US 20060025716 A1
A nozzle for ultrasound wound treatment comprising a main body with proximal and distal ends, a reservoir and valve. The proximal end of the nozzle being removably attached to an ultrasound transducer. The distal end of the nozzle being marginally close and coaxial to the free distal end of the ultrasound transducer. The body of the nozzle connected with liquid reservoir, which holds the wound treatment solution and delivers same to the free end of ultrasound tip directly or through a tube. The nozzle is provided with valve for controlling flow rate of wound treatment solution. The nozzle can mix different liquids or a liquid with a gas and deliver same to the wound surface. The nozzle can also be provided with trigger system for one hand use. The present invention is a device, using ultrasonic waves to create, direct and deliver liquid treatment spray to a wound surface.
44. A method for treating a wound comprising:
providing a transducer having a distal radiation surface in proximity to the surface of the wound for emitting ultrasonic energy;
providing a nozzle having a main body supported by the transducer, the main body having a proximal end that removably attaches to a housing of the transducer, the main body having a distal end positioned at a distance from the distal radiation surface of the transducer, the main body defining an opening for delivering a fluid to the distal radiation surface of the transducer for producing a spray; and
delivering the emitted ultrasonic energy to the wound through the spray.
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53. A wound treatment device for treating a wound, said device comprising:
a transducer having a distal radiation surface for emitting ultrasonic energy; and
a nozzle having a main body supported by the transducer, the main body having a proximal end that removably attaches to a housing of the transducer, the main body having a distal end positioned at a distance from the distal radiation surface of the transducer, the main body defining an opening for delivering a fluid to the distal radiation surface of the transducer for producing a spray, wherein the emitted ultrasonic energy is delivered to the wound through the spray.
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The present invention relates to a device for using ultrasonic waves in wound treatment. More particularly, the present invention relates to a device for spraying a wound surface using ultrasonic waves for delivering drugs, killing bacteria, cleansing a surface, and stimulating healthy tissue cells.
Ultrasonic waves have been widely used in medical applications, including both diagnostics and therapy as well as in many industrial applications. One diagnostic use of ultrasound waves includes using ultrasonic waves to detect underlying structures in an object or a human tissue. In this procedure, an ultrasonic transducer is placed in contact with the object or tissue via a coupling medium and high frequency (1-10 MHz) ultrasonic waves are directed into the tissue. Upon contact with the various underlying structures, the waves are reflected back to a receiver adjacent to the transducer. By comparison of the signals of the ultrasonic wave as sent with the reflected ultrasonic wave as received, an image of the underlying structure can be produced. This technique is particularly useful for identifying boundaries between components of tissue and can be used to detect irregular masses, tumors and the like.
Two therapeutic medical uses of ultrasound waves include aerosol mist production and contact physiotherapy. Aerosol mist production makes use of a nebulizer or inhaler to produce an aerosol mist for creating a humid environment and delivering drugs to the lungs. Ultrasonic nebulizers operate by the passage of ultrasound waves of sufficient intensity through a liquid, the waves being directed at an air-liquid interface of the liquid from a point underneath or within the liquid. Liquid particles are ejected from the surface of the liquid into the surrounding air following the disintegration of capillary waves produced by the ultrasound. This technique can produce a very fine dense fog or mist. Aerosol mists produced by ultrasound are preferred over aerosol mists produced by other methods because a smaller particle size of the aerosol can be obtained with the ultrasonic waves. One of the major shortcomings of inhalers and nebulizers is that the aerosol mist cannot be directed to a target area without an air stream which decreases the efficiency of ultrasound.
Ultrasonic sprayers such as those sold by Sonic and Materials Inc., Misonix Inc., Sono-Tek Inc., and Zervex International, Inc. (see, for example, U.S. Pat. Nos. 4,659,014, 5,104,042, 4,930,700, 4,153,201, 4,655,393, 5,516,043, 5,835,678, 5,879,364, and 5,843,139) operate by passing liquid through a central orifice of an ultrasound instrument-tip. These ultrasonic devices do not have and do not need any removable nozzles to create a liquid spray.
Ultrasonic inhalers and drug delivery systems from Medisonic USA, Inc., 3M, Siemens Gmb, The Procter & Gamble Company, Sheffield Pharmaceuticals, and Aradigm, Inc. (see, for example, U.S. Pat. Nos. 4,294,407, 5,347,998, 5,520,166, 5,960,792, 6,095,141, 6,102,298, 6,098,620, 6,026,808, and 6,106,547) operate by atomizing liquid using piezoceramic film. Although some inhalers and delivery systems use nozzles, the nozzles are just for directing the atomized liquid to the mouth by touching the lips. These nozzles do not create any spray, and the inhaler and drug delivery systems can work without them.
It is an object of this invention to provide an improved device for treating wounds.
It is also an object of this invention to provide an improved device for treating wounds using ultrasonic waves.
