GB2380678A - Improvements in or Relating to a Surgical Screw-Threaded Fastening Device - Google Patents

Improvements in or Relating to a Surgical Screw-Threaded Fastening Device Download PDF

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Publication number
GB2380678A
GB2380678A GB0124072A GB0124072A GB2380678A GB 2380678 A GB2380678 A GB 2380678A GB 0124072 A GB0124072 A GB 0124072A GB 0124072 A GB0124072 A GB 0124072A GB 2380678 A GB2380678 A GB 2380678A
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GB
United Kingdom
Prior art keywords
fastening device
surgical screw
screw
threaded fastening
threaded
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.)
Granted
Application number
GB0124072A
Other versions
GB0124072D0 (en
GB2380678B (en
Inventor
Simon Nicholas Collins
Ian James Emslie
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.)
CORIN SURGICAL Ltd
Corin Ltd
Original Assignee
CORIN SURGICAL Ltd
Corin Ltd
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 CORIN SURGICAL Ltd, Corin Ltd filed Critical CORIN SURGICAL Ltd
Priority to GB0124072A priority Critical patent/GB2380678B/en
Publication of GB0124072D0 publication Critical patent/GB0124072D0/en
Publication of GB2380678A publication Critical patent/GB2380678A/en
Application granted granted Critical
Publication of GB2380678B publication Critical patent/GB2380678B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • 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
    • A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced 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
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0847—Mode of fixation of anchor to tendon or ligament
    • A61F2002/0858—Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges
    • 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
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0876—Position of anchor in respect to the bone
    • A61F2002/0888—Anchor in or on a blind hole or on the bone surface without formation of a tunnel

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Neurology (AREA)
  • Rehabilitation Therapy (AREA)
  • Rheumatology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

A surgical screw-threaded fastening device comprises a surgical screw-threaded element, which is externally threaded and has a through-bore, and a surgical bio-compatible blanking plug 10 which is engageable with the screw-threaded element to prevent or substantially prevent fluid leaking through the through-bore. A surgical gripping tool in combination with such a screw-threaded fastening device, and methods of using such a surgical screw-threaded fastening device are also provided.

