TREA

Liquid drug transfer devices for failsafe correct snap fitting onto medicinal vials

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Information

  • Patent Grant
  • 8070739
  • Patent Number
    8,070,739
  • Date Filed
    Tuesday, August 8, 2006
    18 years ago
  • Date Issued
    Tuesday, December 6, 2011
    13 years ago
Information
Abstract
Liquid drug transfer devices including a vial adapter designed for failsafe correct snap fitting on a medicinal vial for ensuring flow communication with the vial's interior. The vial adapters include at least two non-adjacent vial retention flex members for snap fitting over a vial opening for vial retention purposes and at least two non-adjacent vial guidance flex members longer than their counterpart vial retention flex members for guiding a vial adapter with respect to a vial prior to snap fitting the vial adapter thereon.
Description
FIELD OF THE INVENTION

The invention pertains to liquid drug transfer devices for snap fitting onto medicinal vials.


BACKGROUND OF THE INVENTION

Medimop Medical Projects Ltd., Ra'anana, Israel (www.medimop.com) supply liquid drug transfer devices for use with medicinal vials containing liquid or powder drug contents and having a vial opening stopped by a typically rubber stopper. Vials are typically available in 13/14 mm and 20 mm standard sizes, and often contain expensive drugs. The liquid drug transfer devices include inter alia vial adapters with single lumen puncturing spikes, vented vial adapters with dual lumen puncturing spikes, fluid control devices illustrated and described in commonly owned PCT International Publication No. WO96/29113, MIX2VIAL® fluid control devices illustrated and described in commonly owned U.S. Pat. No. 6,558,365 to Zinger et al., in-line MIXJECT® fluid control devices illustrated and described in commonly owned PCT International Publication No. WO 2005/105014, and the like. The liquid drug transfer devices are used by both professional users and also home users, for example, young users, visually impaired users, infirm users, and the like, for self-drug administration purposes in the home.


The liquid drug transfer devices include a plastic molded vial adapter with a generally cylindrical skirt for telescopically slidingly receiving a vial opening therein, an integrally formed hollow puncturing spike for puncturing the vial's stopper and having at least one flow aperture towards the puncturing spike's tip for accessing the vial's interior, and at least one access port in flow communication with the puncturing spike. The skirts typically include four or six flex members including at least two non-adjacent vial retention flex members with at least partially circumferentially extending inwardly protruding vial retention ribs for snap fitting over a vial opening for vial retention purposes. The vial retention flex members are designed such that vial adapters cannot be released from a medicinal vial after being snap fitted thereon for sterilization purposes. Flex members not employed for vial retention purposes have smooth inner surfaces for bearing against a vial opening for stabilization purposes. Such vial stabilization flex members are typically of the same length as their counterpart vial retention flex members but maybe shorter, for example, as shown in US Patent Application Publication No. 2003/0199847 to Akerlund et al.


Misalignment of a liquid drug transfer device with respect to a vial results in puncturing difficulties and in some instances its vial adapter's puncturing spike's tip being embedded in the vial's stopper, thereby precluding flow communication with the vial's interior. In such instances, notwithstanding that a vial contains a full dosage of medicament, it is necessarily discarded. It has been long recognized that inaccurate snap fitting of vial adapters on vials can be at least partially contributed to a problematic design feature of medicinal vials described hereinafter. Professional users of liquid drug delivery devices are generally aware of this design feature but are still prone to inaccurately snap fit a vial adapter on a vial due to time pressure, and the like. Home users of liquid drug delivery devices are often not even aware of the design feature and are therefore even more prone to inaccurately snap fit a vial adapter on a vial despite their best efforts.


SUMMARY OF THE INVENTION

The present invention is directed towards liquid drug transfer devices including a vial adapter designed for failsafe correct snap fitting on a medicinal vial for ensuring flow communication with the vial's interior. The vial adapters include at least two non-adjacent vial retention flex members for snap fitting on a vial opening for vial retention purposes and at least two non-adjacent vial guidance flex members longer than their counterpart vial retention flex members for guiding a vial adapter with respect to a vial prior to snap fitting the vial adapter thereon. The vial guidance flex members are designed such that they assist a user to correctly co-axially align a liquid drug delivery device with respect to a vial prior to the former's puncturing spike touches the latter's stopper. Moreover, the vial guidance flex members have the tendency to cause a user to more cautiously approach a snap fitting procedure, thereby considerably assisting in correct snap fittings.





