INTERVERTEBRAL DISC SPACE SIZING TOOLS AND METHODS
A method and apparatus make a size measurement within an intervertebral space by placing an expandable and contractable device into the intervertebral space, expanding the device, measuring a size characteristic of the space, contracting the device and then removing it. Preferably, a holder is held...
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Main Authors | , , , |
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Format | Patent |
Language | English French |
Published |
03.07.2008
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Subjects | |
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Abstract | A method and apparatus make a size measurement within an intervertebral space by placing an expandable and contractable device into the intervertebral space, expanding the device, measuring a size characteristic of the space, contracting the device and then removing it. Preferably, a holder is held by a physician with an obround-shaped device being inserted into the space and then turned by a steering mechanism prior to the device expansion. The device is small enough to be passed through an incision in the disc annulus prior to turning and after contraction. The measurement may be accomplished by an external x-ray or other imaging device imaging the expanded device in situ or by mechanically operated devices. An expansion and contraction mechanism such as fluid containing bladder or mechanically shifted members expands the device which later contracts in a controlled manner to the contracted size.
L'invention concerne un procédé et appareil réalisant une mesure de taille dans un espace intervertébral en plaçant un dispositif extensible et contractile dans l'espace intervertébral, dilatant le dispositif, mesurant une caractéristique de dimension de l'espace, contractant le dispositif puis le retirant. De préférence, un dispositif de maintien est tenu par un médecin et un dispositif arrondi est inséré dans ledit espace avant de tourner grâce à un mécanisme de direction avant la dilatation du dispositif. Le dispositif est suffisamment faible pour passer à travers une incision pratiquée dans l'espace annulaire du disque avant la rotation et après la contraction. La mesure peut être réalisée par rayons X externes ou autre dispositif d'imagerie permettant l'imagerie du dispositif expansé in situ ou des dispositifs à commande mécanique. Un mécanisme d'expansion et de contraction comme une vessie contenant un fluide ou des éléments à commande mécanique déploie le dispositif qui va se contracter de manière contrôlée selon la dimension de contraction. |
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AbstractList | A method and apparatus make a size measurement within an intervertebral space by placing an expandable and contractable device into the intervertebral space, expanding the device, measuring a size characteristic of the space, contracting the device and then removing it. Preferably, a holder is held by a physician with an obround-shaped device being inserted into the space and then turned by a steering mechanism prior to the device expansion. The device is small enough to be passed through an incision in the disc annulus prior to turning and after contraction. The measurement may be accomplished by an external x-ray or other imaging device imaging the expanded device in situ or by mechanically operated devices. An expansion and contraction mechanism such as fluid containing bladder or mechanically shifted members expands the device which later contracts in a controlled manner to the contracted size.
L'invention concerne un procédé et appareil réalisant une mesure de taille dans un espace intervertébral en plaçant un dispositif extensible et contractile dans l'espace intervertébral, dilatant le dispositif, mesurant une caractéristique de dimension de l'espace, contractant le dispositif puis le retirant. De préférence, un dispositif de maintien est tenu par un médecin et un dispositif arrondi est inséré dans ledit espace avant de tourner grâce à un mécanisme de direction avant la dilatation du dispositif. Le dispositif est suffisamment faible pour passer à travers une incision pratiquée dans l'espace annulaire du disque avant la rotation et après la contraction. La mesure peut être réalisée par rayons X externes ou autre dispositif d'imagerie permettant l'imagerie du dispositif expansé in situ ou des dispositifs à commande mécanique. Un mécanisme d'expansion et de contraction comme une vessie contenant un fluide ou des éléments à commande mécanique déploie le dispositif qui va se contracter de manière contrôlée selon la dimension de contraction. |
Author | TRUDEAU, JEFFREY L PERNSTEINER, WESTON BAO, QI-BIN KILPELA, THOMAS S |
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DocumentTitleAlternate | outils et procédés de dimensionnement d'espace de disque intervertébral |
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SubjectTerms | BANDAGES, DRESSINGS OR ABSORBENT PADS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DIAGNOSIS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PROSTHESES SURGERY TREATMENT OR PROTECTION OF EYES OR EARS |
Title | INTERVERTEBRAL DISC SPACE SIZING TOOLS AND METHODS |
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