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Linear foreign bodies O P E E R - R E V I E W E D and serosa are usually easily seen with ultrasonography as adjacent layers) may be associated with perforation.21 In this case, the presence of linear echogenic material within Using the most accurate, least invasive diagnostic imaging technique is imperative for optimizing care. the stomach and extending into the small intestine, with associated plication, was recognized as linear foreign material without evidence of GI perforation. CONCLUSION All abdominal radiographic views, including right lateral, left lateral, and ventrodorsal, are important in identifying foreign material in the GI tract. The main goal of placing patients in these different positions is to use intestinal gas as negative contrast to localize the foreign body. It is important to distinguish the normal location of air and fluid in every view. When an isolated organ evaluation is needed, compression radiography is an inexpensive and easy technique. Positive contrast studies provide useful information regarding the location and the degree of the obstruction and should be used in small-animal practice. Ultrasonographic evaluation provides information about the shape and position of the stomach or bowel and the presence of intraluminal structures, as well as the ability to measure bowel wall thickness and evaluate intestinal wall layers. Typical intestinal shapes associated with linear foreign bodies, intussusceptions, and other kinds of foreign materials have been described elsewhere. 1 Using the most accurate, least invasive diagnostic imaging technique is imperative for optimizing care in patients with linear foreign bodies. Additional studies are indicated when the diagnosis is uncertain with survey radiography. It will not be necessary to perform all of these techniques in every patient. O REFERENCES 1. Bebchuk TN. Feline gastrointestinal foreign bodies. Vet Clin North Am Small Anim Pract 2002;32:861-880. 2. Burk RL, Ackerman N. The abdomen. In: Small animal radiology and ultrasonography: a diagnostic atlas and text. 2nd ed. Philadelphia, Pa: WB Saunders Co, 1996;215-426. 3. Bowlus RA, Biller DS, Ambrust LJ, et al. Clinical utility of pneumogastrography in dogs. J Am Anim Hosp Assoc 2005;41:171-178. 4. Riedesel EA. The small bowel. In: Thrall DE, ed. Textbook of veterinary diagnostic radiology. Philadelphia, Pa: WB Saunders Co, 2002;639-660. 5. Ljunggren G. The radiological diagnosis of some acute abdominal disorders in the dog. J Am Vet Radiol Soc 1964;5:5-14. 6. Root CR, Lord PF. Linear radiolucent gastrointestinal foreign bodies in cats and dogs: their radiographic appearance. J Am Vet Radiol Soc 1971;12:45-53. 7. Farrow CS. Radiographic characterization of gastric foreign material in a dog. Mod Vet Pract 1986;67:716-718. 8. Ticer JW. The abdomen. In: Ticer JW, ed. Radiographic technique in veterinary practice. 2nd ed. Philadelphia, Pa: WB Saunders Co, 1984;312-325. 9. Armbrust LJ, Biller DS, Hoskinson JJ. Case examples demonstrating the clinical utility of obtaining both right and left lateral abdominal radiographs in small animals. J Am Anim Hosp Assoc 2000;36:531-536. 10. Root CR. Interpretation of abdominal survey radiographs. Vet Clin North Am 1974;4:763-803. 11. Armbrust LJ, Biller DS, Hoskinson JJ. Compression radiography: An old technique revisited. J Am Anim Hosp Assoc 2000;36:537-541. 12.Farrow CS. Abdominal compression radiography in the dog and cat. J Am Anim Hosp Assoc1978;14:337-342. 13. Carrig CB, Mostosky UV. The use of compression in abdominal radiography of the dog and cat. J Am Anim Hosp Assoc 1976;17:178-181. 14. Mahaffey MB, Barber DL. The stomach. In: Thrall DE, ed. Textbook of veterinary diagnostic radiology. 4th ed. Philadelphia, Pa: WB Saunders Co, 2002;615-638. 15. Wallack ST. Handbook of veterinary contrast radiography. Solana Beach, Calif: San Diego Veterinary Imaging Inc, 2003;1-27. 16. Williams J, Biller D, Miyabayashi T, et al. Evaluation of iohexol as a gastrointestinal contrast medium in normal cats. Vet Radiol Ultrasound 1993;34:310. 17. Moon ML, Biller DS, Armbrust LJ. Ultrasonographic appearance and etiology of corrugated small intestine. Vet Radiol Ultrasound 2003;44:199-203. 18. Lamb CR. Recent developments in diagnostic imaging of the gastrointestinal tract of the dog and cat. Vet Clin North Am Small Anim Pract 1999;29:307-342. 19. Tidwell AS, Penninck DG. Ultrasonography of gastrointestinal foreign bodies. Vet Radiol Ultrasound 1992;33:160-169. 20. Tyrrell D, Beck C. Survey of the use of radiography vs. ultrasonography in the investigation of gastrointestinal foreign bodies in small animals. Vet Radiol Ultrasound 2006;47:404-408. 21. Boysen SR, Tidwell AS, Penninck DG. Ultrasonographic findings in dogs and cats with gastrointestinal perforation. Vet Radiol Ultrasound 2003;44:556-564. 526 August 2007 VETERINARY MEDICINE

Table of Contents Feed for the Digital Edition of Veterinary Medicine - August 2007

Contents A Veterinary Medicine Interview Veterinary Voices Idea Exchange Diagnosis and Treatment of Solar Dermatitis in Dogs Diagnostic Imaging for Linear Foreign Bodies in Cats Overcoming the Diagnostic and Therapeutic Challenges of Canine Immune-Mediated Thrombocytopenia Ophthalmic drugs: What’s new? CE Form Product Preview Advertiser Index Marketplace/Classifieds Mind Over Miller

Veterinary Medicine - August 2007

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