You just clicked a link to go to another website. If you continue, you may go to a site run by someone else.
We do not review or control the content on non-Medtronic sites, and we are not responsible for any business dealings or transactions you have there. Your use of the other site is subject to the terms of use and privacy statement on that site.
It is possible that some of the products on the other site are not approved in your region or country.
Your browser is out of date
With an updated browser, you will have a better Medtronic website experience. Update my browser now.
The content of this website is exclusively reserved for Healthcare Professionals in countries with applicable health authority product registrations.
Click “OK” to confirm you are a Healthcare Professional.
Review the anatomical considerations of the retroperitoneal space.
In OLIF25 and OLIF51 approaches, the patient is positioned laterally and the peritoneal contents move anteriorly and contralaterally with gravity. A surgeon’s gloved fingers or blunt instruments are used to access the retroperitoneal space.
A finger or blunt instrument can protect the peritoneum as lighted retractors are placed.
The ureter is located anterior to the psoas and close to the posterior aspect of the peritoneum. It is usually attached by a small adventitial layer to the posterior wall of the peritoneum and will be swept forward along with peritoneum during an OLIF25 and OLIF51 approach. Risk of injury can be minimized by visualizing and protecting the ureter and peritoneum with a lighted retractor.
The location of the kidneys should be evaluated preoperatively with an axial MRI. In some patients, the kidneys are found in an unusual position (below the L2 vertebrae) as seen following a kidney transplant. In such patients, this could also alter the course of the ureter.
The retroperitoneum space contains the lumbar plexus and lumbar region vasculature. Learn more about the lumbar plexus and the lumbar region vasculature.