WO2019057867A1 - Dispositif d'expansion radiale d'une tête de mesure d'acétabulum - Google Patents

Dispositif d'expansion radiale d'une tête de mesure d'acétabulum Download PDF

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Publication number
WO2019057867A1
WO2019057867A1 PCT/EP2018/075553 EP2018075553W WO2019057867A1 WO 2019057867 A1 WO2019057867 A1 WO 2019057867A1 EP 2018075553 W EP2018075553 W EP 2018075553W WO 2019057867 A1 WO2019057867 A1 WO 2019057867A1
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WO
WIPO (PCT)
Prior art keywords
torque
acetabulum
measuring head
rotator
measuring
Prior art date
Application number
PCT/EP2018/075553
Other languages
English (en)
Inventor
Eske WINTHER PETERSEN
Poul Torben Nielsen
Original Assignee
Medichanical Engineering Aps
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 Medichanical Engineering Aps filed Critical Medichanical Engineering Aps
Publication of WO2019057867A1 publication Critical patent/WO2019057867A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2046—Tracking techniques
    • A61B2034/2055—Optical tracking systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2072—Reference field transducer attached to an instrument or patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/031—Automatic limiting or abutting means, e.g. for safety torque limiting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/063—Measuring instruments not otherwise provided for for measuring volume
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • A61F2002/4658—Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • A61F2002/4658—Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length
    • A61F2002/4659—Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length for measuring a diameter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • A61F2002/4663—Measuring instruments used for implanting artificial joints for measuring volumes or other three-dimensional shapes

Definitions

  • the present invention relates to a device for radial expansion of an acetabulum measuring head.
  • Hip joint replacement eliminates pain and restores the function of the hip joint.
  • the number of such operations is expected to increase in the future, due to a larger elderly population and the importance of being physically active even in advanced age.
  • the described technique is rather demanding and requires an experienced physician. If the metal socket is not securely clamped, there is a risk that it may loosen in the course of the first days after the operation. If the metal socket is too strongly clamped, there is a substantial risk of fracture in the pelvis bone around the metal socket, whereby the implant becomes unstable.
  • a measuring head that can adopt several expanded states having different diameters has been developed (SE 1750690-8). Such a device may be used to more precisely determine the shape of the milled cavity and thus to choose the appropriate metal socket which is to be inserted.
  • the access of the measuring head into the acetabulum may be limited, e.g. in a patient with a small incision (as in minimal invasive surgery) or in obese patient where the access often is difficult.
  • a device for radial expansion of an acetabulum measuring head comprising a distal part having a central axis for interaction and expansion of the acetabulum measuring head; a proximal part comprising a rotator for controlling the radial expansion of the acetabulum measuring head; a core within a sheath, said core extending from the proximal part to the distal part; wherein at least one central axis of the core does not coincide with the central axis of the distal part; and wherein a rotation of the rotator of the proximal part of the device leads to a radial expansion of the acetabulum measuring head.
  • an alignment guide system adapted to be connected to the device according to the invention is also provided.
  • a torque- measuring device adapted to be connected to the device according to the invention, wherein the torque-measuring device is adapted to measure a torque force applied to the rotator and/or to yield at a predetermined torque.
  • a system comprising a device according to the invention, an alignment guide system according to the invention and/or a torque-measuring device according to the invention is also provided.
  • Figure la-g show different embodiments of the device according to the invention
  • Figure 2a-b show a device according to an embodiment of the present invention, in which the core of the device is a piston;
  • Figure 3 shows a device according to one embodiment of the present invention, in which the core of the device comprises two cardan joints;
  • Figure 4 show an embodiment of a device with a cam curve interaction between the device and an acetabulum measuring head.
  • Figure 5 shows an alignment guide system according to the invention mounted on a device for radial expansion of an acetabulum measuring head.
  • Figure 6 shows a torque-measuring device according to the invention mounted on a device for radial expansion of an acetabulum measuring head.
  • the device 1 may be used for the radial expansion of an acetabulum measuring head 2.
  • An acetabulum measuring head 2 has a convex upper surface and a connector for connecting to the device 1.
