Abstract:
A device and method are provided for clearing obstructions in a body cavity opening behind which a volume of fluid has been accumulated comprising a housing having a longitudinal internal conduit having an end interconnected to a suction source and a motor mechanically interconnected to a second end attachment portion and adapted to impart vibratory movement thereto. Actuation of the motor imparts vibratory movement to the second end attachment portion, and thereby to an attached tip and, when a housing first attachment portion is interconnected to a suction source, suction and vibration are simultaneously applied to the tip second end. Thus, when the tip second end is applied against an obstructed body cavity opening, the vibration acts to break up the obstruction and the suction contemporaneously acts to withdraw the accumulated fluid from the body cavity.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of U.S. Provisional Application No. 60/232,306, filed Sep. 12, 2000. 
    
    
     BACKGROUND OF INVENTION 
     1. Field of the Invention 
     This invention relates to an apparatus and a method for draining the eustachian tube and middle ear of fluid when there is a blockage of the opening of the eustachian tube in the nasopharynx region of the throat. 
     2. Related Art 
     Referring to FIGS. 1-2, the ear  10  is divided into three parts: an external ear  12 , a middle ear  14  and an inner ear  16 . The external ear  12  consists of an auricle  18  and ear canal  20  that gather sound and direct it towards a tympanic membrane  22  (also referred to as the eardrum) located at an inner end  24  of the ear canal  20 . The middle ear  14  lies between the external and inner ears  12  and  16  and is connected to the back of the throat by a eustachian tube  26  which serves as a pressure equalizing valve between the ear  10  and the sinuses. The eustachian tube  26  terminates in a distal opening  28  in the nasopharynx region  30  of the throat  32 . In addition to the eardrum  22 , the middle ear  14  also consists of three small ear bones (ossicles): the malleus  34  (hammer), incus  36  (anvil) and stapes  38  (stirrup). These bones  34 - 38  transmit sound vibrations to the inner ear  16  and thereby act as a transformer, converting sound vibrations in the canal  20  of the external ear  12  into fluid waves in the inner ear  16 . These fluid waves stimulate several nerve endings  40  that, in turn, transmit sound energy to the brain where it is interpreted. 
     The eustachian tube  26  is a narrow, one-and-a-half inch long channel connecting the middle ear  14  with the nasopharynx  30 , the upper throat area just above the palate, in back of the nose. The eustachian tube  26  functions as a pressure equalizing valve for the middle ear  14  which is normally filled with air. When functioning properly, the eustachian tube  26  opens for a fraction of a second periodically (about once every three minutes) in response to swallowing or yawning. In so doing, it allows air into the middle ear  14  to replace air that has been absorbed by the middle ear lining (mucous membrane) or to equalize pressure changes occurring on altitude changes. Anything that interferes with this periodic opening and closing of the eustachian tube  26  may result in hearing impairment or other ear symptoms. 
     Obstruction or blockage of the eustachian tube  26  results in a negative middle ear pressure  14 , with retraction (sucking in) of the eardrum  22 . In adults, this is usually accompanied by some ear discomfort, a fullness or pressure feeling and may result in a mild hearing impairment and head noise (tinnitus). There may be no symptoms in children. If the obstruction is prolonged, fluid may be drawn from the mucous membrane of the middle ear  14 , creating a condition we call serous otitis media (fluid in the middle ear). This occurs frequently in children in connection with an upper respiratory infection and accounts for the hearing impairment associated with this condition. 
     A lining membrane (mucous membrane) of the middle ear  14  and eustachian tube  26  is connected with, and is the same as, the membrane of the nose  42 , sinuses  44  and throat  32 . Infection of these areas results in mucous membrane swelling which in turn may result in obstruction of the eustachian tube  26 . This is referred to as serous otitis media, i.e., essentially a collection of fluid in the middle ear  14  that can be acute or chronic, usually the result of blockage of the distal opening  28  of the eustachian tube  26  which allows fluid to accumulate in the middle ear  14 . In the presence of bacteria, this fluid may become infected leading to an acute suppurative otitis media (infected or abscessed middle ear). When infection does not develop, the fluid remains until the eustachian tube  26  again begins to function normally, at which time the fluid is absorbed or drains down the tube into the throat  32  through the eustachian tube opening  28 . 
