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Comparison of Blind, Ultrasound and Computed Tomographic-Guided Injection Techniques for Nerve Block of the Head in One-Humped Camel (Camelus dromedaries) Cadavers
 
El-Sayed El-Shafaey1,2,*, Mohamed Hamed3, Ahmed Abdellatif 4 and Eman Abo Elfadl5
 
1Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Mansoura University, Mansoura-city, Egypt; 2Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Qassim, Saudi Arabia; 3Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Aswan University, Aswan-city, Egypt; 4Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Mansoura University, Mansoura-city, Egypt; 5Department of animal husbandry and development of animal wealth, Faculty of Veterinary Medicine, Mansoura University, Mansoura-city, Egypt
*Corresponding author: sayedelshafaey@yahoo.com
 

Abstract   

The present study was designed to assess the efficacy of ultrasound (US) and computed tomographic (CT)-guided injection techniques versus conventional blind technique for various nerve blocks of the head in one-humped camel cadavers. Eighteen cadaver heads of adult one-humped camels enrolled were randomly assigned to blind (n=6), US-guided (n=6), and CT-guided (n=6) injections of mental, infraorbital, supraorbital and retrobulbar nerves. Injections were made with 2.5 mL of lidocaine HCl mixed with equal volume of Iopaminol contrast agent. Injection criteria (needle localization, correct penetration, difficulty of injection and performance time) were assessed, scored and statistically compared among three techniques of injection. Collectively, the summation of injection criteria scores showed a significant increase (P<0.05) in the US and CT-guided nerve block injection techniques compared with the blind technique. Imaging-guided injection could precisely discriminate each target nerve (sensitivity: 72.2-94.4%; specificity: 27.8-83.3%; odds ratio: 6.5-85; confidence interval: 15.03-389; P<0.0001). The highest specificity for imaging-guided nerve block injection technique was 83.3% for US and CT-guided techniques, whilst the lowest specificity was recorded for CT versus US-guided technique (27.8%). In conclusion, the US and CT-guided injection techniques offers considerable advantages for characterization of the anatomical landmarks, needle placement and selectivity of the head nerve block technique which is difficult to obtained using conventional blind technique.

Key words: Camel, Computed tomography, Imaging, Nerve block, Ultrasonography

 
   

ISSN 0253-8318 (Print)
ISSN 2074-7764 (Online)



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