DE4141572A1 - Urethral prosthesis made from plastics - has longitudinal slit which enables it to be reduced in diameter for ease of insertion - Google Patents

Urethral prosthesis made from plastics - has longitudinal slit which enables it to be reduced in diameter for ease of insertion

Info

Publication number
DE4141572A1
DE4141572A1 DE19914141572 DE4141572A DE4141572A1 DE 4141572 A1 DE4141572 A1 DE 4141572A1 DE 19914141572 DE19914141572 DE 19914141572 DE 4141572 A DE4141572 A DE 4141572A DE 4141572 A1 DE4141572 A1 DE 4141572A1
Authority
DE
Germany
Prior art keywords
urethral prosthesis
projections
tube
diameter
urethral
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE19914141572
Other languages
German (de)
Inventor
Hans Prof Dr Sachse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19914130431 external-priority patent/DE4130431A1/en
Application filed by Individual filed Critical Individual
Priority to DE19914141572 priority Critical patent/DE4141572A1/en
Publication of DE4141572A1 publication Critical patent/DE4141572A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/94—Stents retaining their form, i.e. not being deformable, after placement in the predetermined place
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/92—Stents in the form of a rolled-up sheet expanding after insertion into the vessel, e.g. with a spiral shape in cross-section
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
    • A61F2210/0019—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation

Abstract

The urethral prosthesis consists of a tube (1) made of plastic which may be reinforced with metal rings (2). The tube has a longitudinal slit with projections (10) alternating with recesses (11) along each edge of the slit. The projections and recesses are so dimensioned and arranged that the projections on one side of the slot fit into the recesses of the other side when the diameter of the tube is reduced by pressing the edges of the slot together. The tube is held in this position by inserting a long pin into longitudinal holes (5) in the projections (10). USE/ADVANTAGE - The facility of reducing the diameter enables the prosthesis to be more easily inserted in the urethra.

Description

Die in der Patentanmeldung P 41 30 431.4 angegebene Harnröhrenprothe­ se läßt sich für den Einführvorgang in die Harnröhre nur schwer im Umfang verringern. Es kommt dabei zur Faltenbildung von der oben liegenden Wand 3. Außerdem kann bei zu kleinem Umfang die Spreizwirkung innerhalb der Harnröhre ungenügend sein, weil die Wand 3 dem Federdruck von 2 entge­ genwirkt.The urethral prosthesis specified in patent application P 41 30 431.4 is difficult to reduce in scope for the insertion process into the urethra. This causes wrinkling from the wall 3 above. In addition, the spreading effect within the urethra can be insufficient if the size is too small because the wall 3 counteracts the spring pressure of 2 .

Deshalb wird in dem Zusatzpatent nach Anspruch 1 auf die Wand 3 verzich­ tet und das Rohr der Harnröhrenprothese oben geöffnet.Therefore, is waived in the additional patent according to claim 1 on the wall 3 and opened the tube of the urethral prosthesis above.

Nach Anspruch 2 verfügen die beiden längsverlaufenden Kanten über Aus­ kragungen 10 und Einkerbungen 11 welche reißverschlußartig ineinander passen und einen längsverlaufenden Kanal 5 besitzen. Wenn man die Aus­ kragungen 10 gegen den Federdruck der Metallringe 2 in die Einkerbungen 11 hineinplaziert, kann man nach Anspruch 4 einen Mandrin 6 in den Kanal 5 hineinstecken und damit ein geschlossenen Rohr bilden, dessen Umfang für den Einführvorgang wesentlich kleiner ist als der Umfang des offenen Rohres. Nach dem Einführen der Harnröhrenprothese in das operativ erwei­ terte Operationsgebiet wird der Mandrin 6 wieder entfernt, wobei sich das Rohr 7 gegen die Wand der Harnröhrenprothese stemmt.According to claim 2, the two longitudinal edges have from projections 10 and notches 11 which fit into each other like a zipper and have a longitudinal channel 5 . If one from the projections 10 against the spring pressure of the metal rings 2 into the notches 11 , you can insert a stylet 6 into the channel 5 according to claim 4 and thus form a closed tube, the scope of which is much smaller than the scope of the insertion process open pipe. After insertion of the urethral prosthesis into the operatively expanded operating area, the stylet 6 is removed again, the tube 7 pushing against the wall of the urethral prosthesis.

