V\u00ec sao b\u00e0i vi\u1ebft n\u00e0y c\u00f3 \u1edf \u0111\u00e2y: <\/strong><\/em><\/p>\n\n\n\n V\u00ec c\u00e1c b\u00e0i vi\u1ebft tr\u00ean facebook tr\u00f4i r\u1ea5t nhanh v\u00e0 vi\u1ec7c t\u00ecm ki\u1ebfm l\u1ea1i nh\u1eefng b\u00e0i vi\u1ebft c\u0169 t\u1eeb c\u00e1ch \u0111\u00e2y m\u1ea5y n\u0103m l\u00e0 m\u1ed9t vi\u1ec7c r\u1ea5t kh\u00f3 kh\u0103n n\u00ean xin ph\u00e9p t\u00e1c gi\u1ea3 \u0111\u01b0\u1ee3c tr\u00edch \u0111\u0103ng l\u1ea1i \u1edf trang web n\u00e0y, nh\u01b0 l\u00e0 m\u1ed9t bookmark \u0111\u1ec3 ti\u1ec7n vi\u1ec7c t\u00ecm ki\u1ebfm khi c\u1ea7n tra c\u1ee9u v\u1ec1 sau. Xin c\u1ea3m \u01a1n BS Tr\u1ea7n V\u0103n Ph\u00fac r\u1ea5t nhi\u1ec1u<\/em>!<\/p>\n\n\n\n T\u00d3M T\u1eaeT<\/strong><\/p>\n\n\n\n T\u00f4i b\u1eaft \u0111\u1ea7u si\u00eau \u00e2m thai theo tu\u1ea7n t\u1ef1 protocol.<\/em><\/p>\n\n\n\n Ngo\u00e0i d\u1ecb t\u1eadt d\u00ednh ng\u00f3n tay v\u00e0 ng\u00f3n ch\u00e2n c\u1ea3 2 b\u00ean, c\u00f2n k\u00e8m theo c\u00e1c d\u1ecb t\u1eadt ph\u1ee9c t\u1ea1p kh\u00e1c; v\u00e0 c\u00e2u chuy\u1ec7n b\u1eaft \u0111\u1ea7u tr\u1edf n\u00ean r\u1eafc r\u1ed1i.<\/p>\n\n\n\n D\u00e2y r\u1ed1n c\u1ee7a em b\u00e9 t\u00f4i ph\u00e1t hi\u1ec7n cu\u1ed9n ch\u1eb7t l\u1ea1i nh\u01b0 chi\u1ebfc th\u1eebng!<\/p>\n\n\n\n T\u00f4i xin gi\u1edbi thi\u1ec7u qua v\u1ec1 c\u1ea5u tr\u00fac gi\u1ea3i ph\u1eabu.<\/em><\/p>\n\n\n\n D\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng c\u00f3 3 m\u1ea1ch m\u00e1u, g\u1ed3m 2 \u0111\u1ed9ng m\u1ea1ch v\u00e0 1 t\u0129nh m\u1ea1ch, cu\u1ed9n theo chi\u1ec1u c\u1ee7a \u1ed1c v\u00edt t\u1eeb b\u00e1nh rau h\u01b0\u1edbng \u0111\u1ebfn ph\u00eda em b\u00e9, t\u1ee9c l\u00e0 xo\u00e1y t\u1eeb tr\u00e1i qua ph\u1ea3i.<\/p>\n\n\n\n Si\u00eau \u00e2m cho b\u00e0 m\u1eb9 t\u00f4i ph\u00e1t hi\u1ec7n th\u1ea5y, d\u00e2y r\u1ed1n cu\u1ed9n ng\u01b0\u1ee3c l\u1ea1i, t\u1ee9c l\u00e0 chi\u1ec1u xoay t\u1eeb ph\u1ea3i sang tr\u00e1i, ch\u1ec9 kho\u1ea3ng 15% thai nhi c\u00f3 d\u00e2y r\u1ed1n xoay ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 nh\u01b0 v\u1eady.<\/p>\n\n\n\n T\u1ea1i sao d\u00e2y r\u1ed1n kh\u00f4ng du\u1ed7i th\u1eb3ng ra?<\/em><\/p>\n\n\n\n V\u00e0o n\u0103m 1696, nh\u00e0 to\u00e1n h\u1ecdc John Bernoulli \u0111\u00e3 \u0111\u01b0a ra m\u1ed9t b\u00e0i to\u00e1n, ngay l\u1eadp t\u1ee9c n\u00f3 tr\u1edf th\u00e0nh cha \u0111\u1ebb c\u1ee7a ng\u00e0nh gi\u1ea3i t\u00edch tr\u00ean c\u01a1 s\u1edf c\u00e1c b\u00e0i to\u00e1n c\u1ef1c tr\u1ecb.<\/p>\n\n\n\n John Bernoulli \u0111\u1eb7t v\u1ea5n \u0111\u1ec1: N\u1ebfu c\u00f3 m\u1ed9t qu\u1ea3 b\u00f3ng nh\u1ecf ch\u1ea1y theo m\u1ed9t \u0111\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B, v\u1edbi \u0111i\u1ec1u ki\u1ec7n A v\u00e0 B kh\u00f4ng tr\u00f9ng ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng, h\u1ecfi \u0111\u01b0\u1eddng \u0111i c\u00f3 h\u00ecnh d\u1ea1ng nh\u01b0 th\u1ebf n\u00e0o th\u00ec qu\u1ea3 b\u00f3ng chuy\u1ec3n \u0111\u1ed9ng v\u1edbi th\u1eddi gian ng\u1eafn nh\u1ea5t.<\/p>\n\n\n\n B\u00e0i to\u00e1n n\u00e0y gi\u1ed1ng nh\u01b0 m\u00e1u c\u1ee7a ng\u01b0\u1eddi m\u1eb9 chuy\u1ec3n \u0111\u1ed9ng t\u1eeb b\u00e1nh rau \u0111\u1ebfn thai nhi ph\u1ea3i theo \u0111\u01b0\u1eddng \u0111i th\u1ebf n\u00e0o l\u00e0 t\u1ed1i \u01b0u nh\u1ea5t. Ch\u1eafc ch\u1eafn ch\u00fang ta \u0111\u1ec1u ngh\u0129 r\u1eb1ng, t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B, ch\u1ec9 c\u00f3 \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng l\u00e0 nhanh nh\u1ea5t. Nh\u01b0ng qua th\u1ef1c nghi\u1ec7m l\u1ea1i kh\u00f4ng \u0111\u00fang nh\u01b0 v\u1eady, t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B c\u00f3 nh\u1eefng \u0111\u01b0\u1eddng v\u00f2ng \u0111i nhanh h\u01a1n, v\u1eady \u0111\u01b0\u1eddng v\u00f2ng n\u00e0o m\u1edbi l\u00e0 nhanh nh\u1ea5t.<\/p>\n\n\n\n B\u00e0i to\u00e1n n\u00e0y l\u00e0 m\u1ed9t th\u00e1ch \u0111\u1ed1 n\u1ed5i ti\u1ebfng!<\/em><\/p>\n\n\n\n Nh\u00e0 b\u00e1c h\u1ecdc Newton \u0111\u00e3 suy ngh\u0129 r\u1ea5t nhi\u1ec1u v\u1ec1 b\u00e0i to\u00e1n n\u00e0y, cu\u1ed1i c\u00f9ng \u00f4ng \u0111\u00e3 gi\u1ea3i quy\u1ebft n\u00f3 nh\u01b0ng ch\u01b0a th\u1ef1c s\u1ef1 t\u1ef1 tin, v\u00ec th\u1ebf m\u00e0 \u00f4ng quy\u1ebft \u0111\u1ecbnh xu\u1ea5t b\u1ea3n \u1ea9n danh tr\u00ean T\u1ea1p ch\u00ed Tri\u1ebft h\u1ecdc c\u1ee7a \u0110\u1ea1i h\u1ecdc Cambridge, v\u1edbi lu\u1eadn c\u1ee9 t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B \u0111i theo \u0111\u01b0\u1eddng v\u00f2ng c\u00f3 th\u1ec3 nhanh h\u01a1n \u0111\u01b0\u1eddng th\u1eb3ng.