The arthroscopic and ultrasonographic boundaries of the equine femorotibial joints.
Authors: Barrett M F, Frisbie D D, McIlwraith C W, Werpy N M
Journal: Equine veterinary journal
Summary
# Editorial Summary: The arthroscopic and ultrasonographic boundaries of the equine femorotibial joints Understanding the diagnostic capabilities and blind spots of our imaging tools is essential for thorough stifle assessment, yet few resources directly compare what arthroscopy and ultrasonography can actually visualise in the femorotibial joint. Barrett and colleagues performed simultaneous arthroscopy and ultrasonography on cadaver stifles (n=10) and a surgical case, tracking the arthroscopic probe in real time via ultrasound to map the spatial relationships between imaging modalities and anatomical structures. Arthroscopy excelled at visualising cranial meniscal ligaments, the distal cranial cruciate ligament, and portions of the collateral ligaments, but offered only limited views of the meniscal abaxial borders; conversely, ultrasonography provided nearly complete visualisation of the menisci, both collateral ligaments, and cranial meniscal ligaments, whilst also capturing part of the cranial cruciate ligament. These findings highlight that ultrasonography and arthroscopy are genuinely complementary rather than interchangeable—practitioners relying on a single modality will miss significant pathology. For practitioners managing stifle lameness, this work underscores the value of combining both imaging techniques for a complete clinical picture and suggests that ultrasonography's superior soft-tissue resolution may allow earlier detection of mild degenerative changes before arthroscopic findings become apparent.
Read the full abstract on PubMed
Practical Takeaways
- •Use arthroscopy and ultrasonography as complementary tools rather than competing modalities—each reveals different structural details of the femorotibial joint
- •Ultrasonography is superior for evaluating menisci and ligaments in clinical practice, while arthroscopy provides better direct visualization of cranial structures and joint surfaces
- •For suspected stifle injuries, combining both imaging modalities will detect more pathology and provide a more complete clinical picture than either alone
Key Findings
- •Arthroscopy provided superior visualization of cranial meniscal ligaments, distal cranial cruciate ligament, and proximal medial collateral ligament but limited view of meniscal borders
- •Ultrasonography allowed nearly complete visualization of menisci, collateral ligaments, and cranial meniscal ligaments with partial cranial cruciate ligament visibility
- •Combined use of arthroscopy and ultrasonography provides complementary diagnostic information for comprehensive femorotibial joint assessment
- •Ultrasonography shows promise for detecting mild pathological changes in femorotibial joint structures