Transtibial Prosthetic System
1. What materials are incorporated into the iFIT prosthesis for strength and durability?
The iFIT transtibial and transfemoral prosthetics are made of ultra-high strength polymers with unique material properties that combine to form a strong, durable, and flexible socket that can be easily adjusted. The are fit and custom-modified to each patient. The iFIT prosthetic systems have surpassed ISO testing standards.
2. Can I use with your device with vacuum system for suspension?
No, vacuum or suction sockets are not available. The TT200 and TT Advanced Closure System use a shuttle lock and pin.
3. Does the iFIT transtibial prosthesis kit come with everything I need to fit it to a patient straight from the box?
The only items you will need to purchase are a silicone locking liner and foot. There is no need for casting and molding. Purchase of an iFIT system includes the socket, inner neoprene liner, padding kit, pylon, pylon clamp and pins. Extra cables or cord depend on which type of socket system is being used. We recommend using 3mm liner since there is ample padding in the prosthesis.
4. how do i get an ifit prosthesis?
You must be fit by a prosthetist that is registered and certified by iFIT prosthetics. Prosthetists can get certified through our website by visiting "certification resources" or contacting Josh Mullins (301) 821-5414 for more information.
5. Is the Transtibial prosthesis distal end weight bearing or patellar tendon bearing?
The iFIT prosthesis is designed to give total contact within the socket, so that pressure is distributed evenly around the limb. The force is spread out over a larger area, as opposed to one concentrated area below the patella seen in patellar tendon bearing hard sockets. If an amputee feels too much pressure on their distal end, this can be addressed by one or more strategies; i) either adjusting the alignment and putting more flexion into the socket, ii) using the custom fit foam liner that precisely fits the limb geometry and insures total contact, or iii) adding foam under the medial tibial flare and adjusting the lower buckle to make it slightly tighter to hold the limb off of the distal end. If none of these strategies work, our iFIT custom foam liner can provide the best total contact and usually alleviate the patient’s sensation of “bottoming out” in the socket.
6. Can the device be heat molded?
For both the TT200 and the TT Advanced Closure System, you may heat and remold only two places on the socket, the; i) upper posterior portion of the prosthesis, where it grasps the thigh, and ii) the posterior proximal inner flap to reduce pressure in the popliteal fossa area. These two areas can be heated and pushed slightly out to relieve pressure in these areas. Do not heat any other areas of the prosthesis as this can result in structural failures.
In order to relieve these two pressure areas by heat molding, first use a standard heat gun to heat the material until it is very warm, do not melt it. Then put in the position you would like using a gripping device or device to push the socket outward. Let the socket cool slowly and naturally while held in the position you wish.
Refer to the instruction manual (Section V. Other Modifications) for guidance on heating.
In order to relieve these two pressure areas by heat molding, first use a standard heat gun to heat the material until it is very warm, do not melt it. Then put in the position you would like using a gripping device or device to push the socket outward. Let the socket cool slowly and naturally while held in the position you wish.
Refer to the instruction manual (Section V. Other Modifications) for guidance on heating.
7. What is the shortest and longest limb length the device can fit?
The TT 200 device will fit patients with limbs ranging from 14cm to 20 cm (standard, wide, and x-wide) and 21-26cm (tall), as measured from the base of the patella to distal end of limb. 1cm and 2 cm spacers can be used to accommodate limbs on the shorter end of the scale (14 cm being the shortest limb measurement). Alternatively, the prosthesis can be trimmed down 1-2 cm.
The iFIT Advanced Closure System comes pre-cut in three different lengths. Please refer to the sizing guide for more details.
For both systems, the patella should fall at approximately the proximal anterior socket or a little more inside the socket. This ensures that persons with shorter limbs have a firm purchase of the socket above the femoral condyles.
The iFIT Advanced Closure System comes pre-cut in three different lengths. Please refer to the sizing guide for more details.
For both systems, the patella should fall at approximately the proximal anterior socket or a little more inside the socket. This ensures that persons with shorter limbs have a firm purchase of the socket above the femoral condyles.
8. What residual limb circumferences will the device fit?
The iFIT Advanced Closure System will accommodate limb circumferences up to 36 cm while wearing liner. The iFIT TT200 system can accommodate circumferences up to 62cm while wearing liner. Please refer to the sizing guide for more details.
