Ossur Unloader One Knee Brace With Ratchet

Ossur Unloader One Knee Brace With Ratchet

Brand/Manufacturer: OSSUR/ROYCE MEDICAL
  • FSA Approved

Ossur Unloader One Knee Brace incorporate the company's innovative three-point leverage system to lessen pressure on the knee's delicate bony surfaces. Its flexible shells and breathable liners promote comfort and assist decrease migration, which helps to assure compliance. Unloader Knee Brace is made of color-coded quick fit buckles that make applying and removing it easier.

Item # Desc Pkg Reward Price
B-240619712 Small, Left medial Each $18.10
B-240619713 Medium, Left medial Each $18.10
B-240619714 Large, Left medial Each $18.10
B-240619715 X-Large, Left medial Each $18.10
B-240519712 Small, Right medial Each $18.10
B-240519713 Medium, Right medial Each $18.10
B-240519714 Large, Right medial Each $18.10
B-240519715 X-Large, Right medial Each $18.10
B-240629712 Small, Left lateral Each $18.10
B-240629713 Medium, Left lateral Each $18.10
B-240629714 Large, Left lateral Each $18.10
B-240629715 X-Large, Left lateral Each $18.10
B-240529712 Small, Right lateral Each $18.10
B-240529713 Medium, Right lateral Each $18.10
B-240529714 Large, Right lateral Each $18.10
B-240529715 X-Large, Right lateral Each $18.10

Features of Ossur Unloader Knee Brace

Rediscover your sense of adventure
25% reported a reduction in use of pain medication*

Rediscover your sense of adventure
31% reported a reduction in use of OTC anti-inflammatories*

Rediscover your sense of adventure
35% reported a reduction in use of prescription anti-inflammatories*

  • Dual Dynamic Force System (DFS) straps provide unloading of the knee joint, which may result in pain reduction while being worn
  • Lightweight frame, perforated for flexibility and ventilation, with flexible, low profile upright hinge that contours to patient anatomy and allows use underneath clothing
  • Ossur Knee Brace for Arthritis has color-coded quick fit buckles enable easy application and removal
  • Flexible, low-profile upright contours to patient anatomy and allows use underneath clothing
  • Proprietary Sensil silicone liners are designed to reduce migration
  • Unloader One is easy to adjust in the field, to fit an individual‘s contour

When to use Ossur Unloader One Knee Brace With Ratchet ?

  • Mild to severe unicompartmental knee osteoarthritis
  • Degenerative meniscal tears
  • Other unicompartmental knee conditions that may benefit from unloading such as:
    • Articular cartilage defect repair
    • Avascular necrosis
    • Tibial plateau fracture
    • Bone marrow lesions (bone bruises)

What to buy with Ossur Knee Brace for Arthritis

How to use Ossur Unloader Knee Brace?

