Distribution of contrast medium epidurally injected at thoracic and lumbar vertebral segments.

The epidural distribution of iohexol (0.2 ml/kg) administered at thoracic vertebrae (Thoracic group) and lumbar vertebrae (Lumbar group) was compared by computed tomographic (CT) epidurography in dogs. The total spread of iohexol was similar between the 2 groups upon reaching a similar cranial level. The maximal CT values were higher at the C7/T1 and T4/T5 levels in Thoracic group, but they were higher at the T13/L1 and L4/L5 levels in Lumbar group (P<0.05). This result suggests that the distribution pattern of the drug administered epidurally at thoracic vertebrae and lumbar vertebrae is different in dogs.

[1]  M. Mochizuki,et al.  Comparison of feasibility and safety of epidural catheterization between cranial and caudal lumbar vertebral segments in dogs. , 2011, The Journal of veterinary medical science.

[2]  M. Mochizuki,et al.  Epidural spread of iohexol following the use of air or saline in the 'loss of resistance' test. , 2010, Veterinary anaesthesia and analgesia.

[3]  J. M. S. Losada,et al.  Anestesia combinada general-epidural versus anestesia general, morbimortalidad y eficacia analgésica en cirugía toracoabdominal. Revisión sistemática-metaanálisis , 2008 .

[4]  Yong Chul Kim,et al.  The Influence of Neck Flexion and Extension on the Distribution of Contrast Medium in the High Thoracic Epidural Space , 2007, Anesthesia and analgesia.

[5]  M. Hanazaki,et al.  Correlation between the Distribution of Contrast Medium and the Extent of Blockade during Epidural Anesthesia , 2004, Anesthesiology.

[6]  Anthony Rodgers,et al.  Reduction of postoperative mortality and morbidity with epidural or spinal anaesthesia: results from overview of randomised trials , 2000, BMJ : British Medical Journal.

[7]  T. Duke.  Local and regional anesthetic and analgesic techniques in the dog and cat: Part II, Infiltration and nerve blocks. , 2000, The Canadian veterinary journal = La revue veterinaire canadienne.

[8]  D. Dyson,et al.  Epidural analgesia and anesthesia. , 2000, The Veterinary clinics of North America. Small animal practice.

[9]  Y. C. Kim,et al.  Spreading pattern of epidurally administered contrast medium in rabbits , 1998, Acta anaesthesiologica Scandinavica.

[10]  Shigehito Sato,et al.  Changes of Epidurogram after Long-term Continuous Epidural Block , 1991 .

[11]  A. Schubert,et al.  Deliberate Epidural Air Injection in Dogs: A Radiographic Study , 1989, Regional Anesthesia & Pain Medicine.

[12]  A. Banning,et al.  Lumbar epidurography and epidural analgesia in cancer patients , 1989, Pain.

[13]  J. Egmond,et al.  Post‐operative analgesia by high thoracic epidural versus intramuscular nicomorphine after thoracotomy. Part III , 1987, Acta anaesthesiologica Scandinavica.

[14]  K. Am,et al.  Epidural analgesia in the dog and cat. , 1968 .

[15]  V. R. Ruiz García,et al.  [Combined general-epidural anesthesia compared to general anesthesia: a systematic review and meta-analysis of morbidity and mortality and analgesic efficacy in thoracoabdominal surgery]. , 2008, Revista espanola de anestesiologia y reanimacion.

[16]  L. Hall.  Chapter 15 – Anaesthesia of the dog , 2001 .

[17]  E. Länsimies,et al.  The effect of thoracic epidural analgesia on postoperative stress and morbidity. , 1987, Annales chirurgiae et gynaecologiae.