1698
Two patients had an episodic ICP greater than 40 mm Hg for more than 36 hours , the third patient had an episodic ICP greater than of 50 mm Hg for more than 36 hours , and the fourth patient had an episodic ICP greater than 50 mm Hg for more than 48 hours .
 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