The choice of diluent is dependent upon the extent of neurolysis desired. The use of higher concentrations of phenol might predispose to a higher incidence of vascular injury. Shelf life exceeds one year when the solution is refrigerated and not exposed to light.
You asked whether a person can get a modification of a child support order that is nearly 20 years old to increase the time period for paying child support by requiring payment until the child reaches an age beyond the age specified in the original order.
Child support terminates when a child turns 18 years old except when the 18-year-old child is still a full-time high school student and lives with a parent. In that situation, child support terminates when the child turns 19 or graduates from high school, whichever occurs first.