The Conversion Ratio From Intravenous (Iv) Hydromorphone To Oral (Po) Opioids In Patients With Cancer.

197 Background: Inpatients with cancer frequently undergo conversions from IV to PO hydromorphone (HM) or opioid rotation (OR) from IV HM to another PO opioid prior to discharge. Currently used conversion ratios (CR) between IV and PO HM range from 2-5 and opioid rotation ratios (ORR) between IV HM and oral morphine equivalent daily dose (MEDD) range from 10-20. This large variation in ratios may lead to uncontrolled pain or overdosing. Our aim was to determine the accurate CR from IV to PO HM and ORR from IV HM to PO morphine and oxycodone (measured as MEDD). Methods: We reviewed records of 4745 consecutive inpatient palliative care consults in our institute during 2010-14 for patients who underwent conversion from IV to PO HM or OR from IV HM to PO morphine or oxycodone. Patient characteristics, symptoms and opioid doses were determined in patients successfully discharged on oral opioids without readmission within 1 week. Linear regression analysis was used to estimate the CR or ORR between the 24 hour ...