  • the acetabulum measuring head 2, along an axial direction of the connector, may further comprise a central through-going bore adapted to receive an actuating rod 1.6.
  • the acetabulum measuring head 2 is adapted to expand from a relaxed state to an expanded state when the actuating rod 1.6 is axially displaced in the central through-going bore.
  • a device 1 according to the present invention is shown in Figure la-f.
  • the device is shown in Figure la-f.
  • a distal part 1.1 having a central axis a' for interaction and expansion of the acetabulum measuring head 2; a proximal part 1.2 having a central axis c' comprising a rotator 1.3 for controlling the radial expansion of the acetabulum measuring head 2; a core 1.4 within a sheath 1.5.
  • the core 1.4 extends from the proximal part 1.2 to the distal part 1.1. At least one central axis b' of the core 1.4 does not coincide with the central axis a' of the distal part 1.1.
  • a rotation of at least one part of the proximal part 1.2, such as the rotator 1.3, of the device 1 leads to a radial expansion of the acetabulum measuring head 2.
  • the core 1.4 and the distal part 1.1 are thus not aligned along the same axis ( Figures la-f).
  • the central axis b' of the core 1.4 and the central axis a' of the distal part 1.1 intersect, thus forming a first angle A.
  • the first angle A may be between 10° and 90°, preferably 45°.
  • the central axis b' of the core 1.4 and the central axis c' of the proximal part 1.2 may coincide.
  • the device has one angle, i.e. the first angle A ( Figure la).
  • the central axis b' of the core 1.4 and the central axis c' of the proximal part 1.2 may intersect, thus forming a second angle B.
  • the second angle B may be between 90° and 170°, preferably 135°.
  • the device has two angles, i.e. the first angle A and the second angle B ( Figure lb and lc).
  • 1.1 may be parallel, but not coincide with each other ( Figure lb).
  • the third angle may be between
  • the core 1.4 may be divided into two sections 1.4a and 1.4b, each section having a central axis b' and b", which intersect, thus forming a fourth angle D ( Figure Id).
  • the fourth angle may be between 90° and 170°, preferably 135°.
  • the core 1.4 may be divided into three sections 1.4a, 1.4b and 1.4c, each section having a central axis b', b" and b" ⁇
  • the axis b'" and the axis c' of the proximal part 1.2 may intersect, thus forming a fifth angle E ( Figure le).
  • the fifth angle may be between 90° and 170°, preferably 135°.
  • the core 1.4 may comprise at least one part defining a curvature ( Figures If and lg).
  • the curvature may be defined by a circle sector or oval segment.
  • a device according to the present invention makes it possible to access the acetabulum even in patients where the access is limited using a conventional device for measuring a milled cavity in the acetabulum.
  • the distal part 1.1 may comprise an actuating rod 1.6.
  • the actuating rod 1.6 interacts with a face and/or an edge of the central through-going bore inside the measuring head 2, leading to expansion of the measuring head 2.
  • the distal part 1.1 may comprise a cam curve for interaction with the measuring head.
  • the cam curve may be an oval (in a transversal section) top piece interacting with for example an oval (in a transversal section) cut out in the acetabulum measuring head.
  • the device with an outer/lateral expansion part.
  • the expansion part is segmented and has a lumen with a transversal section corresponding to the transversal section of the top piece, such that the rotation of the top piece relative to the expansion part will make the segments of the expansion part to separate resulting in an expansion of the outer circumference of the expansion part, which in turn may interact in a corresponding manner to expand a measuring head arranged on the device.
  • a rotation of the rotator 1.3 of the proximal part 1.2 leads to the lateral expansion of the expansion part. As the outer expansion part expands the acetabulum measuring head is expanded.
  • the measuring head may have a through going bore adapted to the lateral surface of the segmented expansion part, whereby rotation of the non- concentric part will lead to a lateral/radial expansion of the segmented expansion part which in turn will expand segments of a measuring head positioned onto the device.
  • the rotation of the rotator 1.3 of the proximal part 1.2 may lead to the rotation of a non-concentric part of the actuation rod, which is adapted to interact with the face and/or edge of the central through-going bore inside the measuring head, which leads to the expansion of the measuring head.
