Diagnostic needle arthroscopy of the scapulohumeral joint in standing sedated horses.
Authors: Pouyet Morgane, Bonilla Alvaro G
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Standing Needle Arthroscopy of the Equine Shoulder Diagnostic imaging of the equine shoulder remains challenging, particularly for soft tissue and cartilage lesions, motivating investigation into minimally invasive arthroscopic techniques that might be performed in standing sedated horses. Pouyet and Bonilla evaluated the feasibility and efficacy of a 1.2-mm needle arthroscope via a craniolateral approach, first assessing the technique on eight cadaveric thoracic limbs against conventional 4-mm arthroscopy, then validating the procedure in six live horses under sedation. The needle arthroscope successfully visualised the centrolateral joint compartment in all horses, with complete or partial visualisation of craniolateral and caudolateral structures achieved in three and six animals respectively; both phase 1 and phase 2 procedures demonstrated comparable diagnostic capability, mild fluid extravasation, rapid performance, and excellent tolerance with no postoperative complications. Whilst this standing technique offers a genuine advantage in accessibility and animal welfare by avoiding general anaesthesia, its inherent limitations—inability to assess the medial humeral head and most of the glenoid cavity—must be acknowledged when considering its role in shoulder lameness investigations. For practitioners managing horses with suspected scapulohumeral pathology, this technique potentially fills a diagnostic gap between ultrasound and conventional arthroscopy, particularly where localised lateral compartment lesions are suspected.
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Practical Takeaways
- •Needle arthroscopy offers a minimally invasive standing diagnostic option for horses with suspected lateral shoulder pathology, avoiding general anesthesia risks
- •This technique is suitable for evaluating centrolateral joint structures but cannot replace conventional arthroscopy for comprehensive shoulder assessment or treatment
- •Standing needle arthroscopy may help confirm shoulder diagnoses in lameness cases where medial structures are not involved, improving diagnostic accuracy in field practice
Key Findings
- •Needle arthroscopy (1.2-mm arthroscope) successfully visualized the centrolateral aspect of the scapulohumeral joint in all 6 standing sedated horses with no postoperative complications
- •Visualization was complete for centrolateral structures but limited to partial views of craniolateral and caudolateral aspects due to the standing position
- •The technique allowed evaluation of approximately the lateral half of the humeral head and lateral glenoid rim, comparable to 4-mm arthroscope visualization in cadaveric limbs
- •The standing approach prevented assessment of the medial humeral head and most of the glenoid cavity