[Peridural block with prolonged action. Preliminary trial].
D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008012:Lidocaine; D008722:Methods; D011247:Pregnancy; D013748:Tetracaine
D013748:Tetracaine; D008012:Lidocaine
Bloqueo peridural de acción prolongada. Ensayo preliminar.