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WO2003026539A1 - Dispositif de fixation sur une prothese digitale - Google Patents

Dispositif de fixation sur une prothese digitale Download PDF

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Publication number
WO2003026539A1
WO2003026539A1 PCT/SE2002/001514 SE0201514W WO03026539A1 WO 2003026539 A1 WO2003026539 A1 WO 2003026539A1 SE 0201514 W SE0201514 W SE 0201514W WO 03026539 A1 WO03026539 A1 WO 03026539A1
Authority
WO
WIPO (PCT)
Prior art keywords
prosthesis
finger
fixing device
finger prosthesis
joint
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.)
Ceased
Application number
PCT/SE2002/001514
Other languages
English (en)
Inventor
Stellan Brimalm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BERGOMED AB
Original Assignee
BERGOMED AB
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 BERGOMED AB filed Critical BERGOMED AB
Publication of WO2003026539A1 publication Critical patent/WO2003026539A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/54—Artificial arms or hands or parts thereof
    • A61F2/58—Elbows; Wrists ; Other joints; Hands
    • A61F2/583—Hands; Wrist joints
    • 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
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/54—Artificial arms or hands or parts thereof
    • A61F2/58—Elbows; Wrists ; Other joints; Hands
    • A61F2/583—Hands; Wrist joints
    • A61F2/586—Fingers
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305—Snap connection
    • 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
    • A61F2/50—Prostheses not implantable in the body
    • A61F2002/5038—Hinged joint, e.g. with transverse axle restricting the movement
    • A61F2002/5043—Hinged joint, e.g. with transverse axle restricting the movement with rotation-limiting stops, e.g. projections or recesses
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements

