RT Book, Section
A1 Cunningham, F. Gary
A1 Leveno, Kenneth J.
A1 Bloom, Steven L.
A1 Dashe, Jodi S.
A1 Hoffman, Barbara L.
A1 Casey, Brian M.
A1 Spong, Catherine Y.
SR Print(0)
ID 1160775530
T1 Intrapartum Assessment
T2 Williams Obstetrics, 25e
YR 2018
FD 2018
PB McGraw-Hill Education
PP New York, NY
SN 9781259644320
LK obgyn.mhmedical.com/content.aspx?aid=1160775530
RD 2024/04/20
AB To  study  the  forces  exerted  by  labour,  a  rubber  bag  was  inserted  into  the  uterus  which  was  connected  with  a  manometer.  In  this  way  it  was  found  that  the  intra-uterine  pressure,  in  the  intervals  between  the  contractions,  was  represented  by  a  column  of  mercury  20  millimeters  high,  5  of  which  were  due  to  the  tonicity  of  the  walls  and  15  to  its  contents.  During  the  pains,  however,  the  mercury  rose  considerably,  reaching  a  height  of  from  80  to  250  millimeters.—J.  Whitridge  Williams  (1903)