Open AccessContractile Activity in the Human Uterine Cervix and Corpus During Cervical Dilatation by Laminaria Tent in First Trimester Legal Abortions
Author(s) -
Jonasson A.,
Larsson B.
Publication year - 1989
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016348909021010
Subject(s) - laminaria , medicine , cervix , cervical canal , uterine contraction , uterine cavity , cervical dilatation , catheter , uterine cervix , vacuum aspiration , gynecology , obstetrics , surgery , uterus , carcinoma , cancer , population , biology , ecology , environmental health , research methodology , family planning , algae
Millar microtransducers were used in 7 patients to record contractile variations in the cervix and corpus during dilatation of the cervical canal by Laminaria tent preceding first‐trimester vacuum aspiration. The spontaneous contractile activity was registered in a control group of 5 patients without laminaria pretreatment. Two Millar catheters were used. The sensor tip of one Millar catheter was placed extra‐amniotically in the uterine cavity, and the other one in the mid‐cervical canal. Both sensor tips faced the wall of the cervix and corpus. The study showed that laminaria tents not only have a gentle dilatating effect on the cervix, but also induce painless uterine contractions, of amplitudes reaching 20 mmHg, and increased contractile activity in the cervix for the duration of dilatation.