BRIEF DESCRIPTION OF THE DRAWINGS

In order to understand the invention and to see how it can be carried out in practice, preferred embodiments will now be described, by way of non-limiting examples only, with reference to the accompanying drawings in which similar parts are likewise numbered, and in which:



FIG. 1 is a pictorial view of a first preferred embodiment of a liquid drug transfer device with a vial adapter for failsafe correct snap fitting on a medicinal vial;



FIG. 2 is a longitudinal cross section of the liquid drug transfer device and the medicinal vial along line A-A in FIG. 1;



FIG. 3A is a longitudinal cross section demonstrating a liquid drug transfer device off centered with respect to the medicinal vial;



FIG. 3B is a longitudinal cross section demonstrating a liquid drug transfer device angled with respect to the medicinal vial;



FIG. 3C is a longitudinal cross section of the liquid drug transfer device co-axially aligned with respect to the medicinal vial for failsafe correct snap fitting thereon;



FIG. 3D is a longitudinal cross section of the liquid drug transfer device slightly depressed toward the medicinal vial;



FIG. 3E is a longitudinal cross section of the liquid drug transfer device snap fitted on the medicinal vial and in flow communication with the vial's interior;



FIG. 4 is a pictorial view of a second preferred embodiment of a liquid drug transfer device with a vented vial adapter for failsafe correct snap fitting on a medicinal vial; and



FIG. 5 is a pictorial view of a MIXJECT® fluid control device with a vial adapter for failsafe correct snap fitting on a medicinal vial.





DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE PRESENT INVENTION


FIGS. 1 and 2 show a liquid drug transfer device 10 for failsafe correct snap fitting on a conventional medicinal vial 11. The vial 11 has a longitudinal axis 12, a bottle portion 13 containing a liquid drug 14, a vial opening 16, an upper peripheral shoulder 15 and a narrow neck 17 intermediate the upper peripheral shoulder 15 of the bottle portion 13 and the vial opening 16. The vial opening 16 is stopped by a typically rubber stopper 18. The stopper 18 has a circular head 19 and a downward depending tubular section 21 with a blind bore 22 having a cross section area A1 in a transverse direction to the longitudinal axis 12. The vial 11 is hermetically sealed by an aluminum band 23 with a rim 24 having an external diameter D1, and an axially directed peripheral surface 26, and exposing a raised central area 27 of the stopper 18. The stopper's central area 27 has a cross section area A2 in a transverse direction to the longitudinal axis 12 where A2>A1. The design feature A2>A1 contributes to misalignment of a vial adapter with respect to a vial for flow communication purposes because users are under the mistaken impression that they have a larger target area for puncturing purposes than they have in practice.


The liquid drug transfer device 10 includes a plastic molded vial adapter 30 having a longitudinal axis 31, and an upright female Luer connector 32 for receiving a syringe (not shown) and integrally formed with the vial adapter 30. The vial adapter 30 includes a top wall 33 transverse to the longitudinal axis 31, and a substantially cylindrical skirt 34 for telescopically slidingly receiving the vial opening 16 therein. The skirt 34 includes three non-adjacent axially directed vial retention flex members 36 and three non-adjacent axially directed vial guidance flex members 37 resiliently elastically attached to the top wall 33. The guidance flex members 36, 37 form an exterior wall of the vial adapter 30. The vial adapter 30 includes an integrally formed hollow puncturing spike 38 in flow communication with the female Luer connector 32. The puncturing spike 38 has a tip 39 with a flow aperture 41 theretowards.


The vial retention flex members 36 have inside surfaces 36A and outwardly taper to flex member tips 36B with an internal diameter D2>D1 and having a length L1 relative to the top wall 33. The inward surfaces 36A are provided with circumferentially extending inwardly protruding vial retention ribs 36C for snap fitting over the vial opening 16 for vial retention purposes. The puncturing spike's tip 39 downwardly extends slightly past the vial retention ribs 36C such that the puncturing spike's flow aperture 41 resides in a vial's blind bore 22 on snap fitting the liquid rug transfer device 10 on a vial 11. The vial guidance flex members 37 have straight inside surfaces 37A and extend to flex member tips 37B with an internal diameter D3 where D2>D3>D1 and having a length L2>L1 relative to the top wall 33. The flex member tips 37B downwardly extend beyond the flex member tips 36B such that the former contact a band's rim 24 before the puncturing spike's tip 39 contacts the vial's stopper 18 for positively guiding the liquid drug delivery device 10 in concentric alignment with the vial 11.


