WO2013117795A1 - Dispositif de dosage pour l'injection de ciments osseux - Google Patents

Dispositif de dosage pour l'injection de ciments osseux Download PDF

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Publication number
WO2013117795A1
WO2013117795A1 PCT/ES2013/070076 ES2013070076W WO2013117795A1 WO 2013117795 A1 WO2013117795 A1 WO 2013117795A1 ES 2013070076 W ES2013070076 W ES 2013070076W WO 2013117795 A1 WO2013117795 A1 WO 2013117795A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
cement
plunger
injection
coils
Prior art date
Application number
PCT/ES2013/070076
Other languages
English (en)
Spanish (es)
Inventor
Sergio GÓMEZ GONZÁLEZ
Enrique FERNÁNDEZ AGUADO
Maria Daniela VLAD
Miguel Ángel GÓMEZ GONZÁLEZ
Leonel Christopher ECHENIQUE SULCA
Original Assignee
Universitat Politècnica De Catalunya
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 Universitat Politècnica De Catalunya filed Critical Universitat Politècnica De Catalunya
Publication of WO2013117795A1 publication Critical patent/WO2013117795A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • 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
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B17/8822—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it 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
    • 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
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B17/8825—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it characterised by syringe details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
    • B01F25/4415—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the slits being formed between the helical windings of a spring-like construction or by deforming a spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
    • B01F33/50112—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held of the syringe or cartridge type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/56—General build-up of the mixers
    • B01F35/562—General build-up of the mixers the mixer or mixing elements being collapsible, i.e. when discharging the products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/75425—Discharge mechanisms characterised by the means for discharging the components from the mixer using pistons or plungers
    • B01F35/754251—Discharge mechanisms characterised by the means for discharging the components from the mixer using pistons or plungers reciprocating in the mixing receptacle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M2005/3114—Filling or refilling
    • A61M2005/3115—Filling or refilling spring-assisted

Definitions

  • the present invention concerns a dosing device for injection of bone cements, plunger type, comprising a main body containing a compressible conical spring of fine section and length equal to the body, which through a pusher, forces the spring to compress complete form until adopting a flat spiral shape without the turns coming to touch.
  • This device allows the constant agitation of the cement contained inside the body due to the shear produced by the windings of the spring in its displacement in compression during the injection.
  • This device guarantees the homogeneity of the cement, improving its injectability and avoiding the problems of pressure filtration and syringe blockage that are observed during the filling of bone cavities for this type of materials in standard injection processes.
  • Current devices for the injection of bone cements are based on the injection of cement from a plunger mechanism that forces the rectilinear movement of the pusher that forces the cement to move longitudinally and be introduced, after a conical reduction of the plunger, into the cannula or needle that directs it to the cavity of the bone to be filled.
  • the progressive separation or elimination of the liquid phase into the cannula during the injection together with the compaction of the powder phase inside the plunger causes a drastic decrease in the injectability of the material and a significant increase in the manual pressure required to continue the injection of the same by the surgeon, a situation that disables the clinical procedure, since in addition the partial volume of injected cement does not ensure the mechanical or biomechanical stability properties of the implant due to having, injected cement, a liquid / powder ratio greater than that of the densified cement inside the plunger that has not yet been injected.
  • the liquid can flow faster than the solid phase causing local changes in the composition of the cement or pasta.
  • the paste that is closer to the region of higher pressure that is, near the head of the syringe pusher, may have been so emptied of liquid phase that the biphasic mixture in this area is no longer It behaves like a paste but like a wet powder.
  • the paste in the low pressure zone that is, near the inlet of the cannula, is enriched in the liquid phase.
  • the final objective of this patent is to focus the injection system as a real design factor, understanding both the surgical technique and the in vivo setting and hardening properties of the biocement as optimal.
  • the present patent ensures through the new design of injection system that the biocement remains homogeneous, without phase separation, during the entire ex vivo injection process, that is, during the emptying of the cement from inside the syringe into the cannula and by continuity into the bone cavity to be treated.
  • the present invention implements a dosing device for injection of bone cements that facilitates their mixing and homogenization by the shear effect produced by the conical spring turns during their compression as a result of the movement of the pusher or piston in vertical movement in the inside the hollow syringe body.
  • the approach of the turns during the compression of the conical spring allows the Homogeneous shearing and mixing of cement without phase separation or unwanted effects of pressure filtering.
  • the effect achieved is an improvement in the injectability of the cement or the ability to inject it without modifying its properties. This also reduces the manual pressure required by the surgeon during the entire injection procedure, facilitating the surgical technique.
  • the dosing device for injection of bone cements comprises a plunger or syringe body containing, within it, a conical spring of any section, in an extended position, and at least the same length as the inner piston body.
  • the push made on it by the piston in its longitudinal translation movement allows the spring to be compressed to maximum compression, when all the turns take the form of a spiral, in the same plane, without the turns coming into contact with each other.
  • This system of mixing or shear agitation offered by the conical propeller of any section guarantees the homogeneity of the cement-based cement-like materials, such as bone cements of calcium phosphates and / or calcium sulfates, or others, and prevents known problems of pressure filtration of this type of biphasic mixtures during dosing and filling of bone cavities.
  • the dosing and injection device described herein can be used for a plurality of injections or could be designed for single use, for example, taking into account the spring recovery constant or using known anchoring systems between the pusher, or plunger , and the main body in maximum compression position.
  • Figure 1 shows an exploded view of the dosing device for injection of bone cements of the invention, in this case, the piston (1) and the conical spring of any profile (2) and the syringe body (3) in the initial state, without compression of the conical spring.
  • Figure 2.- shows an exploded view of the dosing device for injection of bone cements of the invention, in this case, the piston (1) and the conical spring of any profile (2) and the syringe body (3) in final state, after compression of the conical spring.
  • Figure 3.- shows a view of the compression conical spring in its initial position.
  • Figure 4.- shows a view of the conical compression spring in its final position of maximum compression.
  • the proposed invention concerns a dosing device for injection of bone cements, which has advantages over those existing in the state of the art.
  • the device described here is capable of maintaining continuous agitation of the bone cement during the dosing and injection process, guaranteeing the homogeneity of the cement and its liquid-powder ratio, avoiding the problems of pressure filtration during its dosing, thus as reducing your pressure during the entire clinical injection procedure.
  • the described dosing and injection device comprises elements known in the state of the art, such as the piston (1), the conical spring of any profile (2) and the hollow syringe body (3).
  • the conical spring is in intimate contact with the plunger and with the distal part of the inside of the syringe, where the conical propeller rests, preferably in the part with smaller diameter.
  • the device will be provided with means to couple an external mixing system.
  • the conical propeller or spring (2) In order for the conical propeller or spring (2) to mix the cement by shear, it must be placed inside the syringe body (3) and also must be concentrically subjected to the compression exerted by the plunger (1).
  • one of the important features of the device of the invention lies in the spring (2) included inside the syringe body (3), along its entire length, where the conical turns of the propeller are collected from Telescopic shape due to the effect of compression.
  • the relative translational movement of the plunger on the syringe is achieved by the pressure exerted by the surgeon from the thrust of the plunger (1) preventing the mechanical recovery constant of the spring from producing stresses. excessive progressive.
  • the spring (2) when compressed by the action of the piston (1) as it descends through the interior of the body (3) causes the telescopic withdrawal of the conical helix turns, allowing to adopt:
  • the dosing and injection device can be used both for a plurality of injections if the recovery constant of the spring (2) is considered, and for a single injection if a material for the spring (2) is selected with absence of elastic recovery or active anchoring systems are designed between the plunger (1) and the syringe body (3) in maximum compression position.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Dispersion Chemistry (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Materials For Medical Uses (AREA)
  • Prostheses (AREA)

