The present invention relates to a connection site for a medical device having a neck element with at least one guiding track. The guiding track has a lock edge for cooperative engagement with a lock protrusion of a second medical device.
Administration of hazardous medicaments such as cytotoxins and the like has long been a nuisance to the personal which on daily basis administrate the hazardous medicaments. During preparation of medicaments, administration or after treatment, nursing personal is exposed to the risk of contamination from the hazardous medicaments. Such contamination may be in the form of liquid, aerosols, or vapours, medicaments, derived from spillage due to ill handling or just wrong handling of equipments or instruments. Leakage from technical equipment which has been used right is however also a problem, even if leakage occur in very small doses. Due to long exposure to hazardous medicaments nursing personal can still be ill from very small quantities of hazardous medicaments. It is therefore important to minimize leakage and minimize the risk of leakage.
One specific hazardous step is when e.g. nursing personal is transferring a medicament from one fluid container to another; such transfer usually involves the use of a piercing member such as a needle. To protect the nursing personal involved, piercing member protection devices are commonly used. Such devices are arranged to protect the user, not only from contamination but also from accidentally piercing themselves or any other third persons. One example of such piercing member protection device, having a needle, is disclosed in U.S. Pat. No. 4,564,054 (Gustavsson).
Piercing devices, such as the ones described in the U.S. Pat. No. 4,564,054 (Gustavsson) generally requires a mating connector or adaptor to enable assembly with a vial to prevent leakage. To enable a firm connection with e.g. piercing devices, medical device connectors, also referred to as medical device adaptors, has been developed. It has been found that the connection site on medical devices comprising a neck element with guiding tracks having a locking edge to establish a good connection with a medical device is generally not good to use with second connection sites having threads or a engage/disengagement arrangement which operates by a turning motion. As both connection sites use a turning motion to connect or disconnect, such turning motion could accidentally disconnect a medical device to the medical device connector.
It is the objective of the present invention to remove or reduce the at least one of the above mentioned drawbacks. This is at least partly done by a first medical device comprising a first connection site for connecting a second medical device. The first connection site comprises at least one guiding track. The at least one guiding track is arranged with a surface comprising a locking edge. The locking edge is arranged to cooperate with a lock protrusion on the second medical device. The locking edge extends between a first and a second level. The locking edge further extends as a smooth curvature between the first and the second level, the curvature of which is a function of at least one radius. The present invention provides for easy usage of a medical device connector which can be smoothly connected or disconnected, locked or unlocked. The radius is preferably about 1-10 mm, more preferably 2-8 mm or even more preferably 3-5 mm.
The medical device can be a medical device connector in which the medical device connector comprises a neck element, such as a cylinder like neck element, extending from a base member for receiving parts of said second medical device; the neck element comprises the at least one guiding track. Optionally the medical device can be a piercing member protection device. The guiding track 12 can in an embodiment be arranged on a sleeve member arranged in a telescopically manner with a second sleeve member.
In an embodiment according to the present invention, the distance between the first and the second level is between about 0.2-3.0 mm, preferably between 0.2-1.0 mm.
In an embodiment according to the present invention, the locking edge extends in a smooth curvature between the first and the second level. The curvature of which is a function of one radius, i.e. only one radius.
The guiding track of the neck element usually comprises a vertical section and a horizontal section arranged substantially perpendicular to the vertical section, and the horizontal section can comprise a distal and proximal surface, a first and a second vertical surface. It should be noted however that these two sections can in an embodiment be arranged with an angle of between about 45-135° with respect to each other.
The radius has advantageously a centre of origin positioned at a distance from the second vertical surface of the guiding track. The distance is advantageously adapted to be between about 3-20 mm. The smooth curvature is preferably initiated from a distance of 1-6 mm, preferably between 2-5 mm from the second vertical surface of the guiding track. In the shown embodiment the distance e is about 2.6 mm. This provides enough space for a lock protrusion of a mating medical device while at the same time keeping the lock protrusion snugly fitted in the guiding track.
The medical device connector can be arranged with at least two connection sites, e.g. it may comprise a second connection site for connecting to two medical devices. The second connection site can comprise threads, and in an embodiment be a male or female luer lock coupling.