The failsafe correct snap fitting of a liquid drug delivery device 10 on a vial 11 is now described with reference to FIGS. 3A to 3E: Users are prone to inaccurately align a liquid drug delivery device 10 with respect to a vial 11 either by off centering the liquid drug delivery device 10 (see FIG. 3A) or approaching the vial 11 at an angle (see FIG. 3B). The vial guidance flex members 37 assist a user to co-axially align the liquid drug delivery device 10 relative to the vial 11 such that its flex member tips 37B simultaneously contact the band's rim 24 before its puncturing spike's tip 39 contacts the vial's stopper 18 (see FIG. 3C). Initial depression of the liquid drug delivery device 10 towards the vial 11 causes the vial guidance flex members 37 to flex slightly outward as they travel along the aluminum band's peripheral surface 26 and the puncturing spike's tip 39 to approach the vial's stopper 18 before contacting same at about the same time that the inside surfaces 36B under the vial retention ribs 36C touch the band's rim 24 (see FIG. 3D). Continued depression of the liquid drug delivery device 10 towards the vial 11 causes the vial guidance flex members 37 to slide over the band's peripheral surface 19 and the vial retention flex members 36 to snap fit over the vial opening 16 and the flow aperture 41 to be positioned midway along the stopper's blind bore 22 for effecting flow communication with the female Luer connector 32 (see FIG. 3E). The vial guidance flex members 37 have a length and sufficient flexibility to extend radially outwardly beyond the upper peripheral shoulder 15 of the bottle portion 13 of the vial 11, such that the inside surface 37A of each vial guidance flex member 37 rests against the upper peripheral shoulder 15 and the tip 37B of each vial guidance flex member 37 extends radially outwardly beyond the upper peripheral shoulder 15 and radially outwardly beyond a periphery 33a of the top wall 33 of the vial adapter 30.



FIG. 4 shows a liquid drug transfer device similar 50 in construction and use as the liquid drug transfer device 10 and differing therefrom insofar that the former is vented and includes a vial adapter 51 with two non-adjacent axially directed vial retention flex members 36 and two non-adjacent axially directed vial guidance flex members 37.



FIG. 5 shows a MIXJECT® fluid control device 60 with a detachable vial adapter 61 similar to the vial adapter 30 for failsafe correct snap fitting on a medicinal vial.


While the invention has been described with respect to a limited number of embodiments, it will be appreciated that many variations, modifications, and other applications of the invention can be made within the scope of the appended claims.

Claims
  • 1. Liquid drug transfer device for failsafe correct snap fitting on a medicinal vial having a longitudinal axis and including a bottle portion having an upper peripheral shoulder containing a medicament, a vial opening with a rim and an axially directed peripheral surface and stopped by a stopper, and a narrow neck intermediate the upper shoulder of the bottle portion and the vial opening, the liquid drug transfer device comprising: (a) a vial adapter having a longitudinal axis, and including a top wall transverse to said longitudinal axis, a substantially cylindrical skirt of at least four axially directed flex members resiliently elastically attached to said top wall and downwardly depending therefrom for telescopically slidingly receiving the vial opening therein, and a hollow puncturing spike for puncturing the stopper, said puncturing spike having a tip with at least one flow aperture for accessing the vial's interior,said at least four flex members including at least two non-adjacent vial retention flex members with at least partially circumferentially extending inwardly protruding vial retention ribs a first distance from said top wall for snap fitting over the vial opening for vial retention purposes, and at least two non-adjacent vial guidance flex members longer than said at least two non-adjacent vial retention flex members relative to said top wall for simultaneously contacting the vial opening's rim for aligning said vial adapter with the vial prior to said snap fitting; and(b) at least one access port in flow communication with said puncturing spike, characterized in that said at least four flex members form an exterior wall of the vial adapter, and said two non-adjacent vial guidance flex members have a generally smooth internal surface at said first distance from said top wall and a length and sufficient flexibility to extend radially outwardly beyond the upper peripheral shoulder of the bottle portion of the vial, such that an internal surface of the vial guidance flex members rests against the upper peripheral shoulder and a terminal portion of the vial guidance flex members extends radially outwardly beyond the upper peripheral shoulder and radially outwardly beyond a periphery of the top wall of the vial adapter such that said at least two non-adjacent vial guidance flex members are employed for vial alignment purposes.
  • 2. The device according to claim 1 wherein said skirt includes three non-adjacent vial retention flex members and three non-adjacent vial guidance flex members.
CROSS-REFERENCE TO RELATED APPLICATION

This application is a Section 371 of International Application No. PCT/IL2006/000912, filed Aug. 8, 2006, which was published in the English language on Feb. 15, 2007, under International Publication No. WO 2007/017868 A1, which claims the benefit of U.S. Provisional Patent Application No. 60/707,183, filed Aug. 11, 2005, and the disclosures of which are incorporated herein by reference.

PCT Information
Filing Document Filing Date Country Kind 371c Date
PCT/IL2006/000912 8/8/2006 WO 00 1/8/2009
Publishing Document Publishing Date Country Kind
WO2007/017868 2/15/2007 WO A
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Related Publications (1)
Number Date Country
20090177177 A1 Jul 2009 US
Provisional Applications (1)
Number Date Country
60707183 Aug 2005 US