     Chronic serous otitis media may result from longstanding eustachian tube blockage, or from thickening of the fluids so that it cannot be absorbed or drained down the eustachian tube  26 . This chronic condition is usually associated with hearing impairment. There may be recurrent ear pain, especially when the individual catches a cold. Fortunately, serous otitis media may persist for many years without producing any permanent damage to the middle ear mechanism. The presence of fluid in the middle ear  14 , however, makes it very susceptible to recurrent acute infections. These recurrent infections may result in middle ear damage. 
     When the eustachian tube  26  contains a build-up of fluid, a number of things will occur. First, the body absorbs the air from the middle ear  14 , causing a vacuum to form which tends to pull the lining membrane and ear drum  22  inward causing pain. Next, the body replaces the vacuum with more fluid which tends to relieve the pain, but the patient can experience a fullness sensation in the ear  10 . Treatment of this condition with antihistamines and decongestants can take many weeks to be fully effective. Finally, the fluid can become infected which is painful and makes the patient feel ill and may not be able to hear well. If the inner ear  14  is affected, the patient may feel a spinning or turning sensation (vertigo). The infection is typically treated with antibiotics. 
     However, even if antihistamines, decongestants and antibiotics are used to treat an infection or other cause of fluid build-up in the middle ear  14 , these treatments will typically not immediately resolve the pain and discomfort caused by the buildup of fluid in the middle ear  14 , i.e., the most immediate relief will be felt by the patient if the fluid can be removed from the eustachian tube  26 . 
     Antibiotic treatment of middle ear infections typically result in normal middle ear function within three to four weeks. During the healing period, the patient can experience varying degrees of ear pressure, popping, clicking and fluctuation of hearing, occasionally with shooting pain in the ear. Resolution of the infection occasionally leaves the patient with uninfected fluid in the middle ear  14 , localized in the eustachian tube  26 . 
     Fluid build-up caused by these types of infections has been treated surgically in the past. The primary objective of surgical treatment of chronic serous otitis media is to reestablish ventilation of the middle ear, keeping the hearing at a normal level and preventing recurrent infection that might damage the eardrum membrane and middle ear bones. 
     For example, as shown in FIG. 3, a myringotomy can be performed to relieve fluid in the middle ear  14 . A myringotomy is an incision  42  in the eardrum  22  performed to remove fluid in the middle ear  14 . A hollow plastic tube  44 , referred to as a ventilation tube, is inserted and lodged in the incision  42  to prevent the incision  42  from healing and to insure ventilation of the middle ear  14 . The ventilation tube  44  temporarily takes the place of the eustachian tube  26  in equalizing the pressure in the middle ear  14 . The ventilation tube  44  usually remains in place for three to nine months during which time the eustachian tube  26  blockage subsides. When the tube  44  dislodges, the eardrum  22  heals; the eustachian tube  26  then resumes its normal pressure equalizing function. 
     Another method of relieving the pressure in the middle ear  14  is shown in FIG. 4 in which a hypodermic needle  46  is driven through the eardrum  22  through which any accumulated fluid can be withdrawn from typically only the upper portion of the eustachian tube  26 . 
     The methods of FIGS. 3 and 4 involve rupturing the eardrum  22  to relieve the fluid accumulation and pressure increase in the middle ear. Neither of these methods, in addition to the sometimes permanent puncture created in the eardrum  22 , is especially effective in removing all of the fluid in the eustachian tube  26  since often the lower end  28  thereof is blocked and dammed with fluid. 
