{"id":62401,"date":"2025-12-16T12:30:08","date_gmt":"2025-12-16T20:30:08","guid":{"rendered":"https:\/\/vietvalley.com\/xoa-hinh-xam-bang-laser\/"},"modified":"2025-12-16T12:30:08","modified_gmt":"2025-12-16T20:30:08","slug":"xoa-hinh-xam-bang-laser","status":"publish","type":"post","link":"https:\/\/vietvalley.com\/en\/xoa-hinh-xam-bang-laser\/","title":{"rendered":"X\u00f3a h\u00ecnh x\u0103m b\u1eb1ng laser"},"content":{"rendered":"

Jessica Tr\u1ea7n c\u00f3 m\u1ed9t h\u00ecnh x\u0103m tr\u00ean c\u00e1nh tay, l\u00e0 m\u1ed9t k\u1ef7 ni\u1ec7m v\u1edbi ng\u01b0\u1eddi y\u00eau c\u0169 gi\u1edd l\u00e0\u2026 ng\u01b0\u1eddi xa l\u1ea1, n\u00ean c\u00f4 mu\u1ed1n x\u00f3a n\u00f3 \u0111i. \u201cTh\u1ea5y tr\u00ean Facebook qu\u1ea3ng c\u00e1o x\u00f3a h\u00ecnh x\u0103m b\u1eb1ng laser, ch\u1eb3ng bi\u1ebft c\u00f3 an to\u00e0n kh\u00f4ng,\u201d Jessica b\u0103n kho\u0103n.<\/span><\/p>\n

C\u00f3 l\u1ebd nhi\u1ec1u ng\u01b0\u1eddi t\u1eebng nghe nh\u1eefng c\u00e2u chuy\u1ec7n ho\u1eb7c tr\u1ef1c ti\u1ebfp tr\u1ea3i nghi\u1ec7m vi\u1ec7c c\u00f3 m\u1ed9t h\u00ecnh x\u0103m \u0111\u00e1ng ti\u1ebfc. Cho d\u00f9 \u0111\u00f3 l\u00e0 h\u1eadu qu\u1ea3 c\u1ee7a m\u1ed9t \u0111\u00eam say s\u1ec9n d\u1eabn \u0111\u1ebfn m\u1ed9t chuy\u1ebfn \u0111i b\u1ed1c \u0111\u1ed3ng \u0111\u1ebfn ti\u1ec7m x\u0103m, m\u1ed9t t\u00e1c ph\u1ea9m kh\u00f4ng c\u00f2n h\u1ee3p th\u1eddi ho\u1eb7c m\u1ed9t t\u00e1c ph\u1ea9m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n k\u00e9m, mong mu\u1ed1n x\u00f3a b\u1ecf m\u1ed9t v\u1ebft x\u0103m v\u0129nh vi\u1ec5n l\u00e0 \u0111i\u1ec1u th\u01b0\u1eddng g\u1eb7p trong cu\u1ed9c s\u1ed1ng hi\u1ec7n \u0111\u1ea1i.\u00a0<\/span><\/p>\n

H\u00ecnh x\u0103m, v\u1ed1n \u0111\u01b0\u1ee3c xem x\u00e9t nh\u01b0 m\u1ed9t s\u1ef1 cam k\u1ebft tr\u1ecdn \u0111\u1eddi, nay nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t l\u1ed1i tho\u00e1t hi\u1ec7u qu\u1ea3. May m\u1eafn thay, c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i mang \u0111\u1ebfn m\u1ed9t gi\u1ea3i ph\u00e1p c\u1ef1c k\u1ef3 h\u1eefu \u00edch, g\u1ea7n nh\u01b0 ho\u00e0n h\u1ea3o: x\u00f3a h\u00ecnh x\u0103m b\u1eb1ng laser. \u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t quy tr\u00ecnh th\u1ea9m m\u1ef9 m\u00e0 c\u00f2n ch\u1ee9ng minh cho s\u1ef1 giao thoa gi\u1eefa v\u1eadt l\u00fd h\u1ecdc, quang h\u1ecdc v\u00e0 sinh h\u1ecdc c\u01a1 th\u1ec3 ng\u01b0\u1eddi.<\/span><\/p>\n

\u0110\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1ch tia laser c\u00f3 kh\u1ea3 n\u0103ng x\u00f3a b\u1ecf ho\u00e0n to\u00e0n v\u1ebft ti\u00eam s\u1eafc t\u1ed1 k\u00e9o d\u00e0i nhi\u1ec1u n\u0103m, tr\u01b0\u1edbc ti\u00ean c\u1ea7n ph\u1ea3i hi\u1ec3u v\u1ec1 sinh h\u1ecdc c\u1ee7a h\u00ecnh x\u0103m v\u00e0 c\u00e1ch c\u01a1 th\u1ec3 ph\u1ea3n \u1ee9ng v\u1edbi n\u00f3.<\/span><\/p>\n

