WO2005102435A1 - Catheter hydrodynamique apte a l'eversion - Google Patents

Catheter hydrodynamique apte a l'eversion Download PDF

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Publication number
WO2005102435A1
WO2005102435A1 PCT/IT2004/000395 IT2004000395W WO2005102435A1 WO 2005102435 A1 WO2005102435 A1 WO 2005102435A1 IT 2004000395 W IT2004000395 W IT 2004000395W WO 2005102435 A1 WO2005102435 A1 WO 2005102435A1
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WO
WIPO (PCT)
Prior art keywords
catheter
syringe
thread
duct
walls
Prior art date
Application number
PCT/IT2004/000395
Other languages
English (en)
Inventor
Filippo Mastropasqua
Original Assignee
Filippo Mastropasqua
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filippo Mastropasqua filed Critical Filippo Mastropasqua
Publication of WO2005102435A1 publication Critical patent/WO2005102435A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/104—Balloon catheters used for angioplasty
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0017—Catheters; Hollow probes specially adapted for long-term hygiene care, e.g. urethral or indwelling catheters to prevent infections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0119—Eversible catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0662—Guide tubes
    • A61M2025/0687—Guide tubes having means for atraumatic insertion in the body or protection of the tip of the sheath during insertion, e.g. special designs of dilators, needles or sheaths

Definitions

  • This invention refers to the production of catheters utilized to pass obstructions, to * restore fluxes, to allow the probing of structures.
  • the catheter in its more common meaning, the urinary catheter, allows to pass fixed or dynamic stenosis and to restore the urine flux.
  • the catheters appear as a kind of silicone or rubber tubular having a small size diameter and they are applied by being manually pushed into the canal so that they can exert a pressure on the canal walls and push its eventual content.
  • the traditional urinary catheter is applied by "insertion", is traditionally in rubber or silicone, is shaped in a way that it can result as little traumatic as possible and it is manually pushed in conditions of relative sterility.
  • the urinary catheters are of different gauge according to the presumable dimension of the canal which in turn shows the subject's sex, age, specific pathologies. In women the urethral canal is shorter is rectilinear enough and the vesical catheterization becomes relatively simple, while in men the canal is long and with bends so that the process presents difficulty sometimes also when carried out by experts.
  • the catheter insertion manoeuvre even if simplified by special anaesthetic lubricants is a painful process and has an important own characteristic, that of dragging possible germs from the urethra external meatus to the internal sphincter present on its path so favouring the propagation of possible local infections.
  • the traditional catheterization is consequently associated to the possibility of wall injuries that result in almost inevitable micro-traumatisms but also sometimes (seldom with skilled personnel) in real method complications that are perforations (in particular of vessels and heart) or creation of fake passageways (in the urinary ducts).
  • the possibility of having a device that allows to minimize the traumatisms, to reduce the complications, to ensure the sterility is consequently well considered by all operators, but it is presumable that is also much appreciated by the patients.
  • the urethra in standard conditions is a virtual duct, with adherent walls when in idle state.
  • the patient has a catheter inserted he is in a condition of continuous discomfort due to the fact that it constantly keeps the urethra extended and the Foley's traditional rigid catheter can be the cause of painful spasms.
  • the canal continuous expansion causes discomfort, sometimes pain and it can itself be origin of infection.
  • the catheter collapse prevents the transmission of bacterial infections to the bladder and allows the urethral duct relaxation. This relaxation decreases the possibility of irruries ⁇ nd reduces the patient's discomfort.
  • Patent 5,637,091 Hakky what collapses is the whole catheter structure in its entire length and the dimension of the collapsed catheter is markedly reduced. Also when the entire catheter length collapsed (U.S. Patent 6,096,013 Hakky), the device introduced in traditional way after the walls had collapsed created a diameter much greater than that of the injectable catheter.
  • the present invention aims at supplying a catheter that allows to solve the aforementioned and other drawbacks having the characteristics described in the independent claims.