<\/p>\n\n\n\n John Bernoulli \u0111\u00e3 s\u1ed1c tr\u01b0\u1edbc l\u1eddi gi\u1ea3i c\u1ee7a Newton, m\u1eb7c d\u00f9 n\u00f3 ch\u01b0a \u0111\u1ea7y \u0111\u1ee7, ph\u1ea3i \u0111\u01b0\u1ee3c nh\u00e0 to\u00e1n h\u1ecdc v\u0129 \u0111\u1ea1i nh\u1ea5t th\u1ebf k\u1ec9 18 l\u00e0 Euler ho\u00e0n thi\u1ec7n b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh bi\u1ebfn ph\u00e2n, bao g\u1ed3m c\u00e1c t\u1ed5 h\u1ee3p t\u00edch ph\u00e2n v\u00e0 vi ph\u00e2n \u0111\u01b0\u1eddng cong mang t\u00ean ph\u01b0\u01a1ng tr\u00ecnh Euler.<\/p>\n\n\n\n D\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng \u0111\u00e3 cu\u1ed9n theo \u0111\u01b0\u1eddng cong k\u00ec l\u1ea1 \u0111\u00f3.<\/p>\n\n\n\n \u0110\u1ebfn \u0111\u00e2y, ch\u00fang ta \u0111\u00e3 hi\u1ec3u r\u1eb1ng n\u1ebfu d\u00e2y r\u1ed1n du\u1ed7i th\u1eb3ng ra, th\u00ec \u0111\u00f3 l\u00e0 tr\u01b0\u1eddng h\u1ee3p b\u1ea5t th\u01b0\u1eddng, b\u00e1o hi\u1ec7u h\u00e0ng lo\u1ea1t nh\u1eefng t\u00ecnh tr\u1ea1ng b\u1ec7nh l\u00ed c\u1ee7a thai nhi.<\/p>\n\n\n\n Nh\u01b0ng t\u1ea1i sao d\u00e2y r\u1ed1n l\u1ea1i u\u1ed1n theo chi\u1ec1u \u1ed1c v\u00edt?<\/p>\n\n\n\n C\u00e2u tr\u1ea3 l\u1eddi kh\u00f4ng kh\u00f3, \u0111\u00f3 ch\u00ednh l\u00e0 hi\u1ec7u \u1ee9ng coriolis v\u1edbi nguy\u00ean l\u00ed d\u01b0\u1edbi nh\u00ecn l\u00ean tr\u00ean s\u1ebd xoay theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, tr\u00ean nh\u00ecn xu\u1ed1ng d\u01b0\u1edbi s\u1ebd ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n\n\n N\u1ebfu b\u1ea1n \u0111\u1ecdc leo c\u1ea7u thang s\u1ebd th\u1ea5y xo\u00e1y tr\u00f4n \u1ed1c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, n\u01b0\u1edbc hay b\u00e3o xo\u00e1y c\u0169ng v\u1eady, \u1ed1c v\u00edt, c\u00e1nh qu\u1ea1t quay, r\u1ed3i m\u1ecdi th\u1ee9 trong t\u1ef1 nhi\u00ean d\u00f9 mu\u1ed1n d\u00f9 kh\u00f4ng \u0111\u1ec1u tu\u00e2n theo quy lu\u1eadt n\u00e0y.<\/p>\n\n\n\n V\u00e0 d\u00e2y r\u1ed1n c\u1ee7a thai nhi c\u0169ng xoay theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3!<\/p>\n\n\n\n Nh\u01b0ng d\u00e2y r\u1ed1n cu\u1ed9n \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, v\u01b0\u1ee3t qu\u00e1 m\u1ee9c \u0111\u1ed9 \u0111\u00f3 th\u00ec d\u00f2ng m\u00e1u s\u1ebd b\u1ecb c\u1ea3n tr\u1edf, l\u00fac \u0111\u00f3 l\u00e0 t\u00ecnh tr\u1ea1ng b\u1ea5t th\u01b0\u1eddng, c\u00f3 th\u1ec3 g\u00e2y ra m\u1ed9t lo\u1ea1t nh\u1eefng h\u1ec7 l\u1ee5y cho thai nhi\u00ed.<\/p>\n\n\n\n T\u00f4i ti\u1ebfp t\u1ee5c ph\u00e1t hi\u1ec7n d\u00e2y r\u1ed1n c\u1ee7a em b\u00e9 cu\u1ed9n qu\u00e1 m\u1ee9c.<\/em><\/p>\n\n\n\n T\u00e0i li\u1ec7u y khoa l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u00e2y r\u1ed1n b\u1ecb cu\u1ed9n qu\u00e1 m\u1ee9c, do Berengarius m\u00f4 t\u1ea3, v\u00e0o n\u0103m 1521. Nh\u01b0ng ph\u1ea3i m\u00e3i n\u0103m 1954, Edmonds m\u1edbi d\u00f9ng thu\u1eadt ng\u1eef \u201cCh\u1ec9 s\u1ed1 xo\u1eafn – Index of twist\u201d \u0111\u1ec3 m\u00f4 t\u1ea3 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c n\u00e0y.<\/p>\n\n\n\n Trong th\u1ef1c t\u1ebf ch\u1eef \u201ctwist \u2013 xo\u1eafn\u201d l\u00e0 kh\u00f4ng ph\u00f9 h\u1ee3p.<\/em><\/p>\n\n\n\n D\u00e2y r\u1ed1n b\u1ecb xo\u1eafn (twisting of the umbilical cord) l\u00e0 m\u1ed9t t\u00ecnh hu\u1ed1ng tai n\u1ea1n d\u00e2y r\u1ed1n kh\u1ea9n c\u1ea5p, ngh\u0129a l\u00e0 d\u00e2y r\u1ed1n \u0111ang b\u00ecnh th\u01b0\u1eddng t\u1ef1 d\u01b0ng v\u00ec l\u00ed do n\u00e0o \u0111\u00f3 n\u00f3 b\u1ecb xo\u1eafn l\u1ea1i \u0111\u1ed9t ng\u1ed9t \u1edf m\u1ed9t v\u1ecb tr\u00ed, l\u00e0m cho ngu\u1ed1n c\u1ea5p m\u00e1u thai nhi b\u1ecb ch\u1eb7n l\u1ea1i, d\u1eabn \u0111\u1ebfn thai b\u1ecb ch\u1ebft.<\/p>\n\n\n\n B\u00e0i vi\u1ebft n\u00e0y t\u00f4i kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u00e2y r\u1ed1n b\u1ecb xo\u1eafn.<\/p>\n\n\n\n N\u0103m 1994, Jr Strong \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t thu\u1eadt ng\u1eef thay th\u1ebf \u201cCh\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n – Umbilical coil index\u201d vi\u1ebft t\u1eaft l\u00e0 UCI.<\/p>\n\n\n\n Nh\u01b0 v\u1eady, v\u1ec1 m\u1eb7t thu\u1eadt ng\u1eef t\u00f4i c\u00f3 quan \u0111i\u1ec3m kh\u00f4ng d\u00f9ng ch\u1eef \u201cxo\u1eafn \u2013 twist\u201d trong tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y, m\u00e0 \u0111\u1ec1 xu\u1ea5t c\u1ee7a t\u00f4i l\u00e0:<\/p>\n\n\n\n Ti\u00eau ch\u00ed \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n x\u00e1c \u0111\u1ecbnh d\u00e2y r\u1ed1n cu\u1ed9n \u00edt, ho\u1eb7c d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c, b\u1eaft bu\u1ed9c ph\u1ea3i d\u1ef1a v\u00e0o ch\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n (UCI).<\/p>\n\n\n\n N\u0103m 1995, Degani S \u0111\u00e3 \u0111\u01b0a ra c\u00e1ch t\u00ednh ch\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n UCI. Theo \u0111\u00f3, UCI l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a s\u1ed1 \u0111o chi\u1ec1u dai m\u1ed9t cu\u1ed9n d\u00e2y r\u1ed1n t\u00ednh b\u1eb1ng cm.