Description

<Desc/Clms Page number 1>
Improvements in or relating to a surgical screw-threaded fastening device This invention relates to a surgical screw-threaded fastening device, a surgical gripping tool in combination with such a screw-threaded fastening device, and a method of using such a surgical screw-threaded fastening device.
A damaged anterior cruciate ligament hereinafter referred to as ACL is often replaced with a graft from a patellar tendon or a semitendinosus tendon. In the case of the patellar tendon, small bone blocks are attached to its ends. Tunnels are formed in the tibia and femur for use in implanting the graft in the patient's knee. The bone blocks of the graft are then secured in the tunnels by fixation means, typically in the form of surgical screw-threaded elements which form an interference fit between the bone block and the tunnel wall.
To simplify alignment, the screw-threaded elements typically have a throughbore or cannulation. A guide pin is sited at the point of the femoral tunnel at which the screw-threaded element is to be inserted, and the screw-threaded element is guided over the guide pin and forcibly engaged between the bone block and the femoral tunnel wall.
A further cannulated screw-threaded element is often used to similarly secure the remaining bone block in the tibial tunnel.
A disadvantage that becomes apparent with the use of surgical cannulated
<Desc/Clms Page number 2>
screw-threaded elements is that the cannulation provides a conduit through which body fluid can pass. In the above-described instance, the formation of the tibial tunnel and the use of a cannulated screw-threaded element provides a passage along which synovial fluid can drain causing synovitis/bursitis.
The present invention seeks to overcome this problem.
According to a first aspect of the present invention, there is provided a surgical screw-threaded fastening device comprising a surgical screw-threaded element, which is externally threaded and has a through-bore, and a surgical biocompatible blanking plug which is engageable with the screw-threaded element to prevent or substantially prevent fluid leaking through the through-bore.
A'through-bore'is, in the art, commonly known as a'cannulation', and the use of either term is intended to be construed as including the other.
Preferable and/or optional features of the first aspect of the present invention are set forth in claims 2 to 16.
According to a second aspect of the present invention, there is provided a surgical gripping tool in combination with a surgical screw-threaded fastening device in accordance with the first aspect of the present invention, wherein the surgical tool is adapted to be securely and releasably engagable with the grippable portion of the blanking plug.
<Desc/Clms Page number 3>
According to a third aspect of the present invention, there is provided a method of preventing or substantially preventing leakage of fluid when using a surgical screw having a through-bore, the method comprising the steps of: a) selecting a surgical screw-threaded fastening device in accordance with the first or second aspect of the present invention, b) inserting the surgical screw-threaded element into the patient, and c) engaging the blanking plug to block the through-bore of the screwthreaded element.
According to a fourth aspect of the present invention, there is provided a method of preventing or inhibiting synovitis/bursitis following the use of a surgical screw having a through-bore during anterior cruciate ligament surgery, the method comprising the steps of: a) selecting a surgical screw-threaded fastening device in accordance with the first or second aspect of the present invention, b) inserting the surgical screw-threaded element into the tibia of the patient to fix a bone plug in place, and c) engaging the blanking plug to block the through-bore of the screw-
<Desc/Clms Page number 4>
threaded element to prevent or substantially prevent passing of synovial fluid therethrough.
The invention will now be more particularly described, by way of example only, with reference to the accompanying drawing which shows an enlarged perspective view of one embodiment of part of a surgical screw-threaded fastening device in accordance with the present invention.
With reference to the drawing, a surgical screw-threaded fastening device comprises a known surgical screw-threaded element (not shown) and a surgical blanking plug 10. The screw-threaded element, which is typically formed from metal, such as titanium, but which may be of any other suitable bio-compatible material, is externally threaded and has a through-bore which extends along its longitudinal axis.
A non-circular socket, which is coaxial with and part of the through bore, is formed in the proximal end of the screw-threaded element. The socket is adapted to receive a tool not shown for inserting the screw-threaded element, and is typically a hexagonal socket of 3.5 millimetre size. However, since various sizes of screw-threaded element are known and used, dimensions of the blanking plug 10 can be modified accordingly.
