Femoral acetabular impingement syndrome
Guided Injections.
Femoroacetabular Impingement (FAI)
Femoroacetabular impingement (FAI) happens when abnormal bone growth in the hip joint leads to friction between the femoral head and the acetabulum. This can lead to pain, stiffness, and limited mobility, especially among athletes and active individuals. If conservative treatments like physiotherapy and anti-inflammatory medications don’t work, ultrasound-guided corticosteroid injections can offer significant pain relief and improve function. Let’s delve into FAI, its symptoms, and treatment options, focusing on the benefits of ultrasound-guided injections.
Understanding Femoroacetabular Impingement (FAI)
FAI occurs when there’s abnormal contact between the ball and socket of the hip joint due to bone overgrowth. This can damage the joint, wear down cartilage, and increase the risk of hip osteoarthritis.
Types of FAI:
Cam Impingement: Excess bone growth on the femoral head, causing it to rub against the acetabulum (Ganz et al., 2003).
Pincer Impingement: Overgrowth of the acetabular rim leads to excessive femoral head coverage (Tannast et al., 2015).
Mixed Impingement: A combination of both cam and pincer impingement.
Common Signs and Symptoms:
- Deep groin pain, especially after prolonged activity
- Stiffness and limited hip mobility
- Clicking or locking sensations in the hip joint
- Pain during hip flexion and rotation
Ultrasound-Guided Corticosteroid Injections for FAI
Corticosteroid injections help reduce inflammation within the hip joint, providing significant pain relief and allowing patients to engage in physiotherapy more effectively. Ultrasound guidance ensures precise placement, improving treatment efficacy and reducing risks.
Benefits of Corticosteroid Injections:
- Rapid pain relief within days (Hunter et al., 2019)
- Reduces inflammation, improving hip mobility
- Enhances physiotherapy outcomes by minimising discomfort
- Minimally invasive alternative to surgery
What to Expect During the Procedure:
- The injection site is sterilised.
- Ultrasound imaging guides the needle into the hip joint.
- A local anaesthetic and corticosteroid are injected.
- The procedure is quick and minimally painful.
Who Can Benefit from This Treatment?
This injection therapy is ideal for individuals who:
- Experience chronic hip pain due to FAI
- Have inflammation that limits mobility
- Want to delay or avoid surgical intervention
FAQs
How Long Does Pain Relief Last?
The duration of pain relief varies, typically lasting from a few weeks to several months, depending on the severity of FAI and the patient’s response to treatment.
Potential Side Effects:
Ultrasound-guided corticosteroid injections are safe with minimal risks. Possible side effects include:
- Temporary soreness at the injection site (Scott et al., 2023)
- Mild swelling or bruising (McCabe et al., 2016)
- Rarely, joint infection or skin thinning (McCabe et al., 2016)
When Should Surgery Be Considered?
Hip arthroscopy or FAI surgery may be necessary if injections and physiotherapy fail to provide long-term relief. A consultation with a specialist can determine the best treatment path for your condition.
Treatment options
Guided Corticosteroid Injections
For persistent pain, corticosteroid injections may be recommended to reduce inflammation and provide short-term relief.
Your Clinician
BSc Physiotherapy MSCP (Hons)
PGCert Independent Medical Prescriber
PGCert Soft Tissue and Joint Injection Therapist
PGCert Diagnostic Ultrasound
Ganz R, et al. (2003). “Femoroacetabular impingement: A cause for osteoarthritis of the hip.” Clinical Orthopaedics and Related Research, 417, 112-120.
McCabe, P. S., Maricar, N., Parkes, M. J., Felson, D. T., & O’Neill, T. W. (2016). The efficacy of intra-articular steroids in hip osteoarthritis: a systematic review. Osteoarthritis and Cartilage, 24(9), 1509-1517.