Proactive Medical | Protekt® 500 Sit to Stand Patient LiftProactive Medical Protekt 500 lb Sit to Stand Lift Heavy Duty Patient Transfer Solution with Long Lasting Battery and Safety Features The Proactive Medical Protekt 500 lb. Sit to Stand Lift is a heavy duty mobility aid designed to support safe and efficient patient transfers. With a higher weight capacity than most standard models, this lift is built to accommodate bariatric patients or those who need extra support during standing and sitting