for tw 15oC, 20.8o (0.07) for tw 20oC, 24.1o (0.10) for tw 25oC, 27.8o (0.10) for tw 30oC, 31.7o (0.10) for tw 35oC, 35.9o (0.10) for tw 40oC, 38.6o (0.10) for tw 45oC, and 42.2o (0.10) for tw 50oC. The final temperature of scrotal surface was 32.27o, 32.62o, 33.51o, 33.34o, 34.14o, 34.28o, 34.34o and 35.04oC at the tf 17.0o, 20.8o, 24.1o, 27.8o, 31.7o, 35.9o, 38.6o and 42.2oC, respectively. At tf 17.0o and 20.8oC, the changes of scrotal temperature were shown declined pattern and low temperature for sperm reproduction. At tf 24.1o, 27.8o and 31.7oC, these environments were suitable for men fertility, and thermal regulatory system of scrotal muscle activated appropriately. At tw 35.9o, 38.6o and 42.2oC, results were shown ascended pattern. Of six subjects, two were shown that their scrotal temperature rose above 35oC at tf 38.6oC, and four were above 35oC at tf 42.2oC. The results suggested that optimum surface temperature of heated floor is 24o~32oC for men fertility. |
