Dual chamber mixing syringe and method for use

Inactive Publication Date: 2005-08-11
MDC INVESTMENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] In light of the foregoing shortcomings of the prior art and in order to provide an improved syringe, the present invention provides an improved syringe that is operable to mix separate components to prepare a medicinal fluid for use. The syringe is particularly suited to mix drugs having low viscosity and / or low solubility.
[0007] More specifically, the present invention provides a mixing syringe having a housing that includes a first fluid chamber for containing a first component of a medicine. Within the housing is a first plunger having a second fluid chamber for containing a second component of the medicine. Within the first plunger is a second plunger. A seal separates the first and second components, to prevent the components from becoming mixed during storage. Preferably, the syringe also includes a needle and a valve for preventing the discharge of the medicine through the needle while the components are being mixed.
[0010] Another aspect of the invention provides a syringe having two fluid chambers containing two medicinal components and a seal separating the components from one another. A needle is attached to the syringe housing, and a valve controls the flow of fluid from the housing through the needle.

Problems solved by technology

Although such a system works well for mixtures that are highly soluble, they are ineffective for less soluble mixtures.
However, certain components cannot be adequately mixed by simply combining and shaking the two elements together.

Method used

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  • Dual chamber mixing syringe and method for use
  • Dual chamber mixing syringe and method for use
  • Dual chamber mixing syringe and method for use

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0061] Referring now to FIGS. 7-11 an alternative embodiment of a syringe is designated generally 110. The syringe 110 in this alternative embodiment operates substantially similar to the syringe 10 described above. Referring to the previously described syringe, the syringe includes a seal to separate the two components during storage. In the previously described syringe 10 the seal is provided by a pierceable wall or septum 34. However, various alternative sealing elements can be utilized to separate the two components during storage. The alternative embodiment shown in FIGS. 7-11 describes a seal that is different from the seal 34 in the All of the remaining elements in the alternative embodiment are preferably substantially similar to the elements illustrated in FIG. 1-6 and described above.

[0062] The syringe 110 includes a hollow housing 120 having a nozzle 122, a fluid chamber 124, a seal 125 and finger grips 127. Each of these elements is substantially similar to the housing ...

embodiment 110

[0069] The syringe 210 includes a housing 220 having a fluid chamber 224. An outer plunger 230 having a piston 232, plunger rod 235, fluid chamber 237, barbed connector 245, side port 246 and tip 247 that are substantially similar to the piston 132, plunger rod 135, fluid chamber 137, barbed connector 145, side port 146 and tip 147 described above in connection with the previous embodiment 110.

[0070] The syringe further includes an inner plunger having an elongated piston rod and piston seal that are substantially similar to the piston rod and piston of the previous embodiments 52, 54,152,154. In addition, as in previous embodiments, the inner piston forms a fluid-tight seal with the fluid chamber in the outer plunger 230.

[0071] Referring to FIGS. 14-15, the details of the tip of the housing will be described in greater detail. The tip 222 of the housing 220 includes a pair of molded cut-outs so that two radially displaceable arms 223 are formed in the wall of the tip of the housin...

embodiment 410

[0082] Referring now to FIGS. 22-24 a third alternative embodiment of a syringe is designated generally 410. The syringe 410 in this alternative embodiment operates substantially similar to the syringe 10 described above. Referring to the previously described syringe, the syringe includes a seal to separate the two components during storage. In the previously described syringe 10 the seal is provided by a pierceable wall or septum 34. The outer plunger 30 has a piercing element 41 in the form of a needle that is operable to pierce the seal 34. In the present embodiment 410, the outer plunger 430 includes a piercing element 441 in the form of a spear that is operable to pierce the seal. The remaining elements in the alternative embodiment are preferably substantially similar to the elements illustrated in FIGS. 1-6 and described above.

[0083] The syringe 410 includes a hollow housing 420 having a nozzle 422, a fluid chamber 424, and a seal 425. Each of these elements is similar to the...

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PUM

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Abstract

A mixing syringe and method for using the mixing syringe are provided. The mixing syringe comprises a housing having a first compartment for containing a first component, an outer plunger having a second compartment for containing a second component, and an inner plunger. Prior to use, a seal separates the first and second components. To prepare the mixture, the seal is pierced and the two components are mixed. The mixing syringe and its method of use are particularly suited to applications in which at least one of the mixture components is a relatively highly viscous material.

Description

PRIORITY CLAIM [0001] The present application claims priority to U.S. Provisional Application No. 60 / 514,045, filed on Oct. 24, 2003, which is hereby incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention relates devices for mixing two components to form a mixture. More specifically, the present invention relates to a syringe having two chambers for receiving two constituents that are to be mixed, and the method for using such a device. BACKGROUND OF THE INVENTION [0003] Many drugs are stored in separate components that are mixed before use. Typically, the separate components include a powder and a liquid diluent. By storing the components separately, shelf life of the drug is increased. [0004] With many of these drugs, the separate components are stored in a syringe and mixed within the syringe prior to use. The components are stored in separate chambers in the syringe prior to use. To prepare the medicine, the separate components are combined into a s...

Claims

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Application Information

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IPC IPC(8): A61MA61M5/31A61M5/315A61M5/32A61M37/00
CPCA61M5/3137A61M5/31596A61M5/3202A61M2039/229A61M2005/3106A61M2005/3128A61M2005/31598A61M2005/3104A61M5/347
Inventor HARPER, DEREK J.JOHNSON, CHARLES L.KOVALSKI, JOSEPH
Owner MDC INVESTMENT HLDG
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