Hip Joint Injection
|Hip Joint Injection|
|Indication||Diagnostic injection, Hip Osteoarthritis, MR arthrogram|
|Needle||22-gauge Quincke needle|
|Injectate||optional 40mg triamcinolone acetonide, saline, PRP, HA|
|Local||5mL 1% lidocaine|
Hip joint injections can be performed with a variety of image guidance, including fluoroscopy and ultrasound, which are used to administer MRI arthrogram injectate, or a steroid containing anaesthetic arthrogram injectate.
Indications and Evidence
- Main article: Hip Osteoarthritis
- Therapeutic - e.g. hip osteoarthritis. All injection options including saline give moderate relief of pain up to 8 weeks.
- Diagnostic - good relief of pain with local anaesthetic injection predicts good outcomes from total hip arthroplasty.
- MRI: labral injury
- Absolute: anaphylaxis to contrast/ injectates, active local/ systemic infection
- Relative, bleeding diathesis, recent injection with steroid in same/ other body parts (anaesthetic arthrogram), unable to remain still for the procedure
- ultrasound machine, sterile probe cover and a skin marker (ultrasound)
- skin marker, a metal rod for marking and short connecting tube (fluoroscopy)
- skin cleaning product
- sterile drape
- sterile field and tray for sharps
- syringe selection i.e. 10mL, 5mL and 20mL
- larger bore drawing up needle
- needle to administer local anaesthetic i.e. 25-gauge needle
- needle to cannulate the joint i.e. 22-gauge needle Quincke needle
- injectants i.e. local anaesthetics, iodinated contrast, corticosteroid preparation
- sterile gauze
- adhesive dressing
Ultrasound guidance is less painful and more convenient than fluoroscopy, with 98% of patients preferring ultrasound.
- Patient Position: optimise patient positioning by laying them supine, with a bolster on the lateral aspect of the ipsilateral foot, holding it in internal rotation
- Identify the joint
- Use a linear probe, or in obese patients a curvilinear probe.
- Identify adjacent neurovascular structures
- Identify the anterior hip joint in a longitudinal plane; parallel to the long axis of the femoral neck, and then optimise imaging and mark the skin entry point at the end of the probe.
- Clean skin and draw up appropriate medications. Consider local anaesthesia along the proposed needle path.
- Needle approach
- Under ultrasound guidance insert the needle in-plane with the probe in a caudal-cranial direction targeting the femoral head-neck junction (anterior joint recess) of the femur and reach the bone
- Administer injectate under direct visualisation
In obese patients where even a spinal needle can't reach the joint, another option is going anterolaterally. Orient the probe axially, and view the femoral head and acetabular rim. This often will shorten the distance to the joint. Approach the joint anterolaterally, avoiding the neurovascular bundle, and advance until the tip rests on the femoral head. 
Anterior longitudinal approach for an in-plane hip joint injection.
Anterior longitudinal approach. The needle is introduced from an inferior and anterior approach, lateral to the femoral neurovascular bundle (arrow). A, acetabulum; H, femoral head; N, femoral neck; double arrow – anterior joint recess.
Anterolateral approach. Transverse image of the hip joint. The needle is introduced from a lateral and anterior approach, to rest on the femoral head (arrow). A, acetabulum; H, femoral head; N, femoral neck; LAT, lateral; MED, medial.
- optimise patient positioning by laying them flat and supine on the bed, with a small bolster under the knee and a further bolster on the ipsilateral foot to keep it in internal rotation
- optimise imaging field and using the metal rod mark the skin at the target entry point; both ‘eye of the needle’ and oblique needle techniques are used and the lateral femoral neck is the target 2
- clean skin and draw up appropriate medications
- consider local anaesthesia along the proposed needle path
- under fluoroscopic guidance insert a needle targeting the lateral femoral neck and reach bone
- check an intra-articular needle tip position with a small amount of iodinated contrast via connection tubing and save a post-injection image/ video run
- administer arthrogram injectate
- remove the needle and apply dressing as required
Initial injections can be extra-articular but if the needle is repositioned before giving the injectate this often has no effect. Excess extra-articular solution may distort an MRI arthrogram, especially if the MRI injectate is outside of the joint. The most serious complication is an infection causing septic arthritis. A steroid flare after injection can occur but symptoms will resolve after 1 - 2 days. Injections should be postponed if there are signs and/or symptoms of local and/ or systemic infection. Fat necrosis causing skin dimpling and skin discolouration can occur due to steroid leaking into the surrounding soft tissues 3, although less common in deeper injections.
- Byrd et al.. Ultrasound-guided hip injections: a comparative study with fluoroscopy-guided injections. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2014. 30:42-6. PMID: 24384272. DOI.
- Yeap & Robinson. Ultrasound Diagnostic and Therapeutic Injections of the Hip and Groin. Journal of the Belgian Society of Radiology 2017. 101:6. PMID: 30498802. DOI. Full Text.
- Reviews from the last 7 years: review articles, free review articles, systematic reviews, meta-analyses, NCBI Bookshelf
- Articles from all years: PubMed search, Google Scholar search.
- TRIP Database: clinical publications about evidence-based medicine.
- Other Wikis: Radiopaedia, Wikipedia Search, Wikipedia I Feel Lucky, Orthobullets,