DE7534483U - Ureter prosthesis - Google Patents

Ureter prosthesis

Info

Publication number
DE7534483U
DE7534483U DE19757534483 DE7534483U DE7534483U DE 7534483 U DE7534483 U DE 7534483U DE 19757534483 DE19757534483 DE 19757534483 DE 7534483 U DE7534483 U DE 7534483U DE 7534483 U DE7534483 U DE 7534483U
Authority
DE
Germany
Prior art keywords
ureter
prosthesis
section
cross
urine
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.)
Expired
Application number
DE19757534483
Other languages
German (de)
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
Application filed by Individual filed Critical Individual
Priority to DE19757534483 priority Critical patent/DE7534483U/en
Publication of DE7534483U publication Critical patent/DE7534483U/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/04Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/04Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2002/047Urethrae

Description

jj Blattsheet II. BB. ee SS. CC. ** »» ** e βe β »» ee αα ii bb UU • *• * ff ηη »til HD »To HD gG hH rr titi t*t * ** » * * ϊ»* * Ϊ * >*>

Prof. Dr.-Ing. Joseph H. Spurk, 6123 Bad König, Ober-Kinzig,Prof. Dr.-Ing. Joseph H. Spurk, 6123 Bad König, Ober-Kinzig,

Außerhalb 3Outside 3

\ Dr. med. Dietger Jonas, 6 Frankfurt/M., Paul-Ehrlich-Str. 50
Dipl.-Ing. Manfred Sellmann, 6101 Nieder-.Ramstadt, Auf dem Sand 3
\ Dr. med. Dietger Jonas, 6 Frankfurt / M., Paul-Ehrlich-Str. 50
Dipl.-Ing. Manfred Sellmann, 6101 Nieder-Ramstadt, Auf dem Sand 3

HarnleiterprotheseUreter prosthesis

Die Erfindung bezieht sich auf eine Harnleiterprothese. Eine
solche kann bekanntlich anstelle eines pathologischen Harnleiterabschnittes implantiert werden, damit der Urin von der Niere wieder in die Blase abgeleitet werden kann (innere Harnableitung).
The invention relates to a ureter prosthesis. One
As is well known, this can be implanted instead of a pathological ureter section so that the urine can be drained from the kidney back into the bladder (internal urinary drainage).

Der Urintransport geschieht beim natürlichen Harnleiter peristaltisch, d.h. in einem Urinbolus, der sich mit praktisch konstanter Geschwindigkeit durch den Harnleiter bewegt. Eine Harnleiterprothese sollte so beschaffen sein, daß der Urinbolus ohne große Druckerhöhung im Harnleiter in die Hariileiterprothese eintreten kann, da man annimmt, daß diese ständig wiederkehrende Druckerhöhung für die oft beobachtete Aufweitung des Harnleiters und des Nierenbeckens
verantwortlich ist und zum Verlust der Niere führen kann.
In the natural ureter, urine is transported peristaltically, ie in a urine bolus that moves through the ureter at a practically constant speed. A ureter prosthesis should be designed in such a way that the urine bolus can enter the ureter prosthesis without a great increase in pressure in the ureter, since it is assumed that this constantly recurring increase in pressure is responsible for the widening of the ureter and the renal pelvis, which is often observed
is responsible and can lead to the loss of the kidney.

Bei den bisher verwendeten Harnleiterprothesen (meistens Silikonkautschukschläuch?) ging man davon aus, daß sich die Druckerhöhung vor der Harnleiterprothese nach dem Hagen-Poiseuille-Gesetz bestimmt (European Surgical Research 4: 138 (1972)) und legte deren Innenquerschnitt so aus, daß die hieraus berechnete Druckerhöhung nicht unzulässig groß wurde.With the ureter prostheses used so far (mostly silicone rubber tubing?) it was assumed that the pressure increase in front of the ureter prosthesis was determined by the Hagen-Poiseuille law (European Surgical Research 4: 138 (1972)) and designed its internal cross-section so that the pressure increase calculated from it did not become unacceptably large.

Das Hagen-Poiseuille-Gesetz (s.o,) liefert für laminare stationäre Strömung gute Ergebnisse; man kann aber (rechnerisch oder experimentell) zeigen, daß für praktische Durchmesser die Druckerhöhung vor der Harnleiterprothese aufgrund des instationären CharaktersThe Hagen-Poiseuille law (see above) provides for laminar stationary Flow good results; but one can show (arithmetically or experimentally) that the pressure increase for practical diameters in front of the ureter prosthesis due to its unsteady character

Blatt IISheet II

7534413 15.QA.767534413 15.QA.76

Blatt IISheet II

der Strömung der dominierende Effekt ist.the flow is the dominant effect.

