title: Monitoring of motor and somatosensory systems in a 26-week pregnant woman.
abstract: BACKGROUND
  We report the case of a 34-year-old woman who was 26 weeks pregnant and needed a brain surgery.
  
  
  METHODS
  We performed intraoperative neurophysiological monitoring (IONM) with motor-evoked potentials (MEP) elicited by transcranial electrical stimulation and somatosensory-evoked potentials (SSEP). Additionally, uterine myometric tone from the mother and fetal heart rate were also monitored. Forty-three MEP and 35 SSEP trains were applied (energy delivered, 2.35 and 0.45 J, respectively).
  
  
  RESULTS
  No changes related to electrical stimulation in either uterine muscle tone or fetal heart rate were observed. No motor or new somatosensory deficits appeared.
  
  
  CONCLUSIONS
  Our findings suggest that IONM can be safely applied in pregnant women.
authors.affiliation: Clinical Neurophysiology, Hospital Universitario La Princesa, C/Diego de León 62, 28006, Madrid, Spain. jpastor.hlpr@salud.madrid.org
authors.forename: Jesús
authors.initials: J
authors.lastname: Pastor
authors.forename: Paloma
authors.initials: P
authors.lastname: Pulido
authors.forename: Andrés
authors.initials: A
authors.lastname: López
authors.forename: Rafael G
authors.initials: RG
authors.lastname: Sola
mesh_terms: D000328:Adult; D004558:Electric Stimulation / Q000009:adverse effects / Q000379:methods; D004569:Electroencephalography / Q000009:adverse effects / Q000379:methods*; D005071:Evoked Potentials / Q000502:physiology*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology; D005260:Female; D005910:Glioma / Q000473:pathology / Q000601:surgery; D006801:Humans; D016343:Monitoring, Intraoperative / Q000009:adverse effects / Q000379:methods*; D009434:Neural Pathways / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D019635:Neurosurgical Procedures / Q000379:methods*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology* / Q000517:prevention & control*; D018570:Risk Assessment; D016896:Treatment Outcome