An ink formulation for gastrointestinal tattooing includes water, carbon black, and hyaluronic acid.

A syringe-based device includes a housing and an actuator mechanism including a first member and a second member. The first member includes a syringe body and a plunger, the plunger being movably disposed within the syringe body. The second member includes a second member plunger seal and a valve operably and selectively coupled to the second member plunger seal such that the valve is positioned proximal of the second member plunger seal. The device also includes a first fluid reservoir and a second fluid reservoir. The device transitions from a first configuration to a second configuration in which the first type of fluid is expelled from the first fluid reservoir, to a third configuration in which the second type of fluid is expelled from the second fluid reservoir through the valve.

Apparatuses and methods for delivering a fluid, including a viscous fluid. These apparatuses may include a fluid reservoir, two or more piston chambers, a manifold, a delivery port, and a drive assembly and may be configured to inject either a predetermined amount of fluid or a continuous stream of fluid. These apparatuses may also be configured to switch between filling, injection and aspiration modes. These apparatuses may generally be hand-held and lightweight and may provide a significant mechanical advantage to the user.

In various aspects, present disclosure is directed to methods, devices and systems whereby one or more low viscosity fluids may be introduced into a catheter and whereby the one or more low viscosity fluids may be converted into a high viscosity fluid in the catheter, which high viscosity fluid may be delivered from an exit port of the catheter.

A gas mixture apparatus includes a measurement control system, an activation system, a pressurized chamber with one or more gases, and a mixing chamber. A filter can be preattached to the outlet of the mixture apparatus, allowing excess gas to be discharged therethrough and then atmospheric air to be drawn into the mixture apparatus through the filter for creating a therapeutic gas mixture.

Syringes are described herein. A syringe includes a syringe body, a first plunger, a biasing member, and a priming indicator. The syringe body defines a syringe cavity, a syringe port, and an indicator window, wherein the syringe port is in fluid communication with the syringe cavity. The first plunger comprises a first plunger shaft extending from the first plunger, the first plunger disposed within the syringe cavity and defining a first chamber in the syringe cavity, wherein the first chamber is in fluid communication with the syringe port. The biasing member couples to the first plunger shaft, wherein the biasing member urges the first plunger from an unprimed position to a primed position toward the syringe port. The priming indicator presents the first indicator portion through the indicator window in the unprimed position and presents the second indicator portion through the indicator window in the primed position.

A syringe assembly, comprising a syringe barrel having a forward end and a rearward end and being arranged along a longitudinal axis; a restricting element, moveably supported onto a portion of the syringe assembly and positionable in one of an injection disabling position and an injection enabling position in different operative orientations of the syringe assembly; a plunger rod assembly displaceable within the syringe barrel and operatively coupled with the restricting element; the plunger rod assembly having a restricting feature adapted to cooperate with the restricting element, such that when the restricting element in the injection disabling position, the plunger rod assembly is permitted to be displaced axially forwardly only up to a certain longitudinal extent relative to the syringe barrel and when the restricting element is in the injection enabling position, the plunger rod assembly is permitted to be further displaced axially forwardly relative to the syringe barrel.

A system including an adapter for sequential engagement with a cartridge containing a first substance and a vial containing a second substance is disclosed. The adapter is configured to first engage with the vial and subsequently engage with the cartridge such that the cartridge is in fluid communication with the vial via the adapter. The system includes a latch member engageable with a portion of the cartridge. A plunger rod includes a protrusion and is adapted to communicate with the latch member, the plunger rod being transitionable from a disengaged position, in which the protrusion of the plunger rod is disengaged from the latch member and the latch member is locked to the cartridge, to an engaged position, in which the protrusion is engaged with the latch member and the latch member is unlocked from the cartridge and locked to the plunger rod.

A container assembly with improved mixing dynamics for mixing substances in preparation for injection by an injection device or for the dispersion of additives in the collection and analysis of biological samples is disclosed. In one configuration, the container assembly includes a first mixing element protruding into an interior of a container. With the container rotated about its longitudinal axis, the first mixing element forms at least one vortex which effectuates mixing of a first substance provided within the container interior and a second substance provided within the container interior.

An agent delivery device comprises: one or more agent containers at a proximal end of the agent delivery device, wherein the one or more agent containers are configured to contain one or more fluids; an insertion section comprising a tube defining one or more lumens, the insertion section coupled to the agent containers such that the one or more fluids may flow from the agent containers to the one or more lumens and out of one or more outlets of the one or more lumens; and a distal impingement structure at the distal end of the insertion section, the distal impingement structure comprising an impingement surface arranged relative to one or more outlets to impinge the one or more fluids dispensed from the one or more outlets to cause mixing of the one or more fluids for application of the fluids at a treatment site.