It is a further object of the invention to provide a device for creating, directing and delivering liquid aerosol spray to a wound surface.
It is yet a further object of the invention to provide a device for creating ultrasonic waves and delivering drugs, killing bacteria, cleansing a surface, and/or stimulating healthy tissue.
These and other objects of the invention will become more apparent from the more detailed discussion below.
The present invention relates to a device using ultrasonic waves to create, direct and deliver liquid aerosol spray to a wound surface. More particularly, the present invention relates to an emission device comprising a nozzle which is a preferably cylindrical, but optionally can be multiangular, from the inside and is cylindrical, rectangular or multiangular from the outside distal end; a liquid reservoir; and a different shaped proximal end to be removably attached to ultrasound transducer.
The liquid reservoir is provided with a valve, which works as a dispenser and allows liquid to reach the ultrasound tip as drops or via continuous flow through an orifice and a gap.
The proximal end of the nozzle can be connected to the transducer housing in a variety of different ways, such as by threads, bolts or screwed on, snap/friction fit, or by other means.
The liquid reservoir portion of the nozzle can be attached to the top, side, or bottom of the nozzle body or located outside the nozzle body. Liquid from the reservoir may be delivered under gravity, or by motorized pump. The liquid reservoir can be elastic or rigid, with or without a cover, and can be made from a variety of different materials, such as, for example, metal, plastic, rubber, ceramic, or other suitable material, and is provided with metered dose device or a liquid dispenser.
The liquid reservoir can provide the free end of an ultrasound transducer tip with liquid/solution directly from inside the distal end of the nozzle, or through an orifice or a tube from the front end of the nozzle.
The nozzle can be provided with two, three or more reservoirs or tubes, for mixing different liquids, drugs or liquid(s) with gas. For example, saline can be mixed with oxygen and used to treat a wound. Gas and liquid can be delivered separately from the top, side and bottom of the distal end of the ultrasound transducer to be mixed and sprayed on the wound surface.
The valve part of the nozzle can be located between the reservoir and nozzle body, inside of the reservoir, or inside of the nozzle. The nozzle can optionally be provided with a trigger connecting and operating the valve. This design allows a user to operate the device with one hand. The trigger can be located on the top, side or bottom of the nozzle.
The nozzle can work without a valve, if, for example, the reservoir is made from an elastic rubber material. In this case liquid from the reservoir is delivered by squeezing the elastic reservoir.
The main body and distal end of the nozzle may be cylindrical, oval, elliptic, conical, rectangular or multiangular from the inside.
From the outside, the main body and distal end of the nozzle can be any shape such as, for example, a cylinder, cut cylinder, cone, cut cone, concave, double cut, rectangular, multiangular or a combination of these shapes.
The proximal end of the nozzle can be any shape, but must be removably attachable to the ultrasound transducer, for example, via threads, friction fit, screws, slots, spline, or other means.
The shape of the distal end of the nozzle as viewed from the horizontal side can be cylindrical, a cut cylinder, conical, a double cut cylinder or cone, spherical, elliptic/oval or curved, multiangular, waved or a combination of these shapes.
Finally the ultrasound wound treatment nozzle can be comprised of many different parts, such as a body/housing, reservoir, valve, and dispenser, or formed in one solid part.
While the invention has been described in general terms, the construction and obvious advantages of the device will be more clearly understood with reference to the following description of the various specific embodiments when read in conjunction with the accompanying drawings.
The present invention is a device which uses ultrasonic waves to create, direct and deliver liquid spray to a wound surface comprising a nozzle. The nozzle for ultrasound wound treatment includes a nozzle body having a proximal end which can be removably attached to an ultrasound transducer, the distal end of said nozzle body to be adjacent to the ultrasound transducer tip. The nozzle comprises a generally cylindrical main body and a reservoir in which wound treatment liquid/solution is filled and a valve for dispensing and delivering the liquid/solution to the distal end of ultrasound tip.
The invention can perhaps be better appreciated from the drawings. A nozzle for ultrasound wound treatment according to the present invention is illustrated in
Gas and liquid can be delivered separately from the top, side and bottom of the distal end of the ultrasound transducer to be mixed and sprayed on the wound surface. This design allows one to mix different liquids and/or liquids with gas, such as saline or an antibiotic with oxygen during wound treatment, without the use of high pressure, which is required with other mixing methods.
To avoid liquid loss during dispensing, the distance from valve 18 to the distal end of ultrasound transducer tip 20 should be minimized. This means that valve 18 should be located as close as possible to the distal end of the ultrasound transducer tip 20. For this reason, the most preferred location is as shown in
With reference to
The preceding specific embodiments are illustrative of the practice of the invention. It is to be understood, however, that other expedients known to those skilled in the art or disclosed herein, may be employed without departing from the spirit of the invention or the scope of the appended claims.