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Nicolas Lesaux

Publications and source records attributed to Nicolas Lesaux.

5 recordsLinked to original sources
PubMed2006

Endoscopic lithotripsy and the FREDDY laser: initial experience.

BACKGROUND AND PURPOSE: The frequency-doubled double-pulse neodymium:YAG (FREDDY) laser has been developed for endoscopic lithotripsy and combines the characteristics of solid and dye lasers with a thin flexible optical fiber enabling it to be used with flexible ureterorenoscopy. Furthermore, it is less expensive and easier to maintain than other lasers. Our goal was to evaluate its efficacy and role in the ureteroscopic treatment of urinary stones. PATIENTS AND METHODS: We used a FREDDY laser in 26 patients (29 stones). For 4 stone cases, this was the first line of treatment; for the remaining cases, this was the second line of treatment, following SWL in 23 cases and nephrolithotomy in 2 cases. The mean stone size was 9 mm, with a range of 6 to 15 mm. There were 13 renal and 16 ureteral stones. The absence of residual fragments at 3-month postoperative radiography was considered to reflect successful treatment. RESULTS: Twenty-six stones were treated with satisfactory results. Within 3 months, 18 patients were stone free (69%), and 72.4% of the stones (21/29) had been treated completely. Fragments of 8 stones still remained in 8 patients. Of these stones, 5 were >10 mm and persisted at 3 months. Fragmentation was ineffective for 2 cystine stones and poor for 1 calcium oxalate monohydrate stone. Hospitalization, on average, was 1.5 days with a range of 1 to 3 days. A ureteral perforation was observed in the case of an impacted ureteral stone. CONCLUSIONS: Because of the wavelengths used, endoscopic FREDDY laser lithotripsy is an effective and harmless method. This laser can be used as a therapeutic tool because of its moderate cost and ability to be used with flexible ureterorenoscopy. However, it is important to be aware of the FREDDY laser's limited fragmentation capabilities for cystine stones and its inability to treat tissue lesions such as urinary-tract stenosis and tumors.

Adult↗
PubMed2006

[Laparoscopic partial nephrectomy: A series of 17 cases].

OBJECTIVE: The objective of this study was to evaluate the Feasibility, the morbidity and the carcinologic results of laparoscopic partial nephrectomy. MATERIAL AND METHODS: Between August 2001 and December 2005, 17 partial nephrectomies were performed by laparoscopy in patients with a mean age of 59.2 years. Postoperative complications, the conversion rate, operating time, arterial clamping time, length of hospital stay and oncological results were studied for each patient. RESULTS: The mean operating time was 190 min, the mean arterial clamping time was 30 min and the mean hospital stay was 6.3 days. There were 2 complications including one postoperative haematoma requiring surgical revision for drainage and repositioning of a stent for urine leak. Two conversions had to be performed early in our experience. A tumour recurrence 2 years after the initial operation was treated by total nephrectomy. CONCLUSION: Our results in terms of morbidity are similar to those reported for open surgery, but the recurrence rate appears to be slightly higher than that observed with open partial nephrectomy. Laparoscopic partial nephrectomy remains a difficult operation requiring a learning curve even for a department that regularly performs laparoscopic surgery.

Adult↗
PubMed2005

[Post-traumatic renal arteriovenous fistula discovered after 28 years].

There is only one published case of arteriovenous fistula discovered 20 years after firearm trauma. The authors report the case of a 47-year-old man injured by firearm 28 years ago presenting with a highflow aneurysm of the right renal artery secondary to arteriovenous fistula and associated with lower pole renal tumour and describe the radiological work-up and surgical management.

Arteriovenous Fistula↗
PubMed2005

[Endoscopic lithotripsy and FREDDY laser technology. Initial experience].

INTRODUCTION AND PURPOSE: FREDDY laser technology was developed for endocorporeal lithotripsy. The purpose of this study was to evaluate, based on our initial experience, the efficacy and place of this technology in the treatment of urinary calculi by ureterorenoscopy. (World of Medicine) to treat 26 patients (29 stones) by ureterorenoscopy. This was the second procedure for 25 stones: after ESWL (23 cases) or percutaneous nephrolithotomy (2 cases) and the first procedure for 4 stones. The mean stone diameter was 9 mm (range: 6-15 mm). Thirteen stones were situated in the kidney and 16 were in the ureter. Success of treatment was defined by the absence of residual fragments immediately after the operation or at one month on plain abdominal x-ray. RESULTS: Twenty-six stones were satisfactorily fragmented. At three months, 21 out of 26 (80.7%) patients were stone-free corresponding to 21 out of 29 (72.4%) stones). Failures concerned 8 stones (5 patients). For five stones, measuring more than 10 mm, residual fragments persisted at three months. For three other stones, two cystine stones and one calcium oxalate monohydrate stone, fragmentation was insufficient or even nonexistent for the cystine stones. The mean length of hospital stay was 1.5 days (range: 1-3 days). A ureteric perforation due to a stone impacted in the ureteric wall was observed. CONCLUSIONS: FREDDY laser endoscopic lithotripsy is a safe and effective method due to the wavelength used. This laser could constitute an alternative treatment option in view of its moderate cost and the fact that it is adapted to flexible ureterorenoscopy. However, it presents certain limitations in terms of fragmentation, particularly in the case of cystine stones, and cannot be used to treat solid lesions (urinary tract strictures and tumours).

Adult↗