H\u00ecnh x\u0103m v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t v\u1ebft s\u1eb9o trang tr\u00ed v\u0129nh vi\u1ec5n \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch ti\u00eam c\u00e1c h\u1ea1t m\u1ef1c kh\u00f4ng h\u00f2a tan v\u00e0o l\u1edbp h\u1ea1 b\u00ec \u2013 l\u1edbp da n\u1eb1m ngay b\u00ean d\u01b0\u1edbi l\u1edbp bi\u1ec3u b\u00ec ngo\u00e0i c\u00f9ng. \u0110\u1ed9 v\u0129nh c\u1eedu c\u1ee7a h\u00ecnh x\u0103m xu\u1ea5t ph\u00e1t t\u1eeb v\u1ecb tr\u00ed ti\u00eam s\u00e2u n\u00e0y. L\u1edbp bi\u1ec3u b\u00ec b\u00ean ngo\u00e0i, v\u1ed1n th\u01b0\u1eddng xuy\u00ean t\u1ef1 \u0111\u1ed5i m\u1edbi v\u00e0 bong tr\u00f3c c\u00e1c t\u1ebf b\u00e0o ch\u1ebft trong m\u1ed9t chu k\u1ef3 v\u00e0i tu\u1ea7n, kh\u00f4ng th\u1ec3 gi\u1eef l\u1ea1i m\u1ef1c l\u00e2u d\u00e0i.\u00a0<\/span><\/p>\n

Ng\u01b0\u1ee3c l\u1ea1i, l\u1edbp h\u1ea1 b\u00ec l\u00e0 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi m\u00f4 li\u00ean k\u1ebft \u1ed5n \u0111\u1ecbnh, \u00edt c\u00f3 s\u1ef1 lu\u00e2n chuy\u1ec3n t\u1ebf b\u00e0o nhanh ch\u00f3ng. Khi kim x\u0103m \u0111\u00e2m xuy\u00ean qua da m\u1ed9t c\u00e1ch nhanh ch\u00f3ng, n\u00f3 \u0111\u01b0a nh\u1eefng h\u1ea1t l\u1ea1 n\u00e0y v\u00e0o. C\u01a1 th\u1ec3 ngay l\u1eadp t\u1ee9c nh\u1eadn ra \u0111\u00f3 l\u00e0 nh\u1eefng t\u00e1c nh\u00e2n x\u00e2m nh\u1eadp v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ed9t ph\u1ea3n \u1ee9ng mi\u1ec5n d\u1ecbch ph\u1ee9c t\u1ea1p. Ph\u1ea3n \u1ee9ng ban \u0111\u1ea7u th\u01b0\u1eddng th\u1ea5y nh\u01b0 m\u1ed9t \u0111\u1ee3t vi\u00eam c\u1ea5p t\u00ednh, n\u01a1i c\u00e1c t\u1ebf b\u00e0o mi\u1ec5n d\u1ecbch chuy\u00ean bi\u1ec7t \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u1ed9ng \u0111\u1ebfn v\u1ecb tr\u00ed t\u1ed5n th\u01b0\u01a1ng. Trong s\u1ed1 c\u00e1c t\u1ebf b\u00e0o n\u00e0y, \u0111\u1ea1i th\u1ef1c b\u00e0o \u2013 \u0111\u01b0\u1ee3c m\u1ec7nh danh l\u00e0 ng\u01b0\u1eddi d\u1ecdn d\u1eb9p c\u1ee7a h\u1ec7 mi\u1ec5n d\u1ecbch \u2013 \u0111\u00f3ng vai tr\u00f2 trung t\u00e2m.<\/span><\/p>\n

