Terason t3000 - Appendix D Gestational Tables

Terason t3000 / Echo Ultrasound System User Guide 322
Appendix D Gestational Tables
This appendix contains gestational tables for the measurements included with the
Obstetrical exam type:
• AC Chart, Hadlock, 12-42 weeks
• BPD Chart, Hadlock, 12.1 - 41.6 weeks
• CRL Chart, Hadlock, 5.7 - 18 weeks
• FL Chart, Hadlock, 12.2 - 42 weeks
• GSD, Hansmann - 6.0 - 14.0 weeks
• HC Chart, Hadlock, 12.2-41.9 weeks
• HL Chart, Jeanty, 12.6 - 40.1 weeks
Calculating Estimated Fetal Weight on page 162 describes the procedure for measuring an
obstetrical scan to estimate the fetal weight. This calculation is based on the Hadlock
tables in this Appendix, and uses this formula:
EFW[g] = 10^ (1.326 - (0.00326 * AC[cm] * FL[cm]) + (0.0107 * HC[cm]) + (0.0438 * AC[cm])
+ (0.158 * FL[cm])
)
where:
AC Chart, Hadlock, 12-42 weeks
EFW Estimated Fetal Weight
AC Abdominal Circumference
HC Head Circumference
FL Femur Length
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
AC
(mm)
MA
(wks)
51 12.1 93 15.5 135 19.0 177 22.6 219 26.4 261 30.2 304 34.4 346 38.5
52 12.2 94 15.5 136 19.0 178 22.7 220 26.4 262 30.3 305 34.5 347 38.6
53 12.2 95 15.6 137 19.1 179 22.8 221 26.5 263 30.4 306 34.6 348 38.7
54 12.3 96 15.7 138 19.2 180 22.9 222 26.6 264 30.5 307 34.7 349 38.8
55 12.4 97 15.8 139 19.3 181 22.9 223 26.7 265 30.6 308 34.7 350 38.9
56 12.5 98 15.9 140 19.4 182 23.0 224 26.8 266 30.7 309 34.8 351 39.0
57 12.5 99 15.9 141 19.5 183 23.1 225 26.9 267 30.8 310 34.9 352 39.1
58 12.6 100 16.0 142 19.6 184 23.2 226 27.0 268 30.9 311 35.0 353 39.2
59 12.7 101 16.1 143 19.6 185 23.3 227 27.1 269 31.0 312 35.1 354 39.3
60 12.8 102 16.2 144 19.7 186 23.4 228 27.2 270 31.1 313 35.2 355 39.4
61 12.9 103 16.3 145 19.8 187 23.5 229 27.3 271 31.2 314 35.3 356 39.5