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KMID : 1001920220650020276
Journal of Korean Neurosurgical Society
2022 Volume.65 No. 2 p.276 ~ p.286
Clinical Outcomes after Spinal Cord Stimulation According to Pain Characteristics
Ha Jong-Ho

Huh Ryoong
Kim Shin-Gyeom
Im Soo-Bin
Jeong Je-Hoon
Hwang Sun-Chul
Shin Dong-Seong
Kim Bum-Tae
Chung Moon-Young
Abstract
Objective: Spinal cord stimulation (SCS) is an effective treatment for chronic neuropathic pain. However, its clinical efficacy in regard to specific types of pain has not been well studied. The primary objective of this study was to retrospectively analyze the clinical outcomes of paddle-type SCS according to the type of neuropathic pain.

Methods: Seventeen patients who underwent paddle-lead SCS at our hospital were examined. Clinical outcomes were evaluated pre- and postoperatively (3 months, 1 year, and last follow-up) using the Neuropathic Pain Symptom Inventory (NPSI). The NPSI categorizes pain as superficial, deep, paroxysmal, evoked, or dysesthesia and assess the duration of the pain (pain time score). Changes in NPSI scores were compared with change in Visual analogue scale (VAS) scores.

Results: After SCS, the pain time score improved by 45% (independent t-test, p=0.0002) and the deep pain score improved by 58% (independent t-test, p=0.001). Improvements in the pain time score significantly correlated with improvements in the VAS score (r=0.667, p=0.003, Spearman correlation). Additionally, the morphine milligram equivalent value was markedly lower after vs. before surgery (~49 mg, pared t-test, p=0.002). No preoperative value was associated with clinical outcome.

Conclusion: The NPSI is a useful tool for evaluating the therapeutic effects of SCS. Chronic use of a paddle-type spinal cord stimulation improved the deep pain and the pain time scores.
KEYWORD
Spinal cord stimulation, Chronic pain, Pain management, Pain measurement
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