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Thread: Dialing in chair fit- Frame length and angle

  1. #11
    Senior Member Oddity's Avatar
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    Stimulite makes a full line of cushions. They make flat ones as well. And thin ones. Classic and Sport are both flat. XS refers to the top layer. It's softer, and more 'therapeutic' for sensitive skin, than the normal top layer.
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  2. #12
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    Although our body types are way different (I'm 6'-2 with a T6 SCI) this is an example of an extended frame depth (1.5" I think). This gives me plenty of room to grab the frame in front of my cushion. The front frame angle is 85 degrees. The closer this is to 90 degrees the more you can extend the frame depth and keep the footplate in the same place.

    There is about 2.5" between the back of my legs and my cushion which allows me to tuck my legs further underneath about even with my knees (I prefer this to minimize the square footage of my chair, as well as keep my feet from sticking off the front of the footplate and smashing my toes into things). I agree with Lynnifer that your cushion looks too long and shouldn't be touching your legs. If you don't want to tuck your feet underneath you'll need to extend the frame depth to get your footplate further forward for a longer occupied frame length like Oddity mentioned. I would not suggest a 25" wheel due to your height, it's going to take more effort to push.

    Like I mentioned in another thread of yours, you need to set your rear seat to floor height so that you're sitting as low as you can without having to raise your shoulders to push. This will be the most efficient setup with the least amount of effort. Most of the time that puts the tip of your fingers about at your axle if you hang your arms straight down. Once you have the rear seat to floor height set, I usually adjust the dump so that my lap is fairly flat (maybe slightly tilted toward me) so that I can carry things without them sliding around too much. For me its around 2", but my legs are really long. More dump doesn't give me more balance since I have no trunk control. Lastly, I think the angle and height of your backrest is what is making you feel like you're falling forward, but you can either lower it or tilt it back to fix that.

    Last edited by Brad09; 08-30-2018 at 11:58 AM.

  3. #13
    How do cushions work with ergonomic seats? Do they just bend? I'm super curious how one feels. Not sure if Ki does that, though. I LOVE the frame above, how much there is to grip. Is that an 85 degree angle front, too? My cushion actually (the roho) feels fine behind my knees, they don't tuck any more naturally, because of my range of motion. They definitely need to be higher up. My lap slants downward, so that's why I probably feel like I'm falling. If I raise the footplates up even more, the Freewheel still won't fit, cuz then my floor to footrest height is significantly higher. I guess I gotta decide whether to be shorter, or not use the wheel. I think it's going to be super hard for them to have the footplates high enough.
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  4. #14
    Here I put some foam under the front of the cushion to simulate an inch more of dump, or maybe half inch when squished. My feet on a tug to raise them where I feel comfortable. That's really short. Like 9" My knees hit my desk, so maybe I could come down an inch all around, or get a slimmer cushion. The wheels feel perfect here.
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  5. #15
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    Quote Originally Posted by heartdog View Post
    How do cushions work with ergonomic seats? Do they just bend? I'm super curious how one feels. Not sure if Ki does that, though. I LOVE the frame above, how much there is to grip. Is that an 85 degree angle front, too? My cushion actually (the roho) feels fine behind my knees, they don't tuck any more naturally, because of my range of motion. They definitely need to be higher up. My lap slants downward, so that's why I probably feel like I'm falling. If I raise the footplates up even more, the Freewheel still won't fit, cuz then my floor to footrest height is significantly higher. I guess I gotta decide whether to be shorter, or not use the wheel. I think it's going to be super hard for them to have the footplates high enough.
    The cushion bends with the ergo frame, I use a Ride Java cushion. I can't feel a difference with the ergo frame, but they are supposed to help keep your hips in a more neutral position. That is an 85 degree front frame angle. I'm not sure how the rear seat to floor height differs from your ZR to the Ki, but it needs to be a few inches lower so that the tip of your fingers are down around your axle. That would increase your dump and flatten out your legs on top, which would keep you from feeling like you're sliding off the front. Even if your legs can't bend back any further, its probably better on your Ki to decrease your cushion length so it doesn't rub on your legs. I don't think there is any way you're going to get a freewheel to work with the height you need your footplate at. You will probably have to set the regular footplate down low (2-3" off the ground) for the freewheel to attach, and then use a separate footplate for your feet that is spaced off the lower one. Just make sure the spacer is not coming up from the center of the footplate so there is room for the freewheel to clamp in the center.

  6. #16
    Well, a "make it right" policy doesn't extend to making the frame again, when it was what was ordered. I'm stuck with the chair. Damn. It's 14.5 inches off the ground! I'm used to 18!! I had NO idea she asked for 14.5. I thought it was 15.5 as opposed to being told mine was 17" in back. Doesn't sound like a lot, but it is. They're trying to rectify it and make it work by ordering parts to make up for it. I'm so pissed and bummed.
    Last edited by heartdog; 09-01-2018 at 12:16 AM.

  7. #17
    Senior Member lynnifer's Avatar
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    Kinda figured that would happen after replacing the first one. I'm sorry that this has been such a struggle.

    Piggy backing on your question about ergo seating, is it possible to correct a pelvic tilt with an ergo framed seat? Not going to get any good or reliable answers from the people available to me locally. is Invacare the only chair to offer the ergo seating? Top End Crossfire?
    Roses are red. Tacos are enjoyable. Don't blame immigrants, because you're unemployable.

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  8. #18
    Yeah, hopefully they can go back to the first frame, and tweak it to work. At least it didn't look like a kid's chair. What can I do differently next time?? How can I know exactly what I need if every chair has some deficit and I can't figure it out? Should I have gone to an OT?

  9. #19
    Senior Member lynnifer's Avatar
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    Here in Ontario, Canada - one can't order a chair with an OT involved. Since I worked - it's not a covered cost. So $80-125/hr out of pocket for me.
    Roses are red. Tacos are enjoyable. Don't blame immigrants, because you're unemployable.

    T-11 Flaccid Paraplegic due to TM July 1985 @ age 12

  10. #20

    Physical therapist?

    Every time I get fitted for a new 'chair I have the DME and a physical therapist with me to make sure I am fitted right. It is also required by my insurance company a PT be present when being fitted before they even give the ok to have the 'chair ordered. Of all the 'chairs I had over the years I have had nothing like what I am seeing in this thread.

    I have seen so many 'chairs that people are sitting in and they are just oversized and improperly fitted. A fitted 'chair should fit like a fine pair Italian leather gloves. It should feel like the 'chair is molded specifically for your body. You should have correct posture and feel very comfortable in your 'chair.

    Talk to some of the other guys here at CareCure who are much more educated than I about getting a proper fit and what to do about your own individual situation.

    Ti.
    "We must overcome difficulties rather than being overcome by difficulties."

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