Injectors are also known as infusion pumps, hypodermic needles, syringes, or needles. These devices are used to introduce fluids, such as medication, saline, or nutrients, into a patient's bloodstream, muscle, or tissue. Infusion pumps are electronic devices that provide a steady and controlled amount of fluids over time, which is ideal for long-term or continuous treatments. Hypodermic needles can be attached to syringes and used to quickly inject small amounts of medication or vaccines. Needles can also be used for blood draws or diagnostic tests. Overall, there are many synonyms for injectors, each one serving a specific purpose in the medical field.