  • the rotation of the core 1.4 will rotate the non-concentric part inside a corresponding through going bore, such that the non-concentric part will push segments of the measuring head radially/laterally outwards.
  • the rotation of the rotator 1.3 of the proximal part 1.2 may lead to the rotation of a non-concentric part, which leads to the expansion of the measuring head.
  • Figure 2a shows a device 1 according to the present invention in which central axis b' of the core 1.4 and the central axis c' of the proximal part 1.2 coincide and wherein one piston 1.7a is extended from the distal part 1.2 and throughout the core 1.4.
  • the rotation of the rotator 1.3 of the proximal part 1.2 of the device 1 leads to the displacement of the piston 1.7a in the core 1.4 within the sheath 1.5. This leads to the axial displacement of the actuating rod 1.6 and thereby to the radial expansion of the acetabulum measuring head (2).
  • Figure 2b shows a device 1 according to the present invention in which a first piston 1.7a is located in the proximal part 1.2 and a second piston 1.7b is located in the core 1.4.
  • the rotation of the rotator 1.3 of the proximal part 1.2 of the device 1 leads to the displacement of piston 1.7a, which in turn leads to the displacement of piston 1.7b in the core 1.4 within the sheath 1.5.
  • This embodiment has the benefit of providing a more accurate system, since the rotational force applied to the device 1 is more controlled. Furthermore, the embodiment provides increased feedback to the user. More specifically, if the device is arranged with torque-measuring device 4 adapted to measure a torque force applied to the rotator 1.3 and/or to yield at a predetermined torque (as will be described more in detail with reference to Fig. 6), the device 1 provides a higher accuracy in the measurement readings.
  • first piston 1.7a and a second piston 1.7b are non- complex solutions that reduces the manufacturing time and costs.
  • the rotator 1.3 may be part of a central through going rod which is rotated in order to cause expansion.
  • the proximal end 1.2 and the core 1.4 are comprised of a cardan shaft 1.8.
  • the expansion is provided through a thread between the cardan shaft 1.8 and a piston.
  • a rotation of the cardan shaft 1.8 leads to the axial displacement of the piston going into the acetabulum measuring head 2.
  • the acetabulum measuring head 2 is expanded.
  • Fig 4 shows an embodiment in which the proximal end 1.2 and the core 1.4 are comprised of a cardan shaft 1.8.
  • the expansion is provided through the use of a suitable cam curve at the distal end of the cardan shaft 1.8.
  • the cam curve may be an oval top piece interacting with an oval cut out in an outer expansion part. As the outer expansion part expands the acetabulum measuring head 2 is expanded.
  • the acetabulum measuring head 2 comprises a convex upper surface adapted to be in contact with the milled cavity of the acetabulum.
  • the measuring adapter has one relaxed state and may adopt several expanded states depending on the degree of the radial expansion. Thus, the size of the milled cavity in the acetabulum may be accurately determined.
  • the acetabulum measuring head 2 may further comprise a central through-going bore adapted to receive an actuating rod 1.6 and the acetabulum measuring head 2 is adapted to expand from a relaxed state to an expanded state when the actuating rod 1.6 is axially displaced in the central through-going bore.
  • the device 1 may comprise a measuring scale, translating rotation the rotator 1.3 of the proximal part 1.2 in relation to expansion of the acetabulum measuring head 2.
  • the distal part 1.1 comprises an actuating rod 1.6 and wherein a rotation of the rotator 1.3 of the proximal part 1.2 leads to the actuating rod 1.6 being axially displaced along the central axis a' of the distal part 1.1.
  • the acetabulum measuring head 2 adopts several expanded states depending on the position of the actuating rod 1.6 in the central through-going bore of the acetabulum measuring head 2.
  • a part of the actuation rod 1.6 will interact with a face and/or an edge of the central through-going bore inside the acetabulum measuring head 2.
  • the part of the actuation rod 1.6 which is adapted to interact with the face and/or edge of the central through-going bore inside the acetabulum measuring head 2, is conical.
