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Factores de riesgo de disminución de la amplitud de los potenciales evocados somatosensoriales durante la

Takahiro Yamauchi1, Motoki Inaji1, Daisu Abe1

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Identificar a los pacientes en riesgo de complicaciones de la cirugía de reducción de accidentes cerebrovasculares es clave. La enfermedad sintomática, la estenosis contralateral severa y la hipoplasia del segmento A1 predicen disminuciones de los potenciales evocados somatosensoriales (SSEP) durante la endarterectomía carotídea (CEA).

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Área de la Ciencia:

  • Neurology
  • Vascular Surgery
  • Neurophysiology

Sus antecedentes:

  • Carotid endarterectomy (CEA) is a crucial stroke prevention surgery.
  • Cerebral hypoperfusion during carotid artery clamping is a significant risk.
  • Somatosensory evoked potentials (SSEPs) monitor for hypoperfusion, but predictors of amplitude decrease are unclear.

Objetivo del estudio:

  • To identify risk factors for substantial SSEP amplitude decreases during CEA with routine shunting.
  • To characterize patients at increased risk for intraoperative cerebral hypoperfusion.

Principales métodos:

  • Retrospective analysis of 467 patients undergoing CEA with routine shunting and SSEP monitoring (2008-2022).
  • Defined significant SSEP amplitude decrease as ≥50% reduction in N20-P25 amplitude.
  • Evaluated associations between SSEP changes and clinical/imaging findings using univariable and multivariable analyses.

Principales resultados:

  • 18.8% of patients experienced a significant SSEP amplitude decrease.
  • Independent risk factors included symptomatic disease, severe contralateral carotid stenosis (≥70% or occlusion), and A1 segment hypoplasia.
  • Beta-blocker use was associated with a reduced risk of SSEP amplitude decreases.

Conclusiones:

  • Preoperative identification of at-risk patients is possible.
  • Factors like symptomatic disease, contralateral stenosis severity, and A1 segment morphology predict SSEP changes.
  • This assessment can help mitigate neurological complications during CEA.