Premium
DILATATION OF THE PAROUS NON‐PREGNANT CERVIX
Author(s) -
Liu David T. Y.,
Black Martin M.,
Melcher David H.,
Melville Herbert A. H.,
Cameron Stephen,
Morgon John
Publication year - 1975
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/j.1471-0528.1975.tb00627.x
Subject(s) - cervix , obstetrics , medicine , pregnancy , gynecology , biology , cancer , genetics
Summary In vitro cervical dilatations were carried out on 33 uteri removed by hysterectomy for conditions not involving the cervix from parous women in their reproductive span of life. A specially designed force measuring dilator was used for all the tests. The analysis of the results involved the application of a thick‐walled cylindrical stress determination technique. Using this approach it was possible to calculate quasi‐elastic moduli for different degrees of dilatation and obtain theoretical distributions of radial and circumferential stress across the cervical wall. These results indicated a yielding of the cervical tissue at about 9 to 11 mm. dilatation in a significant number of cases.