Contraindications. The Spinal Twine Stimulator devices are certainly not for clients that are not able to work the system, have failed trial stimulation by failing to get powerful pain relief, are bad surgical threats, or are pregnant. Warnings. Clients implanted with Boston Scientific Spinal Wire Stimulator Techniques without ImageReady™ MRI https://sgvasculargrp.com/medical-condition/varicose-spider-veins/painmanagement-thumb/