DE102008030690A1 - Expander for producing bony cavity for treating e.g. osteoporotic fracture, has flexibly deformable expansion element comprising leaf spring formed from outer and inner leaves, where outer leaf is positively supported on inner leaf - Google Patents
Expander for producing bony cavity for treating e.g. osteoporotic fracture, has flexibly deformable expansion element comprising leaf spring formed from outer and inner leaves, where outer leaf is positively supported on inner leaf Download PDFInfo
- Publication number
- DE102008030690A1 DE102008030690A1 DE102008030690A DE102008030690A DE102008030690A1 DE 102008030690 A1 DE102008030690 A1 DE 102008030690A1 DE 102008030690 A DE102008030690 A DE 102008030690A DE 102008030690 A DE102008030690 A DE 102008030690A DE 102008030690 A1 DE102008030690 A1 DE 102008030690A1
- Authority
- DE
- Germany
- Prior art keywords
- leaf
- expansion element
- expander
- leaves
- expander according
- 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- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/885—Tools for expanding or compacting bones or discs or cavities therein
- A61B17/8852—Tools for expanding or compacting bones or discs or cavities therein capable of being assembled or enlarged, or changing shape, inside the bone or disc
- A61B17/8858—Tools for expanding or compacting bones or discs or cavities therein capable of being assembled or enlarged, or changing shape, inside the bone or disc laterally or radially expansible
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
Abstract
Description
Die Erfindung betrifft einen speziellen Expander für die Kyphoplastie und die Vertebroplastie in der Humanmedizin. Die Anwendung eines derartigen Expanders ist dann indiziert, wenn eine osteoporotische Fraktur oder eine osteolytische Liäson vorliegt. Im Falle kollabierter Wirbelkörper können diese mit dem Expander aufgerichtet, ein adäquater Hohlraum im spongiösen Bereich geschaffen und dieser mit Knochenzement verfüllt werden.The The invention relates to a special expander for kyphoplasty and vertebroplasty in human medicine. The application of a Such expander is then indicated when an osteoporotic fracture or an osteolytic lesion is present. In case of collapse Vertebral bodies can erect these with the expander, created an adequate cavity in the cancellous area and this be filled with bone cement.
Aus
der
Nimmt man nun an, daß vom Expander für die Aufrichtung von Wirbelkörpern Spreizkräfte bis in den Bereich von etwa 50 N aufgebracht werden müssen, so erfordert dies rigide Blattfedern entsprechender Dicke. Allerdings treten dann bei der typischen Belastungsverformung starke Unterschiede zwischen Zug- und Druckkräften auf, welche im beidseitigen Endbereich des Körbchens an der jeweiligen Kante einer umgreifenden Hülse zur Initiierung von Rissen führen kann. Nach mehreren sich wiederholenden Aufspreizungen kann es dann zu einem Rißwachstum kommen und schließlich zum Bruch einer oder mehrerer der Blätter des Körbchens. In der Praxis hat sich jetzt leider gezeigt, daß es in etwa 8% der Anwendungsfälle zu solchen Brüchen kommt.takes Let's say that from the expander for the erection of vertebral bodies spreading forces into the area of about 50 N must be applied, so this requires rigid leaf springs of appropriate thickness. However, then occur in the typical load deformation strong differences between Tensile and compressive forces, which in the two-sided end of the cup at the respective edge of a encompassing Sleeve may cause initiation of cracks. After several repetitive spreads, it may become too a crack growth and finally to break one or more of the leaves of the basket. Unfortunately, in practice it has now become apparent that in about 8% of the use cases for such fractures comes.
Beim Bruch eines einzelnen oder gar mehrerer Blätter kann die endgültige Herstellung der vom Operateur ins Auge gefaßten Kavität in Frage gestellt sein. Außerdem kann dann die Extraktion des Expanders erschwert oder gänzlich unmöglich sein. Im ungünstigen Fall muß ein total abgebrochenes Blatt im Wirbelkörper verbleiben. Es versteht sich von selbst, daß derartige Komplikationen absolut unerwünscht sind. Es bestand daher die Aufgabe zur Schaffung eines entsprechenden Expanders ohne die oben genannten Probleme.At the Breakage of a single or even several leaves may be the final production of the surgeon's eye Cavity be questioned. In addition, can then the extraction of the expander more difficult or completely be impossible. In the worst case one must totally broken leaf remain in the vertebral body. It It goes without saying that such complications are absolutely undesirable. It was therefore the task to create a corresponding expander without the above Problems.