<\/p>\n\n\n\n UCI = 1\/d<\/p>\n\n\n\n Theo t\u00f4i, c\u00e1ch t\u00ednh n\u00e0y s\u00e1ng s\u1ee7a v\u1ec1 m\u1eb7t ng\u1eef ngh\u0129a, nh\u01b0ng r\u00f5 r\u00e0ng ph\u00e9p \u0111o chi\u1ec1u d\u00e0i c\u1ee7a 1 cu\u1ed9n s\u1ebd c\u00f3 \u0111\u1ed9 l\u1ec7ch l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi ph\u00e9p \u0111o trung b\u00ecnh c\u1ed9ng.<\/p>\n\n\n\n B\u1edfi v\u1eady, t\u00f4i \u0111\u1ec1 xu\u1ea5t c\u00e1ch do UCI l\u00e0 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n chia cho chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c cu\u1ed9n d\u00e2y r\u1ed1n \u0111\u00f3, v\u1ec1 b\u1ea3n ch\u1ea5t gi\u1ed1ng h\u1ec7t Degani.<\/p>\n\n\n\n Thai nhi 3 th\u00e1ng cu\u1ed1i d\u00e2y r\u1ed1n \u1ed5n \u0111\u1ecbnh, tai bi\u1ebfn c\u0169ng hay x\u1ea3y ra trong th\u1eddi k\u00ec n\u00e0y. Tuy nhi\u00ean, si\u00eau \u00e2m c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm h\u01a1n \u1edf tu\u1ea7n th\u1ee9 22.<\/p>\n\n\n\n UCI < 0,15 l\u00e0 d\u00e2y r\u1ed1n cu\u1ed9n \u00edt. Ng\u01b0\u1eddi ph\u1ee5 n\u1eef nh\u1edd t\u00f4i si\u00eau \u00e2m, th\u1eadt bu\u1ed3n, ch\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n UCI = 0,45 n\u00ean to\u00e0n b\u1ed9 d\u00e2y r\u1ed1n h\u00ecnh d\u00e2y th\u1eebng, n\u00f3 b\u1ecb r\u00fat ng\u1eafn l\u1ea1i, c\u0103ng ra. Th\u1eddi \u0111i\u1ec3m t\u00f4i si\u00eau \u00e2m \u0111\u00e3 th\u1ea5y t\u1ea1i v\u1ecb tr\u00ed b\u00e1nh rau b\u1eaft \u0111\u1ea7u c\u00f3 d\u1ea5u hi\u1ec7u b\u1ecb bong, \u0111\u00e2y l\u00e0 \u0111i\u1ec3m y\u1ebfu d\u1ec5 g\u00e2y \u0111\u1ee9t d\u00e2y r\u1ed1n n\u00ean khi si\u00eau \u00e2m d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c ph\u1ea3i r\u1ea5t ch\u00fa \u00fd, c\u1ea3 ch\u1ed7 d\u00e2y r\u1ed1n b\u00e1m v\u00e0o b\u1ee5ng thai nhi c\u0169ng d\u1ec5 b\u1ecb \u0111\u1ee9t.<\/p>\n\n\n\n C\u00f3 4 ki\u1ec3u d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c: nh\u1ea5p nh\u00f4, d\u00e2y th\u1eebng, ph\u00e2n \u0111o\u1ea1n v\u00e0 li\u00ean k\u1ebft, m\u1ed7i ki\u1ec3u \u0111\u1ec1u c\u00f3 c\u00e1c v\u1ebft l\u00f5m s\u00e2u d\u1ea7n v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh d\u00e2y r\u1ea5t \u0111\u1eb7c tr\u01b0ng; m\u1ed7i ki\u1ec3u l\u1ea1i g\u00e2y ra nh\u1eefng h\u1ec7 l\u1ee5y kh\u00e1c nhau.<\/p>\n\n\n\n V\u00ed d\u1ee5 b\u00e0 m\u1eb9 m\u00e0 t\u00f4i \u0111ang k\u1ec3, th\u1eadt kh\u00f4ng may, d\u00e2y r\u1ed1n cu\u1ed9n ch\u1eb7t nh\u01b0 chi\u1ebfc th\u1eebng, n\u00f3 l\u1ea1i cu\u1ed1n quanh c\u1ed5 l\u00e0m cho b\u00e0o thai b\u1ecb th\u1eaft c\u1ed5 tr\u00ean ch\u00ednh d\u00e2y r\u1ed1n c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n Thai nhi b\u1ecb ch\u1ebft l\u01b0u ch\u1ec9 sau \u0111\u00f3 v\u00e0i ng\u00e0y.<\/p>\n\n\n\n\n\n\n\n SI\u00caU \u00c2M D\u00c2Y R\u1ed0N CU\u1ed8N QU\u00c1 M\u1ee8C<\/strong><\/p>\n\n\n\n \u0110\u1ec3 l\u00e0m m\u1ed9t b\u00e1c s\u0129 si\u00eau \u00e2m, b\u1ea1n ph\u1ea3i c\u00f3 \u0111\u00f4i m\u1eaft th\u1eadt s\u00e1ng. V\u1edbi nh\u1eefng m\u1eb9 b\u1ea7u, ch\u1ed7 d\u1ef1a v\u1eefng ch\u1eafc nh\u1ea5t kh\u00f4ng ph\u1ea3i l\u00e0 ng\u01b0\u1eddi ch\u1ed3ng, c\u0169ng ch\u1eb3ng ph\u1ea3i b\u1ed1 m\u1eb9 sinh ra m\u00ecnh, m\u00e0 \u0111\u00f3 l\u00e0 b\u00e1c s\u0129 si\u00eau \u00e2m.<\/p>\n\n\n\n H\u01a1n 20 n\u0103m l\u00e0m b\u00e1c s\u0129, kh\u00f4ng \u00edt l\u1ea7n t\u00f4i ph\u1ea3i tr\u1edf th\u00e0nh \u201chi\u1ec7p s\u0129\u201d d\u0169ng c\u1ea3m, ho\u1eb7c l\u00e0 ng\u0103n ch\u1eb7n t\u00ednh m\u1ea1ng c\u1ee7a nh\u1eefng \u0111\u1ee9a tr\u1ebb ch\u1ebft v\u00ec nh\u1eefng l\u01b0\u1ee1i dao, ho\u1eb7c c\u1ee9u nh\u1eefng h\u00e0i nhi tho\u00e1t ch\u1ebft tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c sinh ra.<\/p>\n\n\n\n Ai c\u0169ng ngh\u0129 b\u00e1c s\u0129 si\u00eau \u00e2m ch\u1ec9 ng\u1ed3i m\u00e2n m\u00ea ngh\u1ecbch ng\u1ee3m c\u00e1i \u0111\u1ea7u d\u00f2 b\u1eb1ng c\u1ed5 tay, r\u1ed3i xem nh\u1eefng h\u00ecnh \u1ea3nh \u0111en v\u00e0 tr\u1eafng, ch\u1eb3ng c\u00f3 g\u00ec l\u00e0 cao si\u00eau. Nh\u01b0ng t\u00f4i kh\u00f4ng ngh\u0129 v\u1eady. B\u00e1c s\u0129 si\u00eau \u00e2m s\u1ea3n khoa ph\u1ea3i c\u00f3 con m\u1eaft nh\u00ecn th\u1ea5u s\u1ef1 \u0111\u1eddi, b\u1edfi suy cho c\u00f9ng, m\u1ed9t sinh m\u1ea1ng b\u1ecb \u0111\u00e1nh m\u1ea5t v\u00ec nh\u1eefng sai l\u1ea7m c\u1ee7a b\u00e1c s\u0129 si\u00eau \u00e2m, m\u1ed9t sinh linh b\u00e9 nh\u1ecf s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c nh\u00ecn th\u1ea5y \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi.