Percutaneous Stone Surgery in Spina Bifida Patients––Are Stone-Free Rates Worth the Risk?

Nephrolithiasis management and outcomes in pediatric patients with limited mobility

INTRODUCTION AND OBJECTIVES

Pediatric patients with limited lower extremity mobility may be at increased risk of developing nephrolithiasis due to bone mineral metabolic derangements. This study sought to assess whether nephrolithiasis management and related outcomes differ between ambulatory versus non-ambulatory pediatric patients.

METHODS

This was a retrospective review of ambulatory and non-ambulatory pediatric patients with nephrolithiasis from 2010 to 2021 from a single tertiary care center. Demographics, surgical history, stone compositions, and 24-h urine data were reviewed. Adjusted logistic and linear regression models were utilized to assess whether mobility status was associated with nephrolithiasis-related management and outcomes, including: age at first stone; requiring surgical intervention for stones; number of surgeries; stone compositions; urine culture results; and completion of 24-h urine studies.

RESULTS

Among 339 pediatric patients with nephrolithiasis, 67 (19.8%) were non-ambulatory. In adjusted analyses, non-ambulatory patients had 3.24 times greater odds of requiring surgical intervention for stones (95% CI: 1.93-6.84; p < 0.0001); among those who required surgery, non-ambulatory patients required an average of 0.82 more surgical interventions (95% CI: 0.35-1.30; p = 0.0008) than ambulatory patients. Additionally, non-ambulatory patients had 5.28 times greater odds of having a positive urine culture at the time of surgery (95% CI: 2.35-14.08; p = 0.0001) and were significantly less likely to undergo 24-h urine studies (OR: 0.35; 95% CI: 0.15-0.83; p = 0.02). Stone composition significantly varied by mobility status, with non-ambulatory patients being significantly more likely to form calcium apatite (OR: 5.1; 95% CI: 2.18-11.93; p = 0.0002) or struvite (OR 3.72; 95% CI: 1.18-11.74; p = 0.03) stones, and significantly less likely to form calcium oxalate stones (OR: 0.19; 95 CI: 0.08-0.47; p = 0.0003). Among all patients, age at first stone occurred at a median age of 13.4 years (IQR: 8.2-16.4) and did not significantly differ by mobility status (p = 0.92).

CONCLUSIONS

Patients with limited mobility required surgery for nephrolithiasis at significantly higher rates and had different stone compositions than ambulatory patients. Obtaining a 24-h urine study in patients with comorbidities affecting ambulation was uncommon, compared to ambulatory patients. Similarly to ambulatory patients, pediatric patients with limited mobility who develop nephrolithiasis tend to first present with stones in early adolescence.

Incidence and safety outcomes associated with active stone removal procedures (ASRP): a comparison between neurological and non-neurological patients using the French National Health Data Base

PURPOSE

To compare the incidence and the safety outcomes associated with active stone removal procedure (ASRP) between neurological and non-neurological patients.

MATERIALS AND METHODS

The present study was conducted using the data issued from the French National Health Data Base. All patients that have been hospitalized to undergo an ASRP between January 1 2012 and December 31 2018 were included and allocated to four neurological groups (multiple sclerosis, spinal dysraphism, paraplegia, tetraplegia) and one non-neurological group. The primary outcome was the rate of patients hospitalized at least once to undergo an ASRP over the study period. The secondary outcomes included the type of ASRP performed, the length of hospital stay, the rates of post-operative UTI, of early re-admission and re-treatments. Multivariate logistic regression was used to estimate odd ratios, the four neurological groups being compared to the non-neurological group.

RESULTS

During the study period, 45,745,055 patients were hospitalised, with 151,850 of them presenting with an underlying neurological disease. Among the non-neurological patients, 0.89% underwent an ASRP, while 1.39% neurological patients did. Neurological patients presented with a lower rate of ESWL associated with a higher rate of PCNL, while the length of hospital stay, the rate of post-operative UTI, of early re-admission and of re-treatment were systematically increased (p < 0.001), when compared to non-neurological patients, regardless of the type of ASRP considered.

CONCLUSIONS

The results presented here confirm and clarify the incidence and the safety outcomes associated with ASRP within the neurological population and advocate for the emergence of a dedicated research field focusing on neuro-urolithiasis.

