Why are ADHD medications prescribed for children? ADHD medications are prescribed to improve attention and reduce hyperactivity and impulsivity in children. They may also be used to improve ability to focus, work and learn. In addition, they may be used to reduce aggression, provide a calming effect and improve coping with frustration.
There are two type of access method random access and sequential access. To go from point A to point Z in a sequential-access system, you must pass through all intervening points. In a random-access system, you can jump directly to point Z.Disks are random access media, whereas tapes are sequential access media.
The goal of chronic vascular access is to provide repetitive access to the circulation with minimal complications. Arteriovenous (AV) access, preferably AV fistulas, should be used when possible to avoid the risks associated with central venous catheters. The types, general characteristics and a comparison of the types of AV hemodialysis access will be reviewed here.