<\/p>\n\n\n\n H\u00f4m nay, nh\u00e2n c\u00f3 \u0111\u1ed3ng nghi\u1ec7p l\u00e0 b\u00e1c s\u0129 h\u1ecfi t\u00f4i v\u1ec1 d\u00e2y r\u1ed1n b\u1ecb cu\u1ed9n qu\u00e1 m\u1ee9c, \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea5t th\u01b0\u1eddng c\u00f3 th\u1ec3 g\u00e2y ch\u1ebft \u0111\u1ee9a tr\u1ebb n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c theo d\u00f5i s\u00e1t \u0111\u1ec3 m\u1ed5 l\u1ea5y thai khi b\u1eaft \u0111\u1ea7u c\u00f3 bi\u1ec3u hi\u1ec7n tai bi\u1ebfn, v\u00ec th\u1ebf m\u00e0 t\u00f4i quy\u1ebft \u0111\u1ecbnh vi\u1ebft m\u1ed9t b\u00e0i n\u00f3i ri\u00eang v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n\n\n\n T\u00f4i nh\u1edb r\u1eb1ng, c\u0169ng v\u00e0o kho\u1ea3ng th\u1eddi \u0111i\u1ec3m n\u00e0y n\u0103m ngo\u00e1i, m\u1ed9t b\u1ea1n nh\u00e2n vi\u00ean b\u00ean SYT nh\u1edd t\u00f4i si\u00eau \u00e2m cho ng\u01b0\u1eddi b\u1ea1n, b\u1edfi tr\u01b0\u1edbc \u0111\u00f3 si\u00eau \u00e2m n\u01a1i kh\u00e1c c\u00f3 k\u1ebft q\u1ee7a nghi ng\u1edd d\u1ecb t\u1eadt d\u00ednh ng\u00f3n tay.<\/p>\n\n\n\n Ng\u01b0\u1eddi m\u1eb9 n\u00e0y \u0111\u00e3 30 tu\u1ed5i, \u0111ang c\u1ed1 g\u1eafng \u0111\u1ec3 c\u00f3 thai, si\u00eau \u00e2m \u0111\u00fang tu\u1ea7n th\u1ee9 25 b\u00e1c s\u0129 n\u00f3i c\u1ea7n v\u00e0o vi\u1ec7n ch\u1ecdc \u1ed1i v\u00e0 l\u00e0m c\u00e1c th\u1ee7 thu\u1eadt kh\u00e1c \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n b\u1ea5t th\u01b0\u1eddng nhi\u1ec5m s\u1eafc th\u1ec3. Nh\u1eefng ng\u01b0\u1eddi \u0111\u1ecdc Facebook c\u1ee7a t\u00f4i \u1edf \u0111\u00e2y, t\u00f4i bi\u1ebft c\u00f3 m\u1ed9t s\u1ed1 b\u00e0 m\u1eb9, ch\u1eafc ai c\u0169ng hi\u1ec3u c\u00e1i c\u1ea3m gi\u00e1c c\u1ee7a t\u00f4i v\u00e0 ng\u01b0\u1eddi ph\u1ee5 n\u1eef \u0111\u00f3.<\/p>\n\n\n\n T\u00f4i ch\u1eb3ng th\u1ec3 qu\u00ean \u00e1nh m\u1eaft c\u1ee7a ng\u01b0\u1eddi m\u1eb9 \u1ea5y, n\u00f3 u s\u1ea7u th\u1ea3ng th\u1ed1t, bi\u1ec3u hi\u1ec7n c\u1ee7a m\u1ed9t ng\u01b0\u1eddi m\u1ea5t ng\u1ee7 v\u00e0 tr\u1ea7m c\u1ea3m. Ch\u01b0a k\u1ecbp chia s\u1ebb g\u00ec nhi\u1ec1u v\u1edbi t\u00f4i, c\u00f4 \u1ea5y \u0111\u00e3 b\u1eadt kh\u00f3c, nh\u1eefng gi\u1ecdt n\u01b0\u1edbc m\u1eaft tr\u00e0n \u01b0\u1edbt khu\u00f4n m\u1eb7t nh\u01b0ng kh\u00f4ng che \u0111\u01b0\u1ee3c n\u1ed7i th\u1ea5t th\u1ea7n.<\/p>\n\n\n\n Th\u1ef1c ra c\u00f4 \u1ea5y t\u00ecm \u0111\u1ebfn t\u00f4i \u0111\u1ec3 mong c\u00f3 m\u1ed9t tia hi v\u1ecdng.<\/p>\n\n\n\n Trong cu\u1ed9c \u0111\u1eddi l\u00e0m b\u00e1c s\u0129, t\u00f4i \u0111\u00e3 t\u1eebng g\u1eb7p nh\u1eefng tr\u01b0\u1eddng h\u1ee3p ch\u1ea9n \u0111o\u00e1n b\u1ea5t th\u01b0\u1eddng thai nhi kinh kh\u1ee7ng h\u01a1n, v\u00ed d\u1ee5 c\u00f3 em b\u00e9 m\u1eb9 c\u0169ng l\u00e0 \u0111\u1ed3ng nghi\u1ec7p c\u1ee7a t\u00f4i, ch\u1ea9n \u0111o\u00e1n b\u1ecb ung th\u01b0 t\u1eeb tu\u1ea7n th\u1ee9 22 trong bu\u1ed3ng t\u1eed cung v\u00e0 b\u00e1c s\u0129 khuy\u00ean n\u00ean b\u1ecf thai, nh\u01b0ng t\u00f4i \u0111\u00e3 k\u1ebft lu\u1eadn \u0111\u00f3 l\u00e0 kh\u1ed1i u l\u00e0nh t\u00ednh v\u00e0 nhi\u1ec1u kh\u1ea3 n\u0103ng \u0111\u1ee9a tr\u1ebb sinh ra u s\u1ebd t\u1ef1 tho\u00e1i tri\u1ec3n.<\/p>\n\n\n\n Sau n\u00e0y em b\u00e9 ho\u00e0n to\u00e0n b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n \u0110i\u1ec1u \u0111\u00f3 l\u00e0m t\u00f4i r\u1ea5t vui, v\u00ec kh\u1ea3 n\u0103ng ph\u00e1n \u0111o\u00e1n v\u00e0 hi\u1ec3u bi\u1ebft m\u00e0 t\u00f4i c\u00f3 \u0111\u01b0\u1ee3c, \u0111\u00e3 gi\u00e0nh l\u1ea1i m\u1ed9t m\u1ea1ng s\u1ed1ng.<\/p>\n\n\n\n T\u00f4i b\u1eaft \u0111\u1ea7u si\u00eau \u00e2m thai theo tu\u1ea7n t\u1ef1 protocol.<\/p>\n\n\n\n Ngo\u00e0i d\u1ecb t\u1eadt d\u00ednh ng\u00f3n tay v\u00e0 ng\u00f3n ch\u00e2n c\u1ea3 2 b\u00ean, c\u00f2n k\u00e8m theo c\u00e1c d\u1ecb t\u1eadt ph\u1ee9c t\u1ea1p kh\u00e1c; v\u00e0 c\u00e2u chuy\u1ec7n b\u1eaft \u0111\u1ea7u tr\u1edf n\u00ean r\u1eafc r\u1ed1i.<\/p>\n\n\n\n D\u00e2y r\u1ed1n c\u1ee7a em b\u00e9 t\u00f4i ph\u00e1t hi\u1ec7n cu\u1ed9n ch\u1eb7t l\u1ea1i nh\u01b0 chi\u1ebfc th\u1eebng!<\/p>\n\n\n\n B\u1ea1n \u0111\u1ecdc h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng, d\u00e2y r\u1ed1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi m\u1ed9t c\u00e1ch kh\u00e9o l\u00e9o \u0111\u00f3 l\u00e0 d\u00e2y s\u1ed1ng c\u1ee7a thai nhi trong su\u1ed1t cu\u1ed9c \u0111\u1eddi n\u1eb1m trong bu\u1ed3ng t\u1eed cung. N\u1ebfu b\u1ecb cu\u1ed9n qu\u00e1 m\u1ee9c m\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ea9n \u0111o\u00e1n s\u1edbm, c\u00f3 th\u1ec3 d\u00e2y r\u1ed1n s\u1ebd g\u00e2y ra n\u1ed7i kh\u1ed1n kh\u1ed5 cho em b\u00e9, th\u1eadm ch\u00ed ph\u1ea3i tr\u1ea3 gi\u00e1 b\u1eb1ng c\u00e1i ch\u1ebft.<\/p>\n\n\n\n T\u00f4i xin gi\u1edbi thi\u1ec7u qua v\u1ec1 c\u1ea5u tr\u00fac gi\u1ea3i ph\u1eabu.