     In connection with the above surgical treatments of FIGS. 3 and 4, eustachian tube  26  inflation is also employed to relieve the pressure build-up and fluid accumulation as shown in FIG.  5 . The hypodermic syringe  46  (shown with a flexible tip  48 ) is inserted into a nostril or into the mouth until the tip  48  is positioned adjacent the distal opening  28  of the eustachian tube  26  in the nasopharynx region  30  of the throat  32 . Air is blown through the tip  48  via the syringe  46  into the obstructed eustachian tube  26  and, thus, into the middle ear  14  to help relieve the congestion and reestablish middle ear ventilation. This procedure is often referred to as politzerization. Politzerization is most effective when one of the nostrils is pinched shut (as shown in FIG.  6 ), while the patient simultaneously swallows. This forces air into the eustachian tube  26  and the middle ear  14 . This technique is good for opening the eustachian tube  26  but it does not clear accumulated fluid away. 
     Another method for clearing the middle ear  14  (at least temporarily) is referred to as the “valsalva” maneuver accomplished by forcibly blowing air into the middle ear  14  while holding the nose, often called popping the ear. This method is also good for opening the eustachian tube  26  but it does not clear the accumulated fluid away either. 
     Physicians in alternative medicine have had success draining the eustachian tube and middle ear by inserting a finger  50  into the back of the throat  32  and massaging the opening  28  of the eustachian tube  26  for a predetermined period of time. This seems to unblock the opening  28 , allowing the eustachian tube  26  to drain down the throat  32  into the patient&#39;s esophagus—thus, this method also does not clear the accumulated fluid. 
     Thus, the prior art methods for relieving the pain of the build-up of fluid caused by middle ear  14  infections all fall short by not providing a convenient method to both unobstruct the blocked eustachian tube  26  opening  28  and to simultaneously clear away the accumulated fluid as it drains from the suddenly-opened opening  28  of the eustachian tube  26 . 
     SUMMARY OF INVENTION 
     The device of the present invention consists of an attachment to a medical suction unit which consists of a handle with controls and a rigid tube that has a curve in it to reach the opening of the eustachian tube from the mouth. The semi rigid tube can be either disposable or non-diposable and can be made in different sizes. The end of the tube may be nobbed for rubbing against the opening of the eustachian tube. The handle has controls for the suction, lighting, a spray device for medications, visualization, and vibration. The handle could also have no controls, with the controls being with the main unit. The device can also be made without a handle, if only suction is required. In another embodiment, there is only a handle with vibration and other features but no suction. 
     The method consists of inserting the device, with or without a pre-spray of topical anesthesia, through the open mouth and into the pharynx. With the help of the curve in the tube the tip of the device may be placed against or adjacent to the opening of the eustachian tube. If optics are used for visualization, this helps to guide the end of the device into place. The light source attached to the device also aids in this procedure, but a separate light source may also be used. Once the device is in position, treatment consists of either suction of secretions, or vibration, or both. The procedure may be repeated several times if necessary. As the opening of the eustachian tube begins functioning properly, suction may be applied directly into the eustachian tube to clear the fluid there, or the fluid may be allowed to drain freely. At any time during the procedure or afterwards, medications may be sprayed directly onto the walls of the phayrnx or on the opening of the eustachian tube. 
     This method is better than previous technology because it is more effective at opening the eustachian tube and simulataneously collecting fluids draining from the suddenly-opened eustachian tube and far less invasive and permanently destructive than prior surgical methods. 
     In one aspect, the invention relates to a device for clearing obstructions in a body cavity opening behind which a volume of fluid has been accumulated comprising: a housing having a longitudinal internal conduit, the internal conduit terminating at a first end and a second end, the first and second ends having attachment portions thereon, the attachment portion at the first end being adapted to be interconnected to a suction source; a motor mechanically interconnected to the second end attachment portion and adapted to impart vibratory movement to the second end attachment portion; an elongated tip having a first end and a second end, each of the first and second ends having an opening therein, the tip having a longitudinal internal conduit extending between the openings in the first and second ends of the tip, the first end of the tip being mounted to the attachment portion at the housing second end wherein the internal conduit of the tip is in fluid communication with the longitudinal conduit of the housing; whereby actuation of the motor imparts vibratory movement to the second end attachment portion, and thereby to the attached tip and, when the housing first attachment portion is interconnected to a suction source, suction and vibration are simultaneously applied to the tip second end and, thus, when the tip second end is applied against an obstructed body cavity opening, the vibration acts to break up the obstruction and the suction contemporaneously acts to withdraw the accumulated fluid from the body cavity. 
