Obstetrics and Gynecology - A.M. Gromova 2000

Uterine Contractility Anomalies
Classification of Labor Activity Anomalies
Excessively Strong Labor Activity (Uterine Hyperactivity)

This type of pathology occurs in 0.4–0.8% of cases and is characterized by intense contractions (exceeding 50 mm Hg), rapid frequency (more than 5 contractions per 10 minutes), and elevated uterine tone (greater than 12 mm Hg).

In cases of hyperactive labor, delivery is completed within 1–3 hours, which disrupts uteroplacental Circulation and fetal gas exchange.

Frequent and intense contractions often lead to premature placental abruption, tears of the cervix, Perineum, and Vagina, as well as potential Hemorrhage, birth trauma, and intracranial Hemorrhage in the newborn.

To relieve prolonged and intense contractions, effective measures include tocolysis using $eta$-adrenergic agonists (Partusisten 0.5 mg in 250 ml of isotonic sodium chloride solution, Bricanyl, or Ritodrine), intravenous magnesium sulfate (25%—10 ml), or intramuscular injections of Promedol or Omnopon (2%—1 ml).

The parturient woman should be placed on her side opposite to the fetal position, and pudendal anesthesia should be administered during the Second Stage of labor.



Last update: 08/08/2026

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