\u00d4 nhi\u1ec5m s\u00f3ng \u0111i\u1ec7n t\u1eeb \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ef1 nguy hi\u1ec3m kh\u00f4ng nh\u00ecn th\u1ea5y. N\u00f3i chung vi s\u00f3ng ch\u1ec9 d\u00f9ng \u1edf b\u01b0\u1edbc s\u00f3ng h\u1ea1n ch\u1ebf l\u1edbn h\u01a1n 0,536 cm, t\u1ea7n s\u1ed1 th\u1ea5p h\u01a1n 3.1011 Hz. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u1ea1t vi s\u00f3ng n\u00f3i chung n\u1eb1m trong m\u1ee9c 4.10-4 \u2013 1.2.10-9 \u0111i\u1ec7n t\u1eed v\u00f4n.<\/p>\n\n\n\n
Khi s\u00f3ng vi ba t\u00e1c d\u1ee5ng v\u00e0o c\u01a1 th\u1ec3 m\u1ed9t ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng b\u1ecb ph\u1ea3n x\u1ea1 m\u1ea5t, c\u00f2n m\u1ed9t ph\u1ea7n b\u1ecb h\u1ea5p thu chuy\u1ec3n h\u00f3a th\u00e0nh \u0111\u1ed9ng n\u0103ng c\u1ee7a c\u00e1c ph\u00e2n t\u1eed trong c\u01a1 th\u1ec3, khi\u1ebfn cho c\u00e1c ph\u00e2n t\u1eed chuy\u1ec3n \u0111\u1ed9ng t\u0103ng l\u00ean, t\u1eeb \u0111\u00f3 m\u00e0 s\u1ea3n sinh ra m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t ma s\u00e1t l\u1edbn, khi\u1ebfn cho nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u01a1 th\u1ec3 sinh v\u1eadt t\u0103ng l\u00ean. T\u00e1c d\u1ee5ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201chi\u1ec7u \u1ee9ng nhi\u1ec7t\u201d c\u1ee7a b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb, n\u00f3 l\u00e0 bi\u1ec3u hi\u1ec7n ch\u1ee7 y\u1ebfu c\u1ee7a \u00f4 nhi\u1ec5m b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb. L\u00f2 vi ba ch\u00ednh l\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf<\/a> tr\u00ean c\u01a1 s\u1edf nguy\u00ean l\u00ed \u201chi\u1ec7u \u1ee9ng nhi\u1ec7t\u201d n\u00e0y. Ch\u00fang c\u00f3 th\u1ec3 khi\u1ebfn cho b\u00ean trong th\u1ef1c ph\u1ea9m \u0111\u01b0\u1ee3c nhi\u1ec7t n\u1ea5u ch\u00edn, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 gia nhi\u1ec7t t\u1eeb ngo\u00e0i v\u00e0o trong nh\u01b0 \u0111un n\u1ea5u b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n C\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 \u0111\u1ed9ng v\u1eadt ch\u1ee9ng t\u1ecf, b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 \u0111\u1ebfn c\u01a1 th\u1ec3 sinh v\u1eadt ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c t\u1ed5 ch\u1ee9c c\u1ee7a c\u01a1 th\u1ec3 b\u1ecb \u0111\u1ed1t n\u00f3ng g\u00e2y n\u00ean t\u1ed5n th\u01b0\u01a1ng v\u00e0 l\u00e0m cho l\u01b0u th\u00f4ng m\u00e1u c\u0169ng b\u1ecb t\u1ed5n th\u01b0\u01a1ng nghi\u00eam tr\u1ecdng. Nguy\u00ean nh\u00e2n l\u00e0 v\u00ec nh\u1eefng t\u1ed5 ch\u1ee9c n\u00e0y sau khi bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t kh\u00f4ng d\u1ec5 d\u00e0ng truy\u1ec1n nhi\u1ec7t \u0111\u00f3 sang l\u01b0u th\u00f4ng m\u00e1u \u0111\u01b0\u1ee3c. S\u00f3ng vi ba \u0111\u1ed1i v\u1edbi tinh ho\u00e0n v\u00e0 tinh th\u1ec3 m\u1eaft c\u00f3 t\u00e1c h\u1ea1i r\u1ea5t l\u1edbn. Khi nhi\u1ec7t \u0111\u1ed9 tinh ho\u00e0n t\u0103ng qu\u00e1 10 oC \u2013 20 oC so v\u1edbi b\u00ecnh th\u01b0\u1eddng s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ecnh tr\u1ea1ng ph\u00e1t d\u1ee5c, tinh th\u1ec3 m\u1eaft khi b\u1ecb t\u0103ng nhi\u1ec7t s\u1ebd g\u00e2y ra m\u00e0ng tr\u1eafng. N\u0103m 1976, L\u1ea7u n\u0103m g\u00f3c (c\u01a1 quan B\u1ed9 Qu\u1ed1c ph\u00f2ng M\u1ef9) \u0111\u00e3 c\u00f3 th\u00f4ng b\u00e1o ch\u1ec9 r\u00f5: \u201cC\u01a1 th\u1ec3 n\u1ebfu ti\u1ebfp thu m\u1ed9t