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R Llarena

Publications and source records attributed to R Llarena.

6 recordsLinked to original sources
PubMed1992

In vitro lithotripsy with the Alexandrite laser.

The Alexandrite laser system has proven to be an effective and safe method of ureteral lithotripsy. Some authors have recently reported the risk of interspersion of fiber splinters into tissue during lithotripsy, when short pulses and high power densities are employed. In vitro lithotripsy on renal calculi artificially placed in human ureters was realized under the parameters of a manufactured model (Alexantriptor, HMT). We have observed neither interspersion of fragments nor ureteral damage. These in vitro experiments and our clinical experience confirm that Alexandrite laser lithotripsy is reliable and safe.

Humans↗
PubMed1991

Lithotripsy with the alexandrite laser: our initial 100 clinical cases.

The alexandrite laser system has proven to be an effective and safe method of treating ureteral stones. When the electromagnetic energy of a laser light pulse is selectively absorbed by the stone, a plasma forms at the surface. This plasma, which is composed of ions and electrons, continues to absorb laser energy, reaching very high pressure and generating a shock wave that fragments the stone. The degree of stone fragmentation is directly related to the composition and crystal lattice structure of the calculus. 112 calculi have been treated, and laser lithotripsy was successful in 87.5%. 6% of the stones were inadvertently flushed back into the kidney. No patient required an open ureterolithotomy. Guidance of the laser fiber onto the stone was performed by rigid ureteroscopy. There were no troublesome complications, and in a 3-month follow-up, no sequelae were reported.

Adult↗
PubMed1990

[Scrotal and perineal pain following coitus interruptus].

A case of perineal-scrotal and hypogastric pain following coitus interruptus in a young male patient is described. The physiopathological mechanisms involved in this condition in normal subjects or those with neuropathic disorders are discussed.

Adult↗
PubMed1989

[Usefulness of CAT in retroperitoneal fibrosis].

We report on six patients with with retroperitoneal fibrosis (RPF) who were evaluated preoperatively by CT. Patient scans disclosed a retroperitoneal fibrous layer localized between L4-S2, S3 in four of the six cases (65%). Similarly, varying degrees of uni-or bilateral utero-hydronephrosis were observed in five patients, and venous involvement with collateral abdominal circulation was observed in two. The surgical findings coincided with those of the CT scans, and disclosed that in the two patients with no evidence of a fibrous layer on the scan, this was due to the its being localized to an area in one or both sides of the pelvic cavity. The diagnosis was histologically confirmed as idiopathic retroperitoneal fibrosis in all six cases. We consider CT to be the preoperative method of choice in the diagnosis of RPF because it not only provides information on the status of the urinary system, the involvement of other retroperitoneal structures and the extent of the fibrous layer, it also provides orientation as to the possible etiology of the retroperitoneal fibrosis.

Adult↗
PubMedDate not supplied

[Genital brucellosis].

Since this is a systemic disease, it is not uncommon to find brucella organisms in urine during acute infection however, it frequently presents with orchi-epididymitis (2-20%) and, rarely, with granulomas in the urinary tract. We report on two cases of acute epididymitis. The pathogenesis, diagnosis and treatment of this disease entity are briefly viewed highlighting the urological problem.

Abscess↗