Ultrasound-guided versus blind technique for CSF puncture in dogs: a cadaveric study

Conference (2012)

ULTRASONOGRAPHIC APPEARANCE OF THE CISTERNA CHYLI IN THE DOG

Poster (2011)

Introduction/Aims The cisterna chyli (CC) is a dilated and bipartite portion of the lymphatic channels coursing intimately along the abdominal aorta in the retroperitoneal space.1 The appearance of the CC ... [more ▼]

Introduction/Aims The cisterna chyli (CC) is a dilated and bipartite portion of the lymphatic channels coursing intimately along the abdominal aorta in the retroperitoneal space.1 The appearance of the CC of the dog has been described on magnetic resonance imaging.2 The aim of this poster is to describe the ultrasonographic appearance of the CC in 2 dogs with chylous ascitis and in 2 healthy dogs. Methods Abdominal ultrasonography was realised with a 7.5MHz microconvex transducer. A right or left lateral dorsal approach was used. The aorta (together with the cranial mesenteric artery in normal dogs) was used as the main landmark to localize the CC. The dogs with chylous ascites were a 4 year old female american cocker spaniel, with immune-mediated hemolytic anemia and thrombocytopenia and a 1 year old, spayed female whippet with recurrent pancreatitis. The 2 healthy dogs were a 7 year old Beagle and a 9 year old Jack Russell. The abdominal ultrasonography was realised within 2 hours after the meal in the healthy dogs. Results The CC was seen as a hypoechoic structure, without detectable flow, dorsal and to the right of the aorta. The CC was easily visible in the 2 dogs with chyloabdomen while it was more difficult to localize in the healthy dogs. The CC was tubular on the longitudinal images. On transverse images, the CC is elliptic or semilunar and may partially surround the aorta. The maximal width of the CC measured on transverse images varied from 2-3mm in the 2 healthy dogs to 4-8mm in the 2 dogs with chyloabdomen. In 3 patients some efferent/afferent lymphatic vessels were seen as thin hypoechoic tubes converging on the CC. Shape and size of the CC in the same animal were seen varying during the same ultrasonography or between different exams. Discussion/Conclusion The CC is visible by ultrasonography in dogs. Its visibility depends on different conditions like disease of the lymphatic system3, quality and distance of the meal. [less ▲]

Mise au point d'une technique échoguidée pour la réalisation des ponctions lombaires chez le chien

Master of advanced studies dissertation (2010)

SUMMARY Subarachnoid lumbar puncture is commonly used in the dog for diagnostic reasons: cerebrospinal fluid collection and/or execution of a myelography. This work is based on 2 studies. The first study ... [more ▼]

SUMMARY Subarachnoid lumbar puncture is commonly used in the dog for diagnostic reasons: cerebrospinal fluid collection and/or execution of a myelography. This work is based on 2 studies. The first study has established the percutaneous sonographic anatomy of the lumbar region in the dog with ex-vivo (2 cadavers) and then in-vivo (4 dogs) experiences, and has compared sonographic images with anatomic frozen sections. With the help of sonographic landmarks established in study 1, the second study, has developed an ultrasonographic-guided technique to introduce a spinal needle in the subarachnoid lumbar space on 2 cadavers. Then, this procedure has been used in 5 anesthetized dogs. The sonographic anatomy of the lumbar region has been established by means of transverse and longitudinal (sagittal and parasagittal) images, highlighting bony structures as spinous processes, the floor of the vertebral canal and articular processes. The ultrasonographic-guided technique has been developed using the contiguous articular facets of the fifth and sixth lumbar vertebrae as anatomical landmarks on a parasagittal image. The sonographic identification of the lumbar bony structures depends on 2 main factors: the morphology of the dog and the operator. These factors need to be further evalued to assess the applicability of this ultrasonographic-guided procedure in veterinary practice. Key words: ultrasonography, dog, lumbar puncture, myelography, spinal needle [less ▲]

Radiography and computed tomography of snake's lungs

Poster (2010)