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Difference between revisions of "Introduction"

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(How to use OrthoLoad?)
(File Name Select a video by implant type and activity)
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====File Name Select a video by implant type and activity====
 
[[File:FileName.png|thumb|right|File Name|180px]]
 
 
In the top left frame of the DATABASE, you can choose an implant type, an activity, possibly an additional parameter, a patient and a trial. Then a '''OrthoLoad''' video will be shown on the right side.
 
 
=====Select a video by file name=====
 
[[File:SelectVideo.png|thumb|right|Select Video|180px]]
 
 
In the left bottom frame of the DATABASE, you type a file name. Then a '''OrthoLoad''' video will be shown on the right side. For example, if the complete name of the '''OrthoLoad''' video is s1r_211005_1_80_screen.mp4, then type in only s1r_211005_1_80. This is the basic trial number.
 
 
=====Show or download videos=====
 
Using the buttons, you can either directly play the video or download it. If you just play the video in a browser, your browser will play the video with Flash Plug-in. If you download and play the video on your computer, your PC will play the video with your standard video player. We clearly favour the Media Player Classic or VLC Player for a Windows and VLC Player for Mac OS X and Linux
 
 
 
====Download Screenshot====
 
====Download Screenshot====
 
[[File:DownloadScreenshot big.png|thumb|right|Download Screenshot|180px]]
 
[[File:DownloadScreenshot big.png|thumb|right|Download Screenshot|180px]]

Revision as of 14:48, 6 October 2014


What is OrthoLoad?


OrthoLoad is a public database containing the loads acting in orthopaedic implants. They were measured in vivo using instrumented implants with telemetric data transmission. Currently load data are available for the

Hip joint, shoulder joint, knee joint, vertebral body replacement and internal spinal fixator.

Data is presented as videos, containing the time-dependent forces and moments, force vectors, video images of the patients activity and numerical data. Many results involving the 'Hip Joint' are already available in the database. More data are continuously added from the actual 'Hip Joint III' where also the three moments were measured.  From hip and knee implants, only selected examples are available because access to this data must be detained until it has been published in scientific journals.

From the OrthoLoad database you can select an implant, an activity with parameters, a patient and one or several trials. The time course of the loads is shown in videos (encoded in the wmv- or mp4-format) and can be analyzed in more detail by displaying single video frames. Numerical data files (text files, suffix .akf) can additionally be downloaded and the forces and moments then be used in finite element studies or joint simulators, for example.

It's recomended to run OrthoLoad on a Windows PCs with Media Player Classic, VLC Player or FairPlay Lite player or on Linux/Mac OS X with VLC Player!

How to use OrthoLoad?


Enter DATABASE and in the top left frame 'Joint Loads' you can choose an 'Implant' type, an 'Activity', possibly an additional 'Parameter', a 'Patient' and a trial by 'File Name'. Then an OrthoLoad video will be shown on the right frame 'Now Selected'.

Alternatively you may select a trial directly by typing its basic trial number into the upper right frame 'Select Video by File Name'. The basic trial number is the first part of the file name e.g. 's1r_211005_1_80' of the file 's1r_211005_1_80_screen.mp4'  

(s1r = shoulder patient #1 with implant right side,  _211005 = date: October 21st 2005,  _1_80 = internal trial number  _screen = video file,  _fmax = png-image)

Use the buttons in the top left frame 'Joint Loads' to play, show or download videos, data or pictures. You may just play the video in your browser with Flash Plug-in. Or you download and play the video on your computer with your standard video player. We clearly favour the 'Media Player Classic' or 'VLC Player' for MS Windo

What see orthoload

ws and 'VLC Player' for Mac OS X and Linux. Videos are encoded in the wmv or mp4(H.264) format.

The vertical marker line inside the force diagram shows the actual measuring time. All other data is displayed synchronously to this time

(patient video, vectors, tables ...).

The 'Hip Joint' was instrumented with a 4-channel telemetry transmitter and only the forces were measured,  no moment diagram is shown. All other implants measure forces and moments with measuring units %BW and %BW*m. Using the patients' body weight (BW), the values in N and Nm can be recalculated.

Select, show & download OrthoLoad videos


Download Screenshot

Download Screenshot

The screenshot shows all data for the instant of maximum resultant force. You can download using the button on the left side. The name of the screenshot contains the trial name. A picture of the trial S1R_211005_1_80 for example will be S1R_211005_1_8_fmax.png.

Download data file

You select a video (see above) and use the buttons 'Show' and 'Download' for 'Data' to open or download the data file *.akf belonging to the video *.wmv/*.mp4.

Download additional data file

Additional Data

You select a video (see above) and use the bottom left box 'Additional Data File' (if available) to open or download the data file (*.eof, *.cof etc.) belonging to the video *.wmv/*.mp4.

Measurements


Measurements

A coil for the inductive power supply is arranged around the implant and the antenna is placed close to it. The data received is at first controlled in regard to transmission errors and then led to a notebook where the forces and moments are calculated and displayed in real time. The images of the patients' exercises and the synchronous data stream are both recorded on the same video tape. On a monitor or using a video beamer, the forces and moments can be controlled immediately. This allows one to detect unexpected loading situations and immediately modify the way an exercise is performed.