  • Other invention characteristics are object of the dependent claims. Disclosure of invention
  • the invention refers to a catheter having the following main characteristics: injectability, hydrodynamism, atraumaticity and sterility.
  • the device Relating to urethral catheterization, the device, here defined hydrodynamic, has the prerogative to advance in the urethral canal by using a fluid, the simple physiological salt solution in the first instance.
  • the fluid for its own typology ensures the absolute atraumaticity as it opens its bevel passageway by searching for the canal's opening, moving through it and expanding in sequence the different tracts up to allow, depending on the pressure exerted on the device, the restoration of an almost uniform gauge.
  • the fluid is not free but contained in a dacron, teflon, plastic, rubber, silicone or other material tube, having very thin but highly resistant walls that suits the fluid movement thus ensuring support and plasticity.
  • the invention is made up of a 7 mm diameter fabric tube, sealed at an end by a thread, entirely full of physiological salt solution (Fig. 1). It is a rigid and thin cylinder that also could be utilized as a traditional catheter by pushing it into the urethra.
  • Said cylinder has open ends and has a long thread, of biocompatible material, ccnr- ⁇ c ed by ⁇ n ir-s ⁇ rt provided with ⁇ n eyelet at the end, which will be named distal.
  • Such thread runs entirely, from inside, along the cylinder getting out on the other side and surpasses of some centimetres the other end, which will be named proximal.
  • This latter cylinder end is provided with a common sealing plastic mechanism, similar to the joints of urinary catheters (Fig. 2), suitable to the joining by rotation to the end of a common plastic 50 cc syringe with large neck.
  • the thread is inserted inside the syringe neck making it come out from the other syringe body end, without piston, whereafter the tubular that constitutes the catheter is joined to the syringe and the thus obtained device is upturned with the catheter downwards.
  • the physiological salt solution is poured into the syringe up to completely fill the catheter (Fig. 3) that now consequently appears extended for its entire length, closed at the lower end by the thread knotted around the end, directed towards the catheter inside.
  • the operation is the same only the catheter is closed at the bottom by any locking element and the physiological salt solution is introduced directly inside of the syringe.
  • the closing element can be removed as soon as by the catheter rotation and withdrawal the end will finally result virtually closed.
  • a system that opportunely closed by the piston is ready to be utilized is obtained.
  • the mechanism can now be easily sterilized, can be filled with liquid coloured or medicated by means of suitable solutes or with radiopaque liquid if it needs to be used during radiologic processes.
  • the catheter external part is kept immersed in a container filled with lubricant, anesthetic and antiseptic liquid, the tube external part, now introflexed, will be lubricated, medicated and ready for use.
  • the catheter initially is not visible and in standard conditions it takes directly shape in the urethra or in the other sites which is intended for, it is applied and shaped only because it is injectable.
  • This device specific characteristics is due to different factors: - material constituting the catheter (soft, smooth, thin) - fluid contained in the catheter, covered by the above-mentioned fabric, that is noticeably able to suit to the walls without traumatizing them - absence of catheter friction on the walls as it does not slide but it progressively fills and adheres more or less closely to the walls according to the ratio between its and the canal's gauge catheter extending that always occurs from the point starting from the centre - lubricant liquid spread on the surface that will be in contact with the walls and that moreover has the function to favour the unwinding of the deflated and wound catheter.
  • atraumaticity derives from a specific characteristic of the extension of this device illustrated in detail of fl ⁇ g ⁇ ine 7.
  • the forces exerted on the canal walls are never tangential, but always start from the device point and immediately move radially on the surrounding wall where they exert their tension.
  • the sterility is the device last characteristic, specific for this catheter with respect to the traditional ones. In fact except for that the traditional catheters are always sterilized in the factory, duly sealed and preserved, the conditions in which they are utilized, the vesical ones in particular, make this characteristic often relative. The fact of having to use them in the patient's bed and not in an operating room, because of the device length, the cleaning difficulty and disinfecting of the parts with which it is in contact especially in old, nervous, non participating patients, make the asepsis conditions completely ideal.
