title: Pre-operative evaluation using therapeutic intensity scoring.
abstract: OBJECTIVE
  A Pre-operative Therapeutic Intensity Score (P-TIS) was developed to quantify intensity of pre-operative care. Its association with post-operative ICU admission was explored.
  
  
  METHODS
  P-TIS assigns 1-4 points to therapeutic interventions and diagnostic procedures based on care intensity. P-TIS was evaluated using elective (n = 716) and emergency (n = 289) surgery patients entering the post-anaesthesia care unit (PACU) or directly admitted to ICU.
  
  
  RESULTS
  P-TIS has chronic (interventions >48 h before surgery, e.g. chronic dialysis therapy: 3 points, oral antibiotics: 1 point) and acute (interventions within 48 h of surgery, e.g. intra-aortic balloon: 4 points, urinary catheter insertion: 1 point) components. Acute P-TIS provided quantitative information, not provided by other methods, about care intensity immediately before surgery. High acute P-TIS were observed in elective patients with high chronic P-TIS and ASA classifications (3 and 4) and emergency surgery and trauma. The higher acute P-TIS, the more likely emergency patients are to receive post-operative ICU rather than intermediate or routine floor care (odds ratio 1.18, P < 0.001). Adding surgical complexity improved acute P-TIS's ability to predict post-operative ICU care in elective patients.
  
  
  CONCLUSIONS
  P-TIS quantifies the intensity of chronic and acute pre-operative care. Acute P-TIS predicted receipt of post-operative ICU care, especially in emergency surgery.
authors.affiliation: Department of Anesthesiology and Critical Care Medicine, Hadassah - Hebrew University Medical Center, Hebrew University - Hadassah School of Medicine, Jerusalem, Israel. Charles@hadassah.org.il
authors.forename: Charles
authors.initials: C
authors.lastname: Weissman
authors.forename: Nava
authors.initials: N
authors.lastname: Kleln
mesh_terms: D000328:Adult; D003422:Critical Care / Q000379:methods* / Q000706:statistics & numerical data; D017558:Elective Surgical Procedures / Q000379:methods; D004630:Emergencies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011182:Postoperative Care / Q000379:methods*; D011300:Preoperative Care / Q000379:methods*; D011997:Recovery Room; D013514:Surgical Procedures, Operative / Q000379:methods; D055815:Young Adult