<\/p>\n\n\n\n D\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng c\u00f3 3 m\u1ea1ch m\u00e1u, g\u1ed3m 2 \u0111\u1ed9ng m\u1ea1ch v\u00e0 1 t\u0129nh m\u1ea1ch, cu\u1ed9n theo chi\u1ec1u c\u1ee7a \u1ed1c v\u00edt t\u1eeb b\u00e1nh rau h\u01b0\u1edbng \u0111\u1ebfn ph\u00eda em b\u00e9, t\u1ee9c l\u00e0 xo\u00e1y t\u1eeb tr\u00e1i qua ph\u1ea3i.<\/p>\n\n\n\n Si\u00eau \u00e2m cho b\u00e0 m\u1eb9 t\u00f4i ph\u00e1t hi\u1ec7n th\u1ea5y, d\u00e2y r\u1ed1n cu\u1ed9n ng\u01b0\u1ee3c l\u1ea1i, t\u1ee9c l\u00e0 chi\u1ec1u xoay t\u1eeb ph\u1ea3i sang tr\u00e1i, ch\u1ec9 kho\u1ea3ng 15% thai nhi c\u00f3 d\u00e2y r\u1ed1n xoay ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 nh\u01b0 v\u1eady.<\/p>\n\n\n\n T\u1ea1i sao d\u00e2y r\u1ed1n kh\u00f4ng du\u1ed7i th\u1eb3ng ra?<\/p>\n\n\n\n V\u00e0o n\u0103m 1696, nh\u00e0 to\u00e1n h\u1ecdc John Bernoulli \u0111\u00e3 \u0111\u01b0a ra m\u1ed9t b\u00e0i to\u00e1n, ngay l\u1eadp t\u1ee9c n\u00f3 tr\u1edf th\u00e0nh cha \u0111\u1ebb c\u1ee7a ng\u00e0nh gi\u1ea3i t\u00edch tr\u00ean c\u01a1 s\u1edf c\u00e1c b\u00e0i to\u00e1n c\u1ef1c tr\u1ecb.<\/p>\n\n\n\n John Bernoulli \u0111\u1eb7t v\u1ea5n \u0111\u1ec1: N\u1ebfu c\u00f3 m\u1ed9t qu\u1ea3 b\u00f3ng nh\u1ecf ch\u1ea1y theo m\u1ed9t \u0111\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B, v\u1edbi \u0111i\u1ec1u ki\u1ec7n A v\u00e0 B kh\u00f4ng tr\u00f9ng ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng, h\u1ecfi \u0111\u01b0\u1eddng \u0111i c\u00f3 h\u00ecnh d\u1ea1ng nh\u01b0 th\u1ebf n\u00e0o th\u00ec qu\u1ea3 b\u00f3ng chuy\u1ec3n \u0111\u1ed9ng v\u1edbi th\u1eddi gian ng\u1eafn nh\u1ea5t.<\/p>\n\n\n\n B\u00e0i to\u00e1n n\u00e0y gi\u1ed1ng nh\u01b0 m\u00e1u c\u1ee7a ng\u01b0\u1eddi m\u1eb9 chuy\u1ec3n \u0111\u1ed9ng t\u1eeb b\u00e1nh rau \u0111\u1ebfn thai nhi ph\u1ea3i theo \u0111\u01b0\u1eddng \u0111i th\u1ebf n\u00e0o l\u00e0 t\u1ed1i \u01b0u nh\u1ea5t. Ch\u1eafc ch\u1eafn ch\u00fang ta \u0111\u1ec1u ngh\u0129 r\u1eb1ng, t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B, ch\u1ec9 c\u00f3 \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng l\u00e0 nhanh nh\u1ea5t. Nh\u01b0ng qua th\u1ef1c nghi\u1ec7m l\u1ea1i kh\u00f4ng \u0111\u00fang nh\u01b0 v\u1eady, t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B c\u00f3 nh\u1eefng \u0111\u01b0\u1eddng v\u00f2ng \u0111i nhanh h\u01a1n, v\u1eady \u0111\u01b0\u1eddng v\u00f2ng n\u00e0o m\u1edbi l\u00e0 nhanh nh\u1ea5t.<\/p>\n\n\n\n B\u00e0i to\u00e1n n\u00e0y l\u00e0 m\u1ed9t th\u00e1ch \u0111\u1ed1 n\u1ed5i ti\u1ebfng!<\/p>\n\n\n\n Nh\u00e0 b\u00e1c h\u1ecdc Newton \u0111\u00e3 suy ngh\u0129 r\u1ea5t nhi\u1ec1u v\u1ec1 b\u00e0i to\u00e1n n\u00e0y, cu\u1ed1i c\u00f9ng \u00f4ng \u0111\u00e3 gi\u1ea3i quy\u1ebft n\u00f3 nh\u01b0ng ch\u01b0a th\u1ef1c s\u1ef1 t\u1ef1 tin, v\u00ec th\u1ebf m\u00e0 \u00f4ng quy\u1ebft \u0111\u1ecbnh xu\u1ea5t b\u1ea3n \u1ea9n danh tr\u00ean T\u1ea1p ch\u00ed Tri\u1ebft h\u1ecdc c\u1ee7a \u0110\u1ea1i h\u1ecdc Cambridge, v\u1edbi lu\u1eadn c\u1ee9 t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B \u0111i theo \u0111\u01b0\u1eddng v\u00f2ng c\u00f3 th\u1ec3 nhanh h\u01a1n \u0111\u01b0\u1eddng th\u1eb3ng.<\/p>\n\n\n\n John Bernoulli \u0111\u00e3 s\u1ed1c tr\u01b0\u1edbc l\u1eddi gi\u1ea3i c\u1ee7a Newton, m\u1eb7c d\u00f9 n\u00f3 ch\u01b0a \u0111\u1ea7y \u0111\u1ee7, ph\u1ea3i \u0111\u01b0\u1ee3c nh\u00e0 to\u00e1n h\u1ecdc v\u0129 \u0111\u1ea1i nh\u1ea5t th\u1ebf k\u1ec9 18 l\u00e0 Euler ho\u00e0n thi\u1ec7n b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh bi\u1ebfn ph\u00e2n, bao g\u1ed3m c\u00e1c t\u1ed5 h\u1ee3p t\u00edch ph\u00e2n v\u00e0 vi ph\u00e2n \u0111\u01b0\u1eddng cong mang t\u00ean ph\u01b0\u01a1ng tr\u00ecnh Euler.<\/p>\n\n\n\n D\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng \u0111\u00e3 cu\u1ed9n theo \u0111\u01b0\u1eddng cong k\u00ec l\u1ea1 \u0111\u00f3.<\/p>\n\n\n\n \u0110\u1ebfn \u0111\u00e2y, ch\u00fang ta \u0111\u00e3 hi\u1ec3u r\u1eb1ng n\u1ebfu d\u00e2y r\u1ed1n du\u1ed7i th\u1eb3ng ra, th\u00ec \u0111\u00f3 l\u00e0 tr\u01b0\u1eddng h\u1ee3p b\u1ea5t th\u01b0\u1eddng, b\u00e1o hi\u1ec7u h\u00e0ng lo\u1ea1t nh\u1eefng t\u00ecnh tr\u1ea1ng b\u1ec7nh l\u00ed c\u1ee7a thai nhi.<\/p>\n\n\n\n Nh\u01b0ng t\u1ea1i sao d\u00e2y r\u1ed1n l\u1ea1i u\u1ed1n theo chi\u1ec1u \u1ed1c v\u00edt?<\/p>\n\n\n\n C\u00e2u tr\u1ea3 l\u1eddi kh\u00f4ng kh\u00f3, \u0111\u00f3 ch\u00ednh l\u00e0 hi\u1ec7u \u1ee9ng coriolis v\u1edbi nguy\u00ean l\u00ed d\u01b0\u1edbi nh\u00ecn l\u00ean tr\u00ean s\u1ebd xoay theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, tr\u00ean nh\u00ecn xu\u1ed1ng d\u01b0\u1edbi s\u1ebd ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n\n\n N\u1ebfu b\u1ea1n \u0111\u1ecdc leo c\u1ea7u thang s\u1ebd th\u1ea5y xo\u00e1y tr\u00f4n \u1ed1c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, n\u01b0\u1edbc hay b\u00e3o xo\u00e1y c\u0169ng v\u1eady, \u1ed1c v\u00edt, c\u00e1nh qu\u1ea1t quay, r\u1ed3i m\u1ecdi th\u1ee9 trong t\u1ef1 nhi\u00ean d\u00f9 mu\u1ed1n d\u00f9 kh\u00f4ng \u0111\u1ec1u tu\u00e2n theo quy lu\u1eadt n\u00e0y.