     The body cavity can comprise a eustachian tube and the opening can comprise an opening in the nasopharynx region of a human throat. The tip can have a curved portion therein between the first and second ends therein. The second end of the tip can be positioned transversely with respect to the first end of the tip. A valve can be provided for controlling the flow of fluid through the longitudinal conduits of the tip and the housing. 
     In another aspect, the invention relates to a method for clearing obstructions in a body cavity opening behind which a volume of fluid has been accumulated comprising: applying mechanical vibration to the obstructed body cavity opening to reopen the body cavity opening; and applying suction to the obstructed body cavity opening generally contemporaneously with the vibration application step to withdraw fluid that has accumulated behind the obstruction. 
     The step of applying vibration and the step of applying suction can be performed by a single device. The body cavity can comprise a eustachian tube and the opening comprises an opening in the nasopharynx region of a human throat. A housing can have a longitudinal internal conduit, the internal conduit can terminate at a first end and a second end, the first and second ends can have attachment portions thereon, the attachment portion at the first end can be adapted to be interconnected to a suction source; a motor can be mechanically interconnected to the second end attachment portion and adapted to impart vibratory movement to the second end attachment portion; an elongated tip having a first end and a second end, each of the first and second ends can have an opening therein, the tip having a longitudinal internal conduit extending between the openings in the first and second ends of the tip, the first end of the tip being mounted to the attachment portion at the housing second end wherein the internal conduit of the tip is in fluid communication with the longitudinal conduit of the housing; whereby actuation of the motor imparts vibratory movement to the second end attachment portion, and thereby to the attached tip and, when the housing first attachment portion is interconnected to a suction source, suction and vibration are simultaneously applied to the tip second end and, thus, when the tip second end is applied against an obstructed body cavity opening, the vibration acts to break up the obstruction and the suction contemporaneously acts to withdraw the accumulated fluid from the body cavity. 
     Other objects, features, and advantages of the invention will be apparent from the ensuing description in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 is a cross section of a human ear showing the inner, middle and outer ear portions and the eustachian tube connecting the middle ear with the nasopharynx region of the throat via a distal opening thereof. 
     FIG. 2 is a cross section of a human head showing the nasopharynx region of the throat illustrated in FIG. 1 containing the distal opening of the eustachian tube illustrated in FIG.  1 . 
     FIG. 3 is a cross section of a human ear in the orientation shown in FIG. 1 showing a prior art surgical method for relieving fluid in the middle ear in which a ventilation tube is lodged within an incision in the eardrum. 
     FIG. 4 is a cross section of a human ear in the orientation shown in FIG. 1 showing a prior art surgical method for relieving fluid in the middle ear in which a syringe is shown having a needle perforating the eardrum. 
     FIGS. 5-6 show a cross section of a human head in the orientation shown in FIG. 2 showing a prior art politzeration method for relieving fluid in the middle ear in which a syringe is shown having a flexible tip extending into the nose and/or throat area so that the tip abuts the distal opening of the eustachian tube while the nose is plugged. 
     FIG. 7 is a cross section of a human head in the orientation shown in FIG. 2 showing a prior art alternative medicine method for relieving fluid in the middle ear in which a physician&#39;s finger massages the distal opening of the eustachian tube. 
     FIG. 8 is a device for simultaneously applying vibration to a blocked eustachian tube via a tip thereon while suctioning fluids accumulated therein through the tip according to the present invention. 
     FIG. 9 is the device illustrated in FIG. 8 showing the device interconnected to a medical suction source and a motor that provides vibration to the tip of the device for applying the vibration to the blocked eustachian tube opening. 