The blanking plug 10, which is formed from a non-toxic bio-compatible, typically plastics, material, such as polypropylene, has a stem portion 12 which can be received in the through-bore of the screw-threaded element, and a cap portion 14 integrally formed with the stem portion 12 at one end thereof and sized to be able to
<Desc/Clms Page number 5>
cover and overlap the opening to the through-bore.
The blanking plug 10 is of generally circular transverse cross-section and can be push-fit inserted into the through-bore of the screw-threaded element. So that the blanking plug 10 does not become easily extracted from the through-bore of the screw-threaded element after insertion, the stem portion 12 is formed with three interference elements, being in this case resiliently flexible annular ribs 16. The annular ribs 16 are equi-distantly spaced apart along, and extend radially away from, the longitudinal axis of the stem portion 12 to create an interference fit between the stem portion 12 and the through-bore. To aid insertion and to further inhibit removal of the blanking plug 10, the annular ribs 16 are reverse directed towards the cap portion 14. The cap portion 14 extends beyond the peripheral edge of the annular ribs 16.
The blanking plug 10 also has a grippable portion 18 by which the plug 10 can be held. The grippable portion 18 is integrally formed with the cap portion 14 in such a manner that the stem portion 12, cap portion 14 and the grippable portion 18 are coaxial or substantially coaxial with each other. A frangible portion 20 is interposed between the grippable portion 18 and the cap portion 14 to promote removal of the grippable portion 18 once the blanking plug 10 has been suitably inserted into the through-bore of the screw-threaded element.
The grippable portion 18 is shaped to be securely and releasably engaged by a surgical gripping tool not shown. However, the grippable portion 18 may be in the
<Desc/Clms Page number 6>
form of a handle adapted to enable a user to directly grip and insert the blanking plug 10 into the through-bore.
In use, once a suitable size of surgical screw-threaded element has been selected along with the appropriate blanking plug 10, the screw-threaded element is positioned and inserted into the patient. In the case of ACL surgery utilising a patellar tendon graft, once the graft is in place and the femoral bone plug has been secured, the screw-threaded element is inserted between the tibial tunnel wall and its adjacent bone plug using the appropriate tool. The grippable portion 18 of the blanking plug 10 is then gripped by the jaws of the surgical gripping tool and the blanking plug 10 is positioned adjacent the through-bore. The stem portion 12 is then inserted into the socket of the through-bore until the cap portion 14 covers and overlaps the opening to the socket. The blanking plug 10 is thus engaged with the screw-threaded element and blocks the through-bore in a suitably fluid tight manner.
It should be realised that the blanking plug 10 could be screw-threadably insertable, in which case the stem portion 12 would include a screw-thread and part of the through-bore of the screw-threaded element would be formed with a mating screw-thread.
Furthermore, the blanking plug 10 is not limited to the use of interference elements which take the form of annular ribs 16, and may be any other suitable type of interference element.
<Desc/Clms Page number 7>
Although the blanking plug 10 has been described with regard to a screwthreaded element that is used in ACL surgery, the blanking plug 10 can be used to prevent or inhibit leakage through any type of surgical screw-threaded element having a through-bore.
Furthermore, the non-circular cannulated socket of the screw-threaded element could be replaced by a non-circular cannulated head (not shown) intended to be driven by a suitably sized socket held by a suitable tool, and the cap portion 14 of the blanking plug 10 could be modified to be receivable over all or part of the noncircular head. The cap portion 14 may thus be push fit engageable with the noncircular head, and may include one or more inwardly facing interference elements to create an interference fit between the cap portion 14 and the non-circular head. The stem portion 12 could be dispensed with.
With the screw-threaded fastening devices described above, it is possible to prevent leakage of internal fluid from one part of the body to another when using a surgical screw-threaded element having a through-bore. In particular, it is possible to prevent or inhibit synovitis/bursitis due to leakage of synovial fluid following ACL surgery using such screw-threaded elements in the tibia.
The embodiments described above are given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention.