  • an alignment guide system 3 adapted to be connected to the device 1 according to the invention is also provided and shown in Fig. 5.
  • the alignment guide system 3 is selected from the group consisting of pins positioned in fixed angles relative to the distal part 1.1 of the device 1, at least one spirit level, such as a bulls eye spirit level, at least one protractor and a laser guided system.
  • the alignment guide system 3 prevents the system from being misused in form of rotating the wrong part in relation to the patient, since the alignment guide system 3 assures that it is the rotator 1.3 that is rotated in relation to the patient.
  • the alignment guide system 3 ensures that the surgeon, or operator, using the device 1 is using the device properly.
  • the alignment guide system 3 is inserted into the device 1, it prevents wrong parts of the device 1 to be rotated.
  • the alignment guide system 3 ensures that the acetabulum measuring head 2 is inserted into the milled cavity in the acetabulum at the desired angle relative to the acetabulum.
  • the alignment guide system 3 is digital.
  • Fig 5 shows an alignment guide system 3 according to the invention mounted on a device for radial expansion of an acetabulum measuring head 2.
  • the alignment guide system 3 may be mounted to the proximal part 1.2 of the device 1 in order to prevent rotation of said part.
  • the mounting may be achieved by mounting holes or similar.
  • a torque- measuring device 4 adapted to be connected to the device 1 according to the invention is also provided, wherein the torque-measuring device 4 is adapted to measure a torque force applied to the rotator 1.3 and/or to yield at a predetermined torque.
  • Fig 6 shows a torque-measuring device 4 according to the invention mounted on a device for radial expansion of an acetabulum measuring head 2.
  • the torque- measuring device 4 is mounted around the rotator 1.3 of the proximal part 1.2 of device for radial expansion of an acetabulum measuring head 2.
  • the torque-measuring device 4 comprises two parts, a first part 4.1 and a second part 4.2.
  • the second part 4.2 is attached to the rotator 1.3 of the proximal part 1.2 of the device.
  • a roller 4.3 is attached to a spring 4.4, which is anchored in the second part 4.2 of the torque-measuring device 4.
  • the roller 4.3 interacts with the walls of a recess 4.1a in the first part 4.1 of the torque-measuring device 4.
  • the spring 4.4 exerts a force on the roller 4.3, pressing the roller 4.3 towards the walls of the recess 4. la in the first part 4.1 of the torque- measuring device 4.
  • the roller 4.3 is displaced together with the first part 4.1.
  • the second part 4.2 of the torque-measuring device 4 is also rotated and thus the rotator 1.3 is also rotated, which leads to a radial expansion of the acetabulum measuring head 2.
  • the spring 4.4 is compressed and the roller 4.3 no longer interacts with the recess 4. la of the first part 4.1 of the torque-measuring device 4.
  • the second part 4.2 of the torque-measuring device 4 does not rotate.
  • the rotator 1.3 is also not rotated and the acetabulum measuring head 2 is not further expanded.
  • the device for radial expansion of an acetabulum measuring head 2 may be according to the present invention.
  • the device for radial expansion of an acetabulum measuring head 2 may be a conventional straight device for radial expansion of an acetabulum measuring head 2.
  • the predetermined torque may be adjusted by adjusting the compression of the spring 4.4 or by using different springs.
  • the roller 4.3 may have an essentially round surface.
  • the spring 4.4 may be directly anchored to the rotator 1.3.
  • roller 4.3 may be replaced by a glider.
  • the torque-ring may be for single use.
  • the spring 4.4 in the embodiment described above is replaced by a piece of material that breaks at a specific force.
  • the material may be plastic.
  • the torque-measuring device 4 may be adapted to measure the torque force applied.
  • the torque-measuring device 4 may be adapted to yield at a predetermined torque. This will prevent the acetabulum measuring head 2 from expanding too much and thereby exerting a too strong force on the walls of the milled cavity of the acetabulum, thus minimizing the risk of damaging the acetabulum.
  • the predetermined torque may be between 0.05 kg*m and 0.75 kg*m.
  • the torque-measuring device 4 may alternatively be used to test the rotational stability of the acetabulum measuring head 2 in the acetabulum.