Ossur Unloader One Knee Brace
Ossur Unloader One Knee Brace
  1. Open Upper (A) and Lower (B) Buckles. Ask patient to sit down and extend leg while fitting the device. Ensure that the Upper (C) and Lower (D) SmartDosing Dials are set to the “0” position. Place the device on the patient’s leg with the Hinge (E) on the affected side of the knee. Ensure proper alignment of the device on the leg (Fig. 2).
    • Height positioning: Align the center of the Hinge slightly above the middle of the patella.
    • Side positioning: Center of the Hinge should be at midline of leg.
  2. Fasten the Buckle buttons to their color-matched Keyholes (F, G).
    • Place the blue Lower Buckle button into the blue Calf Shell Keyhole (F) above Buckle Stability Shelf (H) and use the palm of the hand to snap the Lower Buckle closed (Fig. 3). Adjust Calf Strap (I) to appropriate length by tensioning around the calf and folding into the Alligator Clip (J) so that it keeps the device securely and correctly positioned on leg.
    • Bend the patient’s knee to 80°. Place the yellow Upper Buckle button into the yellow Thigh Shell Keyhole (G) and use the palm of the hand to snap the Upper Buckle closed (Fig. 4). Adjust Thigh Strap (K) to appropriate length by tensioning around leg and folding into Alligator Clip.
  3. Adjust the length of the Dynamic Force System (DFS) Straps (L, M).
    • With the patient’s knee fully extended, adjust the Upper DFS Strap (L) length until it sits firmly against the leg, and then fold it into Alligator Clip. At this point, patient should not experience any tension or unloading.
    • Adjust the Lower DFS Strap (M) in the same way.
  4. Ask patient to bend knee with the foot flat on the floor. Turn Upper (5a) and then the Lower (5b) SmartDosing Dial clockwise until indicators are in the “5” position. Have the patient stand up and take a few steps to verify correct positioning of the device and tightness of the straps.
    • Determine optimal DFS Strap tension based on patient’s pain relief feedback.
    • If patient requires more or less tension with indicator at the “5” position, adjust the length of the DFS Straps accordingly.
    • Aim for final SmartDosing Dial setting at the “5” position since this will give patient the ability to adjust dosing during daily life activities.
  5. When final fit has been confirmed, trim the straps to the appropriate length starting with the Calf Strap so that device sits correctly on leg while trimming other straps.
    • Ensure that the Strap Pad (N) is not wrinkled and positioned where the DFS straps cross in the popliteal fossa (Fig. 6).
    • Trim back the straps sufficiently so that the alligator clips are positioned away from the popliteal area. This reduces the bulk behind the knee.
    • Keyhole locks may be inserted into Calf (O) and Thigh (P) Shell if desired to ensure straps cannot accidentally be disengaged from shells (Fig. 7).

How to adjust Ossur Unloader Knee Support Device?

Range of Motion (ROM) adjustment:
The device comes with a 0° extension stop installed and includes the following additional stop options:

  • Extension stops of 5°, 10°, 15°, and 30°.
  • Flexion stop of 90°.

Note: Optimal corrective forces are applied at full extension. If patient requires an extension stop change, make sure to readjust tension in DFS Straps if more unloading is required.

  1. Peel condyle pad from Hinge to reveal stop slots and retaining screw.
  2. Remove retaining screw.
  3. Remove installed stop out of slot.
  4. Insert desired extension and/or flexion stop.
  5. Secure with retaining screw and replace the condyle pad on Hinge.

Note: Do not overtighten the retaining screw

How to remove Unloader Knee Brace?

  1. Ask patient to sit down with the leg extended.
  2. Turn both SmartDosing Dials counterclockwise until the indicator is at the "0" position to release tension on the DFS Straps.
  3. Bend the patient’s knee to 90° and open both Lower and Upper Buckles.
  4. Pull the Buckle buttons out of Keyholes

How to clean and care for Unloader One Custom Knee Brace?

  • Washing the device with the soft goods detached allows for more thorough cleaning.
  • Hand-wash using mild detergent and rinse thoroughly.
  • Air dry


  • Do not machine-wash, tumble dry, iron, bleach, or wash with fabric softener.
  • Avoid contact with salt water or chlorinated water. In case of contact, rinse with fresh water and air dry.

Warnings and Cautions:

  • Regular healthcare professional supervision is recommended for patients with peripheral vascular disease, neuropathy, and sensitive skin.
  • Make sure the device fits properly to minimize the possibility of skin irritation. Increase usage time gradually as the skin adapts to the device. If redness appears, temporarily decrease the usage time until it has subsided.
  • If any pain or excessive pressure occurs with the use of the device, the patient should stop using the device and contact a healthcare professional.
  • Care should be taken not to overtighten the device.
  • Make sure the device fits properly to achieve effective pain relief

Unloader One Knee Brace With Ratchet Specifications

Size Calf circumference Left Medial Right medial Left lateral Right lateral
Small 12.2" – 14" (31 – 36 cm) B-240619712   B-240519712   B-240629712   B-240529712
Medium   14" – 16.75" (36 – 43 cm)  B-240619713 B-240519713 B-240629713 B-240529713
Large 16.75" – 20" (43 – 51 cm) B-240619714 B-240519714 B-240629714 B-240529714
X-Large 20" – 24" (51 – 61 cm) B-240619715 B-240519715 B-240629715 B-240529715


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