초록 ▼

A combination of a valve assembly and multi-chamber, sequential delivery syringe is disclosed. The combination effectively provides a safety system for transferring hazardous materials from a vial to a site of use. All potentially hazardous materials are flushed from exposed connecting sites prior t

A combination of a valve assembly and multi-chamber, sequential delivery syringe is disclosed. The combination effectively provides a safety system for transferring hazardous materials from a vial to a site of use. All potentially hazardous materials are flushed from exposed connecting sites prior to disconnections.

대표청구항 ▼

What is claimed and desired to be secured by Letters Patent is: 1. A safety valve apparatus and a multi-chamber dispensing syringe assembly combination for transferring a volume of hazardous fluid from a first source containing the hazardous fluid to the multi-chamber dispensing syringe assembly the

What is claimed and desired to be secured by Letters Patent is: 1. A safety valve apparatus and a multi-chamber dispensing syringe assembly combination for transferring a volume of hazardous fluid from a first source containing the hazardous fluid to the multi-chamber dispensing syringe assembly the combination comprising:the safety valve apparatus comprising a hermetically sealed valve assembly comprising a plurality of sealable exterior access ports;the multi-chamber dispensing syringe assembly comprising a multi-chamber syringe and a pre-flush tube subassembly affixed to a distal end of the multi-chamber syringe, the multi-chamber syringe including a barrel which is divided into a proximal chamber and a distal chamber such that fluid in the proximal chamber is kept separate from fluid in the distal chamber until fluid in the distal chamber is dispensed from the syringe, the multi-chamber dispensing syringe assembly being sealably, but releasably affixed via the pre-flush tube subassembly to a first port from the plurality of sealable exterior access ports;the pre-flush tube subassembly comprising an elongated tube having a releasable, sealing connector, disposed at a distal end thereof, by which the multi-chamber dispensing syringe assembly is affixed to the first port;the proximal chamber of the multi-chamber syringe being filled with liquid to cleanse the sealing connector as fluid is dispensed from the proximal chamber;the first source comprising the hazardous fluid being securely and sealably affixed to a second port from the plurality of sealable exterior access ports;a second source, comprising a flush liquid, affixed to a third port from the plurality of sealable exterior access ports;the hermetically sealed valve assembly further comprising a structure which is displaceable to at least two states where each state provides at least one isolated internal pathway;in a first state, the hermetically sealed valve assembly comprises a first isolated internal pathway which allows fluid to flow between the first and second ports, whereby the hazardous fluid is drawn from the first source through the elongated tube and into the distal chamber of the multi-chamber syringe;in a second state, the hermetically sealed valve assembly comprises a second isolated internal pathway which allows fluid to flow between the first and third ports, whereby the flush liquid is drawn from the second source through the first port to substantially fill the elongated tube after the hazardous fluid is drawn from the first source into the distal chamber of the multi-chamber syringe, thereby cleansing the first port of the hazardous fluid; andthe pre-flush tube subassembly further comprising a clamp disposed about the elongated tube for selectively clamping the elongated tube closed after the flush liquid is drawn into the elongated tube to trap the hazardous fluid between the clamp and the proximal chamber and provide a flushed connection at the first port.