Gamma One Shot Device

8/19/2019 Gamma One Shot Device

1/6

GAMMA® LOCKING NAIL INSTRUMENTS

OPERATIVE TECHNIQUE


2/6

FEATURES AND BENEFITS

The One Shot™ Device is a new component of the Gamma® Locking Nail

instrumentation system determining the correct position of the Gamma® lag

screw. It can be used to place a K-wire very easily and exactly in a desired

location within the femoral head by attaching it onto the lag screw target sleeve.

Without the One Shot™ Device, the final placement of the lag screw can be

determined only after the lateral cortex is opened and the K-wire is inserted.

In cases were the K-wire is inserted too proximal, correct placement of the lag

screw is often difficult. By penetrating the cortex slightly more distally the tip of

the awl automatically slipped into the first opening.

In order to ensure good lag screw and thus Gamma® Locking Nail positioning it

is crucial to correctly position the K-wire. Using the One Shot™ Device duringsurgery this step can be performed exactly, with one drilling only.

The goals of the One Shot™ Device are to:

determine correct K-wire, lag screw and Gamma® Locking Nail placement

decrease OR time

decrease X-ray exposure

The One Shot™ Device is made of carbon fibre and works by providing a target

that indicates the potential position of the K-wire on the fluoroscope screen.

The target consists of three wires – a dashed inner wire and two solid outer

wires. These wires work like a gun sight to indicate the potential posi-

tion of the K-wire. The One Shot™ Device is attached by slight-

ly pressing the grip and releasing it when positioned

onto the lag screw sleeve. If the device is moved

on the sleeve the grip always has to be

pressed slightly.

Metal indicators

Instructions

Attachment grip


3/6

OPERATING TECHNIQUE

The use of the One Shot™ Device should not interfere with

or replace any steps in the Gamma® Locking Nail Op-techni-

que. To use the device, follow the Gamma® Locking Nail tech-

nique until the lag screw target sleeve has been

inserted (Fig. 1).

Note:

The tip of the K-wire must be placed in the inferior half of

the femoral head in the frontal plane, and on the midline in the

lateral plane. The objective is to place the lag screw below the

centre of the femoral head on the A/P view and centrally

on the lateral view.

Pressing the attachment grip slightly the device is positioned between the

anterior aspect of the patient’s hip and the fluoroscope screen (Fig. 2 + Fig. 3).

It is important to drape the patient such that the One Shot™ Device does not

interfere with any drapes anterior to the patient’s hip.

If positioned correctly, the target will appear in the

fluoroscopic image. If it does not, the fluoroscope screen canbe repositioned or the One Shot™ Device can be moved

towards or away from the patient by pressing the grip slightly

until the target is within the view of the fluoroscope.

Fig. 2

Fig. 3

Fig. 1


4/6

OPERATING TECHNIQUE

Once the target is correctly aligned, the Gamma® Locking Nail can be moved

superiorly or inferiorly until the dashed wire appears in the desired location for

the K-wire within the femoral head (Fig. 4).

To predict the location of the K-wire accurately, the dashed wire of the target must

appear between the two solid wires at the desired position. If it does not, the

device must be rotated about the lag screw sleeve until the dashed wire is in the

centre (Fig. 5). If the position is incorrect the Gamma® Locking Nail must be either

pulled backwards (Fig. 6) or pushed forward (Fig. 7).

Fig. 4

Fig. 5Fig. 6 Fig. 7

The K-wire can then either be placed into the femur or the targeting arm is held

in place until the K-wire’s position in the lateral view has been determined.

Rotate the device to the Adjust the lateral view (Fig. 9). Position the fluoroscope

lateral view by pressing The device must not have the screen to 45°, 50° of the

the grip slightly (Fig. 8). same plane like the Target Device. femoral axis (Fig. 10).

Fig. 8

Fig. 9

Fig. 10


5/6

Check alignment by means of image

intensifier (Fig. 11).

Fig. 11

Fig. 12 Fig. 13 Fig. 14

OPERATING TECHNIQUE

One Shot™ Device

Catalogue number 1213-3010

Acknowledgements:

The One Shot™ Device was designed with the contribution of:

Dr. Asche, Freudenstadt/Germany

Dr. Tokunaga, Fukuoka/Japan

If the dashed wire of the target appears between

the two solid wires insert the K-wire andfollow the Gamma® Locking Nail Op-technique

(Fig. 12). If it does not, the device must be rota-

ted up (Fig. 13) or down (Fig. 14).

© 2000 Stryker® Corporation. All rights reserved. Printed in Germany.Stryker® and Gamma® logos are registered trademarks of the Stryker® Corporation.

To ensure the best quality of its products and their improvementsStryker® reserves the right to modify all or part of their products.

Caution: Federal law (U.S.A.) restricts this deviceto sale by or on the order of a licensed physician.


6/6

Stryker® Trauma GmbH

Prof.-Küntscher-Straße 1–5D-24232 SchönkirchenGermany

[email protected]

REF NO: B0300001

© 2000 Stryker® Corporation. All rights reserved.

The Trochanteric Gamma® Locking Nail and the original Long Gam-

ma® Locking Nail are made of Orthinox® and have been designed bysurgeons. Combining the strength and biomechanical advantages of the existing Gamma® family they are the Golden standard for proxi-mal femoral fractures with more than 500.000 treatments worldwide.

I.C.NAILThe IC-Nail system is the realization of superior biomechanicalintramedullary stabilization using small caliber, high tensile strengthimplants for internal fixation of long bones. Femoral and tibialimplants offers three types of locking including active controlledintersegmentary compression in cases that are axially stable.

More than 1.000.000 Grosse & Kempf locking nails have beenimplanted since its introduction in 1974. A development of theoriginal intramedullary principles presented by Prof. GerhardKüntscher, the femoral and tibial system provides the establishedadvantages of closed operating technique and undisturbed callusformation using a sophisticated instrument system.

For retrograde femoral nailing the Supracondylar Nail is the specia-lised implant. It is made of Orthinox® and features a superior bio-mechanical stability. Unique to the short SCN is the locking of allscrews via the target device. The design of the condyle screws allowfor interfragmentary compression.

METAIZEAUSince more than 10 years children from all over the world havebeen treated successfully using the Metaizeau paediatric nailingsystem. The main advantages of the system are: Simple and fasttechnique, closed reduction discharge from hospital at day 4–6and minimal disturbance of bone growth. The nail can be adap-ted to the patient and guarantees a best fit for every case.

I.M. SAW The I.M. Saw is suitable for closed osteotomies of the femur andtibia in all cases which allow the use of intramedullary nails forfragment fixation. Closed osteotomies with subsequent fragmentfixation are indicated for correction of rotational deformities,

angular deformities along the axis and lengthening and shorteningprocedures.

MANUFACTURER:

Documents

Gamma One Shot Device