Effect of Early Sacral Neuromodulation on Bladder Function in a Rat Model of Incomplete Spinal Cord Injury Due to Focal Contusion. Issue 6 (2nd December 2018)

• Record Type: Journal Article
• Authors: Lee, Young Ju; Yoon, Cheol Yong; Lee, Min Seung; Song, Byung Do; Lee, Sang Wook; Jeong, Seong Jin
• Is Part Of: Neuromodulaton. Volume 22:Issue 6(2019)
• Page Start: 697
• Page End: 702
• Publication Date: 2018-12-02
• Subjects: Incomplete spinal cord injury -- neurogenic bladder -- neuromodulation -- rat -- urodynamics; Central nervous system -- Physiology -- Periodicals; Central nervous system -- Diseases -- Periodicals; 616.8
• DOI: 10.1111/ner.12895
• Languages: English
• ISSNs: 1094-7159

Abstract

Abstract : Objectives: Incomplete spinal cord injury (SCI) accounts for two‐thirds of all SCIs in clinical practice. Preclinical research on the effect of sacral neuromodulation (SNM) on bladder function, however, has been focused only on animal models of complete SCI. We aimed to evaluate the effect of early SNM on bladder responses in a rat model of incomplete SCI. Materials and Methods: Altogether, 21 female Sprague–Dawley rats were equally assigned to control (CTR), SCI + sham stimulation (SHAM), and SCI + SNM (SNM) groups. In the SHAM and SNM groups, incomplete SCI was created by producing a moderate contusion with an NYU‐MASCIS impactor at the T9–T10 level of the spine, with needle electrodes implanted bilaterally into the S2 or S3 sacral foramen. Only SNM group underwent electrical stimulation for 28 days, beginning on day 7 after SCI. Cystometry was performed 35 days after SCI. Results: Although the interval between voiding contractions was significantly longer in the SHAM group than the CTR group (25.5 ± 1.4 vs. 12.5 ± 1.7 min; p < 0.05), there were no significant differences between the SNM group (16.5 ± 1.5 min) and the CTR group. Maximum voiding contraction pressure did not differ among the groups. The SNM group had a significantly lower frequency (3.5 ± 0.5 vs. 14.6 ± 2.0; p < 0.05) and maximum pressure (11.4 ± 6.2 vs. 21.3 ± 1.8 cmH2 O; p < 0.05) of nonvoiding contractions than the SHAM group. Conclusions: Our results provide experimental evidence that early SNM treatment may prevent or diminish bladder dysfunctions (e.g., detrusor overactivity, abnormal micturition reflex) in a clinical condition of incomplete SCI.