AF and stable CAD: Adjusted-dose warfarin therapy (INR 2.0-3.0) without aspirin; AF with high stroke risk and placement of stent: Triple therapy of dose-adjusted warfarin (INR 2.0-3.0), clopidogrel, and aspirin; for 1 month if bare metal stent; for 3-6 months for drug-eluting stent
This makes it easier to upgrade engine designs for use with injection rather than carburetion, but there is a lack of improved fuel efficiency. Multi-point injection (MPI) systems inject fuel at each cylinder, allowing much greater control over how much fuel the engine burns. In MPI systems, the injection generally takes place directly inside the cylinder's intake valve. Depending on how the injection is handled, MPI systems fall into several types.
A Throttle Body Injection (TBI) system has a single throttle body which contains one or two fuel injectors. The injector(s) spray fuel into the intake manifold. TBI systems were used in the late 1980s and early 1990s. In a Multipoint Fuel Injection (MPI) system, each cylinder has its own individual fuel injector. Each injector is mounted on the intake manifold and sprays fuel directly into the intake port for its cylinder.