  • the object of the present invention solves all the aforementioned drawbacks because: - there is not the encumbrance and the handling difficulty of traditional catheters - the only part with which the device is in contact is the inserting point - during the catheter injection always sterile parts approach the urethra walls and there is never a carrying of possible centres of infection - the device atraumaticity, reducing at the minimum the epithelial injuries precludes the starting of infections - the lubricant antiseptic liquid placed on the device walls during preparation prevents possible infections.
  • a device in conformity with the present invention includes a tubular in flexible and soft material having reduced thickness walls (1), such to be contained, overturned, inside of a syringe in a physiological salt solution, with an end that is applied to the syringe neck itself, in such a way that, by acting on the syringe piston and making the liquid in it contained come out, also the tubular that unwinding moves to adhere to the duct walls where it should be applied, may come out.
  • the tubular has welded, or otherwise fixed, at the end (2), named distal, opposite to that suitable to be fixed to the syringe neck, the thread head (5) that extends inside of it up to come out on the opposite part for a predetermined length.
  • the tubular (1) is first extended (Fig. 4, 5) and then inserted inside of the syringe, by being reversed, pulling the thread (5), whereafter the piston is inserted in the syringe opposite side.
  • said tubular is filled with physiological salt solution (Fig. 3).
  • the thread tying or melting at the distal end is multi-functional for the device use.
  • the guide thread serves to graduate the catheter penetration and extending force on the canal walls and serves for the device recovery when it must be removed.
  • the device may in fact be removed by withdrawing it without particular difficulty, once deflated, by pinching its proximal, external end. This process, even if simple provides the device backwards sliding along the whole urethra and even if less traumatic than traditional catheters exposes the patient to possible micro-traumatisms caused by the walls friction.
  • the possibility instead to proceed to extraction with an again inflated device ensures a simple and atraumatic withdrawal, alike the insertion, by pulling progressively the recovery thread and eventually by rotating it to reduce the device encumbrance when withdrawn.
  • the product can be withdrawn just as it was positioned, in a atraumatic way, by bringing it back progressively inside the opening.
  • One of the invention essential advantages is that the advancement into the urethra or in the vessels occurs by progressive expansion and without dragging.
  • the advancement is in function of the force exerted on the liquid in the syringe, of the ratio between canal and catheter gauge, of the tension exerted on the guide thread, of the entity of rotation that has been imposed to the catheter at the moment of its structuring. If the force by which the fluid is injected in the catheter is great, the greater will be the propulsive force induced by the catheter inflation, it will tend to expand the point engaged in the canal, to always unwind new catheter portions, to approach walls.
  • the relative ratio between the two gauges affects the advancement; if a large gauge catheter, even larger than the canal gauge, has been chosen, the canal will be entirely extended and the same canal tension will exert a propulsive force on the catheter advancement. If the catheter has a smaller gauge than that of the canal the force exerted on the fluid by the syringe is mainly responsible for the catheter inflating and advancement. If the guide thread melted with the catheter distal end is tensioned by a sealing system integral with the syringe body or even simply manually holding the stretched head, it is ensured that the catheter will be completely inflated before utilizing still idle and wound new catheter parts.
  • the invention is made up of dacron, teflon, silicone, rubber or other plastic materials.
  • the catheter is closed in way that it is utilized as dilator of the duct which it is applied to.
  • This type of use is particularly indicated for arteries but also for the same urethra.
  • the invention can be utilized as urethral dilator.
  • the particular device functioning makes it ideal for the expansion of urethral stenosis, moreover the capacity of being uniformly expanded for its entire length makes it ideal in the multiple or long stenosis cases.
  • the particular way of progressing makes simpler, fast, atraumatic, painless the catheterization process.
  • the catheter distal end is sealed. Once the uniform expansion of the whole urethral canal is carried out the catheter can be kept inflated also for a prolonged time to resist the spring back component exerted by the stenosis. Subsequently it will be extracted atraumatically withdrawing the recovery thread when the catheter is inflated.
  • the invention can be utilized as vascular dilator.
