The initial puncture is with a sharp instrument, and this may lead to hemorrhage or perforation of the organ in question. Infection is a possible complication, and hence asepsis is practiced during most<unk>  procedures. Loss of the guidewire into the cavity or blood vessel is a significant and generally preventable complication.
Seldinger technique
Converse technique
Multifocal technique
Ashby technique
Mustardé technique
Side stitch
Stenström technique
Merck stitch method