Ultrasound-guided approach to the cervical articular process joints in horses: a validation of the technique in cadavers.

The research article discusses a study comparing the accuracy of two ultrasound-guided methods: the craniodorsal and the dorsal approach, in injecting some cervical joints in horse cadavers. The study found the accuracy similar for both methods and suggested that this technique can be learnt easily by inexperienced veterinarians.

Introduction and Methodology

• The researchers carried out a comparative study to assess the accuracy of two ultrasound-guided techniques, the craniodorsal (CrD) and the dorsal (D) methods, in injecting contrast dye into the cervical articular process joints in dead horses.
• They injected these joints from 14 cadaveric neck specimens using either a D or CrD approach, a linear or microconvex transducer, and an 18 or 20 gauge needle.
• Two operators were involved in this study – an experienced and an inexperienced one. The injectate consisted of an iodinated contrast material solution.
• Number of redirects, time taken for injection, and retrieval of synicovial fluid, were all recorded.
• Accuracy was measured based on how clearly the contrast was seen on the computed tomography (CT) scans.

Results

• The successful performance of intra-articular injections of contrast detected by CT using the D and CrD approaches was similar, indicating that both techniques have comparable accuracy.
• Neither the approach nor the type of transducer or needle size had any significant effect on the accuracy of the injection, the time taken to perform the injection or the number of redirects required. This shows the versatility of ultrasound-guided injections, as they can be performed effectively regardless of the type of equipment used.
• The larger needle size (18 gauge) was found to have a positive correlation with retrieving synovial fluid, indicating that it may be a better choice for this specific action.
• A positive learning curve was observed for the untrained operator, indicating that this technique can be easily learned by inexperienced veterinarians.

Conclusions

• The research concluded that both the D and CrD approaches to injecting the cervical articular process joints are highly accurate, indicating that either technique can be reliably used in the field.
• It was also mentioned that the process can be easily learnt by inexperienced veterinarians, expanding its applicability.
• The ultrasound-guided injection technique can be employed in the field with a high level of accuracy using commonly available equipment. It provides a practical approach to the treatment and study of joint diseases in horses.