In an embodiment according to the present invention, the medical device is a piercing member protection device comprising at least one guiding track. The piercing member protection device is preferably telescopically arranged, i.e. having a first member and a second member being telescopically arranged with respect to each other. The telescopically function enables the piercing member to function between two positions in which the piercing member is either exposed or not exposed. The medical device can comprise a barrier member arranged to cooperate with the lock protrusion of the second medical device so as to exert a force component to the second medical device.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods and materials similar or equivalent to those described herein can be used to practice the invention, suitable methods and materials are described below. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety. In case of conflict, the present specification, including definitions, will control. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting.
Other features and advantages of the invention will be apparent from the following detailed description.
The present invention will de described in greater detail with reference to the accompanying figures in which;
a-2c show the medical device connector from
d shows two medical device connectors, as shown in
a-4b shows parts of the guiding track of the medical device connector as shown in
By the term “medical device” is meant a device used in hospital environments, nursing environments or care taking environments usually by qualified personnel such as doctors, nurses or the like. Such environments generally have high requirements regarding hygiene, personal care, and a strive towards low risk for contaminations. Typical medical devices are needles, syringes, piercing member protection devices, vials, infusion bags, infusion sets, administration systems, adapters, tubes, medical device connectors for connecting or adapting different medical devices to each other, or the like.
a-2c show the medical device connector 1 in different views, the same feature is indicated with the same reference numeral.
A plurality of flanges 40 extends from the base member 30. The embodiment shown in
a shows a view towards the second flange 42 and the two grip members 53, 54 of the second flange 42. Each grip member 50 of the medical device connector 1 comprises a proximal end P and a distal end D, in
Between each adjacent grip member 52, 53 of separate flanges 41, 42, four bridge sections 60 are provided. As is noticed, the bridge sections extend from the distal ends of the grip members and thereby connect the distal ends 52D, 53D of the grip members 52, 53 of separate flanges 41, 42. Each bridge section 60 comprises a wedge portion 61 enabling a snap on function to the vial 1 shown in
The distance between the proximal ends is smaller than the distance between the distal ends of the grip members. This provides for grip members having a somewhat tilted appearance and extending in a non parallel direction with respect to the centre axis A. This enables a plurality of medical device connectors 1a, 1b to be stacked in a relatively compact manner, as shown in
Intersecting with the centre axis A is a through going aperture 13 arranged to permit a needle of the piercing device 3 to extend therethrough after assembly and during use. A barrier member 14 made from e.g. silicone rubber material or a thermoplastic elastomer (TPE) is arranged to seal around such needle during use and to seal after use. The barrier member 14 covers the through going aperture.
Turning back to
a-4b show an enlargement of parts of the neck element 11 and one of the guiding tracks 12 of the first connection site 10 of the medical device connector 1 seen in
The arrows X, Y, shown in
In
The horizontal section 81 of the guiding tracks 12 comprises a distal surface 16, a proximal surface 17, a first and a second vertical surface 18, 19, the distal surface 16 being further away from the base member 30, than the proximal surface 17. The locking edge 15 has a radius curvature, illustrated by arrow Ra in
The distal surface 16 of the guiding tracks 12 is further arranged with an angle c, as indicated in
As the lock protrusion 4 passes the locking edge 15, the upward force component forces a distal surface 7 of the lock protrusion 4 against the distal surface 16 of the guiding track 12 and thus keeps it in a locked position.
The smooth curvature of the locking edge 15 enables a user to smoothly unlock, or more accurately, to smoothly pass the lock protrusion across the raised barrier which the locking edge 15 is composed of; thus enabling the unlocking of the piercing device from the first connection site of the medical device connector 1 to be performed simply, yet providing an effective locking function.
The present invention can be applied on a plurality of medical device connectors.
The sleeve member 202 comprises at least one guiding track 12, preferably two guiding tracks 12. The guiding tracks 12 are arranged symmetrically on the side of eth sleeve 202 and are formed in the sleeve 202.
The barrier member 6 of the piercing member 200, and the barrier member 14 of the medical device connector 1, is arranged to cooperate with the said lock protrusions 4 of said second medical device 3, 300 so as to exert a force component to said second medical device. The force component helps to keep the lock protrusion in a locked position when the medical device has been connected to the second medical device. The medical device can be a piercing member free medical device, i.e. a medical device for e.g. transferring fluid between two vials without the use of e.g. a needle.
It is to be understood that while the invention has been described in conjunction with the detailed description thereof, the foregoing description is intended to illustrate and not limit the scope of the invention, which is defined by the scope of the appended claims. Other aspects, advantages, and modifications are within the scope of the following claims.
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