Manual lock knees RESPONSES

Manual lock knees RESPONSES

Paul Meyer

12/6/2008

Huge Thanks to everyone who took time out to offer their opinions. When I originally posted, I was leaning toward the Medi knees but due to the patient gaining some weight recently, I will have to go with the Otto Bock design. I have included the responses below:

See:
<URL Redacted>
We have use this successfully in our facility.



The Otto Bock 3R32 is a manual locking polycentric knee designed for knee disarticulation.

Bock makes a sturdy 4-bar locking knee



Paul... I went back and reviewed the information Nick gave to me and the Medi knee you might be interested in is their OFM1/KFM1 Polycentric Mechanical Manual Lock Knee, which you will find at the following link:

<URL Redacted>

The only four bar locking knees that I know of are the ones that DAW carries, They have two versions: one that locks at full extension and one that allows 0-30 degrees of free flexion with a stop at 30 degrees. Both have a cable release to allow further flexion and sitting, with the ability to place the knee in the unlocked position with the cable handle.


The KFM1 is a constant-friction 4 bar knee-disarticulation unit with a manual lock option. The posterior manual lock lever can be engaged or disengaged by the practitioner depending upon the amputee's functional capability. If you choose to employ the lock, the amputee can operate it as usual with a lanyard/lever. The geometry of the knee is inherently quite stable, though it is not a true geometric locking knee (flexion can be initiated without loading the toe). The knee has a lamination dish with beveled discs that allow for alignment adjustments of 0-10 degrees and 5mm slide in any direction. If you nail the alignment in the lamination, you can remove the discs, which will raise your knee center to ¼ from bottom of dish (flush on outer distal end of socket) to the anterior proximal pivot point. For further details, see the following link: <URL Redacted>

You may want to consider the Medi OFM1 locking knee. The
manual lock feature can be turned on and off fairly easily.



Check out Medi's OFM2 knee. Can start out as a locked knee then progress to wt activated w/stance flxn as the pt progressess. Not a fan of locked knees either, but this one has been durable & has worked very well in situations that are ify early on.

I have had good success with the Medi OFM2 knee. Smooth, lightweight, and can be used as either a manual locking knee, or stance control, as condition dictates

Try the Medi 4bar knee with the manual lock system. I have used it with success.

DAW has a good one.

Try the medi knee ofm1sf. There is a manual lock with a lever that can later be locked in the open position, changing the system to a polycentric knee with friction swing adjustment, stance flexion and integrated extension assist. The assist is very strong and the alignment can be changed to be very secure. The built in pyramid has ap-ml adjustment (not much) and rotation built in. This has become our default low activity knee where additional stability and security are required with the potential to progress with a versatile knee

Dad and I have used Medi's knee that is four bar and manual locking. The nice thing is it goes back to standard polycentric with the turn of a screw. You can get it with stance flexion too, I think. I know you can get it with a basket for a longer limb, it is the lightest and cleanest one I have seen. I am ordering one for a guy pretty soon.


Streifeneder has a 3A21 that comes in a manual locking version

http://eurointl10.chainreactionweb.com/catalog/product_info.php?products_id=818&osCsid=4bac36a4f5bea21771f096f1a8f17acb



Paul, check out the OB 3R32 for KD or look at the knees from MediUSA. Many of them have an additional manual lock feature

Paul, Medi makes a weight-activated stance knee that can also be utilized as a manually locking knee. Good knee with low build height..Hope this helps



Thanks,



Paul Meyer, CPO

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