Menu
Menu
19 Harley St, London, W1G 9QJ, UK

Comparison of three ultrasound guided approaches to the lumbar plexus in dogs: a cadaveric study.

Related Articles

Comparison of three ultrasound guided approaches to the lumbar plexus in dogs: a cadaveric study.

Vet Anaesth Analg. 2014 Sep 4;

Authors: Graff SM, Wilson DV, Guiot LP, Nelson NC

Abstract
OBJECTIVE: To assess the accuracy of contrast material injection and the dispersion of injectate following ultrasound guided injections at the level of L6 and L7, in canine cadavers.
STUDY DESIGN: Prospective, randomized, experimental study.
ANIMALS: Twenty nine mixed breed canine cadavers (28.9 ± 6.0 kg).
METHODS: Three ultrasound-guided approaches to the lumbar plexus (LP) were compared: 1) a dorsal pre-iliac approach at the level of L6; 2) a lateral paravertebral approach at mid-L6; and 3) a lateral paravertebral approach at mid-L7. An isovolumic mixture of iodine-based contrast with new methylene blue (0.1 mL kg(-1) ) was injected bilaterally in the juxta-foraminal region along the L6 or L7 nerve root. Computed tomography was performed followed by segmentation and 3D reconstruction of the lumbar spine and contrast material volumes using dedicated software. Distances between contrast material and the fifth through seventh lumbar foraminae, and length of femoral (FN) and obturator (ON) nerve staining were measured and compared between approaches (p < 0.05).
RESULTS: Injectate moved cranial and caudal to the site of injection, and dispersed into an ovoid shape between the quadratus lumborum, iliopsoas and psoas minor muscles. Injections at L7 resulted in significantly closer contrast proximity to the L6 and L7 foraminae (p < 0.001). Femoral nerve staining was similar for all approaches, ON staining was more consistent after L7 injections (p < 0.001).
CONCLUSION AND CLINICAL RELEVANCE: An ultrasound-guided lateral paravertebral approach to the LP proved very practical and accurate, with easy visualization of the plexus and associated nerves. To ensure that the ON is covered by injectate, an approach at the level of L7 is recommended. Further studies are necessary to determine if this correlates with clinically effective local anesthesia.

PMID: 25185566 [PubMed – as supplied by publisher]

Share to care...

Share on facebook
Facebook
Share on twitter
Twitter
Share on pinterest
Pinterest
Share on google
Google+
Share on linkedin
LinkedIn
Share on skype
Skype

What we do...

The Harley Street Hospital

Testimonials

What is London spine unit and How it Works

The London Spine Unit was established in 2005 and has successfully treated over 5000 patients. All conditions are treated.

We treat all spinal disorders

The London Spine Unit specialises in Minimally Invasive Treatments allowing rapid recovery and return to normal function

Trusted by patients worldwide

The London Spine Unit provides the highest quality care to all patients and has VIP services for those seeking exceptional services

What our patients say about us ......

Paraspinal atrophy

I was very impressed with the consultation and diagnosis I received at the Hospital. The treatment (injection into the spine) did help but not as

Read More »