Publications by authors named "Luitzen Groen"

Primary hyperoxaluria (PH) is an inherited disorder that results from the overproduction of endogenous oxalate, leading to recurrent kidney stones, nephrocalcinosis and eventually kidney failure; the subsequent storage of oxalate can cause life-threatening systemic disease. Diagnosis of PH is often delayed or missed owing to its rarity, variable clinical expression and other diagnostic challenges. Management of patients with PH and kidney failure is also extremely challenging.

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In this prospective observational study, the incidence, risk factors and the time to event of urinary retention in children receiving intravenous opioids were evaluated. Urinary retention was confirmed by ultrasound following the inability to void for 8 h or earlier in patients experiencing discomfort. In total, 207 opioid episodes were evaluated, of which 199 (96.

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Introduction And Objective: The use of intravesical onabotulinum-A toxin (BoNT-A) injections in the treatment of idiopathic detrusor overactivity has been widely studied in adults [2-5]. However, in pediatric populations, study groups are small, and results are not yet sufficient to support this treatment as a standard practice. The aim of this study is to determine the effectiveness and safety of this treatment in children with non-neurogenic detrusor overactivity, resistant to conservative therapy.

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Introduction: Lower urinary tract symptoms (LUTS) are very common in children. Standard treatments consist of urotherapy, antibiotic prophylaxis, anti-muscarinics, physical therapy, and the treatment of coexisting constipation. A small group of girls also present with stress incontinence or with stress-induced urge incontinence.

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Objective: To assess the long-term outcome of continent diversion in children with structural or neurogenic cause of incontinence, with special interest in differences between closed and open bladder neck procedures.

Patients And Methods: A cohort of 63 children with intractable incontinence treated with continent diversion between January 1998 and January 2008 were reviewed for underlying disease, type of surgery, complications and outcome.

Results: Forty patients had a continent diversion with open bladder neck (group 1) and 23 patients had their bladder neck closed (group 2: 11 primarily closed; 12 secondarily closed).

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