Ultrasound muaj nyob hauv txheej txheem kev tshawb fawb thaum cev xeeb tub. Ultrasound yog npaj thiab tsis tau npaj, tus tswv yim npaj muaj ib hnub twg meej hnub kawg thiab kuaj xyuas seb puas muaj kev txhim kho ntawm lub cev thiab kev mob caj ces. Tus thawj ultrasound yog ua tiav thaum 9-11 lub lis piam, qhov thib ob ntawm 19-23, thiab qhov kawg ultrasound thaum cev xeeb tub yog nyob ntawm 32-34 lub lis piam.
Vim li cas kev coj ultrasound trimester ntawm cev xeeb tub?
Qhov thib peb npaj lub sijhawm thaum cev xeeb tub yog siv rau cov hom phiaj nram qab no:
- txhawm rau txheeb xyuas cov vaj tse thiab thaj chaw ntawm lub tsho me nyuam (tshem tawm ntawm plas meej tsis muaj plab);
- nrog rau lub hom phiaj ntawm lub cev muaj zog ntawm tus me nyuam hauv plab (kom tshem qoob lag luam hauv kev loj hlob) thiab nws qhov chaw nyob hauv cov kab noj hniav ntawm lub tsev menyuam (lub taub hau, pelvic, tus ntoo khaub lig);
- kom ntsuas cov me nyuam hauv plab biometrics (ntsuas qhov ncig ntawm lub taub hau, lub duav thiab lub plab), txiav txim siab txog qhov fetal loj npaum li cas rau lub sij hawm cev xeeb tub.
Tus me nyuam puas pom ultrasound hauv peb lub hlis thib peb ntawm cev xeeb tub?
Nyob rau ultrasound ntawm fetus rau 30 lub lis piam, nws yuav pom tau hais tias daim tawv nqaij yog tsis wrinkled, tab sis tus. Qhov hnyav ntawm tus menyuam yog 1400 grams, thiab qhov siab yog 40 cm.
Thaum lub sij hawm ultrasound tom qab 32 lub lim piam tas, koj pom tau tias qhov hnyav ntawm lub fetus yog 1900 gram, thiab qhov siab yog 42 cm Tus me nyuam twb zoo ib yam li ib tug txiv neej me, nws muaj tag nrho cov kabmob tsim, thaum ultrasound koj tuaj yeem pom nws mov (ntiv tes xoo, thawb nrog leeg thiab ceg). Thaum nqa tawm ultrasound hauv 3D thiab 4D, koj tuaj yeem pom tus menyuam lub qhov muag.
Kev ntsuam xyuas ntawm fetal biometry ntawm 32 lub lis piam gestation:
- biparietal loj nyob rau hauv lub sij hawm no yog sib npaug rau 75-89 hli;
- frontal-occipital loj los ntawm ultrasound yog 95-113 hli;
- lub circumference ntawm lub taub hau plab yog feem ntau 283-325 hli;
- Lub npuav ntawm tus menyuam lub plab hauv lub lim tiam 32 yog 258-314 hli.
Thaum ntsuas cov pob txha ntev, cov ntsiab lus nram qab no tau nquag tau:
- qhov ntev ntawm lub femur yog 56-66 cm;
- ntev ntawm humerus - 52-62 cm;
- qhov ntev ntawm cov pob txha ntawm qhov forearm yog 45-53 cm;
- qhov ntev ntawm lub pob txha ci yog 52-60 cm.
Nyob rau ntawm ultrasound ntawm 33 lub lim piam ntawm cev xeeb tub, koj pom tau tias qhov hnyav ntawm tus me nyuam nce 100 grams thiab twb yog 2 kg, thiab kev loj hlob yog 44 cm.
Ua tsaug rau ultrasound, koj tuaj yeem pom tau tias thaum pib ntawm peb lub hlis peb ntawm cev xeeb tub, tus me nyuam twb pib ua tiav lawm thiab hauv lub hlis tom qab nws tsuas yuav loj hlob thiab nce nyhav. Yog li ntawd, nyob rau hauv peb lub hlis peb, nws tseem ceeb heev tias yav tom ntej niam yuav tsum noj plab thiab tsis txhob haus hmoov thiab qab zib.
Nqa tawm ntawm peb sab ultrasound thaum cev xeeb tub yuav tsim ib doppler, thiaj li ntsuam xyuas cov ntshav ntws ntawm cov hlab ntsha ntawm txoj hlab ntaws. Thaum muaj qhov txawv txav, nws yuav tsum coj doplerometry ntawm cov hlab ntsha ntxiv (nruab nrab cerebral artery, uterine arteries, aorta ntawm fetus).
Ultrasound thaum cev xeeb tub
Ultrasound tom qab 34 lub lim piam yog tsis tau npaj thiab yog ua raws li qhov qhia tau. Yog hais tias ib tug poj niam pib pom zoo heev dhau los ntawm tus me nyuam hauv plab, dhau los tsis muaj zog lossis txawm nres tsis hnov lus zoo. Lwm yam tseem ceeb rau ultrasound hauv plab thaum cev xeeb tub yog qhov muaj qhov mob me ntsis los ntawm qhov chaw mos
Raws li peb pom, ultrasound thaum lub hli 32 ntawm kev xeeb tub yog ib qho tseem ceeb tshawb xyuas kev tshawb nrhiav uas tso cai rau tshawb nrhiav qhov chaw ntawm lub tsho me nyuam nyob rau lub sij hawm, thiab soj ntsuam kev loj hlob ntawm fetus (siv biometrics) thiab nws ua raws li lub caij nyoog gestation. Nyob rau ntawm ultrasound nyob rau hauv peb lub hlis hnub thib plaub, nws yog ib qho yuav tsum tau ua ib qho umbilical artery doppler.