2017
Preoperative ScvO2 decreased from 77 % + / - 10 % to 70 % + / - 11 % ( p < 0 . 001 ) immediately after surgery and remained unchanged 12 hours later .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 None