Nach Anspruch 3 liegen die Metallanteile im Basisbereich 2a sehr ober­ flächlich zum Innenlumen zu, so daß hier zur Beseitigung der Spreizwirkung die Metallringe oder -drähte nach Durchtrennung der dünnen Kunststoff­ schicht relativ leicht durchtrennt werden können, wozu ein Zängchen oder Schleifer dienen kann.According to claim 3, the metal portions in the base region 2 a are very upper surface to the inner lumen, so that here to eliminate the spreading effect, the metal rings or wires can be severed relatively easily after severing the thin plastic layer, for which purpose a pincer or grinder can be used.

Anspruch 4 ermöglicht eine Verkleinerung des Außendurchmessers der Harnröhrenprothese für den Einführvorgang unter Beibehaltung der Vorteile des geschlossenen Rohres.Claim 4 enables a reduction in the outer diameter of the Urethral prosthesis for the insertion process while maintaining the advantages of the closed pipe.

Die verschiedenen Ausführungsformen werden anhand der Zeichnungen Fig. 1-3 erläutert.The various embodiments are explained with reference to the drawings Fig. 1-3.

Dabei zeigt die Fig. 1 einen Querschnitt durch die Harnröhrenprothese, die Fig. 2 ebenfalls einen Querschnitt und die Fig. 3 eine seitliche Ansicht. The Fig 1 2 3 also shows. A cross section through the urethral prosthesis, Fig. A cross section and Fig. Is a side view.

Bei Fig. 1 finden sich im Bereich des abgeflachten Umfangteils Auskragun­ gen 10, die in die Einkerbungen 11 der Gegenseite hineinragen können. Um dies zu bewerkstelligen, muß ein gewisser Druck auf das Rohr aus­ geübt werden. Dabei kommt es zu einer Umfangverkleinerung. Diese Positi­ on kann durch Einführen des Mandrins 6 in die Löcher 5 fixiert werden. Durch das Bedürfnis des Rohres in die ursprüngliche Lage zurückzukehren, wird der Mandrin 6 geklemmt gehalten. Mit diesem verkleinerten Umfang wird die Prothese in die operativ erweiterte Harnröhre eingeführt. In richti­ ger Position in der Harnröhre wird nun der Mandrin 6 entfernt, d. h. aus dem Kanal 5 herausgezogen. Dabei stemmt sich das Rohr 7 gegen die Prothe­ senwand.In Fig. 1 are in the area of the flattened peripheral portion Auskragun conditions 10 , which can protrude into the notches 11 on the opposite side. To do this, some pressure must be exerted on the tube. This leads to a reduction in circumference. This position can be fixed by inserting the stylet 6 into the holes 5 . Due to the need of the tube to return to the original position, the stylet 6 is kept clamped. With this reduced size, the prosthesis is inserted into the surgically enlarged urethra. In the correct position in the urethra, the stylet 6 is now removed, ie pulled out of the channel 5 . The pipe 7 braces against the prothe senwand.

Die Fig. 2 zeigt eine Ausbildungsform, bei welcher der Metallbügel im Basis­ bereich 2a sehr oberflächlich liegt, so daß er in diesem Bereich sehr leicht entweder durchschnitten, oder durchschliffen werden kann. Fig. 2 shows a form of training, in which the metal bracket in the base area 2 a is very superficial, so that it can be easily cut or looped through in this area.

Die Fig. 3 gibt eine Seitenansicht wieder und läßt die zum Entfernen ange­ brachte Nase 8 mit einem Loch 9 erkennen. Sowohl mit Zängchen wie auch einem Haken kann zum Entfernen die Prothese in einen Endoskopschaft hereingezogen und damit ihr Umfang verkleinert werden. Fig. 3 shows a side view and shows the removed nose 8 brought with a hole 9 can be seen. With both pliers and a hook, the prosthesis can be pulled into an endoscope shaft to remove it, thereby reducing its size.

Claims (5)