     FIG. 10 is a cross section of a human head in the orientation shown in FIG. 2 wherein the device of FIGS. 8-9 has been inserted into the patient&#39;s mouth so that the tip is positioned against the eustachian tube opening in the nasopharynx region of the throat and applies vibration and suction thereto. 
     FIG. 11 is a cross sectional view taken along lines  11 — 11  of FIG. 10 also illustrating the positioning of the tip of the device of FIGS. 8-9 against the eustachian tube opening according to the invention. 
    
    
     DETAILED DESCRIPTION 
     Referring now to FIGS. 8-11 and to FIGS. 8-9 in particular, a device  100  is shown comprising a housing  102  having an elongated tip  104  extending therefrom. The device  100  overcomes the limitations of prior art methods of relieving fluid accumulation in the middle ear by simultaneously applying vibration to a blocked eustachian tube via the tip  104  thereon while suctioning fluids accumulated therein through the tip  104 . 
     The housing  102  of the device  100  comprises an elongated member adapted to be grasped by a user, such as a medical doctor or alternative medicine practitioner. The housing  102  can be provided with a control panel  106  having one or more buttons thereon for controlling various features of the device  100 . For example, one button on the control panel  106  can be a conventional power switch, another button can selectively interconnect a suction source to the tip  104 , another button can actuate a spray nozzle (not shown) to apply an anesthetic spray from an end of the housing  102 , another button can actuate a light directly attached to or adjacent the housing  102  to direct light toward the end of the tip  104  to assist the user in viewing the interior of the patient&#39;s mouth. The housing  102  has a first end  108  onto which the tip  104  is attached and a second end  110  onto which a conduit attachment  112  is mounted. 
     The tip  104  is a resilient, flexible member having an elongated portion  114  attached at one end to the first end  108  of the housing  102  and terminating at a second end in a transversely-curved portion  116 . The curved portion  116 , in turn, preferably terminates in a distal end  118  having a textured surface  120 . The textured surface  120  preferably has a knurled, knobby, or otherwise continuous or discontinuous pattern of indentations and protrusions adapted to increase friction and agitate a surface against which the textured surface  120  is abutted. 
     The tip  104  further has an internal longitudinal conduit  122  extending from an opening  124  in the textured surface  120  of the distal end  118  of the tip to the interconnection with the first end  108  of the housing  102 . The longitudinal conduit  122  is then fluidly interconnected to a second longitudinal conduit  126  extending through the housing  102  and terminating at the second end  110  thereof. The longitudinal conduit  126  of the housing  102  is also fluidly interconnected with the conduit attachment  112 . The conduit attachment  112  is any of many well-known devices for attachment of a flexible conduit to a housing such as a quick-connect mounting nut, a threaded nut which threads onto a threaded shaft on the housing, etc. 
     The device  100  is adapted, via the conduit attachment  112 , to be fluidly interconnected to a well-known source of suction for medical purposes, such as a vacuum  128 , via a length of tubing  130  as shown in FIG. 9. A selective actuator for selectively interconnecting the vacuum  128  with the opening  124  in the distal end  118  of the tip  104 , such as a valve  132 , can be provided on any of the vacuum  128 , tubing  130 , or the first or second longitudinal conduits  122  and  126 , respectively. Preferably, the valve  132  is provided on the longitudinal conduit  126  in the housing  102  and is interconnected to an actuator on the control panel  106  so that the user can selectively control the application of suction to the opening  124  on the distal end  118  of the tip  104 . It will also be understood that the device  100  can be attached to a conventional medical suction unit that is well known in the art. 
     Preferably, the tip  104  is releasably interconnected to the housing  102  by a mounting flange  134 . This releasable mounting of the tip  104  to the housing  102  provides several benefits among which are maintaining sterility in the operation of the device since the tip  104  can thereby be provided as a single-use member that can be disposed after use. The mounting flange  134  is preferably mechanically interconnected to a motor  136  via a conventional mechanism adapted to convert motion provided by the motor  136  into vibratory articulation of the tip  104 , and preferably vibratory articulation of the distal end  118  of the tip  104 . It will be understood that the motor  136  can be operably interconnected to the control panel  106  for selective operation of the motor  136 , and thereby the selective application of vibration to the tip  104 . 