Claims (20)

  1. CLAIMS 1. A surgical screw-threaded fastening device comprising a surgical screw-threaded element, which is externally threaded and has a through-bore, and a surgical biocompatible blanking plug which is engageable with the screw-threaded element to prevent or substantially prevent fluid leaking through the through-bore.
  2. 2. A surgical screw-threaded fastening device as claimed in claim 1, wherein the blanking plug has or is in the form of a cap portion which covers and overlaps the opening to the through-bore when engaged with the screw-threaded element.
  3. 3. A surgical screw-threaded fastening device as claimed in claim 2, wherein the blanking plug has a stem portion which can be received in the through-bore, the stem portion being integral with the cap portion.
  4. 4. A surgical screw-threaded fastening device as claimed in claim 3, wherein the screw-threaded element includes a non-circular tool-receiving socket formed in one end, the socket being coaxial with and part of the through-bore and the blanking plug being dimensioned to fit the socket.
  5. 5. A surgical screw-threaded fastening device as claimed in claim 4, wherein the noncircular socket is a hexagonal socket.
  6. 6. A surgical screw-threaded fastening device as claimed in claim 4 or claim 5,
    <Desc/Clms Page number 9>
    wherein the non-circular socket is of 3.5 millimetre size.
  7. 7. A surgical screw-threaded fastening device as claimed in any one of claims 3 to 6, wherein the blanking plug is push-fit insertable into the through-bore and the stem portion includes one or more radially-extending interference elements by which an interference fit can be achieved by the stem portion in the through-bore.
  8. 8. A surgical screw-threaded fastening device as claimed in claim 7, wherein the or each interference element is in the form of a resiliently flexible annular rib.
  9. 9. A surgical screw-threaded fastening device as claimed in claim 7 or claim 8, wherein the or each interference element is reverse directed towards the cap portion.
  10. 10. A surgical screw-threaded fastening device as claimed in any one of claims 7 to 9, wherein three of the interference elements are formed on the stem portion in equiaxially spaced relationship.
  11. 11. A surgical screw-threaded fastening device as claimed in any one of claims 7 to 10, wherein the cap portion extends beyond the peripheral edge of the or each interference element.
  12. 12. A surgical screw-threaded fastening device as claimed in any one of the preceding claims, wherein the blanking plug includes a grippable portion which is integrally formed with the cap portion and by which the plug can be held.
    <Desc/Clms Page number 10>
  13. 13. A surgical screw-threaded fastening device as claimed in claim 12, wherein the grippable portion is separable from the cap portion.
  14. 14. A surgical screw-threaded fastening device as claimed in claim 13, wherein a frangible portion is interposed between the grippable portion and the cap portion to promote the removal of the grippable portion from the cap portion.
  15. 15. A surgical screw-threaded fastening device as claimed in any one of claims 12 to 14 when claim 12 is dependent on claim 3, wherein the stem portion, cap portion and gripable portion are coaxial or substantially coaxial with each other.
  16. 16. A surgical screw-threaded fastening device as claimed in any one of claims 12 to 15, wherein the grippable portion is in the form of a handle adapted to enable a user to directly grip and insert the blanking plug into the through-bore.
  17. 17. A surgical screw-threaded fastening device substantially as hereinbefore described with reference to the accompanying drawing.
  18. 18. A surgical gripping tool in combination with a surgical screw-threaded fastening device as claimed in any one of claims 12 to 15, wherein the surgical tool is adapted to be securely and releasably engagable with the grippable portion of the blanking plug.
  19. 19. A method of preventing or substantially preventing leakage of fluid when using a
    <Desc/Clms Page number 11>
    surgical screw having a through-bore, the method comprising the steps of : a) selecting a surgical screw-threaded fastening device in accordance with any one of the preceding claims, b) inserting the surgical screw-threaded element into the patient, and I c) engaging the blanking plug to block the through-bore of the screwthreaded element.
  20. 20. A method of preventing or inhibiting synovitis/bursitis following the use of a surgical screw having a through-bore during anterior cruciate ligament surgery, the method comprising the steps of : a) selecting a surgical screw-threaded fastening device in accordance with any one of claims 1 to 18, b) inserting the surgical screw-threaded element into the tibia of the patient to fix a bone plug in place, and c) engaging the blanking plug to block the through-bore of the screwthreaded element to prevent or substantially prevent passing of synovial fluid therethrough.
GB0124072A 2001-10-06 2001-10-06 Improvements in or relating to a surgical screw-threaded fastening device Expired - Fee Related GB2380678B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0124072A GB2380678B (en) 2001-10-06 2001-10-06 Improvements in or relating to a surgical screw-threaded fastening device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0124072A GB2380678B (en) 2001-10-06 2001-10-06 Improvements in or relating to a surgical screw-threaded fastening device

Publications (3)

Publication Number Publication Date
GB0124072D0 GB0124072D0 (en) 2001-11-28
GB2380678A true GB2380678A (en) 2003-04-16
GB2380678B GB2380678B (en) 2004-08-11

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GB0124072A Expired - Fee Related GB2380678B (en) 2001-10-06 2001-10-06 Improvements in or relating to a surgical screw-threaded fastening device

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010041934A1 (en) * 1992-06-23 2001-11-15 Sun Medical Technology Research Corporation; Nok Corporation; Seiko Epson Corporation Auxiliary artificial heart of an embedded type

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010041934A1 (en) * 1992-06-23 2001-11-15 Sun Medical Technology Research Corporation; Nok Corporation; Seiko Epson Corporation Auxiliary artificial heart of an embedded type

Also Published As

Publication number Publication date
GB0124072D0 (en) 2001-11-28
GB2380678B (en) 2004-08-11

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COOA Change in applicant's name or ownership of the application
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20051006