<\/p>\n\n\n\n V\u00e0 d\u00e2y r\u1ed1n c\u1ee7a thai nhi c\u0169ng xoay theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3!<\/p>\n\n\n\n Nh\u01b0ng d\u00e2y r\u1ed1n cu\u1ed9n \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, v\u01b0\u1ee3t qu\u00e1 m\u1ee9c \u0111\u1ed9 \u0111\u00f3 th\u00ec d\u00f2ng m\u00e1u s\u1ebd b\u1ecb c\u1ea3n tr\u1edf, l\u00fac \u0111\u00f3 l\u00e0 t\u00ecnh tr\u1ea1ng b\u1ea5t th\u01b0\u1eddng, c\u00f3 th\u1ec3 g\u00e2y ra m\u1ed9t lo\u1ea1t nh\u1eefng h\u1ec7 l\u1ee5y cho thai nhi\u00ed.<\/p>\n\n\n\n T\u00f4i ti\u1ebfp t\u1ee5c ph\u00e1t hi\u1ec7n d\u00e2y r\u1ed1n c\u1ee7a em b\u00e9 cu\u1ed9n qu\u00e1 m\u1ee9c.<\/p>\n\n\n\n T\u00e0i li\u1ec7u y khoa l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u00e2y r\u1ed1n b\u1ecb cu\u1ed9n qu\u00e1 m\u1ee9c, do Berengarius m\u00f4 t\u1ea3, v\u00e0o n\u0103m 1521. Nh\u01b0ng ph\u1ea3i m\u00e3i n\u0103m 1954, Edmonds m\u1edbi d\u00f9ng thu\u1eadt ng\u1eef \u201cCh\u1ec9 s\u1ed1 xo\u1eafn – Index of twist\u201d \u0111\u1ec3 m\u00f4 t\u1ea3 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c n\u00e0y.<\/p>\n\n\n\n Trong th\u1ef1c t\u1ebf ch\u1eef \u201ctwist \u2013 xo\u1eafn\u201d l\u00e0 kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n D\u00e2y r\u1ed1n b\u1ecb xo\u1eafn (twisting of the umbilical cord) l\u00e0 m\u1ed9t t\u00ecnh hu\u1ed1ng tai n\u1ea1n d\u00e2y r\u1ed1n kh\u1ea9n c\u1ea5p, ngh\u0129a l\u00e0 d\u00e2y r\u1ed1n \u0111ang b\u00ecnh th\u01b0\u1eddng t\u1ef1 d\u01b0ng v\u00ec l\u00ed do n\u00e0o \u0111\u00f3 n\u00f3 b\u1ecb xo\u1eafn l\u1ea1i \u0111\u1ed9t ng\u1ed9t \u1edf m\u1ed9t v\u1ecb tr\u00ed, l\u00e0m cho ngu\u1ed1n c\u1ea5p m\u00e1u thai nhi b\u1ecb ch\u1eb7n l\u1ea1i, d\u1eabn \u0111\u1ebfn thai b\u1ecb ch\u1ebft.<\/p>\n\n\n\n B\u00e0i vi\u1ebft n\u00e0y t\u00f4i kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u00e2y r\u1ed1n b\u1ecb xo\u1eafn.<\/p>\n\n\n\n N\u0103m 1994, Jr Strong \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t thu\u1eadt ng\u1eef thay th\u1ebf \u201cCh\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n – Umbilical coil index\u201d vi\u1ebft t\u1eaft l\u00e0 UCI.<\/p>\n\n\n\n Nh\u01b0 v\u1eady, v\u1ec1 m\u1eb7t thu\u1eadt ng\u1eef t\u00f4i c\u00f3 quan \u0111i\u1ec3m kh\u00f4ng d\u00f9ng ch\u1eef \u201cxo\u1eafn \u2013 twist\u201d trong tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y, m\u00e0 \u0111\u1ec1 xu\u1ea5t c\u1ee7a t\u00f4i l\u00e0:<\/p>\n\n\n\n Ti\u00eau ch\u00ed \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n x\u00e1c \u0111\u1ecbnh d\u00e2y r\u1ed1n cu\u1ed9n \u00edt, ho\u1eb7c d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c, b\u1eaft bu\u1ed9c ph\u1ea3i d\u1ef1a v\u00e0o ch\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n (UCI).<\/p>\n\n\n\n N\u0103m 1995, Degani S \u0111\u00e3 \u0111\u01b0a ra c\u00e1ch t\u00ednh ch\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n UCI. Theo \u0111\u00f3, UCI l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a s\u1ed1 \u0111o chi\u1ec1u dai m\u1ed9t cu\u1ed9n d\u00e2y r\u1ed1n t\u00ednh b\u1eb1ng cm.<\/p>\n\n\n\n UCI = 1\/d<\/p>\n\n\n\n Theo t\u00f4i, c\u00e1ch t\u00ednh n\u00e0y s\u00e1ng s\u1ee7a v\u1ec1 m\u1eb7t ng\u1eef ngh\u0129a, nh\u01b0ng r\u00f5 r\u00e0ng ph\u00e9p \u0111o chi\u1ec1u d\u00e0i c\u1ee7a 1 cu\u1ed9n s\u1ebd c\u00f3 \u0111\u1ed9 l\u1ec7ch l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi ph\u00e9p \u0111o trung b\u00ecnh c\u1ed9ng.<\/p>\n\n\n\n B\u1edfi v\u1eady, t\u00f4i \u0111\u1ec1 xu\u1ea5t c\u00e1ch do UCI l\u00e0 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n chia cho chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c cu\u1ed9n d\u00e2y r\u1ed1n \u0111\u00f3, v\u1ec1 b\u1ea3n ch\u1ea5t gi\u1ed1ng h\u1ec7t Degani.<\/p>\n\n\n\n Thai nhi 3 th\u00e1ng cu\u1ed1i d\u00e2y r\u1ed1n \u1ed5n \u0111\u1ecbnh, tai bi\u1ebfn c\u0169ng hay x\u1ea3y ra trong th\u1eddi k\u00ec n\u00e0y. Tuy nhi\u00ean, si\u00eau \u00e2m c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm h\u01a1 \u1edf tu\u1ea7n th\u1ee9 22.<\/p>\n\n\n\n UCI < 0,15 l\u00e0 d\u00e2y r\u1ed1n cu\u1ed9n \u00edt. Ng\u01b0\u1eddi ph\u1ee5 n\u1eef nh\u1edd t\u00f4i si\u00eau \u00e2m, th\u1eadt bu\u1ed3n, ch\u1ec9 s\u1ed1 cu\u1ed9n d\u00e2y r\u1ed1n UCI = 0,45 n\u00ean to\u00e0n b\u1ed9 d\u00e2y r\u1ed1n h\u00ecnh d\u00e2y th\u1eebng, n\u00f3 b\u1ecb r\u00fat ng\u1eafn l\u1ea1i, c\u0103ng ra. Th\u1eddi \u0111i\u1ec3m t\u00f4i si\u00eau \u00e2m \u0111\u00e3 th\u1ea5y t\u1ea1i v\u1ecb tr\u00ed b\u00e1nh rau b\u1eaft \u0111\u1ea7u c\u00f3 d\u1ea5u hi\u1ec7u b\u1ecb bong, \u0111\u00e2y l\u00e0 \u0111i\u1ec3m y\u1ebfu d\u1ec5 g\u00e2y \u0111\u1ee9t d\u00e2y r\u1ed1n n\u00ean khi si\u00eau \u00e2m d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c ph\u1ea3i r\u1ea5t ch\u00fa \u00fd, c\u1ea3 ch\u1ed7 d\u00e2y r\u1ed1n b\u00e1m v\u00e0o b\u1ee5ng thai nhi c\u0169ng d\u1ec5 b\u1ecb \u0111\u1ee9t.