Use with care. These outputs are educational and should be verified by a clinician. They do not determine diagnosis, treatment eligibility, contrast safety, transplant priority, or tumor response by themselves. RECIST also considers non-target disease and new lesions. For transplant decisions, use the current official OPTN MELD calculator.
What is GAE?
Genicular artery embolization, or GAE, is performed by an interventional radiologist. Through a small puncture—usually near the groin or wrist—a thin catheter is guided into arteries supplying the knee. Angiography is used to identify abnormal increased blood flow associated with inflammation. Tiny embolic particles are then delivered selectively to reduce that abnormal blood flow while preserving the normal circulation.
Who may be evaluated?
GAE may be discussed when knee pain has continued despite treatments such as activity modification, physical therapy, medication, or injections. Evaluation usually includes a clinical examination and knee radiographs; MRI may sometimes help assess other causes of pain and the pattern of inflammation. GAE does not restore lost cartilage, correct major mechanical deformity, or guarantee that joint replacement will never be needed.
What happens afterward?
Many procedures are performed without an overnight hospital stay. Patients receive institution-specific instructions about activity, medications, wound care, and follow-up. Improvement is not necessarily immediate and response varies. Ongoing exercise, weight management when appropriate, and care from the broader arthritis team may remain important.
Benefits, uncertainty, and risks
Studies report improvement in pain and function for some carefully selected patients, but results differ and research continues to refine selection, technique, and long-term outcomes. Potential complications include bruising or bleeding at the access site, temporary skin discoloration, pain after the procedure, contrast reaction or kidney injury, arterial injury, infection, and unintended embolization of nearby tissue. Your interventional radiologist should explain risks specific to your health and anatomy.
Questions to ask your physician
- Is osteoarthritis the main source of my pain?
- Which standard treatments should I try first?
- How experienced is the team with GAE?
- What outcome is realistic for me, and how will it be measured?
- What are my alternatives if GAE does not help?
By Ahmad Hussain, MD · August 30, 2026
What is the goal?
Adhesive capsulitis, often called frozen shoulder, causes pain and progressive restriction of movement. Shoulder or adhesive capsulitis embolization uses a small catheter to identify and reduce abnormal blood flow associated with inflamed tissue around the shoulder. The procedure aims to reduce pain so that movement and rehabilitation may become easier; it does not mechanically release the capsule.
Where does it fit in care?
Most patients are first treated with options such as guided exercise or physical therapy, pain medication, and injections when appropriate. Embolization may be considered at specialized centers for selected patients whose symptoms remain significant despite conservative care. A careful evaluation is needed to confirm the diagnosis and exclude other sources of shoulder pain, including a major tendon tear, arthritis, infection, or cervical spine disease.
What does current evidence mean?
Early studies have reported improvements in pain, function, and range of motion, but the studies use different techniques and outcome measures. Larger controlled studies and longer follow-up are still needed. Patients should understand that this remains an emerging option and may not be routinely available or covered by insurance.
Risks and recovery
Possible risks include access-site bruising or bleeding, temporary skin changes, discomfort, contrast reaction or kidney injury, vessel injury, infection, and unintended embolization. Rehabilitation may still be recommended after treatment. The treating team should provide a personalized plan and explain when to seek urgent care.
Questions to ask your physician
- Has my diagnosis been confirmed and have other causes been excluded?
- Which conservative treatments remain appropriate?
- Is embolization offered as standard care or through a study?
- Will I need physical therapy afterward?
- What evidence and outcomes does this center use when counseling patients?
By Ahmad Hussain, MD · August 30, 2026
What is it?
Transarterial embolization for hip osteoarthritis is an image-guided procedure intended to reduce abnormal blood flow associated with inflammation around the painful hip. An interventional radiologist advances a small catheter into selected arteries and delivers embolic material under X-ray guidance. The treatment is different from a hip injection and does not replace damaged cartilage or reshape the joint.
Who might be considered?
Published studies have generally evaluated patients with clinically and radiographically confirmed hip osteoarthritis whose symptoms persisted despite conservative treatment. Hip pain can also arise from the spine, tendons, bursae, or other conditions, so accurate diagnosis is essential. Patients with advanced structural disease may still be better served by established treatments, including arthroplasty when appropriate.
How strong is the evidence?
The evidence is preliminary. Small observational studies have reported improvement for some patients, but these results cannot establish how embolization compares with established treatments or how durable the benefit will be. It should be described as an emerging or investigational option, ideally considered at an experienced center or within a research protocol.
Risks and follow-up
Potential risks include access-site bleeding or bruising, temporary skin discoloration, pain, contrast reaction or kidney injury, vessel injury, infection, and unintended embolization. Follow-up is important to assess pain, walking, daily function, and whether additional treatment is needed.
Questions to ask your physician
- What confirms that osteoarthritis is causing my hip pain?
- Is this procedure investigational at your institution?
- What established treatments remain available to me?
- Could embolization affect future surgery?
- How will my pain and function be followed over time?
By Ahmad Hussain, MD · August 30, 2026
04 / Pain & function
What do pain scores actually measure?
Pain intensity, daily function, and quality of life are different outcomes. A single number cannot describe all three.