Die genannte Aufgabe wird durch die Zurverfügungstellung eines Expanders mit einem speziellen Expansionselement aus zweilagigen Blattfedern in Gestalt von zwei ineinander gesteckten Körbchen gelöst. Dabei liegen die am äußeren Körbchen gebildeten Blätter formschlüssig, jedoch gemeinsam gegen die am inneren Körbchen gebildeten Blätter verschiebbar, auf letzteren auf. Sowohl das äußere, als auch das innere Körbchen sind aus Rohrmaterial unterschiedlichen Durchmessers gefertigt. Dabei werden die einzelnen Blätter durch Schlitzung von Rohrmaterial erzeugt. Die Schlitzung wird in ihrer Länge und Platzierung so gewählt, daß an beiden Enden des Körbchens ein ungeschlitzter Ring verbleibt, welcher das ungewollte Zerfallen des Körbchens in einzelne Teile unterbindet. Vorzugsweise sind die Körbchen aus einer hochelastischen Legierung, z. B. einem Memorymetall, hergestellt.The This task is achieved by the provision of a Expander with a special expansion element of two-ply Leaf springs solved in the form of two nested cups. They are on the outer basket formed leaves form-fitting, but together against the leaves formed on the inner cup movable, on the latter. Both the outer, as well as the inner cup are different from tube material Diameter made. In the process, the individual leaves become produced by slotting of pipe material. The slit is in their length and placement chosen so that both ends of the basket remain an unslotted ring, which the unwanted disintegration of the basket into individual Parts are blocked. Preferably, the cups are made of one highly elastic alloy, z. B. a memory metal.
Die
Erfindung soll im Folgenden anhand der einzigen Zeichnungsfigur
mithilfe eines Beispiels näher erläutert werden.
Mit der Erfindung wird ein Expander mit einem speziellen Expansionselement zur Verfügung gestellt, bei welchem aufgrund der Verwendung von Blattfedern aus aufeinander liegenden Blättern die auftretenden Zugspannungen deutlich reduziert sind. In Verbindung mit tulpenartigen oder wahlweisen polygonalen Aufweitungen in den die Enden der Körbchen übergreifenden Hülsen ist auch beim Wiederholungsgebrauch des erfindungsgemäßen Expanders die Bruchgefahr der Blattfedern sicher beseitigt. Die Erfindung kann dadurch in einem medizinischen Teilbereich einen Beitrag zur Verbesserung der Handhabungssicherheit leisten.With the invention, an expander with egg nem special expansion provided, in which due to the use of leaf springs made of overlapping leaves occurring tensile stresses are significantly reduced. In connection with tulip-like or optional polygonal expansions in the sleeves of the ends of the cross-over the risk of breakage of the leaf springs is certainly eliminated even in the repetitive use of the expander according to the invention. The invention can thereby make a contribution to improving handling safety in a medical subarea.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - EP 1787593 A1 [0002] - EP 1787593 A1 [0002]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008030690A DE102008030690A1 (en) | 2008-07-01 | 2008-07-01 | Expander for producing bony cavity for treating e.g. osteoporotic fracture, has flexibly deformable expansion element comprising leaf spring formed from outer and inner leaves, where outer leaf is positively supported on inner leaf |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008030690A DE102008030690A1 (en) | 2008-07-01 | 2008-07-01 | Expander for producing bony cavity for treating e.g. osteoporotic fracture, has flexibly deformable expansion element comprising leaf spring formed from outer and inner leaves, where outer leaf is positively supported on inner leaf |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008030690A1 true DE102008030690A1 (en) | 2010-01-07 |
Family
