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Table 3 Surgical data

From: Early postoperative serum S100β levels predict ongoing brain damage after meningioma surgery: a prospective observational study

   n Percentage
Approach Pterional 24 46
  Frontal 21 40
  Parietal 7 14
Navigation Yes 21 40
  No 31 60
Extent of excision (Simpson grade) [27] 1 – Macroscopically complete removal of dura, bone 39 75
  2 – Macroscopically complete removal, dural coagulation 11 21
  3 – Complete tumour resection, dura not coagulated 2 4
Plane Difficult (invasion of the pia mater and brain) 14 27
  Good (pial plane) 38 73
Tumour vascularity High 2 4
  Medium 29 56
  Low 21 40
  Mean ± SD Median Range
Length of anesthesia (minutes) 385 ± 159 355 195 to 870
Length of surgery (minutes) 295 ± 154 240 75 to 765
Blood loss (cc) 345 ± 189 300 50 to 1,000
  1. SD, standard deviation.