One week stenting after pediatric laparoscopic pyeloplasty; is it enough?

INTRODUCTION

The use of ureteric stents for urinary diversion after pediatric dismembered pyeloplasty and its duration remain debatable. Classically, an indwelling Double J ureteric stent has to be left for 4-6 weeks. However, such a duration is not free of stent-related complications, in addition to the need to remove it under general anesthesia in the pediatric age group.

OBJECTIVES

This study aims to evaluate the outcome of short-term stenting after laparoscopic pyeloplasty in pediatric sector.

METHODS

A prospective randomized study of 37 children (less than 16 years-old) with pelvi-ureteric junction obstruction (PUJO) were managed by laparoscopic pyeloplasty by the same surgeon in the period between April 2015 and September 2017. In group A (18 patients), the DJ was removed after 4 weeks under general anesthesia, while in group B (19 patients), the DJ was fixed to the urethral catheter by a stitch, and it was removed with the urethral catheter after one week in the outpatient office. All patients were followed regularly for symptomatic improvement. Urine culture and sensitivity was done 1 month postoperatively. Abdominal ultrasound was done at 3, 6, 12 months and annually thereafter, while renal isotope scanning was done after 6 months.

RESULTS

There were no significant differences between both groups regarding operative duration, postoperative leakage, hospital stay, early postoperative complications. Both groups improved after pyeloplasty with no significant differences regarding symptoms, follow-up ultrasound, and renal scanning. The incidence of irritative symptoms and need for anticholinergics after catheter removal as well as urinary tract infection after 1 month were significantly higher in group A (P-value: 0.004 and 0.029, respectively) (Table).

DISCUSSION

To the authors knowledge, this is the first prospective controlled randomized study comparing short-term stenting with the classic 4 weeks stenting after laparoscopic pyeloplasty in the pediatric age group. In addition, the used technique of stenting not only allows stent removal on outpatient basis without anesthesia but also benefits from the pre-operative retrograde study so as not to miss any associated pathology in the ureter.

CONCLUSION

Short-term ureteric stenting after laparoscopic pyeloplasty in pediatric age group is safe and not inferior to the standard 4-week stenting. It also avoids the stent-related complications.

Comprehensive evaluation of grafting the preservable narrow plates with consideration of native plate width at primary hypospadias surgery

INTRODUCTION

Dorsal inlay graft urethroplasty using inner-face preputial graft was described as an adjunct method to the classic tubularized incised plate (TIP) urethroplasty, aiming at reducing the risk of neourethral stenosis.

OBJECTIVES

To evaluate the impact of dorsal inlay grafting of preservable narrow plates, in relation to native plate width.

METHODS

Consecutive children with penile hypospadias with narrow plate (width < 8 mm) were evaluated prospectively between Jan 2014 and Jun 2018. Included cases were stratified into two groups: group A (plate width: 4 to <8 mm) and group B (plate width: < 4 mm). All cases were approached by TIP urethroplasty, with dorsal inlay grafting (inner-face prepuce). Cases with significant chordee (non-preservable plates), circumcised cases, and redo cases were excluded.

RESULTS

A total of 104 hypospadias cases with narrow plates were included in this study. Among group A (n = 81), the need for postrepair urethral dilations was reported in two cases (2.5%) vs seven cases (30%) in group B (n = 23) (P-value < 0.001). Another two cases (2.5%) in group A developed urethrocutaneous fistulae vs three cases (13%) in group B (P-value = 0.0624). Surgical repair of the reported five cases with fistulae, revealed an ample neourethral wall; disclosing well-taken grafts in both groups.

DISCUSSION

Few published studies evaluated grafting the incised plate in penile hypospadias. To the authors knowledge, this is the first study that selectively evaluated the impact of grafting narrow plates in relation to its native pre-incision width.

CONCLUSIONS

According to the presented authors' experience, 4 mm width is the border line of clinical relevance that defines poor urethral plate. Grafting that plate failed to compensate for its native poor characteristics; however, it offered a valuable neourethral wall that proved indispensable when redo surgery deemed necessary, without adding grafting-related problems. Nevertheless, further extended comparative studies came across as a necessity to verify the long-term outcomes of grafting the incised poor plates.

Use of holmium laser for urethral strictures in pediatrics: A prospective study

INTRODUCTION

The management of urethral strictures is very challenging and requires the wide expertise of different treatment modalities ranging from endoscopic procedures to open surgical interventions.

OBJECTIVE

To assess the effectiveness and complications of retrograde endoscopic holmium: yttrium-aluminum-garnet laser (Ho: YAG) urethrotomy (HLU) for the treatment of pediatric urethral strictures.

PATIENTS AND METHODS

From January 2010 to January 2013, 29 male pediatric patients with a mean age of 5.9 years and primary urethral strictures 0.5-2 cm long were treated using HLU. The stricture length was <1 cm in 16 (55%) patients and >1 cm in 13 (45%). Fifteen (51.7%) patients had an anterior urethral stricture, while 14 (48.3%) had a posterior urethral stricture. No positive history was found in 14 (48.3%) patients for the stricture disease, while six (20.7%) had straddle trauma and nine (31%) had an iatrogenic stricture. All of the patients were pre-operatively investigated and at 3 and 6 months postoperation by uroflowmetry and voiding cystourethrography (VCUG). If there were suspicious voiding symptoms, selective uroflowmetry and VCUG were performed at 12 months postoperation.

RESULTS

The mean operation time was 31.7 min (20-45 min). Twenty-three (79.3%) and 18 (62.1%) patients showed normal urethra on VCUG with improvement of symptoms at 3 and 6 months, respectively. Thus, recurrence was 37.9% after 6 months of follow-up. The mean pre-operative peak urinary flow rate (Qmax) was 6.47 ml/s. The mean postoperative Qmax at 3 and 6 months was 17.17 ml/s and 15.35 ml/s, respectively. The success rate and flowmetry results did not show any statistical significance in relation to site, length and cause of the strictures. The other 11 patients who failed to improve underwent repeated HLU sessions: 4/11 (36.3%) achieved successful outcomes. Among the seven patients with failed HLU for the second time, a third session was conducted. However, only one patient (14.2%) was cured, while open repair was needed for the remaining six.

DISCUSSION

One study has previously been published on the management of pediatric urethral strictures using HLU. The present results are similar to short-term studies after a single session of visual internal urethrotomy using cold knife (VIU). In the present study, the length, location and cause of strictures did not significantly affect the results. However, the outcomes with strictures <1 cm were better than strictures >1 cm, although patients with strictures >2 cm were excluded. In the present study, the success rates among patients with second and third sessions of HLU were 36.3% and 14.2%, respectively. This was similar to other studies, which reported low success rate with the second session of VIU. The present study was limited by the relatively short period of follow-up and the small number of patients. However, it was the first prospective study evaluating HLU for pediatric strictures. The use of flowmetry and VCUG for evaluation of all patients added to the strength of the study.

CONCLUSION

HLU can be safely used with good success rates for the treatment of primary urethral strictures (<2 cm) in children. Repeat HLU (more than twice) adds little to success.