VAS and NRS
A visual analogue scale (VAS) usually asks you to mark your pain on a continuous 100-mm line between no pain and the worst pain imaginable. The distance to your mark becomes the score. A numerical rating scale (NRS) instead asks you to choose a number, commonly from 0 to 10. Higher values mean greater pain intensity. They are related tools, but a 0–10 number selector is not the same instrument as a true VAS. Neither establishes the cause of pain or measures joint damage. VA/DoD guidance on pain assessment ↗︎
KOOS: the knee
The Knee injury and Osteoarthritis Outcome Score asks about five areas: pain, other knee symptoms, everyday activities, sport and recreation, and knee-related quality of life. Each subscale runs from 0 to 100; higher scores indicate fewer problems. Results should identify the subscale, rather than present an unexplained “KOOS total.” The full KOOS and shorter versions such as KOOS-12 or KOOS, JR are not interchangeable. In knee treatment follow-up, the same version and scoring method should be used each time. Official KOOS information and access ↗︎
WOMAC: knee and hip
The Western Ontario and McMaster Universities Osteoarthritis Index uses 24 questions covering pain, stiffness, and physical function in hip or knee osteoarthritis. Several response formats and reporting scales exist. In standard scoring, higher values generally mean worse symptoms or disability, but some reports reverse or normalize the scale. Always check the version, range, and direction before comparing two studies or visits. A WOMAC result should be interpreted alongside your examination and treatment goals. Official WOMAC information ↗︎
SPADI: the shoulder
The Shoulder Pain and Disability Index contains 13 questions addressing pain and difficulty with activities involving the shoulder. Scores are commonly reported from 0 to 100, with higher values indicating more pain or disability. It can help track symptoms during rehabilitation or after a shoulder intervention. It cannot distinguish frozen shoulder from a rotator cuff tear or another cause of pain; that requires clinical assessment. SPADI validation study ↗︎
Comparing follow-up scores
Use the same questionnaire, recall period, and activity context at each visit. Pain at rest and pain while climbing stairs answer different questions. Record the date, medication changes, and an activity you want to regain. Improvement on KOOS generally moves upward; improvement on NRS and SPADI generally moves downward. The amount of change that matters depends on the instrument, condition, and person—there is no universal cutoff that proves a procedure worked.
Ask at your next visit
- Which questionnaire and version are we using?
- Does a higher score mean improvement or worsening?
- Are we measuring pain at rest, with activity, or over a particular period?
- How does my score relate to walking, sleep, work, or other goals?
By Ahmad Hussain, MD · September 4, 2026
Child–Pugh
The Child–Turcotte–Pugh score combines bilirubin, albumin, and INR blood tests with clinical assessments of ascites (fluid in the abdomen) and hepatic encephalopathy (brain-function changes related to liver disease). Class A is 5–6 points, B is 7–9, and C is 10–15; increasing class generally reflects more severe liver dysfunction. Ascites and encephalopathy need a clinician's assessment, and medication or treatment can affect interpretation. University of Washington Child–Pugh tool ↗︎
MELD 3.0
The Model for End-Stage Liver Disease helps assess medical urgency for liver transplantation. The current US calculation includes bilirubin, INR, creatinine, sodium, and albumin, with age, dialysis, and adult sex-related rules. Higher scores generally indicate greater urgency. MELD 3.0 differs from earlier MELD and MELD-Na formulas. Transplant allocation may also involve exception scores and other policies, so an online result alone does not establish a person's position on the waiting list. Official OPTN MELD calculator ↗︎
ALBI
The albumin–bilirubin score uses two blood tests to estimate liver functional reserve. It was developed in people with hepatocellular carcinoma, the most common primary liver cancer. ALBI grades range from 1 to 3, with grade 1 representing better reserve and grade 3 worse reserve. Unlike Child–Pugh, it does not require grading ascites or encephalopathy. It complements the overall assessment rather than replacing it. Original ALBI study ↗︎
Why this matters in IR
A liver-directed treatment must be considered in the context of how well the remaining liver works. For example, ALBI has been studied in patients undergoing radioembolization. A favorable score does not guarantee that treatment is suitable; imaging, tumor extent, blood-vessel anatomy, other illnesses, and the proposed treatment also matter. No single score on this page provides clearance for embolization or ablation. ALBI and radioembolization outcomes ↗︎
Ask your liver team
- Which score is relevant to the decision we are making?
- How recent are the blood tests, and could treatment affect them?
- How does my liver reserve affect the proposed procedure?
- Is this a laboratory MELD score or a transplant exception score?
By Ahmad Hussain, MD · September 4, 2026
LI-RADS: liver imaging
Radiologists use LI-RADS in eligible patients at increased risk of hepatocellular carcinoma. For diagnostic CT/MRI, LR-1 means definitely benign, LR-2 probably benign, LR-3 intermediate probability of HCC, LR-4 probably HCC, and LR-5 definitely HCC when the system's criteria apply. Additional categories describe other findings or an examination that cannot be adequately assessed. These are not stages 1–5 of liver cancer. Ultrasound surveillance uses a different LI-RADS system, so an ultrasound category should not be interpreted using the CT/MRI scale. ACR/RSNA guide to LI-RADS ↗︎
After liver treatment
After ablation or embolization, a report may use LI-RADS treatment-response categories to describe the treated area. The applicable categories depend on the treatment and imaging algorithm. Radiation effects can evolve over time; “nonprogressing” can be relevant after radiation-based therapy. Ask your radiologist how the finding compares with earlier scans and when the next assessment is due.
PI-RADS: prostate MRI
PI-RADS categories run from 1 to 5 and express the likelihood of clinically significant prostate cancer on MRI. Lower categories indicate lower suspicion, 3 is equivocal, and higher categories indicate higher suspicion. PI-RADS 5 does not mean “stage 5 cancer,” and a low category does not exclude every cancer. Your urologist considers the MRI alongside PSA, examination, prior biopsy findings, and other risk factors when deciding what to do next. ACR/RSNA guide to prostate MRI reports ↗︎
Reading your own report
- Which organ, lesion, and scoring system does this category refer to?
- Is this a diagnostic category or a treatment-response assessment?
- Has the finding changed compared with earlier imaging?
- What follow-up is recommended, and who will arrange it?
By Ahmad Hussain, MD · September 4, 2026