\u0110\u1ea1i th\u1ef1c b\u00e0o di chuy\u1ec3n \u0111\u1ebfn v\u1ecb tr\u00ed x\u0103m \u0111\u1ec3 nu\u1ed1t (th\u1ef1c b\u00e0o) v\u00e0 mang v\u1eadt li\u1ec7u l\u1ea1 \u0111i. N\u00f3 c\u1ed1 g\u1eafng bao b\u1ecdc c\u00e1c h\u1ea1t m\u1ef1c v\u1edbi m\u1ee5c ti\u00eau v\u1eadn chuy\u1ec3n c\u00e1c h\u1ea1t n\u00e0y qua h\u1ec7 b\u1ea1ch huy\u1ebft \u0111\u1ec3 b\u00e0i ti\u1ebft. Tuy nhi\u00ean, c\u00e1c h\u1ea1t m\u1ef1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong x\u0103m h\u00ecnh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u00f3 k\u00edch th\u01b0\u1edbc qu\u00e1 l\u1edbn, th\u01b0\u1eddng \u0111\u1ea1t \u0111\u1ebfn k\u00edch th\u01b0\u1edbc v\u00e0i micron, khi\u1ebfn \u0111\u1ea1i th\u1ef1c b\u00e0o kh\u00f4ng th\u1ec3 bao b\u1ecdc v\u00e0 \u0111\u00e0o th\u1ea3i ngay l\u1eadp t\u1ee9c. C\u00e1c \u0111\u1ea1i th\u1ef1c b\u00e0o b\u1ecb \u0111\u1ea7y m\u1ef1c n\u00e0y tr\u1edf n\u00ean b\u1ea5t \u0111\u1ed9ng trong l\u1edbp h\u1ea1 b\u00ec, nh\u1ed1t m\u1ef1c b\u00ean trong. S\u1ef1 v\u0129nh c\u1eedu c\u1ee7a h\u00ecnh x\u0103m b\u1eaft ngu\u1ed3n t\u1eeb s\u1ef1 c\u00e2n b\u1eb1ng \u0111\u1ed9ng n\u00e0y.<\/span><\/p>\n

S\u1ef1 b\u1eaft gi\u1eef s\u1eafc t\u1ed1: Ph\u1ea7n l\u1edbn s\u1eafc t\u1ed1 v\u1eabn b\u1ecb gi\u1eef l\u1ea1i trong l\u1edbp h\u1ea1 b\u00ec. Nh\u1eefng \u0111\u1ea1i th\u1ef1c b\u00e0o ch\u1ee9a m\u1ef1c n\u00e0y t\u1ed3n t\u1ea1i trong m\u00f4 li\u00ean k\u1ebft.<\/span><\/p>\n

Chu k\u1ef3 t\u1ebf b\u00e0o: Khi m\u1ed9t \u0111\u1ea1i th\u1ef1c b\u00e0o ch\u1ebft \u0111i (m\u1ed9t qu\u00e1 tr\u00ecnh t\u1ef1 nhi\u00ean), n\u00f3 ph\u00f3ng th\u00edch c\u00e1c h\u1ea1t m\u1ef1c. C\u00e1c \u0111\u1ea1i th\u1ef1c b\u00e0o m\u1edbi s\u1ebd ngay l\u1eadp t\u1ee9c th\u1ef1c b\u00e0o c\u00e1c h\u1ea1t m\u1ef1c v\u1eeba \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng n\u00e0y. \u0110i\u1ec1u n\u00e0y t\u1ea1o n\u00ean m\u1ed9t chu k\u1ef3 t\u00e1i h\u1ea5p thu v\u00e0 giam gi\u1eef li\u00ean t\u1ee5c.<\/span><\/p>\n

Trong khi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf m\u1ef1c s\u1ebd d\u1ea7n \u0111\u01b0\u1ee3c mang \u0111i theo th\u1eddi gian qua chu tr\u00ecnh n\u00e0y, ph\u1ea7n l\u1edbn s\u1eafc t\u1ed1 v\u1eabn duy tr\u00ec \u1edf v\u1ecb tr\u00ed ban \u0111\u1ea7u. Ch\u00ednh l\u1edbp m\u1ef1c dai d\u1eb3ng v\u00e0 b\u1ecb gi\u1eef l\u1ea1i n\u00e0y l\u00e0m y\u1ebfu t\u1ed1 t\u1ea1o n\u00ean s\u1ef1 b\u1ec1n b\u1ec9 cho h\u00ecnh x\u0103m, v\u00e0 n\u00f3 gi\u1ea3i th\u00edch t\u1ea1i sao ngay c\u1ea3 nh\u1eefng v\u1ebft x\u0103m l\u00e2u \u0111\u1eddi nh\u1ea5t c\u0169ng b\u1ecb phai m\u1edd \u0111\u00f4i ch\u00fat sau nhi\u1ec1u n\u0103m, nh\u01b0ng kh\u00f4ng bao gi\u1edd bi\u1ebfn m\u1ea5t ho\u00e0n to\u00e0n. M\u1ef1c \u0111\u01b0\u1ee3c xem x\u00e9t nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u1ea5u tr\u00fac m\u00f4, \u0111\u01b0\u1ee3c bao b\u1ecdc b\u1edfi c\u00e1c t\u1ebf b\u00e0o s\u1ee3i collagen.<\/span><\/p>\n

