What is childhood apraxia of speech? Childhood apraxia of speech (CAS) is a speech disorder in which a childâs brain has difficulty coordinating the complex oral movements needed to create sounds into syllables, syllables into words, and words into phrases. Typically, muscle weakness is not to blame for this speech disorder.
Related to Breast Cancer. Herceptin: Long-Term Benefits for Breast Cancer. Feb. 24, 2011 -- High-risk breast cancer patients continue to derive benefits from the drug Herceptin even four years after stopping treatment, but questions remain about the biologic therapyâs safety when given with chemotherapy.
For example, tPA has a serum half-life of five minutes, but effects at the clot persist for hours. Anistreplase has a serum half-life of around two hours, while that of streptokinase is 20 minutes. The half-life of reteplase is 18 minutes; that of tenecteplase, 20 minutes.