Medical stopcock, kit comprising such a stopcock, and method for preparing a mixture or an emulsion
Inventors
Assignees
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Publication Number
US-10525251-B2
Publication Date
2020-01-07
Expiration Date
Abstract
A medical stopcock comprising a body provided with at least two female connectors and a male connector; a mobile plug which is mounted in the body, is provided with a rotation lever and comprises a fluid circulation channel; and a reinforcement collar rigidly connected to at least two of the connectors; wherein the reinforcement collar is spaced apart from the body in order to form an openworked zone around the central body.
Core Innovation
The invention relates to a medical stopcock for preparing injectable emulsions. The stopcock includes a body provided with at least two female connectors and a male connector, and a mobile plug mounted in the body, wherein the mobile plug comprises a rotation lever and a fluid circulation channel.
The stopcock further includes a reinforcement collar rigidly connected to at least two of the connectors. The reinforcement collar is spaced apart from the body to form an openworked zone around the body, which reduces stress concentration and shrink-mark formation and reduces leakage and mechanical and chemical brittleness compared with prior plastic stopcocks.
The document also describes additional structural features, including optional finger-grip zones on the collar and visual indicators for plug positioning. It further describes foolproofing for preventing undesired connector communication, including a fool-proofing device on a female connector for an injection syringe with projections and insertion spaces, and compatible fin geometries to avoid misconnection with a mixing syringe.
Claims Coverage
The provided independent claims explicitly cover two inventive features: one directed to a medical stopcock and one directed to preparing an injectable mixture or emulsion.
Medical stopcock with mobile plug and spaced reinforcement collar
A medical stopcock with a body having at least two female connectors and a male connector; a mobile plug mounted in the body, provided with a rotation lever and comprising a fluid circulation channel; and a reinforcement collar rigidly connected to at least two of the connectors, wherein the reinforcement collar is spaced apart from the body to form an openworked zone around the body.
Preparing an injectable mixture or emulsion using mixing syringes and an injection syringe
A method preparing an injectable mixture or emulsion by connecting two mixing syringes to a medical stopcock; mixing an aqueous solution with an oil via reciprocating piston motion through the stopcock; and then connecting an injection syringe and transferring all or part of the resulting mixture or emulsion into it through the stopcock.
The claims center on the stopcock architecture with a mobile plug, fluid circulation channel, and spaced reinforcement collar, together with a preparation method that mixes an aqueous solution with an oil and transfers the resulting mixture or emulsion into an injection syringe.
Stated Advantages
Reduces stress concentration and shrink-mark formation.
Reduces leakage.
Reduces mechanical brittleness and chemical brittleness compared with prior plastic stopcocks.
Allows re-mixing without disconnecting when phase separation occurs.
Documented Applications
Preparing injectable emulsions for transarterial chemoembolization (c-TACE), including emulsions comprising iodinated oil and an anticancer agent.
Use in an associated preparation kit with a stopcock, mixing syringes, and an injection syringe, optionally including a catheter or microcatheter downstream of the injection syringe.
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