  • vascular dilator for instance of the femoral artery, particularly long catheters (30 or 40 cm for example) having a gauge suitable to the vessel to be treated will be possibly selected.
  • an arterotomy is made and the syringe point is introduced.
  • the device is progressively injected up to uniformly expand the whole vessel thus obtaining the result of being able to act synergically on the multiple parietal injuries that are almost constant in the atherosclerosis of this vessel.
  • the syringe to which the catheter is applied has not a piston but a joint that engages an infusion pump;
  • the liquid to be injected is radiopaque in order to find on negative the impression of the injuries to be expanded as they are reached by the catheter;
  • the distal terminal is sealed;
  • the inserting syringe point with a diameter minor than that of the catheter which will be ejected from it can possibly be used.
  • the catheter is opened and the thread welded or fixed to an edge of the opening in order that it can be utilized as protection of the duct walls to which it is applied, allowing an easier and less traumatic insertion of others medical instruments and in particular of probes. It works in the previously disclosed way and is progressively inflated as the pressure is guaranteed by the sealing of the not yet unwound and still wound catheter portion.
  • the pressure cp ⁇ ns th ⁇ end ⁇ nd lets th ⁇ filling physiological salt solution com ⁇ out in th ⁇ bladder.
  • the urethra has been prepared with a preventive expansion and results now coated with a resistant fabric sheath.
  • This coating allows the introduction of different type of catheters, of cystoscopes and other surgical means that will serve for bladder, ureters, kidneys operations thus limiting the manipulation damages exerted on the urethra by these manoeuvres.
  • this protection system can be utilized also for other parts of the body (intestine canal, esophagus, vagina etc.).
  • this protection system should be provided for large size organs inserting and extending the device by injecting fluid not in the central cavity, but, by making it as a double chamber, in the external chamber may be preferable. In this way there would not be the disadvantage of a considerable amount of physiological salt solution that would perfuse the area when the device distal end is completely unwound.
  • the double wall if the external chamber after the application is voided, ensures a greater protection for the organ wall. If instead the double wall is kept extended it ensures that the hollow part is held open with easy structure crossing in addition to good sight of the operating area.
  • the device can be recovered by withdrawing the recovery thread.
  • the catheter opened in the distal part, presents a double chamber (22) along its walls suitable to originate a thickening that allows the catheter to work as a traditional urinary catheter.
  • the double chamber is integral to a duct (19) by means of which it can be filled with liquid or physiological salt solution in order to keep it extended and allow the liquid emission from the urethra.
  • the end portion of this catheter can be flared with respect to the catheter body (fig.
  • the internal opening of this catheter can be closed at the proximal end by a plug (24) and the carrier can, by acting on this closure, manage the voiding of his bladder.
  • the atraumaticity of the device ensures an easy insertion and an easy withdrawal that are decisive elements in the chronic control of the vesical incontinence.
  • the use simplicity in chronic carriers can prospect the possibility of the self-treatment.
  • the catheter, opened in the distal part, and with double chamber as the previous one instead of flaring this double chamber on the point presents the possibility of a separated chamber on the point (29) having greater diameter than that of the main chamber, that can be filled with liquid independently on the chamber along the whole duct (fig.12).
  • the chamber on the point (29) (equivalent to the traditional balloon) is integral to a duct (26) that runs along the whole device and by means of which can be filled with liquid or physiological salt solution in order to originate a retaining system in bladder.
  • the invention serves for the urinary retention.
  • th ⁇ syringe piston th ⁇ c ⁇ th ⁇ ter lets th ⁇ physiological salt solution flow down in bladder and deflates.
  • the balloon (29) that surrounds the catheter distal end thus ensuring the retention in bladder is filled with liquid.
  • the external chamber that makes the catheter inflated again, with thickened and round shaped external chamber and with internal chamber open and crossed by urine.
  • the external chamber along the whole duct contains some membranous partitions of the same material, that run along the whole opening of the double chamber and ensure that when the double chamber is filled with liquid the distance between the two walls keeps constant preventing that the inside wall collapses and closes the canal used for the urine outflow (Fig 12 G).
