Reamer - Irrigator - Aspirator (RIA)
The reamer-irrigator-aspirator (RIA) is indicated for the treatment of acute fractures in preparation for acceptance of a nail or prosthesis and for harvesting intramedullary reamings for bone grafting. It should not be used in patients with severe osteopenia. The RIA provides irrigation and aspiration during reaming, which allows for single-pass reaming and has been shown to reduce intramedullary pressure. Normal saline irrigation flows through the drive shaft and reamer head into the medullary canal. When coupled with adequate suction, the irrigation mixes with the morselized medullary content which is then evacuated through the aspiration tube. RIA mandates a suction device. The procedure has to be abandoned if suction does not work.
RIA also harvests finely morselized autogenous bone and bone marrow for any surgical procedure which requires bone graft to facilitate fusion and/or fill bone defects.
Experience with RIA show a low morbidity, reduced postoperative pain, and a larger volume of obtained graft material compared to traditional iliac crest method.
Expanding the range of options for intramedullary sizing, the RIA system reamer heads are now available in additional diameters of 11.0, 17.5, 18.0, 18.5, and 19.0?mm. This will offer an overall range from 11.019.0?mm in 0.5?mm increments. They are sterile packaged and intended for single-patient use.
A locking clip to prevent the RIA tube assembly from detaching from the RIA drive shaft during reaming has been added. The locking clip is attached to the RIA system after the drive shaft has been connected to the tube assembly and is designed to clip and remain in place during reaming. The locking clip is sterile packed and intended as a disposable, single-patient use item.
Specially sized irrigation-aspiration tubing has been designed to further facilitate adequate aspiration. A small plastic clip can be used to close off the irrigation until reaming begins.
The tubes come together in one sterile package but can easily be separated from each other so that they can be attached to the two locations in the operating room.
RIA Bone Graft Filter
A bone graft filter is used with a capacity of 100 cc's. An inner mesh with 0.5 mm pore size captures morselized bone and bone marrow. A plunger can be used to compress and expel the captured graft material. The graft filter is a disposable, single use item which comes sterile packed.
Frequently Asked Questions about the RIA System
Annotated RIA Abstracts
Hazards and labeling
Due to varying countries’ legal and regulatory approval requirements, consult the appropriate local product labeling for approved intended use of the products described on this website. All devices on this website are approved by the AO Technical Commission. For logistical reasons, these devices may not be available in all countries worldwide at the date of publication.
This work was produced by AO Foundation, Switzerland. All rights reserved by AO Foundation. This publication, including all parts thereof, is legally protected by copyright.
Any use, exploitation or commercialization outside the narrow limits set forth by copyright legislation and the restrictions on use laid out below, without the publisher‘s consent, is illegal and liable to prosecution. This applies in particular to photostat reproduction, copying, scanning or duplication of any kind, translation, preparation of microfilms, electronic data processing, and storage such as making this publication available on Intranet or Internet.
Some of the products, names, instruments, treatments, logos, designs, etc referred to in this publication are also protected by patents, trademarks or by other intellectual property protection laws (eg, “AO” and the AO logo are subject to trademark applications/registrations) even though specific reference to this fact is not always made in the text. Therefore, the appearance of a name, instrument, etc without designation as proprietary is not to be construed as a representation by the publisher that it is in the public domain.
Restrictions on use: The rightful owner of an authorized copy of this work may use it for educational and research purposes only. Single images or illustrations may be copied for research or educational purposes only. The images or illustrations may not be altered in any way and need to carry the following statement of origin “Copyright by AO Foundation, Switzerland”.
Check www.aofoundation.org/disclaimer for more information.
If you have any comments or questions on the articles or the new devices, please do not hesitate to contact us.
“approved by AO Technical Commission” and “approved by AO Foundation”
The brands and labels “approved by AO Technical Commission” and “approved by AO Foundation”, particularly "AO" and the AO logo, are AO Foundation's intellectual property and subject to trademark applications and registrations, respectively. The use of these brands and labels is regulated by licensing agreements between AO Foundation and the producers of innovation products obliged to use such labels to declare the products as AO Technical Commission or AO Foundation approved solutions. Any unauthorized or inadequate use of these trademarks may be subject to legal action.