Journal of Veterinary Science

The Korean Society of Veterinary Science (대한수의학회)
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Computed tomographic assessment of retrograde urohydropropulsion in male dogs and prediction of stone composition using Hounsfield unit in dogs and cats

  • Bruwier, Aurelie (Imaging diagnostic department, Centre Hospitalier Veterinaire (Chv) Pommery) ;
  • Godart, Benjamin (Surgery department, Centre Hospitalier Veterinaire (Chv) Pommery) ;
  • Gatel, Laure (Imaging diagnostic department, Centre Hospitalier Veterinaire (Chv) Pommery) ;
  • Leperlier, Dimitri (Surgery department, Centre Hospitalier Veterinaire (Chv) Pommery) ;
  • Bedu, Anne-Sophie (Imaging diagnostic department, Centre Hospitalier Veterinaire (Chv) Pommery)
  • Received : 2022.04.17
  • Accepted : 2022.06.28
  • Published : 2022.09.30
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Abstract

Background: Persistent uroliths after a cystotomy in dogs are a common cause of surgical failure. Objectives: This study examined the following: the success rate of retrograde urohydropropulsion in male dogs using non-enhanced computed tomography (CT), whether the CT mean beam attenuation values in Hounsfield Units (mHU) measured in vivo could predict the urolithiasis composition and whether the selected reconstruction kernel may influence the measured mHU. Methods: All dogs and cats that presented with lower urinary tract uroliths and had a non-enhanced CT preceding surgery were included. In male dogs, CT was performed after retrograde urohydropropulsion to detect the remaining urethral calculi. The percentage and location of persistent calculi were recorded. The images were reconstructed using three kernels, from smooth to ultrasharp, and the calculi mHU were measured. Results: Sixty-five patients were included in the study. The success rate of retrograde urohydropropulsion in the 45 male dogs was 55.6% and 86.7% at the first and second attempts, respectively. The predominant components of the calculi were cystine (20), struvite (15), calcium oxalate (8), and urate (7). The convolution kernel influenced the mHU values (p < 0.05). The difference in mHU regarding the calculus composition was better assessed using the smoother kernel. A mHU greater than 1,000 HU was predictive of calcium oxalate calculi. Conclusions: Non-enhanced CT is useful for controlling the success of retrograde urohydropropulsion. The mHU could allow a prediction of the calculus composition, particularly for calcium oxalate, which may help determine the therapeutic strategy.

