title: Magnetic resonance brain imaging in patients with acute stroke: feasibility and patient related difficulties.
abstract: OBJECTIVE
  To assess organisational and patient specific limitations and safety of magnetic resonance imaging (MRI) as the first line investigation for hospital admitted stroke patients.
  
  
  METHODS
  Consecutive patients admitted with acute stroke were assessed and an attempt was made to perform MRI in all patients. Oxygen saturation and interventions required during scanning were recorded.
  
  
  RESULTS
  Among 136 patients recruited over 34 weeks, 85 (62%) underwent MRI. The patients' medical instability (15 of the 53 not scanned), contraindications to MRI (six of the 53 not scanned), and rapid symptom resolution (10 of the 53 not scanned) were the main reasons for not performing MRI. Of the 85 patients who underwent MRI, 26 required physical intervention, 17 did not complete scanning, and 11 of the 61 who had successful oxygen saturation monitoring were hypoxic during MRI. Organisational limitations accounted for only 13% of failures to scan.
  
  
  CONCLUSIONS
  Up to 85% of hospital admitted acute stroke patients could have MRI as first line imaging investigation, but medical instability is the major limitation. Hypoxia is frequent in MRI. Patients should be monitored carefully, possibly by an experienced clinician, during scanning.
authors.affiliation: Division of Clinical Neurosciences, Western General Hospital, Edinburgh EH4 2XU, UK.
authors.forename: P J
authors.initials: PJ
authors.lastname: Hand
authors.forename: J M
authors.initials: JM
authors.lastname: Wardlaw
authors.forename: A M
authors.initials: AM
authors.lastname: Rowat
authors.forename: J A
authors.initials: JA
authors.lastname: Haisma
authors.forename: R I
authors.initials: RI
authors.lastname: Lindley
authors.forename: M S
authors.initials: MS
authors.lastname: Dennis
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D000075202:Contraindications; D005240:Feasibility Studies; D005260:Female; D006760:Hospitalization; D006801:Humans; D000860:Hypoxia / Q000209:etiology / Q000517:prevention & control; D008279:Magnetic Resonance Imaging / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000378:metabolism; D018579:Patient Selection; D020521:Stroke / Q000473:pathology*; D000071939:Stroke Rehabilitation
chemical_list: D010100:Oxygen