\u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac s\u1ee9c m\u1ea1nh c\u1ee7a laser ph\u00e1t huy t\u00e1c d\u1ee5ng, cung c\u1ea5p m\u1ed9t c\u01a1 ch\u1ebf m\u00e0 h\u1ec7 mi\u1ec5n d\u1ecbch kh\u00f4ng th\u1ec3 t\u1ef1 th\u1ef1c hi\u1ec7n. X\u00f3a x\u0103m b\u1eb1ng laser s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 laser Q-switched ho\u1eb7c g\u1ea7n \u0111\u00e2y h\u01a1n, laser Picosecond (Pico). C\u00e1c thi\u1ebft b\u1ecb n\u00e0y ph\u00e1t ra c\u00e1c xung n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng t\u1eadp trung cao \u0111\u1ed9 trong c\u00e1c xung c\u1ef1c ng\u1eafn \u2013 nano gi\u00e2y (10^-9 gi\u00e2y) ho\u1eb7c pico gi\u00e2y (10^-12 gi\u00e2y).<\/span><\/p>\n

Ch\u00eca kh\u00f3a th\u00e0nh c\u00f4ng c\u1ee7a nh\u1eefng c\u00f4ng ngh\u1ec7 n\u00e0y n\u1eb1m \u1edf m\u1ed9t qu\u00e1 tr\u00ecnh v\u1eadt l\u00fd \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 quang nhi\u1ec7t ch\u1ecdn l\u1ecdc (Selective Photothermolysis).<\/span><\/p>\n

Quang nhi\u1ec7t ch\u1ecdn l\u1ecdc y\u00eau c\u1ea7u ba th\u00e0nh ph\u1ea7n quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng g\u00e2y t\u1ed5n th\u01b0\u01a1ng \u0111\u00e1ng k\u1ec3 cho m\u00f4 xung quanh:<\/span><\/p>\n

B\u01b0\u1edbc s\u00f3ng th\u00edch h\u1ee3p: \u00c1nh s\u00e1ng laser \u0111\u01b0\u1ee3c hi\u1ec7u ch\u1ec9nh theo m\u1ed9t b\u01b0\u1edbc s\u00f3ng c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 \u01b0u ti\u00ean b\u1edfi s\u1eafc t\u1ed1 m\u1ef1c x\u0103m (chromophore), \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u s\u1ef1 dung n\u1ea1p c\u1ee7a c\u00e1c m\u00f4 da xung quanh (melanin v\u00e0 hemoglobin).<\/span><\/p>\n

Th\u1eddi gian xung ng\u1eafn: Th\u1eddi gian xung laser ph\u1ea3i ng\u1eafn h\u01a1n th\u1eddi gian th\u01b0 gi\u00e3n nhi\u1ec7t (Thermal Relaxation Time \u2013 TRT) c\u1ee7a m\u1ee5c ti\u00eau (c\u00e1c h\u1ea1t m\u1ef1c). TRT l\u00e0 th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 m\u1ee5c ti\u00eau m\u1ea5t \u0111i 50% nhi\u1ec7t th\u00f4ng qua s\u1ef1 khu\u1ebfch t\u00e1n ra m\u00f4i tr\u01b0\u1eddng xung quanh. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng xung nano ho\u1eb7c pico gi\u00e2y, n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o r\u1ea5t nhanh ch\u00f3ng, g\u00e2y ra s\u1ef1 ph\u00e1 v\u1ee1 quang c\u01a1 (photoacoustic) ho\u1eb7c quang nhi\u1ec7t (photothermal) tr\u01b0\u1edbc khi nhi\u1ec7t c\u00f3 th\u1eddi gian lan t\u1ecfa v\u00e0 l\u00e0m t\u1ed5n th\u01b0\u01a1ng c\u00e1c m\u00f4 kh\u00f4ng ph\u1ea3i m\u1ee5c ti\u00eau.<\/span><\/p>\n

