DILATATION OF THE PAROUS NON-PREGNANT CERVIX

  1. David T. Y. Liu Registrar†,
  2. Martin M. Black Reader in Biomedical Engineering,
  3. David H. Melcher Consultant Pathologist,
  4. Herbert A. H. Melville Consultant Obstetrician and Gynaecologist,
  5. Stephen Cameron Research Student,
  6. John Morgon Chief Technician

Article first published online: 23 AUG 2005

DOI: 10.1111/j.1471-0528.1975.tb00627.x

Issue

BJOG: An International Journal of Obstetrics & Gynaecology

BJOG: An International Journal of Obstetrics & Gynaecology

Volume 82, Issue 3, pages 246–251, March 1975

Additional Information

How to Cite

Liu, D. T. Y., Black, M. M., Melcher, D. H., Melville, H. A. H., Cameron, S. and Morgon, J. (1975), DILATATION OF THE PAROUS NON-PREGNANT CERVIX. BJOG: An International Journal of Obstetrics & Gynaecology, 82: 246–251. doi: 10.1111/j.1471-0528.1975.tb00627.x

Author Information

  1. Graduate Division of Biomedical Engineering University of Sussex and Brighton Area Health Authority

  1. †

    Present appointment: Lecturer in Obstetrics and Gynaecology, University College Hospital, London.

Publication History

  1. Issue published online: 23 AUG 2005
  2. Article first published online: 23 AUG 2005

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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.

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