l\u01b0\u1ee3ng l\u1edbn s\u00f3ng vi ba s\u1ebd d\u1eabn \u0111\u1ebfn m\u1eafc b\u1ec7nh tim. C\u00e1c th\u00ed nghi\u1ec7m \u0111\u1ed1i v\u1edbi lo\u00e0i nh\u00e1i xanh ch\u1ee9ng t\u1ecf khi b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb \u0111\u1ed3ng b\u1ed9 v\u1edbi nh\u1ecbp tim s\u1ebd l\u00e0m cho tim ng\u1eebng \u0111\u1eadp\u201d. C\u00e1c nh\u00e0 khoa h\u1ecdc th\u00f4ng qua th\u00ed nghi\u1ec7m \u0111\u1ed9ng v\u1eadt v\u00e0 \u0111i\u1ec1u tra x\u00e3 h\u1ed9i r\u1ed9ng r\u00e3i \u0111\u00e3 \u0111i \u0111\u1ebfn k\u1ebft lu\u1eadn: \u00f4 nhi\u1ec5m s\u00f3ng vi ba r\u1ea5t d\u1ec5 d\u1eabn \u0111\u1ebfn c\u00e1c ch\u1ee9ng b\u1ec7nh v\u1ec1 m\u1eaft v\u00e0 b\u1ec7nh sinh d\u1ee5c. C\u00e1c c\u01a1 quan kh\u00e1c nh\u01b0 tim, n\u00e3o, m\u1ea1ch m\u00e1u n\u1ebfu b\u1ecb \u1ea3nh h\u01b0\u1edfng hi\u1ec7u \u1ee9ng nhi\u1ec7t n\u00e0y c\u0169ng s\u1ebd c\u00f3 nh\u1eefng b\u1ec7nh t\u01b0\u01a1ng \u1ee9ng x\u1ea3y ra.<\/p>\n\n\n\n Nh\u01b0ng n\u0103ng l\u01b0\u1ee3ng c\u1ee7a vi ba ph\u1ea3i kh\u00e1 l\u1edbn, th\u1eddi gian t\u00e1c d\u1ee5ng kh\u00e1 l\u00e2u m\u1edbi c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c ch\u1ee9ng b\u1ec7nh tr\u00ean. Tr\u1eeb nh\u1eefng nh\u00e2n vi\u00ean k\u0129 thu\u1eadt ra \u0111a ti\u1ebfp x\u00fac v\u1edbi vi ba c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 l\u1edbn v\u00e0 nh\u1eefng ng\u01b0\u1eddi l\u00e0m c\u00f4ng t\u00e1c vi ba ra, n\u00f3i chung r\u1ea5t \u00edt ng\u01b0\u1eddi b\u1ecb lo\u1ea1i b\u1ec7nh \u0111\u00f3. Trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y, ch\u00fang ta s\u1eed d\u1ee5ng l\u00f2 vi ba c\u00f3 m\u00e0ng ch\u1eafn kim lo\u1ea1i b\u1ea3o hi\u1ec3m \u1edf b\u00ean ngo\u00e0i. Khi s\u1eed d\u1ee5ng ch\u1ec9 c\u1ea7n \u0111\u00f3ng ch\u1eb7t c\u1eeda l\u00f2 th\u00ec vi ba kh\u00f4ng th\u1ec3 l\u1ecdt ra \u0111\u01b0\u1ee3c, do \u0111\u00f3 kh\u00f4ng c\u00f3 t\u00e1c h\u1ea1i \u0111\u1ed1i v\u1edbi c\u01a1 th\u1ec3. N\u1ebfu c\u1eeda l\u00f2 kh\u00f4ng \u0111\u00f3ng \u0111\u01b0\u1ee3c ch\u1eb7t ho\u1eb7c c\u00f3 khe h\u1edf th\u00ec ph\u1ea3i ng\u1eebng s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1eeda ch\u1eefa. N\u1ebfu l\u00f2 \u0111\u00e3 c\u0169 th\u00ec t\u1ed1t nh\u1ea5t l\u00e0 thay l\u00f2 m\u1edbi \u0111\u1ec3 tr\u00e1nh b\u1ecb r\u00f2 s\u00f3ng l\u00e0m h\u1ea1i \u0111\u1ebfn c\u01a1 th\u1ec3.<\/p>\n\n\n\n T\u1eeb kho\u00e1 : S\u00f3ng \u0111i\u1ec7n t\u1eeb; B\u1ee9c x\u1ea1; Hi\u1ec7u \u1ee9ng nhi\u1ec7t.<\/p>\n","protected":false},"excerpt":{"rendered":" \u00d4 nhi\u1ec5m s\u00f3ng \u0111i\u1ec7n t\u1eeb \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ef1 nguy hi\u1ec3m kh\u00f4ng nh\u00ecn th\u1ea5y. N\u00f3i chung vi s\u00f3ng ch\u1ec9 d\u00f9ng \u1edf b\u01b0\u1edbc s\u00f3ng h\u1ea1n ch\u1ebf l\u1edbn h\u01a1n 0,536 cm, t\u1ea7n s\u1ed1 th\u1ea5p h\u01a1n 3.1011 Hz. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u1ea1t vi s\u00f3ng n\u00f3i chung n\u1eb1m trong m\u1ee9c 4.10-4 \u2013 1.2.10-9 \u0111i\u1ec7n t\u1eed v\u00f4n. Khi s\u00f3ng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,17],"tags":[],"class_list":["post-9480","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-moi-truong"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9480"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9480\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}