ID=41396591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008030690A Withdrawn DE102008030690A1 (en) | 2008-07-01 | 2008-07-01 | Expander for producing bony cavity for treating e.g. osteoporotic fracture, has flexibly deformable expansion element comprising leaf spring formed from outer and inner leaves, where outer leaf is positively supported on inner leaf |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008030690A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8795369B1 (en) | 2010-07-16 | 2014-08-05 | Nuvasive, Inc. | Fracture reduction device and methods |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3116825A1 (en) * | 1980-05-23 | 1982-03-04 | Arturo Salice S.p.A., 22060 Novedrate, Como | Hinge joint for doors, flaps or the like |
US20040092946A1 (en) * | 2001-02-20 | 2004-05-13 | Bagga Charanpreet S. | System and kit for delivery of restorative materials |
EP1787593A1 (en) | 2004-05-19 | 2007-05-23 | Sintea Biotech S.p.A. | Device for creating bone cavities |
-
2008
- 2008-07-01 DE DE102008030690A patent/DE102008030690A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3116825A1 (en) * | 1980-05-23 | 1982-03-04 | Arturo Salice S.p.A., 22060 Novedrate, Como | Hinge joint for doors, flaps or the like |
US20040092946A1 (en) * | 2001-02-20 | 2004-05-13 | Bagga Charanpreet S. | System and kit for delivery of restorative materials |
EP1787593A1 (en) | 2004-05-19 | 2007-05-23 | Sintea Biotech S.p.A. | Device for creating bone cavities |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8795369B1 (en) | 2010-07-16 | 2014-08-05 | Nuvasive, Inc. | Fracture reduction device and methods |
US9144501B1 (en) | 2010-07-16 | 2015-09-29 | Nuvasive, Inc. | Fracture reduction device and methods |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3415122B1 (en) | Method for producing a stent | |
DE102010008360A1 (en) | Medical implant in which gaps remain during crimping or folding, method and device for moving | |
EP2056723A1 (en) | Occlusion element for openings in the heart, in particular an asd occlusion element | |
DE202009012698U1 (en) | control device | |
DE102006003374A1 (en) | Connecting rod with outer flexible element | |
DE102010008382A1 (en) | A method of crimping or folding a medical implant on a device for introducing or introducing same using zero-pressure crimping and devices | |
DE102018107594B4 (en) | Medical device for intravascular treatment and manufacturing method | |
DE112016000574T5 (en) | STENT FOR THE AIRWAY | |
EP2523734B1 (en) | Trampoline | |
DE102012105082A1 (en) | Transmission device for transmitting a force and a torque in a medical instrument | |
DE69917739T2 (en) | EXPANDABLE STENT | |
DE102020109158A1 (en) | Medical intravascular treatment device and manufacturing process | |
DE102008030690A1 (en) | Expander for producing bony cavity for treating e.g. osteoporotic fracture, has flexibly deformable expansion element comprising leaf spring formed from outer and inner leaves, where outer leaf is positively supported on inner leaf | |
EP1529494A1 (en) | Instrument for treatment of regions of human or animal bones | |
WO2012010184A1 (en) | Intramedullary nail | |
EP3827762B1 (en) | Medical device for intravascular treatment and method of manufacturing the same | |
DE102014114888A1 (en) | Stent for percutaneous vertebroplasty | |
EP3381376B1 (en) | Surgical retractor system with a retractor and an extractor | |
DE102008022332B4 (en) | Medical instrument for dilating the paranasal sinuses | |
WO2008116600A1 (en) | Manipulator for round material, particularly for a kirschner wire | |
DE102015204486A1 (en) | Surgical instrument | |
EP3300675A1 (en) | Component for a medical instrument and medical instrument | |
EP2732754B1 (en) | Flexible endoscope shaft and endoscope of this sort | |
DE102013104565B3 (en) | Pusher assembly for a delivery system for a self-expanding vascular graft and a delivery system | |
WO2012007163A1 (en) | Retrievable wire stent |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R073 | Re-establishment requested | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20150203 |
|
R012 | Request for examination validly filed | ||
R074 | Re-establishment allowed | ||
R012 | Request for examination validly filed |
Effective date: 20150515 |
|
R074 | Re-establishment allowed |
Effective date: 20150605 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |