Lub fetal umbilical artery Doppler (UAD) pulsatility index (PI) ntsuas ua tus cim surrogate rau kev noj qab nyob zoo ntawm tus me nyuam hauv plab los ntawm kev ntsuas impedance nyob rau hauv lub feto-placental ncig thiab yog ib qho kev ntsuas tsis ncaj ntawm kev tiv thaiv kom ntws mus rau hauv lub placental vasculature.
Umbilical artery PI yog dab tsi?
Xav txog tag nrho 2nd thiab 3rd trimesters qhov nruab nrab PI tus nqi ntawm cov hlab ntsha hauv plab yog 1.24 (SD +/- 0.27). Thaum txiav txim siab gestational nyob rau hauv nyias trimesters, txoj kev tshawb fawb pom tias tus nqi ntawm PI nyob rau hauv 2nd trimester yog 1.33 (SD +/- 0.29) thiab nyob rau hauv 3rd trimester PI yog 1.18 (SD +/- 0.25).
umbilical artery pulsatility index txhais li cas?
Pulsatility Performance index (PI)=(systolic tshaj tawm - diastolic tshaj tawm / txhais tau tias tshaj tawm) Nyob rau hauv lub cev ib txwm muaj, qhov tsis kam ntws (impedance) txo qis hauv cov hlab ntsha hauv plab vim yog nce tus naj npawb ntawm tertiary qia villi raws li cov placenta matures.
Pulsatility Performance index yog dab tsi?
Pulsatility Index (PI) txhais tau tias yog qhov sib txawv ntawm qhov siab tshaj systolic thiab enddiastolic ntws nrawm, muab faib los ntawm lub sijhawm nruab nrab ntws nrawm.
PIB li qub thaum cev xeeb tub yog dab tsi?
Qhov nruab nrab PI nyob rau sab xis thiab sab laug uterine hlab ntsha yog 1.09 thiab 0.81, nrog rau thaj tsam ntawm 0.53 - 1.58 thiab 0.58 - 1.83 raws. RI muaj qhov nruab nrab ntawm 0.59 thiab 0.65, thaum qhov ntau yog0.37-1.16 thiab 0.41 - 0.82 nyob rau hauv ob sab xis thiab sab laug uterine hlab ntsha feem.