1. Harnröhrenprothese in Form eines runden Kunststoffrohres gegebenenfalls verstärkt mit elastischen Metallringen bzw. -drähten, - in die Wand einge­ schmolzen oder beweglich eingebracht -, entsprechend P 41 30 431.4, dadurch gekennzeichnet, daß zumindest ein Teil des Rohres längs ähnlich wie ein U mehr oder weni­ ger offen ist.1. Urethral prosthesis in the form of a round plastic tube, optionally reinforced with elastic metal rings or wires, - melted into the wall or inserted movably -, according to P 41 30 431.4, characterized in that at least part of the tube lengthways similar to a U more or less open. 2. Harnröhrenprothese nach Anspruch 1, dadurch gekennzeichnet, daß die längsverlaufenden freien Kanten über Auskragungen 10 und Einkerbungen 11 verfügen, welche sich so gegenüberstehen, daß die Auskragungen in die Einkerbungen der Gegenseite hineinpassen und daß durch die Auskragun­ gen ein Kanal 5 verläuft, in welchen ein stabförmiger Mandrin 6 hineinpaßt.2. Urethral prosthesis according to claim 1, characterized in that the longitudinal free edges have projections 10 and notches 11 which face each other so that the projections fit into the notches on the opposite side and that a channel 5 runs through the projections, in which a rod-shaped stylet 6 fits into it. 3. Harnröhrenprothese nach Anspruch 1 oder Anspruch 2 dadurch gekenn­ zeichnet, daß die den Basisteil 2a der Metallringe bedeckende Kunststoff­ schicht vorzugsweise sehr dünn ist und daß die Kunststoffschicht zwischen Basisteil 2a und Außenwand in diesem Bereich vorzugsweise relativ dick ist.3. urethral prosthesis according to claim 1 or claim 2, characterized in that the base part 2 a of the metal rings covering plastic layer is preferably very thin and that the plastic layer between base part 2 a and the outer wall is preferably relatively thick in this area. 4. Harnröhrenprothese nach Anspruch 2 oder 3 dadurch gekennzeichnet, daß sich über den Mandrin 6 ein bewegliches Rohr 7 befinden kann.4. urethral prosthesis according to claim 2 or 3, characterized in that there can be a movable tube 7 over the stylet 6 . 5. Harnröhrenprothese nach Anspruch 2 bis 4, dadurch gekennzeichnet, daß die beiden freien Kanten der Harnröhrenprothese von einer vorzugsweise dünnen Membran verbunden sind.5. urethral prosthesis according to claim 2 to 4, characterized in that the two free edges of the urethral prosthesis are preferred by one thin membrane are connected.
DE19914141572 1991-09-13 1991-12-17 Urethral prosthesis made from plastics - has longitudinal slit which enables it to be reduced in diameter for ease of insertion Withdrawn DE4141572A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914141572 DE4141572A1 (en) 1991-09-13 1991-12-17 Urethral prosthesis made from plastics - has longitudinal slit which enables it to be reduced in diameter for ease of insertion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914130431 DE4130431A1 (en) 1991-09-13 1991-09-13 Plastics urethral prosthesis - consists of tube and reinforced with metal rings placed in tube mould or fitted within plastics layers of tube
DE19914141572 DE4141572A1 (en) 1991-09-13 1991-12-17 Urethral prosthesis made from plastics - has longitudinal slit which enables it to be reduced in diameter for ease of insertion

Publications (1)

Publication Number Publication Date
DE4141572A1 true DE4141572A1 (en) 1993-06-24

Family

ID=25907276

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19914141572 Withdrawn DE4141572A1 (en) 1991-09-13 1991-12-17 Urethral prosthesis made from plastics - has longitudinal slit which enables it to be reduced in diameter for ease of insertion

Country Status (1)

Country Link
DE (1) DE4141572A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996011648A1 (en) * 1994-10-18 1996-04-25 Stentco, Inc. Method and apparatus for forming an endoluminal bifurcated graft
FR2740025A1 (en) * 1995-10-23 1997-04-25 Berberian Jean Pierre Flexible prosthesis for replacement of urethra
WO1998002112A1 (en) * 1996-07-12 1998-01-22 Alain Fouere Extensible filtering sheath for surgical use for vena cava or large blood vessels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996011648A1 (en) * 1994-10-18 1996-04-25 Stentco, Inc. Method and apparatus for forming an endoluminal bifurcated graft
EP1290989A3 (en) * 1994-10-18 2003-11-19 TERAMed Corporation Apparatus for forming an endoluminal bifurcated graft
FR2740025A1 (en) * 1995-10-23 1997-04-25 Berberian Jean Pierre Flexible prosthesis for replacement of urethra
FR2740024A1 (en) * 1995-10-23 1997-04-25 Berberian Jean Pierre Flexible prosthesis for replacement of urethra
EP0770365A2 (en) 1995-10-23 1997-05-02 BERBERIAN, Jean-Pierre, Martial Urethral prosthesis and instrument for its placement
EP0770365A3 (en) * 1995-10-23 1997-05-07 BERBERIAN, Jean-Pierre, Martial Urethral prosthesis and instrument for its placement
WO1998002112A1 (en) * 1996-07-12 1998-01-22 Alain Fouere Extensible filtering sheath for surgical use for vena cava or large blood vessels

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