EDAN DUS 60 - A3.11: Thd; A3.12: Estimated Fetal Weight; A3.13: FBP Criterion

DUS 60 Digital Ultrasonic Diagnostic Imaging System User Manual Obstetrical References
- 206 -
A3.11: THD
Hansmann:
MA（THD mm）=6.963496+3.829853*(THD/10)-0.443065*(THD/10)
2
+0.1010238*(THD/10)
3
-
0.0099702*(THD/10)
4
+ 0.0003773(THD/10)
5
A3.12: Estimated Fetal Weight
Merz E. Werner G. & llan E. T., 1991, Ultrasound in Gynecology and Obstetrics Textbook and Atlas
312, 326-336.
Hansmann M, Hackelöer B-J, Staudach A, Ultraschalldiagostik in Geburtshilfe und Gynäkologie 1995.
Campbell S, Wilkin D. “Ultrasonic Measurement if Fetal Abdomen Circumference in the Estimation of
Fetal Weight.” Br J Obstetrics and Gynecology September 82 (9):689-697, 1975.
Hadlock F, Harrist R, et al. Estimation of fetal weight with the use of head, body, and femur
measurement – a prospective study. American Journal of Obstetrics and Gynecology February 1, 151
(3): 333-337, 1985.
Shepard M, Richards V, Berkowitz R, Warsof S, Hobbins J. An Evaluation of Two Equations for
Predicting Fetal Weight by Ultrasound. American Journal of f Obstetrics and Gynecology January 142
(1): 47-54, 1982.
Fetal Growth Chart Using the Ultrasonotomographic Technique, Keiichi Kurachi, Mineo Aoki,
Department of Obstetrics and Gynecology, Osaka University Medical School Revision 3 (September
1983)
Studies on Fetal Growth and Functional Developments, Takashi Okai, Department of Obstetrics and
Gynecology, Faculty of Medicine, University of Tokyo
A3.13: FBP Criterion
FBP is a method to estimate fetus physiological condition through fetus response experiment,
placental level and indexes such as amniotic fluid.
The score criterion provided by the system is based on Vintzileos formula, as shown in the
following table.
DUS 60 Digital Ultrasonic Diagnostic Imaging System User Manual Obstetrical References
- 207 -
Fetus Index 0 1 2
Observation
Time
Note
FHR FHR
FHR≤1
time
FHR≥15
times/m ，
time≥15S ，
1~4 times
FHR≥15
times/m ，
time≥15S ，
≥5 times
20m
Fetal
Movement
FM No FM 1~2 times FM FM≥3 times 30m
Fetal
Breath
Movement
FBM
No FBM，
or
time≤30S
FBM≥1 time，
time 30-60S
FBM≥1
time ，
time≥60S
30m
Fetal
Tonicity
FT
Limbs
stretched,
no
bending,
fingers
loose
Limbs or
spine
stretch-bend
>=1 time
Limbs or
spine
stretch-bend
>=1 time
30m
Scores
obtained
through
fetus
response
experime
nt can be
input into
the
system
on report
interface.
Amniotic
Fluid
AF
AF＜1cm
1cm≤AF≤2cm
AF＞2cm
Obtained by image
measurement
Placental
Level
PL
Placental
grade is
3.
Placental on
posterior wall,
no grade
Placental
grade is 2.
Placental level includes 0,
1, 2 and 3 according to the
fetal acoustic image.
FBP criterion is as follows:
Total Score Condition
7-12 Normal, Chronic asphyxia risk low
3-6 Chronic asphyxia suspicious
0-2 Chronic asphyxia risk high