Risk factors for urinary infection after retrograde upper urinary lithotripsy: Implication for nursing

There are needs to evaluate the risk factors for urinary infection after retrograde upper urinary lithotripsy, to provide insights into the management and nursing care of patients with retrograde upper urinary lithotripsy.Patients who received retrograde upper urinary lithotripsy with a Foley 20 urinary tube insertion from June 1, 2019 to December 31, 2020 in our hospital were selected. Patients were grouped urinary infection and no infection group according to the culture results of urine, and the clinical data of the 2 groups of patients were collected and compared. Single factor and logistic regression analysis were used to analyze the risk factors of urinary tract infection after retrograde upper urinary lithotripsy.Four hundred ten patients with retrograde upper urinary lithotripsy were included, of whom 62 patients had the urinary tract infection, the incidence of urinary tract infection was 15.12%. There were significant differences in the gender, age, diabetes, stone diameter, duration of urinary tube insertion and duration of surgery between infection and no-infection group (all P < .05). The Escherichia coli (62.90%) was the most commonly seen bacterial in patients with urinary tract infection. Female (odds ratio [OR]: 1.602, 95% confidence interval 95% [CI]: 1.132∼2.472), age >50 years (OR: 2.247, 95% CI: 1.346∼3.244), diabetes (OR: 2.228, 95% CI: 1.033∼3.451), stone diameter ≥2 cm (OR: 2.152, 95% CI: 1.395∼3.099), duration of urinary tube insertion ≥3 days (OR: 1.942, 95% CI:1.158∼2.632), duration of surgery ≥90 minutes (OR: 2.128, 95% CI: 1.104∼3.846) were the independent risk factors for the postoperative urinary tract infection in patients with retrograde upper urinary lithotripsy (all P < .05).The incidence of urinary tract infection in patients undergoing retrograde upper urinary lithotripsy was high, counteractive measures targeted on those risk factors are needed to prevent and reduce the postoperative urinary infection in clinical settings.

Supine PCNL in patient with staghorn renal stone and severe degree kyphosis: A case report

Spinal deformity concomitantly with large renal stone has become a challenges for urologist since it needs different approach in performing percutaneous procedures. This case report highlight our success experience in treating a 53-years old female patients with severe degree of kyphosis and staghorn stone using supine PCNL. She underwent right PCNL and right Double-J stent insertion anterograde after stone were released. The duration of surgery was 2 hours and 45 minutes with no intra and post-operative complication reported. Supine position can be safely chosen if prone cannot be placed in complex situation such as staghorn stone in severe kyphosis patients.

Percutaneous nephrolithotomy in patients with spinal cord injury: should all these patients be automatically assigned a Guy's stone score of 4?

PURPOSE

To assess the complication and stone-free rates of PCNL in patients with spinal cord injury (SCI) and to evaluate whether this population should be assigned a Guy's stone score (GSS) of 4.

METHODS

A case-control study was conducted, and electronic charts were reviewed to search for patients with SCI, bladder dysfunction, and kidney stones who had undergone PCNL. Control cases were randomly selected from among patients with complete staghorn calculus (GSS = 4).

RESULTS

One hundred and seventeen patients were included. Patients with SCI had a significant shorter operative time (119 vs. 141 min; p = 0.018). There were no significant differences between the groups in terms of the patients' position, number of renal tracts, bleeding or transfusion rate; however, there was a significantly higher complication rate (23.1% vs. 7.8%; p = 0.009) and a longer hospital stay (5.8 vs. 3.1 days; p = 0.002) among patients with SCI. With regards to the stone-free rate in patients with different grades of GSS patients with SCI who had a GSS of 1 had a stone-free rate of 85.7%, while those with a GSS of 2, 3, or 4 had 50%, 50%, and 31.5%, respectively (p = 0.024). Only patients with a GSS of 4 in the SCI group had outcomes that were similar to those of control patients (31.5% vs. 31.6%).

CONCLUSION

Patients with SCI should not be automatically assigned GSS 4. Stone-free rate is related to stone burden in these patients, although they do show a higher complication rate and a longer hospital stay than non-neurological patients.

Transpsoas cystolitholapaxy in a pediatric patient with myelomeningocele, augmented neobladder, and Mitrofanoff appendicovesicostomy

Recurrent urolithiasis is a common and potentially morbid complication of spina bifida. Although the size, the location, and the composition of these stones often necessitates percutaneous intervention, access is often complicated by body habitus and spinal deformity. There is little consensus regarding the approach to percutaneous lithotripsy when a clear path to the collecting system is unavailable, particularly in the setting of surgically augmented urological anatomy. Here we present the first known case in which a pediatric patient with spina bifida underwent percutaneous lithotripsy of bladder stones via a transpsoas approach.