GB2420769A - Femoral head protector - Google Patents

Femoral head protector Download PDF

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Publication number
GB2420769A
GB2420769A GB0426531A GB0426531A GB2420769A GB 2420769 A GB2420769 A GB 2420769A GB 0426531 A GB0426531 A GB 0426531A GB 0426531 A GB0426531 A GB 0426531A GB 2420769 A GB2420769 A GB 2420769A
Authority
GB
United Kingdom
Prior art keywords
protector
femoral head
head
size
ridge
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.)
Withdrawn
Application number
GB0426531A
Other versions
GB0426531D0 (en
Inventor
Marcus Daniels
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0426531A priority Critical patent/GB2420769A/en
Publication of GB0426531D0 publication Critical patent/GB0426531D0/en
Publication of GB2420769A publication Critical patent/GB2420769A/en
Withdrawn legal-status Critical Current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
    • A61F2/0095—Packages or dispensers for prostheses or other implants
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • A61F2/3603—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices implanted without ablation of the whole natural femoral head
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/3071—Identification means; Administration of patients
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30718—Means for protecting prosthetic parts, e.g. during operation
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0085—Identification means; Administration of patients
    • A61F2250/0089—Identification means; Administration of patients coded with symbols, e.g. dots, numbers, letters, words

Landscapes

  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (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)
  • Prostheses (AREA)

Abstract

A Head Protector is a pre-shaped moulded foam Cup form, intended to fit over an orthopaedic Femoral Head in order to protect its highly polished surface finish. A specific size of Protector is required for each size of Femoral Head to ensure a snug fit. The finished form of the Protector has a totally sealed surface to ensure that under normal use no foam particles are shed. The Protector is a hollow hemispherical shape with a skirt 1 that extends down past the diameter of the Head when fitted. The open-ended skin terminates in a small lip 2, which flares out at ninety degrees to the spherical profile. A ridge or fold 3 is incorporated into the molding along one crest axis. This ridge (or fold) is accentuated at the apex to form a tag 4. Large figures 5 are embossed on one side of the Protector to indicate the size of Femoral Head to which the protector relates.

Description

HEAD PROTECTOR
DESCRIPTION
Within the orthopaedic component manufacturing industry there has always been a need to provide adequate protection for the highly polished surface finish of Femoral Heads. In the past, the problem has been solved in a number of ways, but these have usual contained inherent problems of their own. Packing the product directly into blister packs can still risk marking the head surface due to the relatively hard surface of the material used to manufacture the blister packs. "Stockinette" tubing provides a much softer interface, but there is always a slight risk of material shedding.
A novel approach to this problem is the use of ALVEO PU Foam in a preshaped Cup form that is intended to fit over the Fernoral Head. A specific size of Head Protector is required for each size of Femoral Head to ensure a snug fit. The finished form of the Protector has a totally sealed surface to ensure that under normal use no foam particles are shed.
The essential features of this invention are that it shall be a hollow hemispherical shape with a skirt that extends down past the diameter of the Head to ensure stable fixation when fitted. For ease of production, the open-ended skirt shall terminate in a small lip, which flares out at ninety degrees to the spherical profile. Along the outer crest of the hemisphere a ridge or fold is incorporated into the moulding. This ridge (or fold) is accentuated at the apex to form a tag, thus enabling the Protector to be pinched between index finger and thumb to facilitate removal of the Protector from the Head without touching the Head surface. The size of the Femoral Head, to which the protector relates, is embossed in large figures on one side of the Protector.
Figure 1 shows the Protector in a relative position above a typical Femoral Head prior to fitting. Design of the Protector is such that it is required to stretch a little when fitted, in order to ensure that it grips the Head and does not become detached during packaging or transit. It shows the skirt 1 that extends down past the diameter of the Head. The skirt terminates in a small lip 2. A ridge or fold 3 is incorporated into the molding and this is accentuated at the apex to form a tag 4. The size of the relative Fernoral Head is embossed in large figures 5 on one side of the Protector.
Figure 2 shows the Protector in side view to further illustrate the crest ridge 3, culminating in the finger tag 4 used during removal. Thickness of the finished product is approximately 2mm.
It is intended that the Head Protector shall form an interface between the highly polished surface of the Femoral Head and any form of packaging prior to sterilization, e.g. Peel pouch or blister pack.
The specific foam used for this moulded product is ALVEOLIT TA3000. This is an ALVO P0 FOAM and has been tested and certified for Health Care Applications.

