Pressure-Volume Index-Based Volume Calculation Of Contrast Medium For Atlanto-Occipital Myelography In Dogs

Attila Arany-Tóth, Péter Csébi, Jeno A. Reiczigel, Tibor Németh

Research output: Contribution to journalArticle

3 Citations (Scopus)


Subarachnoid pressure recordings were made during atlanto-occipital myelography in 45 dogs with clinical signs of spinal disease. Iohexol was injected at a dosage of 0.3 ml/kg body weight and simultaneous pressure values were recorded in the cerebellomedullary cistern. The mean subarachnoid pressure was 9 ± 3 mmHg before and 70 ± 32 mmHg at the end of administration. From the pressure change induced by the volume load, the pressure-volume index (PVI) of the subarachnoid space was calculated and found to be in close correlation with body weight and the crown-rump length (r = 0.94 and 0.87). Using the estimated PVI values, the appropriate volume of contrast medium can be calculated for an animal according to body weight. Dogs of a large body size require relatively less contrast medium than small-sized dogs (range 0.17-0.35 ml/kg). This calculated volume is unlikely to increase the subarachnoid pressure above 40 mmHg as a specific pressure limit. Using these data, simplified recommendations for the choice of contrast medium volumes have been generated.

Original languageEnglish
Pages (from-to)430-436
Number of pages7
JournalVeterinary Radiology and Ultrasound
Issue number4
Publication statusPublished - Jul 1 2012



  • Contrast
  • Myelography
  • Pressure-volume index

ASJC Scopus subject areas

  • veterinary(all)

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