     The tip  104  is preferably a single-use disposable member made from a resilient synthetic resin material and preferably has sufficient rigidity to allow the user to abut the distal end  118  of the tip  104  against an obstructed body cavity opening, such as an obstructed eustachian tube opening  28 . The curved portion  116  of the tip  104  permits the user to extend and navigate the distal end  118  of the tip  104  to the obstructed eustachian tube opening  28  through the patient&#39;s mouth and to the nasopharynx region  30  in the patient&#39;s throat  32 . The tip  104  can be either disposable or non-disposable and can be made in different sizes to adapt the device  100  to be equally usable with children patients as well as adults. The textured surface  120  on the distal end  118  of the tip  104  increases the friction when the user contacts the distal end  118  of the tip  104  against the obstruction in the opening  28  of the eustachian tube  26 . 
     The control panel  106  on the housing  102  permits the user to conveniently control the suction, lighting, a spray device for medications/anesthetics, visualization, and the motor for the vibration. The housing  102  can be provided without the control panel  106  and controlled via controls on an attached medical suction unit, such as the vacuum  128 . Of course, if only suction is required, the medical suction device can be interconnected directly to the inventive tip  104  described herein without need for the housing  102 . Further, the housing  102  and tip  104  can be employed without attachment to the medical suction device, if no suction is required and vibration is only needed for application to the obstructed opening  28  of the eustachian tube  26 . 
     The use of the device  100  according to the invention is shown in greater detail in FIGS. 10-11 which show the device  100  being inserted into a patient&#39;s mouth so that the tip  104  is positioned against the obstructed opening  28  of the eustachian tube  26  in the nasopharynx region  30  of the throat  32 . It will be understood that anesthetic can preferably by either sprayed into the nasopharynx region  30  of the throat  32  contemporaneously with the insertion of the device  100  into the patient&#39;s mouth or prior to insertion, although the use of an anesthetic is not necessary or critical to the description of this inventive device and method. 
     The inventive method consists of inserting the device  100 , with or without a pre-spray of topical anesthesia, through the patient&#39;s open mouth and into the nasopharynx region  30  of the throat  32 . With the help of the curved portion  116  in the tip  104 , the distal end  118  of the tip  104  of the device  100  can be placed against or adjacent to the opening  28  of the eustachian tube  26 . Known optic positioning cameras or scopes can be employed to further aid the user in locating and positioning the tip  104  into place adjacent to the obstructed eustachian tube  26 . 
     Once the device  100  is in position (i.e., the distal end  118  of the tip  104  is positioned adjacent or on the opening  28  of the obstructed eustachian tube  26 ), treatment consists of either suction of secretions, or vibration, or both. The user can actuate the motor  136  to apply vibratory articulation and movement to the distal end  118  of the tip  104 . Simultaneously, the user can actuate the vacuum  128  (such as by actuating the valve  132 ), to suction any fluids released by the vibratory action of the tip  104  against the opening  28  of the eustachian tube  26 . 
     This method can be performed for a predetermined amount of time and repeated as necessary. As the opening  28  of the eustachian tube  26  begins functioning properly, suction can be further applied by the tip  104  (as interconnected to the vacuum  128 ) directly into the eustachian tube  26  via the opening  28  to clear the serous fluid there, or the fluid may be allowed to drain freely. At any time during the method or afterwards, medications may be sprayed directly onto the walls of the nasophayrnx  30  or on the opening  28  of the eustachian tube  26 . This method is better than previous technology because it is more effective at opening the eustachian tube  26  and collecting and removing fluid accumulation therein. 
     While the invention has been specifically described in connection with certain specific embodiments thereof, it is to be understood that this is by way of illustration and not of limitation, and the scope of the appended claims should be construed as broadly as the prior art will permit.