Claims (8)

HEAD PROTECTOR CLAIMS
1. A pre-shaped Cup form moulding, intended to fit over an orthopaedic Femoral Head in order to protect its highly polished surface finish.
2. A specific size of Protector, as claimed in Claimi, for each size of Femoral Head.
3. A Protector as claimed in Claim 1 or Claim 2 where the raw foam material is specifically moulded in Cup form to create a totally sealed surface.
4. A ridge or fold incorporated into the moulding along the crest of the cup shape, with the ridge (or fold) accentuated at the apex of the cup to form a tag.
5. Large figures embossed on one side of the Protector to identify the size of Femoral Head to which the protector relates.
6. A Protector as claimed in any preceeding Claim, which is intended to form an interface between the highly polished surface of a Femoral Head and any form of packaging.
7. A Protector as claimed in any preceding Claim, which is made from a specific foam, namely ALVEOLIT TA3000, which is an ALVO P0 FOAM.
8. A Protector, substantially as herein described above and illustrated in the accompanying drawings.
GB0426531A 2004-12-03 2004-12-03 Femoral head protector Withdrawn GB2420769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0426531A GB2420769A (en) 2004-12-03 2004-12-03 Femoral head protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0426531A GB2420769A (en) 2004-12-03 2004-12-03 Femoral head protector

Publications (2)

Publication Number Publication Date
GB0426531D0 GB0426531D0 (en) 2005-01-05
GB2420769A true GB2420769A (en) 2006-06-07

Family

ID=34043990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0426531A Withdrawn GB2420769A (en) 2004-12-03 2004-12-03 Femoral head protector

Country Status (1)

Country Link
GB (1) GB2420769A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1920736A1 (en) * 2006-11-07 2008-05-14 ESKA-medical Gesellschaft für Entwicklung und Vertrieb von medizinischen Implantat-Artikeln mbH Joint part cap implant for an artificial hip joint
EP2323593A2 (en) * 2008-05-27 2011-05-25 Smith & Nephew, Inc. Cup sheath to prevent soft tissue impingement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818514A (en) * 1971-08-09 1974-06-25 Thackray C F Ltd Femoral prosthesis with removable protective sheath
GB2042897A (en) * 1978-12-22 1980-10-01 Charnley Surgical Inventions Prosthesis Sheath for Femoral Prosthesis
FR2656792A1 (en) * 1990-01-10 1991-07-12 Astel Sarl Device for holding and manipulating the head of a prosthetic articulation, and in particular the head of a femoral implant
US6585771B1 (en) * 1998-03-26 2003-07-01 Ceramtec Ag Innovative Ceramic Engineering Device for handling ball heads of joint prostheses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818514A (en) * 1971-08-09 1974-06-25 Thackray C F Ltd Femoral prosthesis with removable protective sheath
GB2042897A (en) * 1978-12-22 1980-10-01 Charnley Surgical Inventions Prosthesis Sheath for Femoral Prosthesis
FR2656792A1 (en) * 1990-01-10 1991-07-12 Astel Sarl Device for holding and manipulating the head of a prosthetic articulation, and in particular the head of a femoral implant
US6585771B1 (en) * 1998-03-26 2003-07-01 Ceramtec Ag Innovative Ceramic Engineering Device for handling ball heads of joint prostheses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1920736A1 (en) * 2006-11-07 2008-05-14 ESKA-medical Gesellschaft für Entwicklung und Vertrieb von medizinischen Implantat-Artikeln mbH Joint part cap implant for an artificial hip joint
EP2323593A2 (en) * 2008-05-27 2011-05-25 Smith & Nephew, Inc. Cup sheath to prevent soft tissue impingement
EP2323593A4 (en) * 2008-05-27 2013-10-02 Smith & Nephew Inc Cup sheath to prevent soft tissue impingement

Also Published As

Publication number Publication date
GB0426531D0 (en) 2005-01-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)