Z-1790-2024Class II

RKNXC0005, RHEO KNEE XC 5 YR WARRANTY, MD, CE, External lower limb prosthetic component

Name: Z-1790-2024 RKNXC0005, RHEO KNEE XC 5 YR WARRANTY, MD, CE, External lower limb prosthetic component
Creator: Ossur H / F
Published: 2024-03-25
License: https://open.fda.gov/license/

Ossur Iceland ehf. / initiated 2024-03-25 / Open, Classified / root cause: software

FDA source

Ossur H / F began a recall of RKNXC0005, RHEO KNEE XC 5 YR WARRANTY, MD, CE, External lower limb prosthetic component on 2024-03-25. FDA classified it as Class II and gives the reason as "Due to firmware issues with the prosthetic knee, there is the potential for unintended warnings and device shutdown which could result in patient falls". As of 2026-09-10, the recall status on record is Open, Classified, and MDM tags the root cause as software.

Recall record

Recall number: Z-1790-2024
Classification: Class II
Status: Open, Classified
Initiated: 2024-03-25
Posted: 2024-05-10
Recalling firm: Ossur Iceland ehf.
Product: RKNXC0005, RHEO KNEE XC 5 YR WARRANTY, MD, CE, External lower limb prosthetic component
Product code: ISW Assembly, Knee/Shank/Ankle/Foot, External
Reason for recall: Due to firmware issues with the prosthetic knee, there is the potential for unintended warnings and device shutdown which could result in patient falls.
Root cause tag: software
FDA root cause: Software design
Action: On April 4, 2024, Ossur, issued a Urgent Medical Device Correction via E-Mail to affected consignees. Ossur asked consignees to take the following actions: REMOTELY UPDATE FIRMWARE ON AFFECTED DEVICES 1a. Check the serial number of devices against the list of affected devices in this letter to confirm the affected units. 2b. Update the firmware on the device via the Rheo Knee Update application This application can only be used to update the affected devices: i. A computer running Windows Operating System 10 or 11 is required to run the Rheo Knee Update application. It is not compatible with Android or iOS and cannot be completed via mobile phones. ii. Access the Rheo Knee Update application via this link: htps://www.ossur.com/global/prismic/generic/rheo-knee-update-language iii. Follow the steps outlined in the application to complete the firmware update. iv. If there are any issues with completing the firmware update successfully, please contact ssur technical support at 1-800-233-6263 ext. 10. 2. PLEASE PASS THIS NOTICE to those who need to be aware within your organization. If you have further distributed this product, please identify your customers, and notify them at once of this product alert. We recommend that you include a copy of this notice. 3. PLEASE MAINTAIN AWARENESS of this notice and required actions for an appropriate period to ensure effectiveness of the corrective action.
Quantity in commerce: 1 unit
Distribution: US Nationwide distribution in the states of AL, AZ, CA, CO, DE, FL, GA, HI, IA, ID, IL, IN, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NH, NJ, NM, NY, OH, OR, PA, RI, SC, TN, TX, UT, VA, WA, WI, WV, WY.
Product codes and lots: UDI: 05690977467811/ Serial Number: HF363264

Enforcement reports

One row per recalled product line

FDA enforcement reports joined to recall event Z-1790-2024
Recall number	Class	Status	Voluntary or mandated	Report date	Classified
Z-1787-2024	Class II	Ongoing	Voluntary: Firm initiated	2024-05-22	2024-05-10
Z-1788-2024	Class II	Ongoing	Voluntary: Firm initiated	2024-05-22	2024-05-10
Z-1789-2024	Class II	Ongoing	Voluntary: Firm initiated	2024-05-22	2024-05-10
Z-1790-2024	Class II	Ongoing	Voluntary: Firm initiated	2024-05-22	2024-05-10

Product code ISW

The FDA recall record names no cleared device, and no clearance has been matched to it.

MDM coverage of this record lists here, newest first.

About this record

Sourced from the FDA device recall database and the FDA enforcement reports, both ingested from openFDA. The recall record supplies the product, the reason and the product code; the enforcement report supplies the classification. The two datasets are exported by FDA on different days, and the date above is the older of the two, so nothing on this page is newer than it says.

MDM adds the root cause tag, derived from FDA’s own root cause text, and the cross-links to the product code, the clearances named on the record and MDM coverage. Where a recall has not been joined to an enforcement report, no classification is shown.

Data as of 2026-09-30, the FDA export date for this dataset. Page last changed 2026-09-05. View this recall on fda.gov (opens on fda.gov)