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  • Title: Spinal Cord Stimulators and Intrathecal Pain Pump Removal Versus Retention During Posterior Lumbar Fusion: A Matched Cohort Analysis.
    Author: McDonald CL, Alsoof D, Anderson G, Johnson K, Daniels AH.
    Journal: Clin Spine Surg; 2023 Dec 01; 36(10):E430-E434. PubMed ID: 37482636.
    Abstract:
    STUDY DESIGN: Retrospective cohort study. OBJECTIVE: To determine risks associated with posterior lumbar arthrodesis after spinal cord stimulator (SCS) and intrathecal pain pump (IPP) insertion. SUMMARY OF BACKGROUND DATA: SCS and IPPs aid in the management of chronic back and radicular pain. Little is known regarding the risks of subsequent fusion with these devices in place. METHODS: The PearlDiver Mariner database was queried for spinal fusion between 2010 and 2020. Study groups were created for indwelling SCS or IPP and matched to a separate cohort without SCS or IPP. Subgroups were created for those who had their device removed and those who retained their device at the time of surgery. Complications up to 2 years postoperatively were reviewed and confounding variables were controlled using multivariable logistic regression. RESULTS: Four thousand five hundred three patients had an indwelling SCS/IPP and underwent posterior lumbar fusion. Compared with patients without history of an SCS/IPP, patients undergoing a lumbar fusion with an SCS/IPP which was removed or retained had higher rates of revision surgery at 1 year [7.3% vs. 5.0%, odds ratio (OR) =1.48, P <0.001] and 2 year (10.8% vs. 7.0%, OR =1.59, P <0.001). For all time intervals, there were higher odds of instrumentation failure (2 y: OR =1.65, P <0.001), and pulmonary complications (2 y: OR =1.18, P <0.001). At 2 years, there were higher odds of surgical site complications (OR 1.15, P =0.02) and urinary complications (OR=1.07, P =0.04). There were no differences in complications up to 2 years postoperatively in patients with an SCS/IPP who had their devices retained or removed ( P >0.05). CONCLUSIONS: Patients with a history of spinal cord stimulators and intrathecal pain pumps are at increased risk of mechanical complications and revision fusion compared with patients without these devices. Patients with an SCS or IPP have similar rates of complications during lumbar fusion whether the device is removed or retained.
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