Answer by  
                                                                                          mike49 (373)
                                                            
                          
                          
                                                          They are the peripheral nerve blocks used for a variety of surgical procedures. These blocks benefit over general and nueraxial anesthesia. It allows bypass of the phase I anesthetic recovery room, and mitigates issues known to prolong post anesthesia care unit stay, thereby decreasing cost. Peripheral nerve blocks also provide analgesia postoperatively with indwelling perineural cathers.