  • these membranous partitions are holed in more points in order to allow the connection in the whole double chamber whose walls consequently maintain the same tension in all the points. The only point in which the continuity of the double chamber interrupts is where this latter is crossed by the inflation duct for balloon on the point (Fig 12 G).
  • Fig. 1 illustrates as an example a catheter constructed according to the present invention.
  • Fig. 2 is the same catheter of Fig.
  • Fig. 3 is the same catheter of Fig. 2 in which the proximal end is applied to the ferrule of a syringe, in this way the catheter can be filled with water.
  • Fig. 4 and Fig.5 show as the catheter can be invaginated inside the extended catheter and therefore in the syringe.
  • Fig.6 shows the male urethra and the application method of the present invention by approaching the injector point to the urethra external meatus.
  • Fig. 7 is the most important figure because it illustrates the catheter
  • Fig. 8 shows the catheterization of the female urethra with a different typ ⁇ of cath ⁇ ter, a d ⁇ uble-w ⁇ li ⁇ d on ⁇ .
  • Fig. 9 illustrates as, onc ⁇ removed the injector the catheter deflates in the urethra and it can be extended by means of external chamber filling.
  • Fig. 10 shows the catheter in situ, with second chamber extended and central orifice open for the urine emission, the catheter external end results closed by a plug.
  • Fig. 11 is a catheter detail in situ, referred to the male urethra.
  • FIG. 12 illustrates in detail the steps of the double chamber catheter use and with balloon on point independent on the external chamber filling.
  • Fig. 13 illustrates the use of the device as a syringe able to penetrate passageways and irrigate cavities by means of medicated solutions.
  • Fig. 14 shows the use of the injector to position a single chamber catheter that once placed has the function of protecting the natural delicate walls from operational traumatisms during cystoscopy and instrumental manoeuvres.
  • the deepest organs in this case the uterus
  • a catheter in the simplest and most schematic form as referred to in this invention is illustrated.
  • This catheter consists of a wall 1 that particularly thin, resistant, impermeable, poorly extensible, malleable, surrounds the central canal 3 that extends from a tube end to the other.
  • a fixing element 4 for applying it to ferrule of a syringe 6 that as illustrated in Fig. 3 allows to fill the catheter with water.
  • the upwards traction of the thread 5 associated to its rotation allows as illustrated in Fig. 4 to introflex the catheter more distal part 2 and subsequently always more proximal deflated parts 7 inside of the still inflated part 3.
  • This operation can be continued up to wh ⁇ n th ⁇ whole cath ⁇ ter, completely d ⁇ fi ⁇ t ⁇ d 7 is contain ⁇ d in the syringe body 6, plunged into the water initially contained in the inflated catheter (Fig. 5).
  • the syringe that will now act as an injector can be closed by a piston and the sterile atraumatic hydrodynamic injectable catheter prototype will be realized.
  • the sole part of this device that will be in contact with the patient is the syringe ferrule covered by the joint 4, the whole rest of the device is enclosed in the syringe body in a condition of absolute sterility.
  • Fig. 6 is reported the sagittal section of the male urogenital apparatus, and is illustrated the bladder 10, the abdominal wall 13, the urethra 11.
  • the external orifice of the urethra is engaged by the point of the injector 6 on whose surface the indication of markers 9 that indicate the length of catheter emitted from the injector when is reached by the piston end 8 is possible.
  • the piston 8 begins to be pushed the catheter starts unwinding and inflating on the outside of the injector, advancing in the urethra and causing a progressive expansion of the urethra 12.
  • the board in the Fig. 6 brings again to the detail of Fig. 7 in which the catheter action mechanisms are exemplified.
  • the pressure exerted on the piston results in different forces that allow the catheter penetrated in the urethra to inflate and to maintain in the liquid a constant pressure in all the districts, pressure that is also exerted on the still deflated catheter 7 that remains consequently deflated in the opening of the already inflated catheter 3.
