2352 patients 05 with normal ultrasound required

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2/352 patients (0.5%) with normal ultrasound required urologic intervention. 27/418 patients (6%) with ultrasound indicative of ureterolithiasis required intervention. Patients with suspected renal colic who had a normal ultrasound very rarely required urological intervention. 148 Diagnostic ultrasound Renal and bladder ultrasound
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an initial point-of-care screening test should assess the safety of this diagnostic strategy for patients and contrast that with cost and radiation exposure for traditional imaging strategies. References 1. Colistro R, Torreggiani WC, Lyburn ID, et al. Unenhanced helical CT in investigation of acute flank pain. Clin Radiol 2002; 57 : 435–51. 2. Sheafor DH, Hertzberg BS, Freed KS, et al. Nonenhanced helical CT and US in the emergency evaluation of patients with renal colic: prospective comparison. Radiology 2000; 217 : 792–7. 3. Fowler KA, Locken JA, Duchesne JH, Williamson MR. US for detecting renal calculi with nonenhanced CT as a reference standard. Radiology 2002; 222 : 109–13. 4. Smith RC, Verga M, McCarthy S, Rosenfield AT. Diagnosis of acute flank pain: value of unenhanced helical CT. AJR Am J Roentgenol 1996; 166 : 97–101. 5. Mandavia DP, Aragona J, Chan L, Chan D, Henderson SO. Ultrasound training for emergency physicians: a prospective study. Acad Emerg Med 2000; 7 : 1008–14. 6. Gaspari RJ, Horst K. Emergency ultrasound and urinalysis in the evalu- ation of flank pain. Acad Emerg Med 2005; 12 : 1180–4. 7. Gochman RF, Karasic RB, Heller MB. Use of portable ultrasound to assist urine collection by suprapubic aspiration. Ann Emerg Med 1991; 20 : 631–5. 8. Kiernan SC, Pinckert TL, Keszler M. Ultrasound guidance of suprapubic bladder aspiration in neonates. J Pediatr 1993; 123 : 789–91. 9. Kiely EA, Hartnell GG, Gibson RN, Williams G. Measurement of bladder volume by real-time ultrasound. Br J Urol 1987; 60 : 33–5. 10. Roehrborn CG, Peters PC. Can transabdominal ultrasound estimation of postvoiding residual replace catheterization? Urology 1988; 31 : 445–9. 11. Ireton RC, Krieger JN, Cardenas DD, et al. Bladder volume determin- ation using a dedicated, portable ultrasound scanner. J Urology 1990; 143 : 909–11. 12. Chan H. Noninvasive bladder volume measurement. J Neurosci Nurs 1993; 25 : 309–12. 13. Cronan JJ. Urinary obstruction. In Grainger RG, Allison DJ, Adam A, Dixon AK (ed.), Diagnostic Radiology: a Textbook of Medical Imaging , 4th edn. London: Churchill Livingstone; 1997: 1593–613. 14. Kawashima A, LeRoy AJ. Radiologic evaluation of patients with renal infections. Infect Dis Clin North Am 2003; 17 : 433–56. 15. Edmonds ML, Yan JW, Sedran RJ, McLeod SL, Theakston KD. The utility of renal ultrasonography in the diagnosis of renal colic in emergency department patients. CJEM 2010; 12 : 201–6. Diagnostic ultrasound 149 Renal and bladder ultrasound
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16. Mandavia DP, Pregerson B, Henderson SO. Ultrasonography of flank pain in the emergency department: renal cell carcinoma as a diagnostic concern. J Emerg Med 2000; 18 : 83–6.
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