Guide AO/ASIF Instruments and Implants: A Technical Manual

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AO/ASIF Instruments and Implants
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  2. AO/ASIF Instruments and Implants
  3. AO/ASIF Instruments and Implants: A Technical Manual
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  5. AO/ASIF Instruments and Implants: A Technical Manual

It should be noted that the device as illustrated in the figures, including the embodiment of FIG. Generally, the length of slide channel should correspond to the desired extension of tongue , i. The reduction of the range of movement of the thumb slide would enhance the ability to perform the placement, extension and retraction of the tongue using only one hand to hold the instrument, freeing the other hand for manipulation of the tissue around the bone and for holding the end of the cerclage wire as the other end is guided around the bone.

A cross-section of the shaft of a long bone and the surrounding soft tissue is shown with incision In FIG. As illustrated, it can be seen that little spreading of the incision is required to position tip at starting point As tongue is extended it curls, causing distal end of tongue to follow the circumference of the bone Once fully extended, as in FIG. Assuring that the free end of wire remains accessible, shown here secured by forceps , plunger is pulled away from housing causing tongue to be retracted into housing , pulling with it the attached end of cerclage wire , as shown in FIG.

Most frequently terms

The natural curvature of tongue again causes its distal end to closely follow the circumference of the bone as it is retracted, with no intrusion into the surrounding tissue Once the tongue is fully retracted, the instrument is pulled away from the incision to permit access to both ends of the cerclage wire so that they can be twisted together.

During this procedure, no rotation of the wire passer is required to work the tip around the circumference of the bone, nor is there any need to change the tangential angle of the wire passer with respect to the bone, both of which motions are required for use of prior art wire passers. Therefore, apart from the incision to provide access to the bone and to the wire after it has been passed around the bone, no forces are applied which might increase trauma to the surrounding tissue It will be apparent to those skilled in the art that various modifications and variations can be made in the device and method of the present invention without departing from the spirit or scope of the invention.

Thus, it is intended that the present invention cover the modification and variations of this invention provided they come within the scope of the appended claims and their equivalence. Year of fee payment : 4. Effective date : The cerclage instrument comprises a hollow housing having a handgrip at its proximal end for gripping in the user's hand to support and control movement of the device.

Disposed slidably within the housing is an extendable tongue formed from spring metal or similar material that will coil or curl to form a loop when extended outside of the housing. At its distal end, the tongue has an eyelet or notch for retaining the end of a cerclage wire so that it can be pulled around the bone.

At its proximal end, the tongue is attached to a plunger or slide within the housing which permits the tongue to be extended from and retracted into the housing.

AO/ASIF Instruments and Implants

The curvature of the tongue when extended causes it to closely follow the circumference of the bone during extension and retraction. Field of the Invention The present invention relates to an instrument for passing cerclage wire around a bone for fixation of a fracture and more particularly to a cerclage instrument having a flexible means for closely following the circumference of the bone to minimize soft tissue trauma.

Description of Related Art Numerous tools and techniques are used by orthopedic surgeons for internal fixation of bone fractures, including placement of plates, screws, pins, nails and wires. We claim: 1.


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A wire passer for placement of a cerclage wire for internal fixation of a bone, the wire passer comprising: a housing having a proximal portion and a distal portion, with a handle means at the proximal portion of the housing and a tip at an end of the distal portion of the housing, the housing being substantially hollow and having a tip opening in the tip;.

A wire passer as in claim 1, wherein the slide means is a plunger. A wire passer as in claim 1, wherein the tongue is formed from a strip of flat spring metal. A wire passer as in claim 1, wherein the tongue is formed from a pre-coiled steel cable.

A wire passer as in claim 1, wherein the housing comprises two halves which are openable to permit access to the proximal end of the tongue and the slide means. A wire passer as in claim 1, wherein the housing and the slide means are each formed from stainless steel of a type suitable for surgical instruments.