M\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng \u0111\u1ee7: N\u0103ng l\u01b0\u1ee3ng (Fluence) ph\u1ea3i \u0111\u1ee7 cao \u0111\u1ec3 g\u00e2y ra s\u1ef1 v\u1ee1 v\u1ee5n c\u1ee7a h\u1ea1t m\u1ef1c. Khi n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 b\u1edfi c\u00e1c h\u1ea1t m\u1ef1c, n\u00f3 chuy\u1ec3n h\u00f3a th\u00e0nh nhi\u1ec7t \u0111\u1ed9 cao. Nhi\u1ec7t \u0111\u1ed9 c\u1ef1c l\u1edbn n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ef1c nhanh, g\u00e2y ra m\u1ed9t s\u00f3ng xung k\u00edch c\u01a1 h\u1ecdc l\u00e0m cho c\u00e1c h\u1ea1t m\u1ef1c nhanh ch\u00f3ng gi\u00e3n n\u1edf v\u00e0 v\u1ee1 ra. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng nh\u1eefng h\u1ea1t m\u1ef1c l\u1edbn, c\u1ee9ng \u0111\u1ea7u b\u1ecb ph\u00e2n h\u1ee7y th\u00e0nh h\u00e0ng ng\u00e0n m\u1ea3nh nh\u1ecf h\u01a1n, d\u1ec5 x\u1eed l\u00fd h\u01a1n nhi\u1ec1u \u2013 gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1eeb v\u00e0i micron xu\u1ed1ng ch\u1ec9 c\u00f2n v\u00e0i tr\u0103m nanomet.<\/span><\/p>\n

Hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c x\u00f3a x\u0103m b\u1eb1ng laser ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o m\u00e0u s\u1eafc v\u00e0 lo\u1ea1i m\u1ef1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. M\u1ed7i m\u00e0u s\u1eafc dung n\u1ea1p c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng kh\u00e1c nhau \u2013 l\u00fd do t\u1ea1i sao c\u1ea7n nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng laser ho\u1eb7c laser chuy\u00ean d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u tr\u1ecb hi\u1ec7u qu\u1ea3 m\u1ed9t h\u00ecnh x\u0103m nhi\u1ec1u m\u00e0u:<\/span><\/p>\n

M\u00e0u t\u1ed1i (\u0110en v\u00e0 xanh \u0111\u1eadm): Nh\u1eefng m\u00e0u d\u1ec5 x\u00f3a nh\u1ea5t nh\u1edd s\u1ef1 h\u1ea5p th\u1ee5 t\u1ea5t c\u1ea3 c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng kh\u1ea3 ki\u1ebfn v\u00e0 h\u1ed3ng ngo\u1ea1i m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Laser Q-switched ho\u1eb7c Pico s\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng 1064nm r\u1ea5t c\u00f3 hi\u1ec7u qu\u1ea3 trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y. B\u01b0\u1edbc s\u00f3ng 1064nm x\u00e2m nh\u1eadp s\u00e2u nh\u1ea5t v\u00e0o da, nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o m\u1ef1c n\u1eb1m s\u00e2u trong h\u1ea1 b\u00ec.<\/span><\/p>\n

\u0110\u1ecf, cam v\u00e0 v\u00e0ng: Nh\u1eefng m\u00e0u n\u00e0y y\u00eau c\u1ea7u \u00e1nh s\u00e1ng xanh l\u00e1 c\u00e2y c\u1ee5 th\u1ec3 (b\u01b0\u1edbc s\u00f3ng 532nm) \u0111\u1ec3 nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o quang ph\u1ed5 h\u1ea5p th\u1ee5 c\u1ee7a t\u1eebng s\u1eafc th\u00e1i. B\u01b0\u1edbc s\u00f3ng 532nm thu n\u1ea1p m\u1ea1nh b\u1edfi hemoglobin v\u00e0 melanin, n\u00ean \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u0103m s\u00f3c \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 tr\u00e1nh g\u00e2y t\u1ed5n th\u01b0\u01a1ng ngo\u00e0i \u00fd mu\u1ed1n.<\/span><\/p>\n

Xanh l\u00e1 c\u00e2y v\u00e0 xanh d\u01b0\u01a1ng\/da tr\u1eddi: Nh\u1eefng lo\u1ea1i n\u00e0y th\u01b0\u1eddng l\u00e0 kh\u00f3 kh\u0103n nh\u1ea5t v\u00ec th\u01b0\u1eddng c\u1ea7n \u0111\u1ebfn laser Ruby (694nm) ho\u1eb7c laser Alexandrite (755nm). C\u00e1c s\u1eafc t\u1ed1 n\u00e0y c\u00f3 xu h\u01b0\u1edbng ph\u1ea3n \u1ee9ng k\u00e9m v\u1edbi 1064nm v\u00e0 532nm.<\/span><\/p>\n