Abstract

La présente invention concerne un dispositif de dosage pour l'injection de ciments osseux qui comprend un piston (1), un ressort (2) conique compressible et un corps de seringue (3) dans lequel on loge le ressort (2) et le ciment. Le glissement longitudinal du piston (1) provoque la compression du ressort conique (2) et le rapprochement progressif de ses spires permettant l'injectabilité et la poussée du ciment osseux le long de la surface intérieure du corps de la seringue (3). La compression du ressort conique (2) permet le mélange homogène du ciment à l'intérieur du corps (3) par l'effet de cisaillement qui produisent ses spires lorsqu'elles se rapprochent les unes des autres pendant la compression, laquelle se prolonge jusqu'à ce que toutes les spires atteignent la même hauteur minimale et se situent sur le même plan. De cette manière, il se produit une agitation continue du produit à injecter, ce qui garantit son homogénéité et évite les problèmes de filtrat provoqués par la pression.
PCT/ES2013/070076 2012-02-10 2013-02-11 Dispositif de dosage pour l'injection de ciments osseux WO2013117795A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201230200 2012-02-10
ES201230200A ES2422665B1 (es) 2012-02-10 2012-02-10 Dispositivo dosificador para inyeci�n de cementos óseos

Publications (1)

Publication Number Publication Date
WO2013117795A1 true WO2013117795A1 (fr) 2013-08-15

Family

ID=48946936

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2013/070076 WO2013117795A1 (fr) 2012-02-10 2013-02-11 Dispositif de dosage pour l'injection de ciments osseux

Country Status (2)

Country Link
ES (1) ES2422665B1 (fr)
WO (1) WO2013117795A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114669227A (zh) * 2022-03-24 2022-06-28 奥精医疗科技股份有限公司 一种骨水泥的制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9808775B2 (en) 2016-01-29 2017-11-07 Kyphon SÀRL Manual mixer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US928351A (en) * 1907-11-02 1909-07-20 Thomas Bertrand Wilkinson Oil-gun.
FR2178733A1 (fr) * 1972-04-04 1973-11-16 Marin Paul
US4612010A (en) * 1985-08-14 1986-09-16 Hamacher Edward N Infiltration pump
CN101474431A (zh) * 2008-01-02 2009-07-08 陈伟强 一种吸取器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US928351A (en) * 1907-11-02 1909-07-20 Thomas Bertrand Wilkinson Oil-gun.
FR2178733A1 (fr) * 1972-04-04 1973-11-16 Marin Paul
US4612010A (en) * 1985-08-14 1986-09-16 Hamacher Edward N Infiltration pump
CN101474431A (zh) * 2008-01-02 2009-07-08 陈伟强 一种吸取器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114669227A (zh) * 2022-03-24 2022-06-28 奥精医疗科技股份有限公司 一种骨水泥的制备方法

Also Published As

Publication number Publication date
ES2422665A1 (es) 2013-09-12
ES2422665B1 (es) 2014-07-01

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