Somatosensory Evoked Potential Model for Assessment of Nerve Regeneration

Kwiecien, Greg J.; Siemionow, Wlodzimierz

doi:10.1007/978-1-4471-6335-0_52

Cited by 1 publication

(2 citation statements)

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“…A ground electrode was inserted into adjacent subcutaneous tissue. The distance between two electrodes was measured to calculate NCV as in previously described methodology (Kwiecien & Siemionow, ).…”

Section: Methodsmentioning

confidence: 99%

“…Sensory recovery was evaluated by SSEP at 6 months after nerve repair using Biologic A‐PAC 486 computer system (Bio‐logic Systems Corporation, IL, USA). As previously described Kwiecien and Siemionow (), following placement of bipolar hook stimulating electrodes proximally and distally to the nerve conduit, a 6–8 cm skin incision was made over the midline of the scalp and skull was exposed bilaterally to visualize sagittal and coronal sutures. Burr holes were created using 3‐mm surgical drill.…”

Section: Methodsmentioning

confidence: 99%

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Application of epineural sheath conduit for restoration of 6‐cm long nerve defects in a sheep median nerve model

et al. 2018

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Background Due to limited number of studies, we tested feasibility of autologous epineural sheath conduit (ESC) in repair of 6‐cm median nerve gaps in a sheep—the large animal model. Materials and methods Eight ewes, 6–8 months old, 30–35 kg, were divided into three experimental groups: group 1—no defect repair (n = 4 nerves/group), group 2—autograft controls (n = 6 nerves/group), group 3—autologous ESC filled with saline (n = 6 nerves/group). ESC was constructed from a 6‐cm long segment of sheep median nerve and tested for expression of laminin B, Glial fibrillary acidic protein (GFAP), S‐100 and CD31 using immunofluorescent staining. At 6 months after nerve repair, nerve conduction velocity and somatosensory evoked potentials (SSEP) assessed neurosensory recovery, while histomorphometry tested nerve regeneration. Results Ex vivo characterization of ESC, before in vivo nerve gap repair, showed high laminin B expression, which supports axonal growth. At 6 months post‐repair, structural integrity of ESC was preserved. ESC was well‐vascularized and tissue adhesions were comparable to autograft controls. The maximal conduction velocities (29.80 ± 5.85 ms vs. 32.28 ± 6.75 ms; p = .44), action potential amplitudes (32.68 ± 17.44 mV vs. 44.14 ± 23.10 mV; p = .38) and SSEP amplitude values (6.18 ± 5.84 mV vs. 4.68 ± 2.53 mV; p = .28) were comparable between autograft and ESC groups. Presence of regenerating axons was confirmed in the distal segment of ESC at 6 months after repair. Conclusion The feasibility of ESC in restoration of 6‐cm long nerve defects in a sheep median nerve model was confirmed by nerve conduction assessments and correlated with axonal regeneration tested by histomorphometry. We confirmed ESC potential in support of regeneration of long nerve defects.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%