M\u00e0u tr\u1eafng: C\u00e1c s\u1eafc t\u1ed1 m\u00e0u tr\u1eafng ho\u1eb7c m\u00e0u da (th\u01b0\u1eddng ch\u1ee9a Titan Dioxide ho\u1eb7c K\u1ebdm Oxide) r\u1ea5t kh\u00f3 x\u00f3a. Laser c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 h\u00f3a \u0111en (oxid h\u00f3a) c\u1ee7a c\u00e1c h\u1ea1t n\u00e0y, khi\u1ebfn h\u00ecnh x\u0103m chuy\u1ec3n sang m\u00e0u \u0111en s\u1eabm v\u00e0 tr\u1edf n\u00ean v\u0129nh vi\u1ec5n.<\/span><\/p>\n

V\u00ec tia laser \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 ch\u1ec9 nh\u1eafm v\u00e0o c\u00e1c m\u00e0u s\u1eafc t\u1ed1 c\u1ee5 th\u1ec3, n\u00ean v\u00f9ng da xung quanh, v\u1ed1n ch\u1ee9a m\u1ed9t s\u1eafc t\u1ed1 kh\u00e1c (melanin), s\u1ebd kh\u00f4ng b\u1ecb t\u1ed5n th\u01b0\u01a1ng \u0111\u00e1ng k\u1ec3, ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng thay \u0111\u1ed5i m\u00e0u da v\u0129nh vi\u1ec5n (t\u0103ng ho\u1eb7c gi\u1ea3m s\u1eafc t\u1ed1) ho\u1eb7c b\u1ecb \u0103n m\u00f2n.<\/span><\/p>\n

Sau khi tia laser ho\u00e0n th\u00e0nh vi\u1ec7c ph\u00e2n m\u1ea3nh s\u1eafc t\u1ed1, h\u1ec7 th\u1ed1ng \u0111\u00e0o th\u1ea3i t\u1ef1 nhi\u00ean c\u1ee7a c\u01a1 th\u1ec3 s\u1ebd ti\u1ebfp qu\u1ea3n \u2013 ho\u00e0n th\u00e0nh nhi\u1ec7m v\u1ee5 m\u00e0 tr\u01b0\u1edbc \u0111\u00e2y n\u00f3 kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c. \u0110\u00e2y l\u00e0 giai \u0111o\u1ea1n sinh h\u1ecdc quan tr\u1ecdng x\u00e1c \u0111\u1ecbnh hi\u1ec7u qu\u1ea3 c\u1ee7a to\u00e0n b\u1ed9 quy tr\u00ecnh.<\/span><\/p>\n

Th\u1ef1c b\u00e0o c\u1ee7a \u0111\u1ea1i th\u1ef1c b\u00e0o<\/span><\/p>\n

C\u00e1c \u0111\u1ea1i th\u1ef1c b\u00e0o v\u1ed1n b\u1ecb qu\u00e1 t\u1ea3i b\u1edfi c\u00e1c h\u1ea1t m\u1ef1c l\u1edbn gi\u1edd \u0111\u00e2y d\u1ec5 d\u00e0ng nu\u1ed1t ch\u1eedng c\u00e1c m\u1ea3nh m\u1ef1c nh\u1ecf li ti, v\u1ee1 v\u1ee5n (nanoparticle). S\u1ef1 gi\u1ea3m k\u00edch th\u01b0\u1edbc \u0111\u00e1ng k\u1ec3 n\u00e0y cho ph\u00e9p qu\u00e1 tr\u00ecnh th\u1ef1c b\u00e0o di\u1ec5n ra hi\u1ec7u qu\u1ea3.<\/span><\/p>\n

V\u1eadn chuy\u1ec3n qua h\u1ec7 b\u1ea1ch huy\u1ebft<\/span><\/p>\n

C\u00e1c t\u1ebf b\u00e0o mi\u1ec5n d\u1ecbch ch\u1ee9a \u0111\u1ea7y s\u1eafc t\u1ed1 (\u0111\u1ea1i th\u1ef1c b\u00e0o) sau \u0111\u00f3 \u0111i v\u00e0o h\u1ec7 b\u1ea1ch huy\u1ebft, m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng mi\u1ec5n d\u1ecbch ch\u1ecbu tr\u00e1ch nhi\u1ec7m l\u00e0m s\u1ea1ch c\u00e1c m\u1ea3nh v\u1ee5n v\u00e0 ch\u1ea5t th\u1ea3i c\u1ee7a t\u1ebf b\u00e0o. D\u1ecbch b\u1ea1ch huy\u1ebft mang c\u00e1c \u0111\u1ea1i th\u1ef1c b\u00e0o ch\u1ee9a \u0111\u1ea7y s\u1eafc t\u1ed1 ra kh\u1ecfi da v\u00e0 d\u1eabn ch\u00fang \u0111\u1ebfn c\u00e1c h\u1ea1ch b\u1ea1ch huy\u1ebft \u2013 \u0111\u01b0\u1ee3c xem nh\u01b0 c\u00e1c tr\u1ea1m l\u1ecdc c\u1ee7a c\u01a1 th\u1ec3.<\/span><\/p>\n

