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A Kmetec

Publications and source records attributed to A Kmetec.

11 recordsLinked to original sources
PubMed2003

Xanthogranulomatous pyelonephritis in nonfunctioning transplanted kidney.

Xanthogranulomatous pyelonephritis in native and allografted kidneys is a rare variant of severe chronic infection of the renal parenchyma. In a native kidney the diagnosis may sometimes be established by ultrasonography and computed tomography. In the renal allograft, the diagnosis could only be established by histologic evaluation of the transplant biopsy or nephrectomy. The reported case presents a febrile patient with a failing renal graft, in whom xanthogranulomatous pyelonephritis was established by histologic evaluation of transplantectomy specimens. Xanthogranulomatous pyelonephritis should therefore be included in the list of possible etiologies of the fever in patient with nonfunctioning transplanted kidney.

Cadaver↗
PubMed2002

Time-dependent changes of resistive index in acute renal obstruction during nonsteroidal drug administration.

OBJECTIVE: To evaluate Doppler ultrasonography (DUS) and assess time-dependent changes of the renal resistive index (RI) in acute unilateral renal obstruction during treatment with nonsteroidal analgesic for the relief of renal colic. PATIENTS AND METHODS: In 31 patients with symptoms of renal colic, treated with ketoprofen, unilateral obstruction was confirmed by intravenous urography. The patients were divided into four groups according to the duration of their symptoms, i.e. < 23 h, 24-47 h, 48-72 h and > 72 h. In each patient, the RI was measured over the arcuate, segmental and renal arteries of both kidneys using DUS. The values obtained in the obstructed kidney were compared with those for the contralateral kidney. RESULTS: The mean (sd) RIs for all 31 patients were 0.71 (0.05) for the obstructed and 0.60 (0.05) for the contralateral kidney (P < 0.001), the mean difference (dRI) being 0.12 (0.07). In those with obstruction for < 23 h the mean RI of the obstructed kidney was 0.70 (0.05) and of the contralateral healthy one 0.62 (0.07). Values of RI were similar in the group with obstruction for 24-47 h and 48-71 h. In those with obstruction for > 72 h the mean RI of the obstructed kidney was 0.69 (0.07) and of the contralateral one 0.60 (0.04), with a dRI of 0.09 (P < 0.005). The RI was 87% sensitive and 90% specific for detecting renal obstruction. CONCLUSION: Although the patients were given ketoprofen, their mean RI for the obstructed kidney remained above the discriminatory threshold (> 0.70) during the first 71 h of obstruction. Only in those obstructed for > 72 h was the mean RI on the obstructed side slightly below the threshold, but the difference between the kidneys was significant. The measurement of RI is a reliable diagnostic method for detecting acute renal obstruction. With a longer duration of symptoms, the difference in RI between the kidneys becomes clinically more relevant.

Acute Disease↗
PubMed2001

Contrast-enhanced ultrasound voiding cystography as a screening examination for vesicoureteral reflux in the follow-up of renal transplant recipients: a new approach.

BACKGROUND: The aim of the study was to evaluate a new diagnostic procedure, ultrasound contrast-enhanced voiding cystography (USVC), for vesicoureteral reflux (VUR) in renal transplant recipients and to compare it with radionuclide voiding cystography (RVC). METHODS: Twenty-three renal transplant recipients with recurrent urinary tract infection were investigated simultaneously by RVC and USVC. After catheterization, the empty bladder was filled with normal saline (mean 250+/-30 ml) and 30-45 mBq of (99m)Tc-labelled colloid. At the end of filling the bladder, 19.5 ml of galactose-based, microbubble-containing echo-enhancing agent, at a concentration of 200 mg/ml, was instilled. During the filling and voiding phases the movement of the radiotracer was recorded by a gamma camera and the presence of microbubbles in the urinary tract by ultrasound. RVC was used to detect and grade the degree of VUR. RESULTS: Nuclear studies identified VUR in 16 (69.6%) of 23 recipients with recurrent urinary tract infection: VUR grade I in three (13%) recipients, grade II in eight (34.8%) and grade III in five (21.7%) using a simplified grading system. USVC with contrast-enhancement detected VUR in 14 (60.9%) recipients. Overall sensitivity and specificity of contrast-enhanced USVC was 75 and 71%, respectively. Statistical analysis showed that the accuracy of this procedure increased with higher grades of VUR and its sensitivity reached 100% for detection of VUR grade III. CONCLUSION: In our preliminary study, contrast-enhanced USVC has proved to be an effective examination, with the same accuracy rate as RVC in detecting grade III VUR episodes with low diagnostic accuracy for low reflux grades.

Adult↗
PubMed2000

Birth after treatment of a male with seminoma and azoospermia with cryopreserved-thawed testicular tissue.

The case of an infertile couple in which a testicular seminoma and azoospermia were discovered in the husband during infertility treatment is described. A small piece of testicular tissue, obtained by biopsy from the healthy testis [testicular sperm extraction (TESE)], was deep-frozen before oncology therapy was initiated. The patient's lymphocyte karyotype was normal and no Y microdeletions were found. After conclusion of oncology treatment, the tissue was thawed and successfully used in the intracytoplasmic sperm injection (ICSI) procedure. A healthy girl was born. Testicular tumours are known to impair fertility in the majority of patients, and fertility deteriorates further after cytotoxic and surgical oncology treatment. Until recently in Slovenia, for young oncology patients cryopreservation was applied only to high quality ejaculate fulfilling the criteria for intrauterine insemination or in-vitro fertilization after thawing. Failing that, the only remaining options were fertilization by donor spermatozoa or child adoption. New assisted reproductive technologies, of which the ICSI procedure is the most successful, are suitable for the treatment of only the most severe cases of male infertility. It is reasonable to cryopreserve even poor quality ejaculate prior to the oncology therapy, as well as testicular tissue in cases of azoospermia.

Adult↗
PubMed1998

Magnesium hydrogen carbonate natural mineral water enriched with K(+)-citrate and vitamin B6 improves urinary abnormalities in patients with calcium oxalate nephrolithiasis.

The influence of drinking magnesium hydrogen carbonate natural mineral water enriched with potassium citrate on urinary metabolic abnormalities was prospectively studied in 27 patients with recurrent calcium oxalate nephrolithiasis. The mean 24-hour urinary pH shifted from 6.34 to 6.93 (p < 0.01), the mean urinary magnesium/urinary creatinine ratio rose from 0.47 to 0.67 (p < 0.01), the mean urinary citrate/urinary creatinine ratio increased from 0.26 to 0.35 (p NS), and the mean 24-hour urinary calcium decreased from 7.98 to 6.05 mmol (p < 0.05). The effects of magnesium hydrogen carbonate natural mineral water enriched with potassium citrate were found to be favorable on urinary calcium, urinary magnesium/urinary creatinine ratio and urinary pH in patients with calcium oxalate nephrolithiasis.

Adult↗