Microperc Feasibility Study

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Background and Purpose:

Microperc using all-seeing needle is associated with reduce tract-related morbidity. The purpose of this study was to examine the effectiveness and safety of microperc in children.

Patients and Methods:

From July 2010 to August 2014, a total of 17 patients with renal stones underwent microperc at our institution. Renal access was achieved through 4.85-Fr (16 gauge) all-seeing needle under direct vision and fragmentation with 200 µm holmium:YAG laser fiber. The patient’s demographic data, operating time, hemoglobin drop, complications (Clavien-Dindo), and length of hospital stay were prospectively studied. A complete stone-free status or CIRF at 1 month was accepted as the criterion for final clinical success.

Results:

A total of 17 patients with a median age of 9 years were studied. The stone size ranged from 5.3mm to 24.9mm. The median operative time was 40 minutes. The median decrease in hemoglobin was 1.2 mg/dl. The stone-free rate at postoperative day 1 and 1st month was 82.4% and 88.2% respectively. The mean hospital stay was 56.4
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The patient was monitored for postoperative complications. Ureteric catheter was removed along with Foley catheter in first post-operative day. DJ stent was removed after 4weeks. The patients were re-evaluated with KUB to assess the stone free rate at day 1 and 1-month follow up. Clearance was defined as no residual stone on KUB and ultrasound. All fragments less than 4 mm were considered clinically insignificant residual fragments (CIRF).

The patient’s demographic data, stone characteristics, stone fragmentation method, intraoperative assessment of stone fragmentation, complications (Clavien-Dindo), operating time, hemoglobin drop and length of hospital stay were prospectively studied. A complete stone-free status or CIRF at 1 month was accepted as the criterion for final clinical success.

Statistical

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