Effect on success of stone-skin distance in CT and HU Hounsfield unite for ESWL performed renal pelvis stones

Abstract

Objective: We aimed to investigate the effect on success of stone-skin distance in CT Computed Tomography and HU Hounsfield units for ESWL performed renal pelvis stones. Material and Methods: Between the dates of January 1, 2011 and December 31, 2012, we retrospectively evaluated 49 patients for ESWL performed renal pelvis stones that diameters are changing between 10mm to 15mm. Before ESWL treatment, non-contrast abdominal CT was taken, stone - skin distance, and Hounsfield units of stones were measured. Patients were evaluated after 3 sessions of ESWL. Stone-free rates after ESWL were evaluated in patients with radiographs.Results: 49 patients, mean age 45.2 ± 15.7, included in the study, the mean BMI was 25.7 ± 3.5kg/m2. The mean stone size, stone-skin distance and stone density HU were measured respectively 117.5 ± 58.4 mm2, 10.5 ± 1.4cm and, 878.8 ± 370.4. The mean stone density was found to be a strong predictor value for stone treatment and higher stone density were found in the patients with residual stones p

Keywords

• Renal calculi, ESWL, Hounsfield, stone-to-skin distance

ESWL uygulanan renal pelvis taşlarında BT’ de taş-cilt mesafesi ve taşın HU Hounsfield Ünitesi değerinin başarıya etkisi

Abstract

Amaç: Günümüzde ESWL tedavisi planlanan renal pelvis taşlarında BT Bilgisayarlı Tomografi ’de taş ile cilt mesafesi ve taşın HU Hounsfield ünitesi değerinin ESWL sonrasında taşsızlık stone-free oranına etkisini araştırmayı amaçladık. Gereç ve Yöntemler: 1 Ocak 2011 ile 31 Aralık 2012 tarihleri arasında, çapları 10mm - 15mm arasında değişen renal pelvis taşı nedeniyle ESWL tedavisine yönlendirilen 49 hasta retrospektif olarak değerlendirildi. ESWL tedavisi öncesi çekilen kontrastsız batın BT’sinde taş - cilt mesafesi ve taşın Hounsfield ünitesi ölçümü yapıldı. 3 seans ESWL tedavisinin ardından hastalar değerlendirildi.. Her bir seans için hastalara ortalama 18 kv’de 2234 şok sayısı verildi. İki seans arası en az 7 gün olacak şekilde tedavileri planlandı. ESWL sonrası hastalarda taşsızlık oranları DÜS grafilerle değerlendirildi.Bulgular: Çalışmaya alınan 49 hastanın ortalama yaşı 45,2±15.7yıl, ortalama BMI 25,7±3.5kg/m2 idi. Ortalama taş boyutu 117,5±58,4 mm2, taş cilt mesafesi 10,5±1.4cm ve taş yoğunluğu HU 878,8±370.4 olarak tespit edildi. Taş cilt mesafesi ortalama 9,5±0,8cm’nin altında ve taş yoğunluğu ortalama 680±88,3 altında olan hastalarda n:30 tamamen taşsızlık sağlandığı izlendi. ESWL sonrası rest taşı kalan hastaların n:19 ortalama taş cilt mesafesi 11,5±1,3cm ve taş yoğunluğu 1210±220,6 olduğu izlendi. BMI, taş çapı, cilt-taş mesafesi ve taşın yoğunluğu tedavi başarısını etkileyen parametreler olarak tespit edildi. BMI ile cilt-taş mesafesi arasında positif korelasyon bulundu r=0.48, p

Keywords

• HU Hounsfield ünitesi,böbrek taşı,ESWL,taş-cilt mesafesi

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