PsiF
Posterior SI Fusion
SI joint pain relief from an implant the size of your pinky finger.
PsiF Product Features
One size structural allograft implant (8x10x25mm)
Familiar prone patient position
Simple posterior approach
Tapered nose design for easy insertion
Well-designed instrumentation for reproducible results
Access our PsiF Coding Guides
Share some quick information and gain access to our 2025 PsiF Coding Guides and an exclusive webinar with our CPC professional.
Is PsiF Right for Your Patient?
The Fortin Finger Test
To begin diagnosing SI joint dysfunction, the patient must be able to pinpoint the area where the pain originates. This is typically done through the Fortin Finger Test, where the patient points to the PSIS as the most prominent landmark where the pain originates.
It's important to note that while the pain may radiate, it must originate near the PSIS for the test to be positive.
Physical Exam
There must be a positive response on THREE physical examination tests, including:
Faber Test
Thigh High Thrust Test
Distraction Test
Gaenslen Test
SI Joint Injections
The injection helps determine if the SI joint is the specific source of your pain. If the steroid injection provides relief, then the SI joint can be confirmed as the source of your pain
Two (2) positive Diagnostic SI Joint injections
One (1) Therapeutic SI Joint Injection
Both showing 75% relief, Duration not specified
Do note: Private insurance can vary in requirement for pain relief.
~70% to 80%
Imaging
The patient must have the following imaging:
CT or MRI of the lumbar spine including the SI Joint
X-RAY of the pelvis and hips
Frequently Asked Questions
-
The PsiF system is a viable solution for patients with sacroiliac joint dysfunction who have exhausted non-surgical treatment options. This innovative system enables physicians to stabilize the SI joint through a minimally invasive posterior approach, providing patients with immediate pain relief and improved function.
-
Patients may leave the ASC/Hospital the same day as the procedure.
Canes, crutches, or a walker can help to reduce stress on the SI joint as it fuses and patients can walk as tolerated within hours after the procedure.
The first post-operative visit is at 1 week.
Before this first post-op visit, follow these instructions:
Keep incisions dry and dressing on (sponge baths)
Avoid driving long distances
No lifting above 10 LBS before this visit
Heat therapy can help reduce muscle tensions and spasms caused by the surgery
Applying ice can reduce painful inflammation
During the visit, the HCP will determine if the patient can return to work with light activities.
The second post-operative visit is around 4 weeks.
Avoid running or jumping for 12 weeks
Pain medication as prescribed/regular diet
Patients can likely resume full activity at 12 weeks.
