Device for metering hardenable mass for vertebroplastia and other similar bone treatments

• US 6,676,664 B1
• Filed: 07/24/2000
• Issued: 01/13/2004
• Est. Priority Date: 08/05/1999
• Status: Expired due to Fees

• Current Assignee: Grifols SA
• Original Assignee: Grupo Grifols, S.A.
• Inventors: Al-Assir, Imad
• Primary Examiner(s): Robert, Eduardo C.
• Assistant Examiner(s): Comstock, David C
• Application Number:
  US09/628,873
• Time in Patent Office: 1,268 Days
• Field of Search: 606/59, 606/60, 606/62, 606/65, 606/72, 606/73, 606/92, 606/93, 606/94, 623/23.63, 623/23.72, 623/23.11, 222/390, 222/527, 222/388
• US Class Current: 606/94
• CPC Class Codes: A61B 17/00491 Surgical glue applicators surgical adhesives A61L24/00; two-component delivery syringes A61M5/19
• CPC Class Codes: A61B 17/8819 characterised by the introducer proximal part, e.g. cannula handle, or by parts which are inserted inside each other, e.g. stylet and cannula A61B17/8825 takes precedence
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• CPC Class Codes: A61B 17/8833 Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/4635 using minimally invasive surgery

Abstract

A main metering body has a coupling for a manual pump for filling the hardenable mass for vertebroplastia, permitting its independent filling and its subsequent introduction into the metering body, which is equipped with an end coupling for a high pressure flexible tubular member that can be coupled to the needle for introducing the hardenable mass, capable of being inserted on a long stylet for the initial puncture operation and a short stylet for the second and final puncture to the site where vertebroplastia is to be carried out.

Claims

1. A device for metering a hardenable mass for vertebroplasty comprising a main metering body with a screw-threaded shaft coupled to a propulsion plunger, wherein the main metering body has a coupling for a manual pump which is independently filled with the hardenable mass and subsequently introduces the hardenable mass into the metering body, and wherein the metering body is also equipped with an end coupling coupled to a high pressure flexible tubular member coupled to a needle for introducing the hardenable mass into a patient, the needle being inserted on a long stylet for an initial puncture and on a short stylet for a second and final puncture to a site where vertebroplasty is to be carried out.

2. The device of claim 1, wherein the stylets have the same diameter, and the length of the long stylet is preferably 30 to 50% longer than that of the short stylet.

3. A method for vertebroplasty comprising the steps of:

providing a device for metering a hardenable mass for vertebroplasty comprising a main metering body with a screw-threaded shaft coupled to a propulsion plunger, wherein the main metering body has a coupling for a manual pump which is independently filled with the hardenable mass and subsequently introduces the hardenable mass into the metering body, and wherein the metering body is also equipped with an end coupling for a high pressure flexible tubular member that can be coupled to a needle for introducing the hardenable mass into a patient the needle being insertable on a long stylet for an initial puncture and on a short sytlet for a second and final puncture to a site where vertebroplasty is to be carried out;

puncturing the body of a patient with the long stylet until the distal end thereof is near the site at which the hardenable mass is to be injected;

sliding the needle, which was previously inserted on the long stylet, so as to penetrate close to the vertebroplasty site;

substituting the long stylet with the short stylet for the final puncture to the vertebroplasty site;

extracting the short stylet with the needle remaining in the vertebroplasty site;

connecting to the end of the metering body a high pressure tubular member, the metering body having been previously filled by means of an auxiliary pump; and

injecting the hardenable mass by via the plunger of said metering body.