Definitions

  • the present invention concerns a device for fixing a finger prosthesis to another prosthesis part e.g. a metacarpus prosthesis.
  • the finger prosthesis and metacarpus prosthesis are intended to replace corresponding lost body parts.
  • the prosthesis to replace the lost body parts must be easy to repair and also have a Cost-effective construction.
  • a prosthesis cover which is normally made of a substantially elastic material.
  • the cover has a friction which depends amongst others on the material from which it is made.
  • the cover must also resemble the human skin and protect the structural parts from dirt.
  • the cover is removed from the prosthesis finger and then replaced, which is difficult for many users in particular for users with both hands amputated.
  • the object of the invention is to solve one or more of the above problems.
  • a fixing device for fastening the finger prosthesis to another prosthesis part e.g. a metacarpus prosthesis, which part is intended to replace at least part of the human hand
  • the finger prosthesis at the fixing device has a first joint designed to allow a bending of the finger prosthesis from a forward direction in an extension of the extended finger, in a bending direction towards a palm and back to the extended position
  • the fixing device with another joint designed to allow pivoting in a direction substantially orthogonal to a forward direction in the extension of an extended finger prosthesis, and a spring element arranged supporting between the finger prosthesis and the prosthesis part
  • the prosthesis fingers can be substantially held in a predetermined position.
  • the prostheses have an e.g. lateral flexibility which facilitates for example the application and removal of the prosthesis cover.
  • the prosthesis fingers can also be moved from this position by means of an external force so that e.g. several prosthesis fingers arranged next to each other can give good support to each other.
  • Rg. 1 shows a diagrammatic cross-section view of a fixing device according to the invention in a view from the side in a preferred embodiment
  • Fig. 2 shows a diagrammatic sketch of a finger prosthesis with a fixing device according to the invention at a metacarpus prosthesis in a view from above,
  • Fig. 3 shows a diagrammatic sketch according to figure 2 with the prosthesis fingers in a laterally blocked position
  • Fig. 4 shows a diagrammatic cross-section sketch of a fixing device according to the invention in a view from the side in an alternative embodiment
  • Fig. 5 shows a partial enlargement of a fixing in figure 4
  • Rg. 6 shows a diagrammatic cross-section View of a fixing device according to the invention in a view from above in an alternative embodiment.
  • Fig, 7 shows a partial enlargement of a fixing in figure 6
  • Rg. S shows in perspective a substantially complete artificial hand prosthesis in a view showing the prosthesis knuckles
  • Rg. 9 shows in perspective a substantially complete artificial hand prosthesis in a view showing the prosthesis palm
  • Rg. 10 shows a diagrammatic sketch according to figure 2 with the prosthesis fingers in a laterally compressed position
  • Fig. 11 shows a diagrammatic sketch according to figure 2 with the prosthesis fingers with a motor for sideways pivoting.
  • a fixing device for fastening a finger prosthesis is generally referred to as 1 and the finger prosthesis as 2.
  • the device 1 is arranged at a rear part of the prosthesis 2 and is designed to attach the prosthesis finger bendably and p ⁇ votably to another prosthesis part 3 e,g, a metacarpus prosthesis 3.
  • the prosthesis parts 2, 3 substantially have natural size and are designed to simulate the corresponding human body parts in appearance, size and movement pattern.
  • a first joint 4 about which the prosthesis finger 2 is designed to be able to bend repeatedly from a forwards direction ( ) in the extension of the extended fingers, in a bend direction I towards the palm 5 and back to the extended position of the finger prosthesis 2.
  • a second joint 6 is also arranged at the fixing element and is intended to allow a pivoting in direction S substantially orthogonal to the forward direction R.
  • the joint 6 comprises an at least partially spherical body 9 which is connected to the finger prosthesis 2 by means of a rod 8.
  • Body 9 is placed in a position between two clamping elements 10a, 10b, which each have a partially spherical concave surface corresponding to the shape of body 9 so that body 9 can be clamped between the two concave surfaces,
  • the clamping is achieved e.g. by clamping screws (not shown) or a similar device.
  • the damping elements hold the body 9 in position while the body is pivoted and thus allow the finger prosthesis 2 to pivot.
  • Pivoting takes place in directions substantially orthogonal to the forward direction R up to 30° from the forward direction R and preferably up to 15°. This pivoting can also be described as an angle change in any direction about the fixing of the finger prosthesis 2 from a straight position.
  • a spring element 7 exemplified in figure l by an 0-r ⁇ ng is arranged about the rod 8 and clamped against the rod 8 by a recess 11 though which runs the rod-
  • the rod 8 is centred in the middle of the recess 11 and on pivoting of the finger prosthesis 2 about the second joint 6, on subsequent release of the finger prosthesis 2 causes a return to a position for the rod 8 in the middle of recess 11 and hence also a return of finger prosthesis 2 to a predetermined position substantially in the forward direction F.
  • the predetermined position of finger prosthesis 2 can constitute a position for the finger prosthesis 2 slightly different from the forward direction F and the bent direction I.
  • the fixing device can be provided with a stop preferably arranged at the rod 8 or body 9 and produced as a projection (not shown) intended at maximum turn to stop against the other prosthesis 3.
  • finger prostheses 2, 2a, 2b, 2c When several finger prostheses 2, 2a, 2b, 2c are arranged next to each other according to figs. 2, 3 and 8 - 10, this means that finger prostheses 2, 2a, 2b, 2c on pivoting can be brought into contact with each other and thus cooperate to absorb e.g. force F from the side as shown in figure 10.
  • the capacity to absorb force F from the side depends amongst others on the combined factors firstly of the fixed individual capacity of finger prostheses 2, 2a, 2b, 2c to resist an angle change and secondly their individual capacity to resist a position change in direction F due to the shear forces occurring between the finger prostheses 2, 2a, 2b, 2c on side loading at the contact point between the finger prostheses 2, 2a, 2b, 2c,
  • the fixing device 1 comprises an extended spring element e.g. made of a piece of piano wire attached at its ends in the second prosthesis part 3.
  • the spring element 7' runs substantially with its centre through a passage 11 in a projection 9a protruding from finger prosthesis 2.
  • finger prosthesis 2 is plvotably fastened to the other prosthesis part (3) by means of a screw 6', When the finger prosthesis 2 pivots about the screw 6', the passage 11 in projection 9' is also moved which means that spring element 7' bends.
  • the finger prosthesis is released the spring element straightens and returns the finger prosthesis to the predetermined position.
  • the joint is integrated in the spring element and comprises a spring rod which is attached at a first end to finger prosthesis 2 and extends from this substantially in the extension of finger prosthesis 2 to a fixing in the other prosthesis 3.
  • the rod On pivoting of finger prosthesis the rod is exposed to a force absorbed by the rod and its fixings, and finger prosthesis 2 pivots back due to a return of the rod to its original position.
  • the projection 9' or ball 9 is connected to a motor 12 Intended to pivot the Finger prosthesis preferably sideways s, which is exemplified in figure 12 when projection 9" is extended and connected to motor 12 designed to draw together or move apart the extended projection 9" so that finger prostheses 2, 2a, 2b, 2c pivot.
  • This increases the gripping capacity as the finger prostheses 2, 2a, 2b, 2c can be moved apart before gripping and thus finger prostheses 2, 2a, 2b, 2c can grip over a larger area.

Landscapes

  • Health & Medical Sciences (AREA)
  • Prostheses (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)

Abstract

L'invention concerne un dispositif de fixation (1) destiné à fixer une prothèse digitale (2), de taille sensiblement naturelle, par exemple une prothèse métacarpienne (3) conçue pour remplacer au moins partiellement une main humaine. La prothèse digitale (2) comporte, sur le dispositif de fixation (1), une première articulation (4) permettant un pliage de la prothèse (2) d'une direction avant (R), dans laquelle la prothèse digitale est en extension, à une direction de pliage (I) vers une paume (5), avec retour à la position en extension. Le dispositif de fixation (1) comprend une seconde articulation (6) permettant un pivotement dans une direction sensiblement orthogonale à la direction avant (R).
PCT/SE2002/001514 2001-08-27 2002-08-26 Dispositif de fixation sur une prothese digitale Ceased WO2003026539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0102837A SE0102837D0 (sv) 2001-08-27 2001-08-27 Fästanordning vid en fingerprotes
SE0102837-2 2001-08-27

Publications (1)

Publication Number Publication Date
WO2003026539A1 true WO2003026539A1 (fr) 2003-04-03

Family

ID=20285132

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/001514 Ceased WO2003026539A1 (fr) 2001-08-27 2002-08-26 Dispositif de fixation sur une prothese digitale

Country Status (2)

Country Link
SE (1) SE0102837D0 (fr)
WO (1) WO2003026539A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746023C (de) * 1941-03-28 1944-05-31 Wilhelm Scheele Kuenstlicher Arm
US2549074A (en) * 1948-08-05 1951-04-17 Northrop Aircraft Inc Artificial hand with worm and gear drive to thumb
US3258784A (en) * 1963-08-05 1966-07-05 Noel J Brown Prosthetic hand with overload release means and means for adjusting relative finger and thumb positions
US3413658A (en) * 1965-10-20 1968-12-03 Daniel B. Becker Artificial hand having a body constructed from separate molded plastic parts for easier replacement of damaged parts
US3694021A (en) * 1970-07-31 1972-09-26 James F Mullen Mechanical hand

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746023C (de) * 1941-03-28 1944-05-31 Wilhelm Scheele Kuenstlicher Arm
US2549074A (en) * 1948-08-05 1951-04-17 Northrop Aircraft Inc Artificial hand with worm and gear drive to thumb
US3258784A (en) * 1963-08-05 1966-07-05 Noel J Brown Prosthetic hand with overload release means and means for adjusting relative finger and thumb positions
US3413658A (en) * 1965-10-20 1968-12-03 Daniel B. Becker Artificial hand having a body constructed from separate molded plastic parts for easier replacement of damaged parts
US3694021A (en) * 1970-07-31 1972-09-26 James F Mullen Mechanical hand

Also Published As

Publication number Publication date
SE0102837D0 (sv) 2001-08-27

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