PMC6267358_01
Patient with iatrogenic brachial plexus trunk injury as a consequence of the blockage of the plexus during anesthesia for a surgery of the right shoulder capsule.. Note: Green area: superficial allodynia area; purple area: deep allodynia area; red area: numbness.
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Given that low-frequency SCS was not much beneficial, she started to take painkillers up to November 2016, when she visited our center due to continual pain in the right shoulder and upper arm, combined with a numb sensation in the acromial region, superficial allodynia in the subclavicular region, and deep allodynia in the supraclavicular region (Figure 1).
(A) Cervical (C5-C6) lead position with tonic SCS. (B) Cervical (C2-C3) lead position with HFSCS.. Abbreviations: SCS, spinal cord stimulation; HFSCS, high-frequency SCS.
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The radiographic examination of the cervical spine showed electrode positioning at the C4-C5 level (Figure 2A). Given that tonic SCS was ineffective, the patient underwent an HFSCS trial period with the lead positioned at the C2-C3 level (Figure 2B).