“…Conventional medical and surgical interventions, which lie outside the scope of practice of most nurse practitioners, have a limited role for patients with chronic pain. Drug therapy often does not provide satisfactory relief (Fields, 1987;Mayer, 1985;Mehta, 1986;Upton, 1988), and drug tolerance and dependence, mental clouding, and systemic problems can arise with long-term use of analgesics (Mehta, 1986). Peripheral nerve blocks, rhizotomy, and cordotomy, which have uncertain outcomes, may lead to further complications (Mehta, 1986).…”