A wire passer as in claim 1, wherein the tongue is formed from stainless steel. A wire passer as in claim 1, wherein the distal portion of the housing has a channel formed therein for retaining the tongue in a substantially flattened condition when the tongue is retracted within the housing. A wire passer as in claim 1, wherein the tongue is removably attached to the slide means.

A wire passer as in claim 1, wherein the slide means is a thumb slide extending through a slide channel within the housing. A cerclage instrument for positioning a cerclage wire for fixation of a fracture in a bone, the cerclage instrument comprising: a housing having a handle portion and an extension portion, the handle portion having a hollow portion therein and the extension having a hollow channel therein in communication with the hollow portion, and having a tip end with a tip opening in communication with the hollow channel;.

AO/ASIF Instruments and Implants: A Technical Manual

A cerclage instrument as in claim 11, wherein the slide means is a plunger. A cerclage instrument as in claim 11, wherein the slide means is a thumb slide extending through a slide channel within the housing. A cerclage instrument as in claim 11, wherein the housing comprises two halves which are openable to permit access to the proximal end of the tongue and the slide means. A cerclage instrument as in claim 11, wherein the housing and the slide means are each formed from stainless steel of a type suitable for surgical instruments. A cerclage instrument as in claim 11, wherein the tongue is formed from spring metal.

A cerclage instrument as in claim 11, wherein the tongue is formed from pre-coiled steel cable. A method for passing cerclage wire around a bone for internal fixation of a bone fracture, the method comprising: providing a cerclage instrument having a hollow housing with a tapered tip having a tip opening, and a slide means attached to an extendable tongue formed from a generally flattened strip of resilient material which curls to form a circle when unloaded and having an eyelet near a tongue end for receiving an end of the cerclage wire, the slide means and tongue moving slidably within the hollow housing to extend and retract the tongue through the tip opening;.

The method of claim 18, wherein the step of providing a cerclage instrument includes forming the hollow housing and slide means from stainless steel of a type suitable for surgical instruments. The method of claim 18, wherein the step of providing a cerciage instrument includes forming the tongue from a pre-coiled steel cable. USA en. USB2 en. USB1 en. Device for passing cables around bone-like framework, has movable case telescopically provided on fixed case and has curved end with cable passing adapter. Fracture fixation by cerclage utilizing cortical bone tack and pull-out tension device.

Instrument for positioning a cerclage fixation device around fractured bone parts. Baumgart, J. Buchanan, J. Disegi, R.

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Hertel, A. Murphy, S.

This valuable compilation of practical advice on the management of abdominal injuries is recommended to trainees sitting postgraduate examinations and to all general surgeons who treat patients with abdominal trauma. Within the last 30 years the scientific and technological advances have improved the outcome in musculoskeletal injuries.

AO/ASIF Instruments and Implants: A Technical Manual

The most notable advances pertinent to fractures were introduced by the Arbeitsgemeinschaft fur osteosynthesefragen A0 group. The second edition of this excellent book has come out. The text has been meticulously organised and many additions of new instruments, implants and operation techniques almost double the length of the manual. The techniques used in the A0 system have been well described. Since the aim of modem fracture surgery is to decrease significantly the disability and disfigurement, all fracture surgeons must understand these techniques and also train operating room staff so that the best outcome in each case can be achieved.


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  • Ao/Asif Instruments and Implants: A Technical Manual.
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The editors have compiled an excellent manual of A0 techniques and the quality of illustrations is first class. This manual is a must in all trauma theatres. All professionals involved in the surgical management of fracture victims regardless of their level of training or practice must read and, I emphasize, understand the techniques described in this manual.

Readers who liked and used the first edition will love and wear out this edition. DM Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Would you like to tell us about a lower price? If you are a seller for this product, would you like to suggest updates through seller support?

One important feature of the first edition was a detailed checklist of the instruments required for the more common operative procedures for treating fractures. Not surprisingly, the manual was very popular.

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