Pain Clinic patients undergoing physiotherapy for rehabilitation often have arm freezing
performed. The quality of physiotherapy is felt to be superior with good pain control. The
quality of the freezing is felt to be better when it is done with ultrasound guidance. We are
able to use less drug to achieve the same result. For this reason, we are doing a study to
look at the level of freezing drug that accumulates in the body. We feel that the drug levels
will be significantly different. We also feel that the time-to-peak drug level will be
different than with traditional arm freezing procedures.