  • This pressure is also exerted outwards and it is the cause of forces directed in radial way 16 on the walls of the urethra that is consequently kept extended and of longitudinal advancement forces 15, along the urethra axis, that are responsible of the catheter progressing in the urethral canal.
  • These latter forces 15 are responsible for the unwinding of the catheter still deflated most proximal part and for its expansion that occurs from the already inflated catheter point.
  • This catheter surface that slowly unwinds, inflates and approaches the urethral wall can be opportunely treated during packaging with antiseptic, antibiotic, lubricating solutions that facilitate the unwinding of the advancement 15 and expansion 14 forces, but also simply the treatment with sterile physiological salt solution that creates a film in the deflated catheter spirals and a contact surface with the urethral wall with inflated catheter can result sufficient.
  • the catheter progressing mechanism remains identical also when a special double- walled type of device is used, that shown in Fig. 8 is injected in the female urethra 11.
  • a special double- walled type of device that shown in Fig. 8 is injected in the female urethra 11.
  • the catheter is this time identified by the presence of a duct 19 that has at its end a valve 18.
  • the catheter now has the open distal end and when the pressure exerted on the piston 8 of the injector 6 is such to unwind the last tract of the still deflated catheter 7 the physiological salt solution contained in the injector pours in bladder 10 and the catheter deflates because without pressure on its inside the urethra elastic forces close on its soft walls (Fig. 9).
  • Fig. 12 the entire use sequence of a permanent catheter realized with this technique is schematically illustrated.
  • the injector taken out of its pack and ready for use.
  • the particularity of two valved ducts can be seen at once.
  • Fig. 12B the catheter has been half introduced, there is an inflated portion 3 that engages the urethra and a deflated portion 7 still to be unwound.
  • Fig. 12C the catheter is completely inflated, the thread 5 is fixed to the catheter final part.
  • a closing plug 24 will reset the vesical continence or a collection pocket can be connected to the element 4. If finally the patient is afflicted with urinary retention and cannot empty autonomously the bladder it will be possible to inflate at intervals the secondary chamber 22 between the external wall 21 and internal one 20 by means of a valved duct 19 so ensuring the opening of the main canal 3 for the urine outflow.
  • Fig. 12G the sections at the different levels that show in particular as the catheter central body is characterised by the two walls 20 and 21 that enclose the external chamber 22 separated from the internal chamber 3 that is the catheter opening are represented.
  • Membranous partitions (indicating with such word partitions, small size walls) of the same material indicated with the number 33 ensure that the walls 20 and 21 are integral to one another during the inflation of chamber 22 in order that the central chamber 3 does not collapse during the inflation of chamber 22.
  • these membranous partitions present along the whole catheter length are widely fenestrated in order that the inflating solution may pass without obtacles in all sections and the external chamber results unique from the functional point of view. It is possible moreover to see in Fig. 12G the section of duct 32 that connects the valved tube 26 to the terminal balloon 29 and ensures its filling and voiding.
  • Fig 12H a variant of the balloon on point shaped in a non-spherical way so to increase the adherence to the vesical wall and minimize the possibility of vesical residue is illustrated.
  • the fixing eyelet of a possible traction thread is indicated.
  • FIG. 13 another device application intended for irrigating cavities by medicated solution is illustrated. Let's consider the possibility of use in auricular, nasal cavities, and paranasal sinuses, abscessual cavities or rectal cavity, vaginal canal or again vesical cavity, preternatural connection stomas etc., all those conditions in which not having a needle or a rigid inserter but a atraumatic and sterile instrument and in which cavities to be medicated must be reached while carrying out an expansion of the connection passageway can be necessary.
  • Fig. I3B is illustrated t ⁇ injection phas ⁇ with catheter opening 3 and deflated catheter progressing 7.
  • the catheter is completely open and there is the irrigating of the part or cavity where it is desired to intervene.
  • Fig. 13D after the medicine injection the catheter thin walls deflate 7 and the instrument can be extracted easily.
