<unk> s prior to expansion. Dilapan-S (left). Laminaria (right)<unk> s are medical implements used to dilate the uterine cervix by swelling as they absorb fluid from surrounding tissue. They may be composed of natural or synthetic materials. A laminaria stick or tent is a thin rod made of the stems of dried Laminaria, a genus of kelp. Laminaria sticks can be generated from Laminaria japonica and Laminaria digitata. Synthetic<unk> s are commonly referred to by their brand names, such as Dilapan. Dilapan-S are composed of polyacrylonitrile, a plastic polymer. The hygroscopic nature of the polymer causes the<unk>  to absorb fluid and expand.
Osmotic dilator
Volume expander
Politzerization
Diuresis
Osmotherapy
Acetazolamide
Corrective lens
Cerebral activator