Table 2.

Inclusion and Exclusion Criteria

Inclusion Criteria	Exclusion Criteria
Subjects are status post amputation of an upper or lower limb (ie, amputation is not congenital)	Active infection
Refractory PLP, despite conservative (nonsurgical) management for > 6 months	Underlying congenital segmentation or other spinal anomalies that result in differential nerve root pressures
Positive anesthetic/steroid block, as performed under CT guidance in an analogous fashion to planned cryoablation procedure	Significant spinal stenosis interpreted as “severe” on any cross-sectional imaging study
Ability and willingness of patient to provide written informed consent	Pregnant or planning to become pregnant
	Immunosuppression
	History or laboratory results indicative of any significant cardiac, endocrine, hematologic, hepatic, immunologic, infectious, metabolic, urologic, pulmonary, gastrointestinal, dermatologic, psychiatric, renal, neoplastic, or other disorder that in the opinion of the principal investigator would preclude safe performance of cryoablation
	Uncorrectable coagulopathies
	Concurrent participation in another investigational trial involving systemic administration of agents or within the previous 30 d
	Previous surgical intervention—after amputation—that may have altered target nerve

PLP = phantom limb pain.