  • the torque-measuring device 4 may be a torque-ring.
  • the torque ring may be mounted around the rotator 1.3 of the proximal part 1.2 of the device 1.
  • the torque ring may be mounted inside the rotator 1.3 of the proximal part 1.2 of the device 1.
  • the torque-measuring device 4 comprises a torque ring, said torque ring driving a movement of the core 1.4 in relation to the sheath 1.5, until a set resistance threshold value.
  • the resistance threshold value may be between 0.05 kg*m and 0.75 kg*m.
  • the torque-measuring device 4 is adapted to be mounted around the rotator 1.3 of the proximal part 1.2 of the device 1.
  • the torque-measuring device 4 is adapted to be mounted inside the rotator 1.3 of the proximal part 1.2 of the device 1.
  • a system comprising a device 1 according to the invention, an alignment guide system 3 according to the invention and/or a torque-measuring device 4 according to the invention is also provided.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transplantation (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

La présente invention concerne un dispositif (1) d'expansion radiale d'une tête de mesure d'acétabulum (2). Le dispositif comprend une partie distale (1.1) ayant un axe central (a') pour l'interaction et l'expansion de la tête de mesure d'acétabulum (2), une partie proximale (1.2) comprenant un rotateur (1.3) commandant l'expansion radiale de la tête de mesure d'acétabulum (2), un noyau (1,4) à l'intérieur d'une gaine (1,5), ledit noyau (1.4) s'étendant de la partie proximale (1.2) à la partie distale (1.1), au moins un axe central (b') du noyau (1.4) ne coïncidant pas avec l'axe central (a') de la partie distale (1.1), et une rotation du rotateur (1.3) de la partie proximale (1.2) du dispositif (1) conduisant à une expansion radiale de la tête de mesure d'acétabulum (2). La présente invention concerne en outre un système de guidage d'alignement (3) conçu pour être raccordé au dispositif (1), un dispositif de mesure de couple (4) conçu pour être raccordé au dispositif (1) et à un système comprenant le dispositif (1), le système de guidage d'alignement (3) et/ou le dispositif de mesure de couple.
PCT/EP2018/075553 2017-09-22 2018-09-21 Dispositif d'expansion radiale d'une tête de mesure d'acétabulum WO2019057867A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1751180-9 2017-09-22
SE1751180 2017-09-22

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WO2019057867A1 true WO2019057867A1 (fr) 2019-03-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0229676A2 (fr) * 1983-10-19 1987-07-22 Pfizer Hospital Products Group, Inc. Calibre acétabulaire et canon de perçage
WO2004034904A1 (fr) * 2002-10-21 2004-04-29 Poul Torben Nielsen Equipement de mesure a utiliser en connexion avec une pose de prothese des hanches
US20070293869A1 (en) * 2005-12-20 2007-12-20 Howmedica Osteonics Corp. Curved acetabular positioner, impactor and reamer handle
US20120136360A1 (en) * 2010-11-25 2012-05-31 Benoist Girard Sas Prosthetic acetabular cup inserter and impactor
US8398650B1 (en) * 2009-01-27 2013-03-19 Greatbatch Medical S.A. Offset cup impactor with an expandable dome for double mobility implants

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* Cited by examiner, † Cited by third party
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EP0229676A2 (fr) * 1983-10-19 1987-07-22 Pfizer Hospital Products Group, Inc. Calibre acétabulaire et canon de perçage
WO2004034904A1 (fr) * 2002-10-21 2004-04-29 Poul Torben Nielsen Equipement de mesure a utiliser en connexion avec une pose de prothese des hanches
US20070293869A1 (en) * 2005-12-20 2007-12-20 Howmedica Osteonics Corp. Curved acetabular positioner, impactor and reamer handle
US8398650B1 (en) * 2009-01-27 2013-03-19 Greatbatch Medical S.A. Offset cup impactor with an expandable dome for double mobility implants
US20120136360A1 (en) * 2010-11-25 2012-05-31 Benoist Girard Sas Prosthetic acetabular cup inserter and impactor

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