It's performed to correct single ventricle birth defect. The normal heart has fours chamber - two upper atria and two lower ventricles. With single ventricle there is either a comlpete absence of a second ventricle or it is underdeveloped. Cauterization creates a second ventricle or enlarges a poorly developed one. Source(s): I'm a nurse.
Trivet definition, a small metal plate with short legs, especially one put under a hot platter or dish to protect a table. See more.
Semi-tubular rivets are also referred to as tubular rivets. A partial hole is evident at the tip of the rivet tail end. This calls for less force during driving processes. Waxing is an integral process for tubular rivets. This facilitates proper assembly. They offer a quick means of riveting where items are produced en masse. Tubular rivets are ideal to use as pivot points since the rivet only swells at the tail. The rivets are usually plated with tin, nickel, brass or zinc. Finished tubular rivets have the head to one side with a shallow blind hole apparent on the other side. 3. Compression Rivets. These have two members, a solid male rivet and a female tubular rivet.