The purpose of this research study is to find out if a nerve block called the quadratus lumborum (QL) block can provide pain relief after hip replacement, similar to a lumbar plexus (LP) nerve block that we currently offer patients. There will be two groups in this study: one group will have the QL block placed and the other group will have the LP block placed.
The purpose of this research study is to find out if a nerve block named quadratus lumborum block (QL) can provide better pain relief than having no nerve block for patients having their surgery on their hip through several small incisions while the surgeon looks with a camera (hip arthroscopy).
This is an observational study which will collect sweat chloride values from approximately 1000 cystic fibrosis subjects who are currently on cystic fibrosis transmembrane conductance regulator (CFTR) modulators. This study will require one visit to an MUSC clinic which will last approximately 2 hours. Compensation is provided.