Multi-mode syringe

摘要

A syringe cartridge includes a multi-mode device that defines at least two flow regimes having flow rates that differ in response to the same value of a variable. The multi-mode device defines three flow paths. The first flow path allows flow in only a first direction. The second flow path is configured to allow flow below a predetermined rate in a second direction opposite the first direction in response to a variable having a value below a threshold. The third path is configured to allow flow in the second direction at a rate higher than the predetermined rate in response to the variable reaching a value at or above the threshold.

主权项

1. A multi-mode, syringe device, comprising: a body sized for placement within a syringe assembly, the syringe assembly including a plunger assembly, the body defining three flow paths, the body configured to form flow in only a first direction through a first flow path of the three flow paths, the body configured to automatically form flow below a predetermined rate in a second direction opposite the first direction in response to a variable having a value below a threshold through a second flow path of the three flow paths, the body configured to automatically form flow in the second direction at a rate higher than the predetermined rate in response to the variable reaching a value at or above the threshold through a third flow path of the three flow paths, wherein the variable is a force in the second direction applied to the plunger assembly of the syringe assembly.