Der Erfindung liegt die Aufgabe zugrunde, die instationäre Druckerhöhung vor der Harnleiterprothese möglichst gering zu halten.The invention is based on the problem of the unsteady pressure increase to be kept as low as possible in front of the ureter prosthesis.

Die Aufgabe wird erfindungsgemäß durch eine in Strömungsrichtung veränderliche Innenquerschnittsflache gelöst: Vom Harnleiterende her gesehen erweitert man die Innenquerschnittsflache der Harnleiterprothese über einen kurzen Diffusor auf die Nennquerschp.ittsfläche. According to the invention, the object is achieved by one in the direction of flow Variable inner cross-sectional area solved: Seen from the end of the ureter, the inner cross-sectional area of the ureter prosthesis is expanded through a short diffuser onto the nominal cross-sectional area.

Im folgenden ist ein Ausführungsbeispiel der Erfindung unter Bezugnahme auf die Gebrauchsmusterzeichnung näher beschrieben« Die Maße des Harnleiterendes werden zweckmäßige*tfeise so gewählt, daß der natürliche Harnleiter gerade noch über die Harnleiterprothese geschoben und mittels bekannter Invaginationstechniken befestigt werden kann. Der öffnungswinkel des sich anschließenden Diffusors wird möglichst groß gewählt; eine obere Grenze ist jedoch durch die Gefahr der Strömungsablösung gesetzt, die Inkrustationen zur Folge haben kann. Vom Diffusor bis zum Blasenende ist die Prothese mit konstantem Innenquerschnitt ausgeführt (Nennquerschnitt). Aus anatomischen Gründen ist die Harnleiterprothese am Blasenende gekrümmt.The following is an embodiment of the invention by reference described in more detail on the utility model drawing. The dimensions of the end of the ureter are expediently chosen so that the natural ureters just pushed over the ureter prosthesis and secured using known intussusception techniques can be. The opening angle of the adjoining diffuser is chosen to be as large as possible; however, an upper limit is set by the There is a risk of flow separation, which can result in incrustations. The prosthesis is included from the diffuser to the end of the bladder constant internal cross-section (nominal cross-section). For anatomical reasons, the ureter prosthesis is curved at the end of the bladder.

Um die instationäre Druckerhöhung vor Harnleiterprothesen gering zu halten, sind genügend große Innenquerschnittsflachen erforderlich. Eine dieser Forderung genügende zylindrische Prothese ist entweder garnicht oder nur über eine Voroperation zur Aufweitung des Harnleiters implantierbar. Die Erfindung erzielt den Vorteil einer einfachen Implantation und eines ii? Mittel genügend großen Innenquerschnittes, bei dem die beim ürintransport auftretenden instationären Druckerhöhungen gering sind.In order to keep the transient pressure increase in front of ureter prostheses low, sufficiently large internal cross-sectional areas are required. A cylindrical prosthesis that satisfies this requirement is either not at all or only through a previous operation for expansion of the ureter implantable. The invention achieves the advantage of simple implantation and a ii? Means big enough Internal cross-section in which the unsteady pressure increases that occur during urine transport are small.

7534483 15.04767534483 15.0476

Claims (1)

111·'111 · ' HarnleiterprotheseUreter prosthesis SchutzanspriicheProtection claims Harnleiterprothese, dadurch gekennzeichnet, daß der Innenquerschnitt von einem durch die Anatomie gegebenen Querschnitt am Harnleiterende in Durchflußrichtung zunin.mt.Ureter prosthesis, characterized in that the inner cross-section from a cross section given by the anatomy at the end of the ureter in the direction of flow. 7534413 18.IW.767534413 18.IW.76
DE19757534483 1975-10-30 1975-10-30 Ureter prosthesis Expired DE7534483U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19757534483 DE7534483U (en) 1975-10-30 1975-10-30 Ureter prosthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19757534483 DE7534483U (en) 1975-10-30 1975-10-30 Ureter prosthesis

Publications (1)

Publication Number Publication Date
DE7534483U true DE7534483U (en) 1976-04-15

Family

ID=31952943

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19757534483 Expired DE7534483U (en) 1975-10-30 1975-10-30 Ureter prosthesis

Country Status (1)

Country Link
DE (1) DE7534483U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2851010A1 (en) * 1977-11-28 1979-05-31 Abbou Clement Dr FULL OR PARTIAL URETERAL DENTURES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2851010A1 (en) * 1977-11-28 1979-05-31 Abbou Clement Dr FULL OR PARTIAL URETERAL DENTURES

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