Now you can choose the latest PK models that suit you and your best. In addition to the original Marsh model, The Alaris PK syringe pump offers a choice of models with Plasma and Elect Setargeting capability (see drug prescribing information We are 2 models for children The Alaris PK syringe pump user interface has been developed in cooperation with leading European anesthesiologists. Set up is the same every time and very easy to use. Unnecessary features can be disabled. Only relevant information is shown, All setup parameters are displayed on one screen.