Safety dispensing system for hazardous substances
First Claim
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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; and
the 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.
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Abstract
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.
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Citations
23 Claims
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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:
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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; and the 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. - View Dependent Claims (2)
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3. An assembly comprising:
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a valve; a hazardous fluid source in fluid communication with the valve, the hazardous fluid source including hazardous medicine; a flush liquid source in fluid communication with the valve; and a syringe in fluid communication with the valve, the syringe including a distal chamber and a proximal chamber separated by a valved stopper, the syringe being configured to sequentially dispense the contents of the distal chamber and the proximal chamber; wherein the valve moves between a first state where the syringe is in fluid communication with the hazardous fluid source and a second state where the syringe is in fluid communication with the flush liquid source. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. An assembly comprising:
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a valve; a hazardous fluid source in fluid communication with the valve, the hazardous fluid source including hazardous medicine; a flush liquid source in fluid communication with the valve; and a syringe in fluid communication with the valve, the syringe including a distal chamber and a proximal chamber separated by a stopper, the syringe being configured to sequentially dispense the contents of the distal chamber and the proximal chamber; wherein the valve moves between a first state where the syringe is in fluid communication with the hazardous fluid source and a second state where the syringe is in fluid communication with the flush liquid source; and wherein the proximal chamber of the syringe is pre-filled with a flush liquid before the syringe is in fluid communication with the valve. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An assembly comprising:
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a valve; a hazardous fluid source in fluid communication with the valve, the hazardous fluid source including hazardous medicine; a flush liquid source in fluid communication with the valve; a first syringe in fluid communication with the valve; and a multi-chamber syringe in fluid communication with the valve, the multi-chamber syringe including a distal chamber and a proximal chamber, the syringe being configured to sequentially dispense the contents of the distal chamber and the proximal chamber; wherein the valve controls fluid communication between each one of the hazardous fluid source, the flush liquid source, the first syringe, and the multi-chamber syringe and each one of the remaining ones of the hazardous fluid source, the flush liquid source, the first syringe, and the multi-chamber syringe; and wherein the valve moves between a first state where the first syringe is in fluid communication with the hazardous fluid source, a second state where the first syringe is in fluid communication with the multi-chamber syringe, and a third state where the multi-chamber syringe is in fluid communication with the flush liquid source. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification