as used herein , the terms fluid or fluids refer to any a substance , as a liquid or gas , that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape . the terms fluid and fluid may also include delivery forms typically used for topical administration , such as encapsulated and packaged liquid suspensions or emulsions , powders , creams , salves , serums , ointments and the like . the terms fluid , adhesive , medicine or medication may be singular or plural and are used interchangeably herein . as used herein , the terms fluid , medicine and or medication refer to prescription and over - the - counter medications , dietary supplements such as vitamins , minerals or cosmetic products . further , the terms fluid , medicine and or medication refer to any product contained in an ampule form which the user has a need or desire to use in a user controlled application . as used herein , an ampule or ampoule or phial is defined as a sealed vial made of glass , plastic or other material that contains a fluid , such as and adhesive or a sterile medicinal solution or a powder to be made into a solution for subcutaneous , intramuscular , or intravenous injection . an ampule can be a small , hermetically sealed flask or container made of glass or polyethylene , e . g ., one containing adhesive for topical administration . one embodiment of the present invention is the actabond ™ topical skin adhesive applicator . the applicator is designed to store and easily express topical skin adhesive formulations used for the closure of surgical wounds from incisions or lacerations caused from trauma . in this embodiment , the applicator is a single use applicator that is ergonomically designed for human factors . such factors allow a surgeon or medical professional to control the application of adhesive , as well as varying amounts of formulation to be expressed for creating thin or narrow applications . as shown in fig1 - 5 , one non - limiting embodiment of the applicator 100 includes a cover 4 . the cover includes an aperture 6 such that a plunger 8 can be fitted telescopically within the aperture . plunger 8 has a cylindrical body comprising a first end 10 and a second end 11 . the first end 10 of the plunger can be easily depressed with for example , thumb pressure to allow the plunger to slide within the cover 4 . ampule 12 is housed within the cover 4 in a collinear arrangement with the longitudinal axis of the plunger 8 and the device 100 . the second end 11 of the plunger 8 is disposed such that force applied to the first end of the plunger will result in application of the force from the second end of the plunger 8 to the ampule 12 . the ampule 12 is filled with a fluid ( not shown ) and includes a foil lid 14 to store a fluid , such as an adhesive formulation . thus , the ampule 12 is in proximity to the second end 11 of the plunger . the cap 16 includes a cutter 17 and an internal channel or cannula 18 . the cap is aligned to be collinear with the foil lid 14 of the ampule 12 . bulb 20 includes a wall 22 , a reservoir 24 and an expression tip 26 having an aperture 28 . the bulb is used to store released fluid and for expression of a fluid out of the device 100 and , for example , onto a wound . the abovementioned components , as shown in fig1 - 5 , can be arranged such that they can telescope into an easy assembled fluid applicator 100 . the user receives the applicator 100 with the plunger 8 in the “ ready ” position . by using the same thumb or finger action as clicking a pen , the user presses down on the first end of plunger 8 to activate the applicator . the plunger slides with respect to the cover 4 such that the second end of the plunger forces the foil lid 14 of the ampule 12 against the cutter 17 . the plunger 8 is then flush with the cover 4 , thus indicating the device has been activated . in this way , a user can easily see that the device is active thus eliminating the risk for reuse which can be unsafe to a patient or recipient of the fluid . the pressure generated from the plunger 8 forces the ampule 12 against the cutter 17 , and causes the cutter 17 to cut the foil lid 14 of the ampule 12 and allows the fluid formulation to travel through the channel 18 into the reservoir 24 . as described above , a user can use a motion similar to that of activating a pen , that is , a thumb or finger motion that causes the plunger to move from a first undispensed position to a second dispensed position . in addition to the configuration shown in fig3 - 4 , the cutter can be made in a plurality of configurations including one or more cutting blades , or edges or protrusions , such that pressure on the plunger 8 causes the cutter 17 to penetrate or puncture the ampule cover . further , the ampule lid or cover 14 may be foil or any other material that can be punctured by a cutter . when the cutter punctures the sealed ampule , the fluid in the ampule flows through the puncture cap . as shown in fig4 , the cap 16 includes a channel 18 in the form of a tube having a circular cross - section . other configurations , such as a cup having two or more channels may be utilized in the present invention . the number and geometry of the channels can be adjusted , depending on , for example , the viscosity of the fluid , to allow fluid to flow from a first storage area , such as an ampule , to a usage area , such as a reservoir . the bulb 20 accumulates the fluid that is forced from the ampule 12 into the reservoir 24 . a user can apply a plurality of pressures to the fluid in the reservoir by squeezing the bulb , thus expressing the fluid or fluid formulation out of the aperture 28 of the bulb . by using a plurality of pressures and holding the applicator at different distances from the wound or other area requiring treatment , a user can determine the size and length of the fluid applied . in addition , a user can utilize the curved tip 30 of the bulb to smooth or apply the expressed fluid formulation as needed . the components of the applicator can be molded or fabricated from any suitable durable structural material , for example , a polymeric material or combination of polymers , or metallic materials , or ceramic material , or combinations thereof . suitable materials and manufacturing methods will be well known to those skilled in the art of packaging or medical devices . most of the components can be manufactured using injection molding or any other suitable polymer processing method or combination of methods . a plurality of applicator geometries , cutter configurations , and bulb configurations are contemplated within the scope of the present invention . nothing in this disclosure is intended to limit the size of the applicator . although the invention herein has been described with reference to particular embodiments , it is to be understood that these embodiments are merely illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the disclosure herein .
fluid applicators utilizing a cutter and an ampule containing fluids , such as topical adhesives , and methods for safe , sterile , one - time use of fluid applicators for expressing fluids , such as wound sealing adhesives , are provided .