Syringe systems and methods for multi-stage fluid delivery

Inventors

Hopkins, Michael

Assignees

True Concepts Medical Technologies LLC

Abstract

Embodiments of a syringe-based device for delivering fluid include a housing, a port, the port being positioned at about the distal end of the housing, a plunger assembly, the plunger assembly including, a plunger seal, a valve, and a cannula, a first fluid reservoir, where the first fluid reservoir retains a first type of fluid, a syringe including a syringe body, a syringe port, a plunger, and a second fluid reservoir, the second fluid retaining a second type of fluid, and where the syringe transitions from a first configuration in which a first portion of the first fluid type is delivered through the port, to a second configuration in which the second type of fluid in the second fluid reservoir is delivered through the port, to a third configuration in which a second portion of the first fluid type is delivered through the port.

Core Innovation

The invention relates to a syringe-based apparatus for delivering fluid through a distal port by transitioning an actuator mechanism among a first configuration, a second configuration, and a third configuration. A housing defines an inner volume and includes the port at a distal end, and a plunger assembly is moveable relative to the housing and includes a plunger seal and a valve.

The apparatus includes a first fluid reservoir and a second fluid reservoir arranged as coaxial reservoirs. The first fluid reservoir is defined at least partially by the housing and the plunger seal and contains a first amount of a first type of fluid, while the second fluid reservoir is defined at least partially by the syringe body and the plunger and retains a second amount of a second type of fluid, which is delivered through the port when the actuator transitions to the second configuration.

The actuator mechanism is retained at least partially within the housing inner volume and includes a syringe body configured to be coupled to the valve, with a plunger moveable within the syringe body. The actuator mechanism is operably configured to deliver a first portion of the first amount of fluid through the port in the first configuration, deliver the second amount of the second type of fluid through the port in the second configuration, and then deliver a second portion of the first amount of the first fluid through the port in the third configuration.

The described embodiments further address fluidic isolation between the reservoirs and the staged transition between configurations to prevent unwanted mixing or expulsion prior to the intended sequence. Further embodiments describe valves and one-way check valve functionality, interference-fit type features and friction-coefficient relationships, locking mechanisms that restrict relative movement of components in locked and open positions across configurations, and a staged flush/medicament/flush sequence using a pre-filled flush reservoir and a detachable arrangement for introducing the medicament stage, including priming-related positional behavior.

Claims Coverage

The independent claims cover a syringe-based apparatus that delivers a first fluid in two portions with a second fluid delivered between the portions, using a coaxial arrangement of a first and second fluid reservoir and an actuator mechanism that transitions through first, second, and third configurations. The independent claims specify a total of three delivery configurations and identify coaxial first and second reservoirs.

Across the independent claims, the core coverage is the staged delivery sequence achieved by operably transitioning an actuator mechanism through first, second, and third configurations, delivering a first fluid in two portions with a second fluid delivered between the portions via coaxial first and second reservoirs coupled to a distal port.

Stated Advantages

Documented Applications

No documented applications found