  • Fig. 14 another device application, with the single wall catheter being injected in this case in the female urethra 11 is illustrated. Once completely injected two main actions occurred: a uniform and preventive expansion of the urethra and the urethra walls protection by this passageway 34 that allows at once the introduction in bladder 10 of a cystoscope 35 or of others surgical instruments saving the delicate urethra walls from surgical manipulations and by the infective danger.
  • Fig. 15 an additional application that provides the possibility to introduce a device with the described characteristics, double-walled, with suitable gauge and mounted on an greater size injector is illustrated.
  • the catheter injection will serve to introduce inside the device 40 and subsequently the external chamber inflating by the valved joint 19 will allow to obtain a vaginal canal expansion in order to be able to have access to the uterine cavity 37 across the opening of the device 41 and moreover to protect the vagina walls from the surgical instrumentation.
  • This process that ensures sterility and protection could reveal particularly useful in the surgical post-abortion checks.
  • Analogously the same process could be utilized for the anal canal 39 for the rectal cavity scanning and treatment.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
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  • Urology & Nephrology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

La présente invention a trait à un cathéter hydrodynamique apte a l'éversion, qui préalablement à son utilisation est destiné à être disposé dans un étant d'éversion dans le corps d'une seringue (6) contenant un liquide. Grâce à une action sur le piston (8) le cathéter est poussé par la pression du liquide, sort de la seringue et lors de son déroulement s'introduit dans un conduit (11) auquel il est destiné. Le cathéter peut être muni d'une enceinte (22) le long de sa paroi (20), le remplissage de l'enceinte rendant le cathéter épais et rigide pour permettre un écoulement vers l'extérieur de liquide à travers le canal central (3) du cathéter. Un cathéter avec une extrémité fermée peut être utilisé pour la dilatation des conduits auxquels il est appliqué.
PCT/IT2004/000395 2004-04-20 2004-07-20 Catheter hydrodynamique apte a l'eversion WO2005102435A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBA2004A000015 2004-04-20
ITBA20040015 ITBA20040015A1 (it) 2004-04-20 2004-04-20 Catetere iniettabile idrodinamico sterile atraumatico.dispositivo atto a cateterizzare l'uretra o assi vascolari in maniera incruenta , in modo del tutto sterile , con spinta progressiva di avanzamento assicurata da liquido,senza sfregamento sulle pa

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010127395A1 (fr) * 2009-05-04 2010-11-11 Cellixe Pty Ltd Système de distribution d'agent
US11484688B2 (en) * 2019-01-21 2022-11-01 Univerzitet U Beogradu Minimally invasive catheter

Citations (5)

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US3589356A (en) * 1969-09-04 1971-06-29 Daniel Silverman Method for everting and extraverting flexible tubing into a body cavity
US3911927A (en) * 1974-04-17 1975-10-14 Princeton Biomedix Eversible catheter
US4604094A (en) * 1984-09-06 1986-08-05 The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services Toposcopic catheter and method of fabrication
US5637091A (en) * 1995-08-31 1997-06-10 Hakky; Said I. Collapsible catheter
US6096013A (en) * 1999-03-04 2000-08-01 Canox International Ltd. Collapsible urinary catheter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589356A (en) * 1969-09-04 1971-06-29 Daniel Silverman Method for everting and extraverting flexible tubing into a body cavity
US3911927A (en) * 1974-04-17 1975-10-14 Princeton Biomedix Eversible catheter
US4604094A (en) * 1984-09-06 1986-08-05 The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services Toposcopic catheter and method of fabrication
US5637091A (en) * 1995-08-31 1997-06-10 Hakky; Said I. Collapsible catheter
US6096013A (en) * 1999-03-04 2000-08-01 Canox International Ltd. Collapsible urinary catheter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010127395A1 (fr) * 2009-05-04 2010-11-11 Cellixe Pty Ltd Système de distribution d'agent
US11484688B2 (en) * 2019-01-21 2022-11-01 Univerzitet U Beogradu Minimally invasive catheter

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