[How to avoid failure and complications in guided punctures]

The author discusses some actual procedures associated with diagnostic and therapeutic interventions using ultrasonography. Based on his own experience from practice, documented in tables with brief comments (attached to the paper) and with regard to data in the literature, he draws attention to some facts (technique of puncture, selection of instruments, local anaesthesia, method of drainage) which may to a varying extent influence the results of aimed puncture or cause possible complications.