Short-axis (SAX) humeral head 18-4 MHz ultrasound images show 25 G 5 cm needle (arrows) approaching into the sub-acromial sub-deltoid (SASD) bursal space (rhomboid) during 10 mL 0.25% bupivacaine injection. Note the bursal space widening in (B).|@|~(^,^)~|@|Short-axis (SAX) neck 18-4 MHz ultrasound images show 25 G 6 cm needle (arrows) approaching into the transverse process near the 6th cervical nerve root (rhomboid) during 2 mg dexamethasone solution injection in (A) and palm 15-7 MHz hockey stick US image shows 30 G 2 cm needle (arrows) approaching on the flexor tendon (FDS and FDP) at the metacarpophalangeal joint level for triamcinolone 2 mg solution injection in (B). Note the anterior (A.T.) and posterior (P.T.) tubercle of the 6th cervical vertebra in (A) and anechoic triamcinolone solution (rhomboids in B) over the flexor tendon and palmar plate and articular cartilage of the metacarpal head in (B).|@|~(^,^)~|@|Short-axis (SAX) proximal humeral shaft 18-4 MHz ultrasound image shows 25 G 5 cm needle (arrows) touching humeral bone at the distal attachment site of the pectoralis major muscle (rhomboids) during prolotherapy in (A) and Short-axis (SAX) lumbar spine 5-2 MHz convex US image shows 23 G 10 cm needle (arrows) touching transverse process tip at the iliolumbar ligament (rhomboids) attachment site during prolotherapy in (B).|@|~(^,^)~|@|Long-axis (LAX) distal elbow 18-4 MHz ultrasound image shows 25 G 5 cm needle (arrows) touching lateral epicondyle of the humeral bone at the attachment site of the common extensor tendon and radial collateral ligament during platelet-rich plasma (PRP) injection. Note the anechoic gap (rhomboid) showing tendon and ligament partial tear and the underlying bony irregularity (dotted line).|@|~(^,^)~|@|(A) Short-axis (SAX) elbow 15-7 MHz hockey stick ultrasound image shows 25 G 5 cm needle (arrows) approaching into the ulnar nerve (star) around the cubital tunnel for hydrodissection using 5% dextrose water (rhomboid) 10 mL all around the nerve to detach it from the surrounding soft tissue and (B) short-axis (SAX) upper back 18-4 MHz ultrasound image shows 23 G 6 cm needle (arrows) approaching the space (rhomboid) between serratus posterior superior and 2nd rib for hydrodissection using 5% dextrose water 10 mL. LS: levator scapula muscle.|@|~(^,^)~|@|Short-axis (SAX) humeral head 18-4 MHz ultrasound image shows 25 G 5 cm needle (arrows) approaching into the intra-articular space through rotator interval (anterior approach) during 3 mL pre-filled hyaluronic acid (Hyruan plusⓇ) injection in (A) and Short-axis (SAX) knee 18-4 MHz US image shows 23 G 4 cm needle (arrows) approaching into the knee joint (rhomboids) from the superolateral side of the knee during 3 mL pre-filled cross-linked hyaluronic acid (SynovianⓇ) injection in (B). CHL: corachohumeral ligament, LHB: long head of biceps.|@|~(^,^)~|@|Long-axis (LAX) distal elbow 18-4 MHz ultrasound image shows 25 G 5 cm needle (arrows) touching lateral epicondyle of the humeral bone at the attachment site of the common extensor tendon and radial collateral ligament during polydeoxyriboneucleotide (PlacentexⓇ) injection. Note the anechoic gap (rhomboid) showing tendon and ligament partial tear in (A) and Short-axis (SAX) knee 18-4 MHz ultrasound image shows 23 G 4 cm needle (arrows) approaching into the knee joint (rhomboid) from the superolateral side of the knee during polyneucleotide (ConjuranⓇ) injection in (B).|@|~(^,^)~|@|Various pre-filled injectable collagen products. RegenSeal (A), Curegen (B), and Tendoregen (C).|@|~(^,^)~|@|(A) Short-axis (SAX) elbow 18-4 MHz ultrasound image shows 25 G 5 cm needle (arrows) approaching into the pronator teres at the elbow joint level for botulinum toxin A injection and (B) short-axis (SAX) palm 15-7 MHz hockey stick ultrasound image shows 30 G 5 cm needle (arrows) approaching into the lumbricalis (dotted ellipse) at the metacarpal head level for botulinum toxin A injection.
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