B\u00e0i ti\u1ebft cu\u1ed1i c\u00f9ng<\/span><\/p>\n

T\u1ea1i c\u00e1c h\u1ea1ch b\u1ea1ch huy\u1ebft, c\u00e1c m\u1ea3nh m\u1ef1c s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd th\u00eam v\u00e0 cu\u1ed1i c\u00f9ng chuy\u1ec3n \u0111\u1ebfn gan. Gan x\u1eed l\u00fd c\u00e1c m\u1ea3nh m\u1ef1c c\u00f2n s\u00f3t l\u1ea1i, gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 ch\u1ea5t th\u1ea3i sinh h\u1ecdc n\u00e0o kh\u00e1c, v\u00e0 chu\u1ea9n b\u1ecb cho vi\u1ec7c b\u00e0i ti\u1ebft. Nh\u1eefng g\u00ec c\u00f2n s\u00f3t l\u1ea1i c\u1ee7a h\u00ecnh x\u0103m cu\u1ed1i c\u00f9ng s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u00e0 \u0111\u00e0o th\u1ea3i kh\u1ecfi c\u01a1 th\u1ec3 th\u00f4ng qua ph\u00e2n ho\u1eb7c n\u01b0\u1edbc ti\u1ec3u.<\/span><\/p>\n

C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u1ea7n \u0111i\u1ec1u tr\u1ecb v\u00e0 k\u1ebft qu\u1ea3\u00a0<\/span><\/p>\n

M\u1eb7c d\u00f9 qu\u00e1 tr\u00ecnh n\u00e0y r\u1ea5t hi\u1ec7u qu\u1ea3, nh\u01b0ng n\u00f3 \u0111\u00f2i h\u1ecfi nhi\u1ec1u bu\u1ed5i \u0111i\u1ec1u tr\u1ecb, th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb s\u00e1u \u0111\u1ebfn 12 bu\u1ed5i ho\u1eb7c h\u01a1n, c\u00e1ch nhau v\u00e0i tu\u1ea7n (th\u01b0\u1eddng l\u00e0 b\u1ed1n \u0111\u1ebfn t\u00e1m tu\u1ea7n) \u0111\u1ec3 c\u01a1 th\u1ec3 c\u00f3 \u0111\u1ee7 th\u1eddi gian \u0111\u00e0o th\u1ea3i c\u00e1c m\u1ea3nh v\u1ee5n sau m\u1ed7i l\u1ea7n \u0111i\u1ec1u tr\u1ecb b\u1eb1ng laser. S\u1ef1 ki\u00ean nh\u1eabn v\u1eabn r\u1ea5t quan tr\u1ecdng, v\u00ec c\u01a1 th\u1ec3 c\u1ea7n th\u1eddi gian \u0111\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 d\u1ecdn d\u1eb9p sinh h\u1ecdc.<\/span><\/p>\n

T\u1ed1c \u0111\u1ed9 \u0111\u00e0o th\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1:<\/span><\/p>\n

H\u1ec7 mi\u1ec5n d\u1ecbch c\u1ee7a m\u1ed7i ng\u01b0\u1eddi: M\u1ed9t h\u1ec7 mi\u1ec5n d\u1ecbch kh\u1ecfe m\u1ea1nh, m\u1ea1nh m\u1ebd s\u1ebd \u0111\u00e0o th\u1ea3i m\u1ef1c nhanh.<\/span><\/p>\n

V\u1ecb tr\u00ed h\u00ecnh x\u0103m: C\u00e1c h\u00ecnh x\u0103m n\u1eb1m \u1edf c\u00e1c khu v\u1ef1c c\u00f3 ngu\u1ed3n cung c\u1ea5p m\u00e1u v\u00e0 b\u1ea1ch huy\u1ebft phong ph\u00fa (v\u00ed d\u1ee5: c\u1ed5, m\u1eb7t, th\u00e2n tr\u00ean) th\u01b0\u1eddng x\u00f3a nhanh h\u01a1n c\u00e1c khu v\u1ef1c xa (v\u00ed d\u1ee5: m\u1eaft c\u00e1 ch\u00e2n, ng\u00f3n tay).<\/span><\/p>\n