9. Are there different sizes of sockets?
The iFIT TT200 liner and the Advanced Closure System have a number of different sizes. The TT200 system is recommended for larger limbs. Speak with your sales representative prior to purchase to determine the correct size.
10. Can the wide TT 200 socket be modified if the patient shrinks?
Yes, there are several adjustments you can make to decrease the size of the wide socket.The first is cutting the back flap extender.You may also take out one or both of the lower side spacers to reduce the bottom circumference of the wide device. Lastly, you can add padding and switch to smaller cables.
11. What is the maximum weight the device can support?
The maximum weight for the adult sockets is 260 pounds. The X-wide and custom devices can accommodate 350 pounds.
12. What is the weight of the device?
The TT200 weighs 2.9 pounds or 1.3 kg. This includes the socket, locks and inner neoprene liner.
13. When can the amputee take their device home?
An amputee can take their device home immediately after being fit. This is provided they can demonstrate safe use of the device; i) negotiating stairs safely, ii) putting it on and taking it off properly, and iii) demonstrating the hand function, vision, and judgement to safely use the iFIT prosthesis.
14. Can I use an offset pyramid?
The TT200 model features the ability to change the pyramid adapter. You may switch to an offset pyramid or an offset plate to accommodate persons alignment needs for a stable prosthetic gait. An offset pyramid to the front may also be used to take pressure off the distal anterior tibia. You can remove the screws on the bottom holding on the standard pyramid and replace the standard pyramid with the offset plate or pyramid. Be sure to re-Loctite the screws when replacing the pyramid with an offset pyramid.
For the TT Advanced Closure System we recommend using an offset pylon instead of changing the pyramid to maintain the strength of the socket.
For the TT Advanced Closure System we recommend using an offset pylon instead of changing the pyramid to maintain the strength of the socket.
15. what tools do i need?
You will need a pipe cutter to cut the pylon, a file or deburring tool for once the pylon is cut, a 4 mm Allen wrench, torque wrench and Loctite. Scissors, a utility knife, cutting tools, screwdriver, extra Velcro and a heat gun are also helpful to have on hand if needed to adjust the inner liner and padding or the outer socket where heat molding is allowed.
16. Is it waterproof?
Provided you have a foot that works in the water, and knee if using the TF system, you can use the iFIT in the water. Water will not harm the socket or neoprene liner.
Transfemoral Prosthetic System
1. what type of design is this socket?
The iFIT transfemoral socket is ischial containment that can be modified to sub-ischial for maximum comfort.
2. What does the transfemoral system come with?
The transfemoral system comes with an adjustable socket, modifiable inner liner, and a customized rotating offset with female pyramid receiver.
3. what is left for me to purchase?
You will need to purchase a knee, foot, pylon and tube clamp for the patient.
4. Can the socket be modified?
The socket inner liner is generally modified for almost every patient. The inner liner and nylon flap can be trimmed according to the patient, then smoothed. It can also be heat flared if needed. For longer limbs, there may be no need for modification. We have found the length of the socket provides enough purchase on the limb for adequate gait stability.
5. how do you decrease rotation in the socket?
Each socket comes with two anti-rotation pads in the inner liner. We also suggest that persons buckle the prosthesis tightly so that it is secure. This will prevent rotation during gait.
6. is the socket waterproof?
The socket can be used in the water provided a waterproof knee and foot are used.
7. Can i change out the offset on the prosthesis?
Yes, the offset can be removed and replaced with another offset. Some prosthetists find the persons with longer limbs may need an offset that keeps the knee joint center higher.
8. What is the weight limit of the standard and wide?
The weight limit for both sockets is 275 pounds.
9. can conical limbs fit in this system?
Yes, we recommend using a foam insert or padding in between the lateral upright and inner liner to accommodate conical limbs. Refer to the instruction guide for pictures.
10. Can i change the angle of the offset to increase or decrease flexion?
The offset itself has 5 degrees of flexion. It comes with an optional 2 degree wedge that can be added to increase or decrease flexion to 2 or 7 degrees.
11. what limb length and circumferences will this fit
The iFIT sockets can fit 30 - 60 cm circumference distally - please refer to instruction guide to pick the correct socket size. It can fit limb lengths 17 cm and up from adductor tubercle to end. There is currently no limit in length.
