Abstract
The skin barrier function is an important predictor of neonatal barrier defects. This study aimed to investigate the daily changes in skin barrier function and the impact of bathing on skin barrier function in neonates. We assessed the transepidermal water loss (TEWL) and stratum corneum hydration (SCH) on the forehead, cheek, volar forearm, and chest from days 2 to 7 and at 1 month after birth. Additionally, we measured the values after bathing and compared them with the pre-bathing values. Sixty-six neonates were involved in the assessment, and each value at the four sites showed significant correlations. TEWL remained stable between days 2 and 7, but SCH significantly increased at most sites. Both significantly increased by 1.5-2 times in 1 month. After bathing, TEWL increased by more than 20% but decreased again after 3 h. TEWL did not change significantly with age during the first week of life. To minimize the effects of bathing, TEWL should be measured at least 3 h after bathing.
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