High-pressure syringes are medical devices used to inject fluids or medications into the body at a high pressure. They are typically made of durable materials such as stainless steel or polycarbonate to withstand the high pressures involved.

These syringes are often used in medical procedures such as angiography, CT scans, and MRI scans, where contrast agents are injected into the bloodstream to highlight blood vessels or organs for imaging purposes. In these procedures, the syringe must be able to withstand pressures up to several thousand pounds per square inch (psi) without breaking or leaking.

High-pressure syringes typically have a capacity of 50-200 milliliters and can be operated manually or with a power injector. They may also include features such as a pressure gauge or a stopcock valve to regulate the flow of fluid.

It is important to use high-pressure syringes that are specifically designed for the intended purpose and are compatible with the fluid or medication being injected. This can help ensure safe and effective delivery of the fluid or medication while minimizing the risk of complications.