Medical devices, namely, medical pumps in the nature of pumps for circulating blood; medical devices, namely, control units for medical pumps in the nature of controllers for controlling medical pumps for circulating blood; medical devices, namely, guidewires; medical devices, namely, medical introducer kits for positioning a pump in the circulatory system of a patient comprised primarily of access sheaths used to guide the insertion of other medical equipment for diagnostic or vascular interventions, guidewires, and also including insertion tools for placement of medical devices in the circulatory system, catheters for placement of medical pumps in the circulatory system, and control units featuring recorded software for controlling medical pumps