Lo\u1ea1i m\u1ef1c v\u00e0 \u0111\u1ed9 s\u00e2u: M\u1ef1c nghi\u1ec7p d\u01b0 th\u01b0\u1eddng d\u1ec5 x\u00f3a h\u01a1n m\u1ef1c chuy\u00ean nghi\u1ec7p v\u00ec th\u01b0\u1eddng n\u00f4ng h\u01a1n v\u00e0 kh\u00f4ng \u0111\u1ec1u. M\u1ef1c ch\u1ee9a kim lo\u1ea1i n\u1eb7ng th\u01b0\u1eddng kh\u00f3 x\u00f3a.<\/span><\/p>\n

M\u00e0u da v\u00e0 nguy c\u01a1 s\u1eb9o: Ng\u01b0\u1eddi c\u00f3 l\u00e0n da s\u00e1ng h\u01a1n \u0111\u01b0\u1ee3c \u0111i\u1ec1u tr\u1ecb b\u1eb1ng n\u0103ng l\u01b0\u1ee3ng cao h\u01a1n m\u00e0 kh\u00f4ng g\u00e2y ra c\u00e1c ph\u1ea3n \u1ee9ng b\u1ea5t l\u1ee3i, d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 nhanh h\u01a1n.<\/span><\/p>\n

V\u1ec1 c\u01a1 b\u1ea3n, x\u00f3a x\u0103m b\u1eb1ng laser l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p th\u00f4ng minh gi\u1eefa v\u1eadt l\u00fd ti\u00ean ti\u1ebfn (t\u00e1c d\u1ee5ng quang nhi\u1ec7t\/quang c\u01a1 c\u1ee7a tia laser) v\u00e0 h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd ch\u1ea5t th\u1ea3i sinh h\u1ecdc b\u1ec1n v\u1eefng c\u1ee7a c\u01a1 th\u1ec3 (h\u1ec7 mi\u1ec5n d\u1ecbch v\u00e0 b\u1ea1ch huy\u1ebft), mang l\u1ea1i kh\u1ea3 n\u0103ng c\u00f3 \u0111\u01b0\u1ee3c l\u00e0n da s\u1ea1ch s\u1ebd v\u00e0 m\u1ed9t kh\u1edfi \u0111\u1ea7u m\u1edbi v\u1ec1 m\u1eb7t th\u1ea9m m\u1ef9. C\u00f4ng ngh\u1ec7 n\u00e0y li\u00ean t\u1ee5c ph\u00e1t tri\u1ec3n v\u1edbi s\u1ef1 ra \u0111\u1eddi c\u1ee7a laser Pico, gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c m\u00e0u kh\u00f3 v\u00e0 l\u00e0m gi\u1ea3m s\u1ed1 l\u1ea7n \u0111i\u1ec1u tr\u1ecb c\u1ea7n thi\u1ebft.<\/span><\/p>\n

(theo Mentalfloss)<\/span><\/p>\n

The post X\u00f3a h\u00ecnh x\u0103m b\u1eb1ng laser<\/a> appeared first on Saigon Nh\u1ecf<\/a>.<\/p>\n

\u00a0<\/p>","protected":false},"excerpt":{"rendered":"

Jessica Tr\u1ea7n c\u00f3 m\u1ed9t h\u00ecnh x\u0103m tr\u00ean c\u00e1nh tay, l\u00e0 m\u1ed9t k\u1ef7 ni\u1ec7m v\u1edbi ng\u01b0\u1eddi y\u00eau c\u0169 gi\u1edd l\u00e0\u2026 ng\u01b0\u1eddi xa l\u1ea1, n\u00ean c\u00f4 mu\u1ed1n x\u00f3a n\u00f3 \u0111i. \u201cTh\u1ea5y tr\u00ean Facebook qu\u1ea3ng c\u00e1o x\u00f3a h\u00ecnh x\u0103m b\u1eb1ng laser, ch\u1eb3ng bi\u1ebft c\u00f3 an to\u00e0n kh\u00f4ng,\u201d Jessica b\u0103n kho\u0103n. C\u00f3 l\u1ebd nhi\u1ec1u ng\u01b0\u1eddi t\u1eebng nghe nh\u1eefng c\u00e2u …<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[43],"tags":[],"class_list":["post-62401","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health"],"_links":{"self":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/posts\/62401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/comments?post=62401"}],"version-history":[{"count":0,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/posts\/62401\/revisions"}],"wp:attachment":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/media?parent=62401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/categories?post=62401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/tags?post=62401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}