RT Book, Section
A1 Fleischer, Arthur C.
A1 Desai, Aditi A.
A1 New, Melinda
A1 Kanter, Jessica
A1 Diamond, Michael P.
A2 Fleischer, Arthur C.
A2 Abramowicz, Jacques S.
A2 Gonçalves, Luis F.
A2 Manning, Frank A.
A2 Monteagudo, Ana
A2 Timor, Ilan E.
A2 Toy, Eugene C.
SR Print(0)
ID 1151031096
T1 Transvaginal Sonography of Ectopic Pregnancy
T2 Fleischer's Sonography in Obstetrics and Gynecology: Textbook and Teaching Cases, 8e
YR 2017
FD 2017
PB McGraw-Hill Education
PP New York, NY
SN 9781259641367
LK obgyn.mhmedical.com/content.aspx?aid=1151031096
RD 2024/04/19
AB Key  TermsEctopic  pregnancy:  a  gestational  sac  located  outside  of  the  uterine  lumen.  The  most  common  location  is  within  the  ampullary  segment  of  the  fallopian  tube  (tubal);  other  locations  include:  interstitial,  cornual,  cervical,  within  a  C-section  scar  (“scar  ectopic”),  intra-abdominal,  or  intraovarian.Pregnancy  of  “unknown  location”:  pregnancy  whose  location  (intra-  or  extrauterine)  cannot  be  determined  sonographically.  Short  interval  (3-5  day)  follow-up  sonography  is  highly  recommended.Concept  of  “discriminatory  zone”:  β-hCG  value  above  which  evidence  of  an  early  intrauterine  pregnancy  should  always  or  reliably  be  seen  on  transvaginal  sonography.  This  concept,  previously  thought  to  be  of  major  diagnostic  value,  has  now  been  shown  to  be  of  limited  value.Doubling  time:  expected  time  interval  when  the  β-hCG  level  doubles  in  a  normal  early  intrauterine  pregnancy.  Typically,  the  expected  normal  increase  of  hCG  is  greater  than  or  equal  to  50%  in  48  hours.  It  should  be  noted,  however,  that  there  is  a  fairly  large  range  of  normal,  physiologic  values.