Diabetes care · 2026
Evaluating Improvement in Pain and Sensory Function When Using High-Frequency (10-kHz) Spinal Cord Stimulation in Individuals With Painful Diabetic Neuropathy: A Multicenter Randomized Controlled Trial (PDN-Sensory).
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Hurley Robert W, Siraj Elias S, Sills Shawn, Engle Mitchell, Johnson Curtis, Pop-Busui Rodica, Armstrong David, Boulton Andrew, Levy Brian, Tesfaye Solomon, Grunberger George, Petersen Erika, Azalde Rose, Edgar Deborah, Nakhle Samer, Yu Cong, Khan Khurram, Skaribas Ioannis, Amirdelfan Kasra, Nguyen Quang, Jameson Jessica, Guirguis Maged, Bradley Kerry, Patel Janus S, Bintrim Daniel J, Caraway David
Аннотация
OBJECTIVE: The PDN-Sensory randomized controlled trial (RCT) evaluated the effects of high-frequency 10-kHz spinal cord stimulation (10-kHz SCS) on pain and sensory function in individuals with painful diabetic neuropathy (PDN).
RESEARCH DESIGN AND METHODS: Participants were randomized 1:1 to conventional medical management (CMM) alone or 10-kHz SCS plus CMM. The primary and key secondary end points were the proportions of participants with pain response (≥50% lower limb pain relief) and sensory improvement (≥3-point reduction in modified Toronto Clinical Neuropathy Score [mTCNS]). Hierarchical secondary outcomes included intraepidermal nerve fiber density (IENFD), sleep, and health and neuropathy-related quality of life (QoL). IENFD and mTCNS assessments were allocation blinded.
RESULTS: A total of 91 participants were randomly assigned to CMM alone (n = 50) or 10-kHz SCS plus CMM (n = 41). In a modified intention-to-treat worst-case analysis, 27 of 34 participants in the 10-kHz SCS group who underwent a temporary trial achieved the primary outcome, versus 2 of 50 CMM-alone participants (P < 0.001). Among those with 6-month data, mTCNS sensory improvement was observed in 16 of 29 (55.2%) 10-kHz SCS participants versus 12 of 48 (25.0%) CMM-alone participants (P = 0.01). The mean change in lower-calf IENFD was 0.58 fibers/mm with 10-kHz SCS versus -0.07 with CMM alone (P = 0.03). Eight of 10 hierarchical secondary end points were met (including sleep and QoL).
CONCLUSIONS: The PDN-Sensory RCT replicated previous pain-reduction findings and showed prespecified, objective improvements in sensory function and IENFD. These 6-month findings support clinically meaningful benefit and are consistent with a potential disease-modifying effect that requires longer-term confirmation.
RESEARCH DESIGN AND METHODS: Participants were randomized 1:1 to conventional medical management (CMM) alone or 10-kHz SCS plus CMM. The primary and key secondary end points were the proportions of participants with pain response (≥50% lower limb pain relief) and sensory improvement (≥3-point reduction in modified Toronto Clinical Neuropathy Score [mTCNS]). Hierarchical secondary outcomes included intraepidermal nerve fiber density (IENFD), sleep, and health and neuropathy-related quality of life (QoL). IENFD and mTCNS assessments were allocation blinded.
RESULTS: A total of 91 participants were randomly assigned to CMM alone (n = 50) or 10-kHz SCS plus CMM (n = 41). In a modified intention-to-treat worst-case analysis, 27 of 34 participants in the 10-kHz SCS group who underwent a temporary trial achieved the primary outcome, versus 2 of 50 CMM-alone participants (P < 0.001). Among those with 6-month data, mTCNS sensory improvement was observed in 16 of 29 (55.2%) 10-kHz SCS participants versus 12 of 48 (25.0%) CMM-alone participants (P = 0.01). The mean change in lower-calf IENFD was 0.58 fibers/mm with 10-kHz SCS versus -0.07 with CMM alone (P = 0.03). Eight of 10 hierarchical secondary end points were met (including sleep and QoL).
CONCLUSIONS: The PDN-Sensory RCT replicated previous pain-reduction findings and showed prespecified, objective improvements in sensory function and IENFD. These 6-month findings support clinically meaningful benefit and are consistent with a potential disease-modifying effect that requires longer-term confirmation.