INTRODUCTION: We assessed differences in results of stone analyses on subsequent sampling. METHODS: A retrospective review of patients with stone analyses at a tertiary stone centre between March 2006 and July 2012 was performed. All stones were analyzed at a centralized laboratory using infrared spectroscopy. Patients were grouped according to the first predominant stone type on record, as defined by the predominant stone component of at least 60%. Stone groups included calcium oxalate (CaOx), calcium phosphate (CaP), uric acid (UA), cystine, struvite, mixed CaOx-CaP and mixed CaOx-UA. All patients had a full metabolic stone workup. RESULTS: Of the 303 patients with stone analyses, 118 (38.9%) patients had multiple stone analyses. The mean age was 53.4 ± 15.1 years, and 87 (73.7%) were males. Of the 118, the initial stone analysis showed 43 CaOx, 38 CaP, 21 UA, 4 CaOx-CaP, 2 CaOx-UA, 6 cystine, and 4 struvite. There was a different stone composition in 25 (21.2%) patients with a median time delay of 64.5 days. Different compositions were found in 7 CaOx (to 3 CaP, 2 CaOx-CaP, and 2 UA), 5 CaP (to 3 CaOx and 2 CaOx-CaP), 3 UA (to 3 CaOx), 4 CaOx-CaP (to 2CaOx, 1 UA and 1 CaP), 2 CaOx-UA (to 2 CaOx) and 4 struvite (to 3 CaP and 1 UA). CONCLUSIONS: Stone composition was different in 21.2% of patients on subsequent analyses.
INTRODUCTION: We assessed differences in results of stone analyses on subsequent sampling. METHODS: A retrospective review of patients with stone analyses at a tertiary stone centre between March 2006 and July 2012 was performed. All stones were analyzed at a centralized laboratory using infrared spectroscopy. Patients were grouped according to the first predominant stone type on record, as defined by the predominant stone component of at least 60%. Stone groups included calcium oxalate (CaOx), calcium phosphate (CaP), uric acid (UA), cystine, struvite, mixed CaOx-CaP and mixed CaOx-UA. All patients had a full metabolic stone workup. RESULTS: Of the 303 patients with stone analyses, 118 (38.9%) patients had multiple stone analyses. The mean age was 53.4 ± 15.1 years, and 87 (73.7%) were males. Of the 118, the initial stone analysis showed 43 CaOx, 38 CaP, 21 UA, 4 CaOx-CaP, 2 CaOx-UA, 6 cystine, and 4 struvite. There was a different stone composition in 25 (21.2%) patients with a median time delay of 64.5 days. Different compositions were found in 7 CaOx (to 3 CaP, 2 CaOx-CaP, and 2 UA), 5 CaP (to 3 CaOx and 2 CaOx-CaP), 3 UA (to 3 CaOx), 4 CaOx-CaP (to 2CaOx, 1 UA and 1 CaP), 2 CaOx-UA (to 2 CaOx) and 4 struvite (to 3 CaP and 1 UA). CONCLUSIONS: Stone composition was different in 21.2% of patients on subsequent analyses.
Authors: Michael Ordon; Sero Andonian; Brian Blew; Trevor Schuler; Ben Chew; Kenneth T Pace Journal: Can Urol Assoc J Date: 2015-12-14 Impact factor: 1.862
Authors: Naeem Bhojani; Jennifer Bjazevic; Brendan Wallace; Linda Lee; Kamaljot S Kaler; Marie Dion; Andrea Cowan; Nabil Sultan; Ben H Chew; Hassan Razvi Journal: Can Urol Assoc J Date: 2022-06 Impact factor: 2.052
Authors: Prince Singh; Felicity T Enders; Lisa E Vaughan; Eric J Bergstralh; John J Knoedler; Amy E Krambeck; John C Lieske; Andrew D Rule Journal: Mayo Clin Proc Date: 2015-09-06 Impact factor: 7.616