What is a step‑by‑step guide for performing arthrocentesis with intra‑articular steroid injection?

Step-by-Step Guide for Arthrocentesis with Steroid Injection

Arthrocentesis with intra-articular steroid injection should be performed using strict aseptic technique in an appropriate clinical setting, with informed consent, proper patient positioning, consideration of local anesthesia, and ultrasound guidance when available to maximize accuracy. 1

Pre-Procedure Requirements

Patient Preparation and Consent

• Obtain and document informed consent explaining the nature of the procedure, potential benefits (pain relief, reduced inflammation), risks (infection 0.035%, transient hyperglycemia in diabetics, vasovagal reactions 2.6%), and post-injection care 1
• Inform diabetic patients, especially those with suboptimal control, about transient increased glycemia risk from days 1-3 post-injection and advise glucose monitoring during this period 1
• Confirm appropriate diagnosis has been made before administering steroids, particularly ruling out septic arthritis 1
• Do not withhold procedure in patients on antithrombotic medications or with clotting disorders unless bleeding risk is high 1

Optimal Setting Setup

• Use a professional, clean, quiet, private, well-lit room 1
• Position patient on an adjustable couch/examination table that can lie flat 1
• Have equipment for aseptic procedures readily available 1
• Keep resuscitation equipment close by (vasovagal reactions occur in 2.6% of cases) 1
• Consider having another healthcare professional present to assist 1

Procedure Steps

1. Aseptic Technique (Mandatory)

• Always use strict aseptic technique - the current risk of septic arthritis is 0.035% (3 per 7,900 procedures) 1
• Wear surgical gloves 1
• Prepare skin with alcohol, iodine disinfectant, or chlorhexidine 1
• Change needles between drawing the medication and injecting into the joint 1

2. Local Anesthesia (Offer to All Patients)

• Offer local anesthetic while explaining pros and cons to reduce discomfort during the procedure and extend pain reduction 1
• Options include:
  • Topical: Ethyl chloride spray or EMLA cream (lidocaine 2.5%/prilocaine 2.5%) 1
  • Infiltrative: Local anesthetic along the needle path or subcutaneous tissue 1
  • Intra-articular: Mixed with glucocorticoid or injected separately 1

3. Needle Placement and Accuracy

• Use ultrasound guidance when available to improve accuracy, particularly for deep joints like the hip and shoulder 1
• Ultrasound improves delivery accuracy though clinical outcomes are similar to landmark-guided approaches 1
• For landmark-guided knee injections, use the superolateral approach which achieves 91% accuracy (95% CI 84-99%) 1
• Each peripheral joint has different optimal routes of entry based on anatomy 1
• Expertise in the procedure is critical and depends on practice and appropriate training 1

4. Aspiration (When Indicated)

• Aspirate synovial fluid when present to:
  • Confirm needle is in the joint space 1
  • Obtain diagnostic samples for crystal analysis, culture, or cytology if indicated 2, 3
  • Decompress effusions for symptom relief 2

5. Steroid Injection

• After confirming intra-articular placement, inject the glucocorticoid preparation 1
• Use long-acting insoluble corticosteroids for sustained anti-inflammatory effect 2
• Dose and approach should be defined for each specific joint and indication 1

Post-Procedure Care

Immediate Instructions

• Advise patients to avoid overuse of the injected joint for 24 hours following injection 1
• Immobilization is discouraged - normal gentle movement is appropriate 1

Special Populations

• For diabetic patients: Monitor glucose levels particularly from day 1 to day 3 post-injection 1
• Timing considerations: Perform at least 3 months prior to planned joint replacement surgery; after joint replacement, consult with surgical team before proceeding 1

Reinjection Decisions

• Base the decision to reinject on benefits from previous injections and individualized factors including treatment options, compound used, systemic treatment, and comorbidities 1

Common Pitfalls to Avoid

• Never administer intra-articular steroids without appropriate diagnosis or before ruling out contraindications, particularly septic arthritis 1
• Do not skip informed consent - patients surveyed emphasized this as essential 1
• Avoid performing the procedure without resuscitation equipment nearby given the 2.6% vasovagal reaction rate 1
• Do not forget to warn diabetic patients about glucose monitoring needs 1
• Avoid recommending strict immobilization post-procedure as this is discouraged 1