Qhov hnyav ntawm tus me nyuam hauv plab yog qhov tseem ceeb ntawm qhov ntsuas seb yuav ua li cas yog tias tus me nyuam tuaj yeem tsim kom zoo, siab thiab nquag. Nws yog qhov hnyav ntawm tus me nyuam, uas cov kws kho mob ua ke nrog lwm cov yeeb yam, xws li qhov siab, tsis muaj qhov ntu ntawm tus neeg lub cev, kev tsis sib haum xeeb , uas ua rau nws txiav txim siab tam sim no lub cev xeeb tub hauv lub sijhawm. Los ntawm txoj kev uas tus me nyuam tuaj yeem hnyav rau lub lis piam, tus kws kho mob muaj cuab kav txiav txim rau qhov kev loj hlob ntawm tus me nyuam, thiab seb nws puas tuaj yeem tshwm sim los ntawm lwm yam.
Piv txwv, yog tias tus me nyuam tuaj yeem ua rau hnyav los ntawm lub lim piam yav tom ntej, ces qhov no yuav yog ib qho kev tshaib plab, ob qho pa thiab zaub mov noj. Oxygen starvation tuaj yeem ua tau rau tus menyuam yog tias tus poj niam haus luam yeeb lossis haus thaum cev xeeb tub. Kev tshaib nqhis noj zaub mov tuaj yeem hla tus menyuam vim yog qhov tsis zoo ntawm cov khoom noj uas yuav tsum tau muaj kev sib txawv. Tsis muaj qhov hnyav tuaj yeem piav qhia txog kev loj hlob ntawm kev loj hlob ntawm tus me nyuam hauv plab thiab txawm tias lub cev xeeb tub .
Tib yam siv rau ntau tshaj qhov hnyav, uas tshwm sim los ntawm qee qhov txawv txav lossis kev mob hauv kev loj hlob ntawm tus menyuam. Qhov tseeb, txhua tus poj niam thiab nws tus me nyuam yav tom ntej muaj ib tus qauv ntawm lub cev, yog li koj muab tsis tau rau txhua leej txhua tus nyob hauv ib lub bar.
Tus menyuam yuav tsum hnyav npaum li cas txhua lub lim tiam?
Txhawm rau txhawm rau taug kev thaum cev xeeb tub thiab saib xyuas tus me nyuam, nws muaj qee yam ntawm qhov hnyav ntawm lub fetus rau lub lis piam. Feem ntau, tag nrho qhov hnyav ntawm lub fetus yog kev soj ntsuam los ntawm ultrasound xeem, uas yog ib txoj kev txhim khu kev qha nrog cov lus siab tshaj plaws. Tab sis ultrasound tsuas ua tau li ob peb zaug thaum lub sij hawm tag nrho lub sij hawm ntawm cev xeeb tub, yog li cov kws kho mob txiav txim siab qhov hnyav ntawm lub fetus "ntawm qhov muag", ntsuas qhov siab ntawm qhov chaw ntawm lub tsev menyuam thiab ntsuas tag nrho qhov ncig ntawm lub plab.
Txhawm rau kom tsis tau poob ntawm kev txiav txim siab, ntau npaum li cas tus me nyuam yuav tsum kwv yees thaum lub caij cev xeeb tub, muaj ib qho tshwj xeeb ntawm qhov hnyav ntawm lub fetus rau lub lis piam:
| Cev xeeb tub, lub lim tiam | Cev nqaij daim tawv hnyav, g | Fetal ntev, hli | Cev xeeb tub, lub lim tiam | Cev nqaij daim tawv hnyav, g | Fetal ntev, hli |
| 8th | 1 | 1.6 | 25 | 660 | 34.6 |
| 9th | 2 | 2.3 | 26th | 760 | 35.6 |
| 10 | 4 | 3.1 | 27th | 875 | 36.6 |
| 11th | 7th | 4.1 | 28 | 1005 | 37.6 |
| 12th | 14th | 5.4 | 29 | 1153 | 38.6 |
| 13th | 23 | 7.4 | 30 | 1319 | 39,9 |
| 14th | 43 | 8.7 | 31 | 1502 | 41.1 |
| 15th | 70 | 10.1 | 32 | 1702 | 42.4 |
| 16 | 100 | 11.6 | 33 | 1918 | 43.7 |
| 17th | 140 | 13th | 34 | Xyoo 2146 | 45 |
| 18th | 190 | 14.2 | 35 | 2383 | 46.2 |
| 19 | 240 | 15.3 | 36 | 2622 | 47.4 |
| 20 | 300 | 16.4 | 37 | 2859 | 48.6 |
| 21 | 360 | 26.7 | 38 | 3083 | 49.8 |
| 22 | 430 | 27.8 | 39 | 3288 | 50.7 |
| 23 | 501 | 28.9 | 40 | 3462 | 51.2 |
| 24 | 600 | 30 | 41 | 3597 | 51.7 |
Tab sis nws yog tsim nyog nco ntsoov tias qhov ntsuas no tsis yog qhov tseeb, tab sis tsuas qhia tau. Yog li, thaum kev soj ntsuam lub xeev tus me nyuam, nws tsis tsim nyog txiav txim siab sai. Tsis tas li ntawd, xws li daim ntawv ntsuam xyuas yuav tsum ua los ntawm ib tus kws tsim tshwj xeeb.
Feem ntau tus menyuam thaum yug los ntawm 3, 1 kg mus rau 3, 6 kg. Tab sis muaj cov me nyuam thiab nrog ntau qhov hnyav, vim hais tias tus qauv ntawm tus me nyuam muaj kev cuam tshuam los ntawm ntau yam:
- qhov sib deev ntawm tus menyuam;
- kev noj qab haus huv, kev noj qab haus huv thiab kev muaj mob ntawm tus poj niam cev xeeb tub;
- tau pathologies thaum cev xeeb tub;
- cov menyuam nyob hauv plab.
Lub plab hnyuv tom qab lub lim tiam thib ob ntawm cev xeeb tub
Ua ntej 20 lub lim tiam, qhov hnyav ntawm tus me nyuam hauv plab yog tsis loj heev thiab nws maj mam sau. Tab sis twb nyob ntawm 20 lub lim piam qhov ceeb thawj ntawm cov txiv hmab txiv ntoo yog 300 grams, thiab nyob rau ntawm 30 lub lis piam tus me nyuam hnyav tag nrho hnyav dua. Qhov no yog qhov zoo tagnrho, tabsis yog tias qhov kev zoo no nce siab tsis pom, ces nws tsim nyog ua tib zoo saib xyuas qhov no thiab nrhiav tau qhov laj thawj ntawm qhov tsis zoo ntawm tus menyuam. Nyob rau ntawm lub lim tiam 38th ntawm cev xeeb tub, qhov hnyav ntawm lub fetus yuav tsum tsawg kawg los yog ze rau peb kilograms, uas qhia qhov kev loj hlob ntawm tus me nyuam thiab nws txoj kev npaj rau hnub yug.