RT Book, Section
A1 Byars, Donald V.
A1 Knapp, Barry J.
A1 Feyzeau, Kean O.
A2 Ma, O. John
A2 Mateer, James R.
A2 Reardon, Robert F.
A2 Byars, Donald V.
A2 Knapp, Barry J.
A2 Laudenbach, Andrew P.
SR Print(0)
ID 1175882396
T1 Second and Third Trimester Pregnancy
T2 Ma and Mateer's Emergency Ultrasound, 4e
YR 2021
FD 2021
PB McGraw-Hill Education
PP New York, NY
SN 9781260441819
LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1175882396
RD 2024/04/17
AB Over  the  last  30  years,  ultrasound  has  played  an  essential  role  in  the  care  of  the  obstetric  patient.  The  body  of  knowledge  and  expertise  in  obstetric  sonography  is  robust.  Ultrasound  is  the  primary  imaging  modality  for  evaluation  of  uterine,  cervical,  and  amniotic  fluid  abnormalities;  placental  and  umbilical  cord  problems;  and  determination  of  gestational  age,  fetal  congenital  abnormalities,  multiple  gestation,  and  fetal  presentation.1  While  many  parts  of  the  examination  are  not  relevant  in  the  emergency  setting,  there  are  some  findings  that  may  be  critical  to  the  acute  care  of  an  obstetric  patient.  This  chapter  discusses  the  use  of  point-of-care  ultrasound  (POCUS)  to  evaluate  pregnant  patients  in  their  second  and  third  trimesters.  During  this  time  period,  the  major  indications  for  its  use  are  in  the  initial  assessment  of  vaginal  bleeding,  labor,  trauma,  and  abdominal  pain.  Emphasis  will  be  placed  on  a  focused  or  goal-directed  ultrasound  examination  to  rapidly  measure  fetal  cardiac  activity,  estimate  gestational  age,  and  exclude  placenta  previa.  Additional  applications  include  the  assessment  of  cervical  length  and  fetal  position,  and  for  the  evaluation  of  traumatic  and  nonobstetrical  causes  of  abdominal  pain.