pulsatility index

Also found in: Acronyms.

pul·sa·til·i·ty in·dex

calculation of Doppler measurements of systolic and diastolic velocities in the uterine, umbilical, or fetal circulations.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
In low-risk populations, several combinations, including PP13, PAPP-A, a disintegrin and metalloproteinase 12 (ADAM12), activin A, or inhibin A measured early in first or early second trimester combined with uterine artery Doppler (pulsatility index or resistance index and/or presence of a notch) showed reasonable accuracy (sensitivity 60%-80% for specificity >80%).
On 2-D-PCD, the Resistance Index (RI=(PSVEDV)/PSV=(peak systolic velocity-end diastolic velocity)/peak systolic velocity), the Pulsatility Index (PI=(peak systolic velocity-end diastolic velocity)/mean velocity=(PSV-EDV)/TAV), the systolic/diastolic ratio S/D (systolicvelocity/ diastolic velocity) were calculated on three consecutive wave forms which were used to evaluate uterine artery resistance.
KEYWORD: Polycystic ovarian syndrome Cabergoline Uterine artery resistance Resistance Index Pulsatility Index.
Uterine artery pulsatility index was measured in the right and left uterine artery near the cross-over with the external iliac artery, and the mean value was calculated.
The study involved calculating the mean flow measurements for each coronary system as well as the Pulsatility Index. The study also collected data on the prevalence of suboptimal results.
(12) The resistive index (RI) and pulsatility index (PI) have been used in the evaluation of ovarian masses because of the expected low impedance and high diastolic blood flow seen in blood vessels supplying the malignant tumor.
Researchers also examined the effect of adding in the biomarkers of uterine artery pulsatility index and serum placental growth factor, and found this detected 82.4% of preterm preeclampsia.
Normal Values of Mesenteric Arterial Blood Flow Doppler Celiac Trunk SMA IMA Para- meters PSV 90-190 80-200 90-140 EDV 30-65 -- 0-10 RI -- 0.8-0.85 >0.9 PI 1.5 [+ or -] 0.02 2.6-4.8 >3.5 D 0.78 [+ or -] 0.08 0.8 [+ or -] 0.07 0.4 [+ or -] 0.03 BF -- 380-640 80-130 PSV: Peak systolic velocity (cm/s); EDV: End diastolic velocity (cm/s); RI: Resistive index; PI: Pulsatility index; D: Diameter (cm); BF: Arterial blood flow (mL/min) Table 2.
An increased value of the resistive index (RI = [peak systolic velocity - end diastolic velocity]/peak systolic velocity) or the pulsatility index (PI = [peak systolic velocity - end diastolic velocity]/time averaged velocity) measured at the level of the interlobar arteries is associated with increased severity and duration of hypertension [11, 12].
Results: In the VFCA group, corrected resistive index (cRI) increased from 0.47 [+ or -] 0.03 to 0.64 [+ or -] 0.06, and pulsatility index (PI) decreased from 0.82 [+ or -] 0.03 to 0.68 [+ or -] 0.04 after ROSC.
Color and power Doppler is used to know the pattern of vascularity and doppler indices [resistive index (RI) and pulsatility index (PI)].