True knot of the umbilical cord

Ira J. Chasnoff, Mary Ann Fletcher

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Fifty umbilical cords were prepared and examined and their venous perfusion pressures measured with and without a true knot in the cord. Contrary to information in the literature, a loose umbilical cord knot did not affect the venous perfusion pressure. With a tightened knot, the smaller the umbilical cord diameter, the greater was the pressure required to perfuse past the knot. The umbilical vessels, protected by the myxomatous structure of the Wharton's jelly, were rarely completely occluded. These findings correlate clinically with the relatively high incidence yet low fetal mortality rate actually due to a true knot in the umbilical cord.

Original languageEnglish (US)
Pages (from-to)425-427
Number of pages3
JournalAmerican Journal of Obstetrics and Gynecology
Volume127
Issue number4
StatePublished - Feb 15 1977
Externally publishedYes

Fingerprint

Umbilical Cord
Venous Pressure
Wharton Jelly
Perfusion
Fetal Mortality
Umbilicus
Pressure
Mortality
Incidence

ASJC Scopus subject areas

  • Medicine(all)
  • Obstetrics and Gynecology

Cite this

Chasnoff, I. J., & Fletcher, M. A. (1977). True knot of the umbilical cord. American Journal of Obstetrics and Gynecology, 127(4), 425-427.

True knot of the umbilical cord. / Chasnoff, Ira J.; Fletcher, Mary Ann.

In: American Journal of Obstetrics and Gynecology, Vol. 127, No. 4, 15.02.1977, p. 425-427.

Research output: Contribution to journalArticle

Chasnoff, IJ & Fletcher, MA 1977, 'True knot of the umbilical cord', American Journal of Obstetrics and Gynecology, vol. 127, no. 4, pp. 425-427.
Chasnoff IJ, Fletcher MA. True knot of the umbilical cord. American Journal of Obstetrics and Gynecology. 1977 Feb 15;127(4):425-427.
Chasnoff, Ira J. ; Fletcher, Mary Ann. / True knot of the umbilical cord. In: American Journal of Obstetrics and Gynecology. 1977 ; Vol. 127, No. 4. pp. 425-427.
@article{a2c8360f5b5241079a7525da4d52d93f,
title = "True knot of the umbilical cord",
abstract = "Fifty umbilical cords were prepared and examined and their venous perfusion pressures measured with and without a true knot in the cord. Contrary to information in the literature, a loose umbilical cord knot did not affect the venous perfusion pressure. With a tightened knot, the smaller the umbilical cord diameter, the greater was the pressure required to perfuse past the knot. The umbilical vessels, protected by the myxomatous structure of the Wharton's jelly, were rarely completely occluded. These findings correlate clinically with the relatively high incidence yet low fetal mortality rate actually due to a true knot in the umbilical cord.",
author = "Chasnoff, {Ira J.} and Fletcher, {Mary Ann}",
year = "1977",
month = "2",
day = "15",
language = "English (US)",
volume = "127",
pages = "425--427",
journal = "American Journal of Obstetrics and Gynecology",
issn = "0002-9378",
publisher = "Mosby Inc.",
number = "4",

}

TY - JOUR

T1 - True knot of the umbilical cord

AU - Chasnoff, Ira J.

AU - Fletcher, Mary Ann

PY - 1977/2/15

Y1 - 1977/2/15

N2 - Fifty umbilical cords were prepared and examined and their venous perfusion pressures measured with and without a true knot in the cord. Contrary to information in the literature, a loose umbilical cord knot did not affect the venous perfusion pressure. With a tightened knot, the smaller the umbilical cord diameter, the greater was the pressure required to perfuse past the knot. The umbilical vessels, protected by the myxomatous structure of the Wharton's jelly, were rarely completely occluded. These findings correlate clinically with the relatively high incidence yet low fetal mortality rate actually due to a true knot in the umbilical cord.

AB - Fifty umbilical cords were prepared and examined and their venous perfusion pressures measured with and without a true knot in the cord. Contrary to information in the literature, a loose umbilical cord knot did not affect the venous perfusion pressure. With a tightened knot, the smaller the umbilical cord diameter, the greater was the pressure required to perfuse past the knot. The umbilical vessels, protected by the myxomatous structure of the Wharton's jelly, were rarely completely occluded. These findings correlate clinically with the relatively high incidence yet low fetal mortality rate actually due to a true knot in the umbilical cord.

UR - http://www.scopus.com/inward/record.url?scp=0017328093&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0017328093&partnerID=8YFLogxK

M3 - Article

C2 - 835642

AN - SCOPUS:0017328093

VL - 127

SP - 425

EP - 427

JO - American Journal of Obstetrics and Gynecology

JF - American Journal of Obstetrics and Gynecology

SN - 0002-9378

IS - 4

ER -