<\/p>\n\n\n\n C\u00f3 4 ki\u1ec3u d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c: nh\u1ea5p nh\u00f4, d\u00e2y th\u1eebng, ph\u00e2n \u0111o\u1ea1n v\u00e0 li\u00ean k\u1ebft, m\u1ed7i ki\u1ec3u \u0111\u1ec1u c\u00f3 c\u00e1c v\u1ebft l\u00f5m s\u00e2u d\u1ea7n v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh d\u00e2y r\u1ea5t \u0111\u1eb7c tr\u01b0ng; m\u1ed7i ki\u1ec3u l\u1ea1i g\u00e2y ra nh\u1eefng h\u1ec7 l\u1ee5y kh\u00e1c nhau.<\/p>\n\n\n\n V\u00ed d\u1ee5 b\u00e0 m\u1eb9 m\u00e0 t\u00f4i \u0111ang k\u1ec3, th\u1eadt kh\u00f4ng may, d\u00e2y r\u1ed1n cu\u1ed9n ch\u1eb7t nh\u01b0 chi\u1ebfc th\u1eebng, n\u00f3 l\u1ea1i cu\u1ed1n quanh c\u1ed5 l\u00e0m cho b\u00e0o thai b\u1ecb th\u1eaft c\u1ed5 tr\u00ean ch\u00ednh d\u00e2y r\u1ed1n c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n Thai nhi b\u1ecb ch\u1ebft l\u01b0u ch\u1ec9 sau \u0111\u00f3 v\u00e0i ng\u00e0y.<\/p>\n\n\n\n D\u00e2y r\u1ed1n l\u00e0 s\u1ef1 k\u1ebft n\u1ed1i gi\u1eefa thai nhi v\u1edbi qu\u00e1 kh\u1ee9, hi\u1ec7n t\u1ea1i v\u00e0 t\u01b0\u01a1ng lai. Khi \u0111\u1ee9a tr\u1ebb sinh ra, d\u00e2y r\u1ed1n b\u1ecb c\u1eaft \u0111\u1ee9t kh\u1ecfi c\u01a1 th\u1ec3 ng\u01b0\u1eddi m\u1eb9, h\u00e0i nhi b\u1eaft \u0111\u1ea7u m\u1ed9t cu\u1ed9c s\u1ed1ng t\u1ef1 sinh v\u00e0 t\u1ef1 tho\u00e1i h\u00f3a.<\/p>\n\n\n\n Si\u00eau \u00e2m d\u00e2y r\u1ed1n c\u00f2n r\u1ea5t nhi\u1ec1u v\u1ea5n \u0111\u1ec1, nh\u01b0ng kh\u00f4ng h\u1ec1 kh\u00f3, c\u00e1c \u0111\u1ed3ng nghi\u1ec7p c\u1ee7a t\u00f4i \u1edf m\u1ecdi n\u01a1i \u0111\u1ec1u l\u00e0m r\u1ea5t t\u1ed1t, th\u1eadm ch\u00ed l\u00e0m t\u1ed1t h\u01a1n t\u00f4i r\u1ea5t nhi\u1ec1u.<\/p>\n\n\n\n B\u1ea3n th\u00e2n t\u00f4i th\u1eddi ph\u1ed5 th\u00f4ng kh\u00f4ng c\u00f3 \u00fd \u0111\u1ecbnh l\u00e0m b\u00e1c s\u0129, nh\u1eefng ng\u01b0\u1eddi trong x\u00f3m khuy\u00ean t\u00f4i \u1edf nh\u00e0 \u0111i c\u00e0y, t\u00f4i \u0111\u00e3 ch\u1ecdn cho m\u00ecnh con \u0111\u01b0\u1eddng l\u00e0m ru\u1ed9ng. Nh\u01b0ng v\u00ec s\u1ee9c kh\u1ecfe c\u1ee7a t\u00f4i th\u1eddi \u0111i\u1ec3m \u0111\u00f3 qu\u00e1 y\u1ebfu, sau khi th\u1eed nhi\u1ec1u c\u00f4ng vi\u1ec7c ch\u00e2n tay nh\u01b0ng kh\u00f4ng l\u00e0m n\u1ed5i, cu\u1ed1i c\u00f9ng t\u00f4i ph\u1ea3i \u0111i h\u1ecdc ngh\u1ec1 b\u00e1c s\u0129. \u0110\u00f4i khi c\u00f4ng vi\u1ec7c l\u00e0 duy\u00ean s\u1ed1, l\u00e0m nhi\u1ec1u c\u00f3 ch\u00fat kinh nghi\u1ec7m, n\u00ean t\u00f4i xin ch\u00e9p ra \u0111\u00e2y \u0111\u1ec3 c\u00e1c b\u1ea1n \u0111\u1ecdc cho vui, m\u1ed9t s\u1ed1 b\u1ea1n tr\u1ebb m\u1edbi v\u00e0o ngh\u1ec1 tham kh\u1ea3o th\u00eam.<\/p>\n\n\n\n T\u00f4i xin \u0111\u01b0\u1ee3c nh\u1eafc l\u1ea1i b\u00e0i vi\u1ebft ch\u1ec9 l\u00e0 k\u1ec9 ni\u1ec7m c\u00e1 nh\u00e2n t\u00f4i, kh\u00f4ng ph\u1ea3i l\u00e0 ki\u1ebfn th\u1ee9c y khoa kinh \u0111i\u1ec3n \u0111\u1ec3 khuy\u1ebfn c\u00e1o, n\u00ean ch\u1ec9 c\u00f3 gi\u00e1 tr\u1ecb tham kh\u1ea3o.<\/p>\n\n\n\n Xin tr\u00e2n tr\u1ecdng c\u00e1m \u01a1n!<\/p>\n","protected":false},"excerpt":{"rendered":" B\u00e0i vi\u1ebft g\u1ed1c tr\u00ean fb c\u1ee7a bs Tr\u1ea7n V\u0103n Ph\u00fac V\u00ec sao b\u00e0i vi\u1ebft n\u00e0y c\u00f3 \u1edf \u0111\u00e2y: V\u00ec c\u00e1c b\u00e0i vi\u1ebft tr\u00ean facebook tr\u00f4i<\/p>\n","protected":false},"author":1,"featured_media":1076,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,5,84],"tags":[85],"class_list":["post-1072","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-khong-phan-loai","category-sieu-am","category-thai","tag-day-ron"],"_links":{"self":[{"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/posts\/1072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/comments?post=1072"}],"version-history":[{"count":15,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/posts\/1072\/revisions"}],"predecessor-version":[{"id":1091,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/posts\/1072\/revisions\/1091"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/media\/1076"}],"wp:attachment":[{"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/media?parent=1072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/categories?post=1072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cdha.edu.vn\/cdha\/wp-json\/wp\/v2\/tags?post=1072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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UCI t\u1eeb 0,15 \u2013 0,33 l\u00e0 d\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng.
