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Cervical dilation from multiple laminaria tents used for abortion
1Department of Obstetrics and Gynecology, Indiana University, School of Medicine, Indianapolis, USA.
Objective:
To quantify the cervical dilation achieved from multiple medium-thick laminaria tents used for 16-26 hours in single applications before abortion.
Methods:
In a practice setting, cervical dilation was studied from all abortions done at greater than 8 weeks in which one or more medium-thick laminaria tents were used in a single application for 16-26 hours. Multiple regression analysis was used to quantify results.
Results:
There was a positive linear regression of dilation against weeks of gestation for all numbers of tents. The more tents, the greater the dilation; the more weeks, the greater the dilation.
Conclusion:
Approximate cervical circumferential dilation from medium-thick laminaria tents under the constraints listed is provided by the formula: Pratt dilation = 12.36 + (2.35 x tents) + (1.79 x weeks).