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References

  1. Hotston Moore A. The bladder and urethra. In: O'brien R, Barr F, editors. BSAVA Manual of Canine and Feline Abdominal Imaging. 1st ed. Quedgeley: John Wiley & Sons Inc; 2009, 205-221.
  2. Marolf AJ. Urinary bladder. In: Thrall DE, editor. Textbook of Veterinary Diagnostic Radiology. 7th ed. Missouri: Saunders; 2018, 846-864.
  3. Weichselbaum RC, Feeney DA, Jessen CR, Osborne CA, Dreytser V, Holte J. Urocystolith detection: comparison of survey, contrast radiographic and ultrasonographic techniques in an in vitro bladder phantom. Vet Radiol Ultrasound. 1999;40(4):386-400. https://doi.org/10.1111/j.1740-8261.1999.tb02131.x
  4. Lulich JP, Berent AC, Adams LG, Westropp JL, Bartges JW, Osborne CA. ACVIM small animal consensus recommendations on the treatment and prevention of uroliths in dogs and cats. J Vet Intern Med. 2016;30(5):1564-1574. https://doi.org/10.1111/jvim.14559
  5. Osborne CA, Lulich JP, Polzin DJ. Canine retrograde urohydropropulsion. Lessons from 25 years of experience. Vet Clin North Am Small Anim Pract. 1999;29(1):267-281, xiv. https://doi.org/10.1016/S0195-5616(99)50015-6
  6. Lulich JP, Osborne CA, Polzin D. Incomplete removal of canine and feline urocystoliths by cystotomy. J Vet Intern Med. 1993;7:124.
  7. Bevan JM, Lulich JP, Albasan H, Osborne CA. Comparison of laser lithotripsy and cystotomy for the management of dogs with urolithiasis. J Am Vet Med Assoc. 2009;234(10):1286-1294. https://doi.org/10.2460/javma.234.10.1286
  8. Grant DC, Harper TA, Werre SR. Frequency of incomplete urolith removal, complications, and diagnostic imaging following cystotomy for removal of uroliths from the lower urinary tract in dogs: 128 cases (1994- 2006). J Am Vet Med Assoc. 2010;236(7):763-766. https://doi.org/10.2460/javma.236.7.763
  9. Mitcheson HD, Zamenhof RG, Bankoff MS, Prien EL. Determination of the chemical composition of urinary calculi by computerized tomography. J Urol. 1983;130(4):814-819. https://doi.org/10.1016/S0022-5347(17)51472-X
  10. Testault I, Gatel L, Vanel M. Comparison of nonenhanced computed tomography and ultrasonography for detection of ureteral calculi in cats: a prospective study. J Vet Intern Med. 2021;35(5):2241-2248. https://doi.org/10.1111/jvim.16210
  11. Basha MA, AlAzzazy MZ, Enaba MM. Diagnostic validity of dual-energy CT in determination of urolithiasis chemical composition: in vivo analysis. Egypt J Radiol Nucl Med. 2018;49(2):499-508. https://doi.org/10.1016/j.ejrnm.2017.12.018
  12. Bonatti M, Lombardo F, Zamboni GA, Pernter P, Pycha A, Mucelli RP, et al. Renal stones composition in vivo determination: comparison between 100/Sn140 kV dual-energy CT and 120 kV single-energy CT. Urolithiasis. 2016;8:1-7.
  13. Nakada SY, Hoff DG, Attai S, Heisey D, Blankenbaker D, Pozniak M. Determination of stone composition by noncontrast spiral computed tomography in the clinical setting. Urology. 2000;55(6):816-819. https://doi.org/10.1016/S0090-4295(00)00518-5
  14. Pressler BM, Mohammadian LA, Li E, Vaden SL, Levine JF, Mathews KG, et al. In vitro prediction of canine urolith mineral composition using computed tomographic mean beam attenuation measurements. Vet Radiol Ultrasound. 2004;45(3):189-197. https://doi.org/10.1111/j.1740-8261.2004.04032.x
  15. Nykamp SG. Dual-energy computed tomography of canine uroliths. Am J Vet Res. 2017;78(10):1150-1155. https://doi.org/10.2460/ajvr.78.10.1150
  16. Byeon YE, Lee ST, Kweon OK, Kim WH. The diameter of maximum distended urethra in male dogs. J Vet Clin. 2009;26(4):331-335.
  17. Thiel C, Haussler TC, Kramer M, Tacke S. Urethrolithiasis in the dog - a retrospective evaluation of 83 male dogs. Tierarztl Prax Ausg K Klientiere Heimtiere. 2019;47(6):394-401. https://doi.org/10.1055/a-1020-3359
  18. Michalski AS, Edwards WB, Boyd SK. The influence of reconstruction kernel on bone mineral and strength estimates using quantitative computed tomography and finite element analysis. J Clin Densitom. 2019;22(2):219-228. https://doi.org/10.1016/j.jocd.2017.09.001
  19. Mackin D, Ger R, Gay S, Dodge C, Zhang L, Yang J, et al. Matching and homogenizing convolution kernels for quantitative studies in computed tomography. Invest Radiol. 2019;54(5):288-295. https://doi.org/10.1097/RLI.0000000000000540
  20. Ivanov DV, Kirillova IV, Kossovich LY, Bessonov LV, Petraikin AV, Dol AV, et al. Influence of convolution Kernel and beam-hardening effect on the assessment of trabecular bone mineral density using quantitative computed tomography. Izv Saratov Univ Math Mech Inform. 2020;20(2):205-219. https://doi.org/10.18500/1816-9791-2020-20-2-205-219
  21. Kopecny L, Palm CA, Segev G, Westropp JL. Urolithiasis in dogs: Evaluation of trends in urolith composition and risk factors (2006-2018). J Vet Intern Med. 2021;35(3):1406-1415. https://doi.org/10.1111/jvim.16114
  22. Kopecny L, Palm CA, Segev G, Larsen JA, Westropp JL. Urolithiasis in cats: Evaluation of trends in urolith composition and risk factors (2005-2018). J Vet Intern Med. 2021;35(3):1397-1405. https://doi.org/10.1111/jvim.16121