UCI > 0,33 l\u00e0 d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c.<\/li>\n<\/ol>\n\n\n\n
\n\n\n\n![\"\ud83c\udf41\"](\"https:\/\/static.xx.fbcdn.net\/images\/emoji.php\/v9\/ta7\/2\/16\/1f341.png\")
<\/p>\n\n\n\n![\"\ud83d\udc49\"](\"https:\/\/static.xx.fbcdn.net\/images\/emoji.php\/v9\/tf0\/2\/16\/1f449.png\")
Hypocoiled umbilical cord = d\u00e2y r\u1ed1n cu\u1ed9n \u00edt. Hypercoled umbilical cord = d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c.<\/p>\n\n\n\n![\"\ud83c\udf40\"](\"https:\/\/static.xx.fbcdn.net\/images\/emoji.php\/v9\/t26\/2\/16\/1f340.png\")
\u00a0CH\u1ec8 S\u1ed0 CU\u1ed8N D\u00c2Y R\u1ed0N (UCI)<\/em><\/strong><\/p>\n\n\n\n\u00a0K\u0129 thu\u1eadt si\u00eau \u00e2m<\/em><\/strong>: Ch\u1ecdn \u0111o\u1ea1n d\u00e2y r\u1ed1n th\u1eb3ng nh\u1ea5t, quan s\u00e1t r\u00f5 nh\u1ea5t, l\u00e1t c\u1eaft d\u1ecdc theo d\u00e2y r\u1ed1n, n\u1ebfu \u0111\u01b0\u1eddng k\u00ednh t\u0129nh m\u1ea1ch r\u1ed1n v\u00e0 \u0111\u1ed9ng m\u1ea1ch r\u1ed1n kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t th\u00ec b\u1eaft bu\u1ed9c ph\u1ea3i ph\u1ed5 Doppler m\u00e0u.<\/p>\n\n\n\n\u00a0C\u00e1ch \u0111o:<\/em><\/strong> Ch\u1ecdn c\u00e1c v\u00f2ng tr\u00f2n l\u00e0 t\u0129nh m\u1ea1ch r\u1ed1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n, ho\u1eb7c t\u0129nh m\u1ea1ch c\u00f3 m\u1ed9t m\u00e0u kh\u00e1c bi\u1ec7t so v\u1edbi 2 \u0111\u1ed9ng m\u1ea1ch c\u00f3 chung m\u00e0u, \u0111\u00e1nh d\u1ea5u v\u00e0o \u0111i\u1ec3m gi\u1eefa m\u1ed7i t\u0129nh m\u1ea1ch, nh\u01b0 trong \u1ea3nh t\u00f4i \u0111\u00e3 \u0111\u00e1nh d\u1ea5u, sau \u0111\u00f3 ch\u1ec9 vi\u1ec7c \u0111o chi\u1ec1u d\u00e0i d c\u1ee7a s\u1ed1 cu\u1ed9n n.<\/p>\n\n\n\n UCI = n\/d<\/p>\n\n\n\n<\/p>\n\n\n\n
UCI t\u1eeb 0,15 \u2013 0,33 l\u00e0 d\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng.
UCI > 0,33 l\u00e0 d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c.<\/p>\n\n\n\n<\/p>\n\n\n\n<\/p>\n\n\n\n Hypocoiled umbilical cord = d\u00e2y r\u1ed1n cu\u1ed9n \u00edt. Hypercoled umbilical cord = \u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c.<\/p>\n\n\n\n CH\u1ec8 S\u1ed0 CU\u1ed8N D\u00c2Y R\u1ed0N (UCI)<\/p>\n\n\n\n K\u0129 thu\u1eadt si\u00eau \u00e2m: Ch\u1ecdn \u0111o\u1ea1n d\u00e2y r\u1ed1n th\u1eb3ng nh\u1ea5t, quan s\u00e1t r\u00f5 nh\u1ea5t, l\u00e1t c\u1eaft d\u1ecdc theo d\u00e2y r\u1ed1n, n\u1ebfu \u0111\u01b0\u1eddng k\u00ednh t\u0129nh m\u1ea1ch r\u1ed1n v\u00e0 \u0111\u1ed9ng m\u1ea1ch r\u1ed1n kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t th\u00ec b\u1eaft bu\u1ed9c ph\u1ea3i ph\u1ed5 Doppler m\u00e0u.<\/p>\n\n\n\n C\u00e1ch \u0111o: Ch\u1ecdn c\u00e1c v\u00f2ng tr\u00f2n l\u00e0 t\u0129nh m\u1ea1ch r\u1ed1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n, ho\u1eb7c t\u0129nh m\u1ea1ch c\u00f3 m\u1ed9t m\u00e0u kh\u00e1c bi\u1ec7t so v\u1edbi 2 \u0111\u1ed9ng m\u1ea1ch c\u00f3 chung m\u00e0u, \u0111\u00e1nh d\u1ea5u v\u00e0o \u0111i\u1ec3m gi\u1eefa m\u1ed7i t\u0129nh m\u1ea1ch, nh\u01b0 trong \u1ea3nh t\u00f4i \u0111\u00e3 \u0111\u00e1nh d\u1ea5u, sau \u0111\u00f3 ch\u1ec9 vi\u1ec7c \u0111o chi\u1ec1u d\u00e0i d c\u1ee7a s\u1ed1 cu\u1ed9n n.<\/p>\n\n\n\n UCI = n\/d<\/p>\n\n\n\n<\/p>\n\n\n\n
UCI t\u1eeb 0,15 \u2013 0,33 l\u00e0 d\u00e2y r\u1ed1n b\u00ecnh th\u01b0\u1eddng.
UCI > 0,33 l\u00e0 d\u00e2y r\u1ed1n cu\u1ed9n qu\u00e1 m\u1ee9c.<\/p>\n\n\n\n K\u1ebeT LU\u1eacN<\/p>\n\n\n\n