Higher Accuracy and Better Clinical Outcomes in Navigated Thoraco-Lumbar Pedicle Screw Fixation Versus Conventional Techniques : A Systematic Review and Meta-Analysis.

STUDY DESIGN: A systematic review and meta-analysis. OBJECTIVE: This study aims to compare pedicle screw accuracy, clinical outcomes, and complications between navigated and conventional techniques. SUMMARY OF BACKGROUND DATA: In the last decades, intraoperative navigation has been introduced in spinal surgery to prevent risks and complications. MATERIALS AND METHODS: The search was executed on Cochrane Central Library, PubMed, and Scopus on April 30, 2023. Randomized controlled trials, prospective and retrospective studies that compared pedicle screw accuracy in the thoracic-lumbar-sacral segments, blood loss, operative time, hospital stay, intraoperative and postoperative revision of screws, neurological and systemic complications, Visual Analogue Scale (VAS), and Oswestry Disability Index (ODI) between navigated and freehand or fluoroscopy-assisted techniques were included in this study. The meta-analysis was performed using Review Manager software. Clinical outcomes were assessed as continuous outcomes with mean difference, while pedicle screw accuracy and complications were assessed as dichotomous outcomes with odds ratio, all with 95% CIs. The statistical significance of the results was fixed at P <0.05. RESULTS: This meta-analysis included 30 studies for a total of 17,911 patients and 24,600 pedicle screws. Statistically significant results in favor of the navigated technique were observed for the accuracy of pedicle screws ( P =0.0001), hospital stay ( P =0.0002), blood loss ( P <0.0001), postoperative revision of pedicle screws ( P <0.00001), and systemic complications ( P =0.0008). In particular, the positioning of the screws was clinically acceptable in 96.2% of the navigated group and 94.2% with traditional techniques. No significant differences were found in VAS, ODI, and operative time between the two groups. CONCLUSION: Navigated pedicle screw fixation has been demonstrated to be a safe and effective technique with high improvement in clinical outcomes and accuracy in patients undergoing spinal fusion compared with conventional techniques. LEVEL OF EVIDENCE: Level III.

Outpatient department repair of urethrocutaneous fistulae using n-butyl-cyanoacrylate (NBCA): a single-centre experience.

OBJECTIVES: • To evaluate urethrocutaneous fistula repair after urethroplasty using n-butyl cyanoacrylate (NBCA) in an outpatient setting. • To compare results of application of NBCA in 'early' and long-standing fistulae. PATIENTS AND METHODS: • From January 2003 to December 2006, 13 children (mean age 36 months) were treated in our Outpatient Department for urethrocutaneous fistula, which occurred after hypospadias repair. • We analysed the data dividing the patients in two groups: group A comprised six children (mean age 22.6 months) that developed a fistula within 2-3 days of catheter removal after urethroplasty ('early' fistula) and group B comprised seven children (mean age 42.6 months) with long-standing fistulae. • In all patients, a multilayer of NBCA was applied, attaching the edges of the fistula taking care to perform a scarification of the edges of the fistula in patients in group B before the application of the glue. RESULTS: • Four patients in group A and three patients in group B had definitive fistula repair (seven of 13), and six of the 13 had fistula recurrence. • Fistulae of ≤ 2 mm were more easily repaired than fistulae of > 2 mm (five of seven vs two of six). • Fistulae that tended to recover were those that responded to the first applications. CONCLUSIONS: • In this experience the use of NBCA as a minimally invasive treatment for fistula repair gave good results for repairing fistulae. • These preliminary results encourage the use of NBCA as a first non-surgical attempt to repair urethrocutaneous fistulae especially if the fistula is ≤2 mm. • The failure of this procedure does not compromise a possible subsequent surgical repair.

Preliminary experience with a new approach for infantile hypertrophic pyloric stenosis: the single-port, laparoscopic-assisted pyloromyotomy.

BACKGROUND: Ramstedt pyloromyotomy is still the procedure of choice for infantile hypertrophic pyloric stenosis; however, the best way to approach the pylorus is debated. Recent literature reports many comparisons between various open approaches and laparoscopic one. The purpose of this preliminary experience is to show a new approach to infantile hypertrophic pyloric stenosis: single-port, laparoscopic-assisted pyloromyotomy. METHODS: Nineteen infants underwent single-port laparoscopic-assisted pyloromyotomy. The approach to the abdominal cavity is performed through a right circumbilical incision, and then a 12-mm trocar is inserted. After the pneumoperitoneum is established, an operative telescope is introduced. Once the telescope is inserted, the pylorus is easily located, and then grasped and exteriorized via the umbilical incision. At this point, conventional Ramstedt pyloromyotomy is performed. Once the pylorus is reintroduced in the abdomen, a new pneumoperitoneum is created to control mucosal integrity and hemostasis. A retrospective statistical analysis was performed to compare patients who underwent this technique to others approached by the same team with right upper quadrant incision or right semicircular umbilical skin-fold incision. RESULTS: In all 19 cases, adequate pyloromyotomy was performed in a good ranging time without any intra- or post-operative complications, achieving excellent early cosmetic results. CONCLUSIONS: The feasibility of single-port, laparoscopic-assisted pyloromyotomy obtained in this small sample suggests that this procedure could be an excellent alternative to open or laparoscopic pyloromyotomy as long as it acts as intermediary between the two techniques.

Double-cross flap protection: new technique for coverage of neourethra in hypospadias repair.

PURPOSE: We analyzed a new urethra preserving approach, double-cross flap protection, during tubularized incised plate urethroplasty. We compared the results of 57 patients treated with this new procedure and 80 patients treated with 2 different techniques. MATERIALS AND METHODS: We studied 137 patients with hypospadias between October 2002 and March 2008. Patients were divided into 3 groups. Group 1 consisted of 40 patients (mean age 50 months) undergoing tubularized incised plate urethroplasty. Group 2 included 40 patients (mean age 48 months) undergoing tubularized incised plate urethroplasty with dorsal subcutaneous flap. Group 3 consisted of 57 patients (mean age 39 months) undergoing tubularized incised plate urethroplasty with 2 de-epithelialized preputial flaps twisted ventrally and sutured individually over the neourethra. All patients were operated on by the same surgeons. Statistical analysis of postoperative complications was performed by ANOVA and chi-square test. RESULTS: In Group 1 fistula developed in 6 patients (15%) and was associated with stenosis of the neourethra in 4 (10%). In Group 2 fistula developed in 4 patients (10%). In Group 3 no fistula was observed, but mild stenosis of the neomeatus developed in 3 patients (5.3%), which was treated with dilation. Thus, the incidence of fistula in group 3 was significantly less (p = 0.015). CONCLUSIONS: Double-cross flap protection is safe and significantly reduces the incidence of postoperative fistula.

Minimally invasive removal of urachal remnants in childhood.

OBJECTIVES: Urachal remnants are rare congenital anomalies generally treated with open surgery. In the last decade laparoscopic treatment of these anomalies became more frequent. The Authors report their experience about minimally invasive treatment of remnants. METHODS: Four children with urachal remnants underwent minimally invasive surgery. Two children with infected urachal cysts underwent delayed laparoscopic assisted excision. In the others two patients with urachal cysts diagnosed incidentally the excision of the remnant was performed laparoscopically. RESULTS: In all cases the excision of remnants was accomplished easily. Operative time ranged from 40 to 90 minutes. Intra- or post-operative complications and recurrences did not occur and the cosmetic results were very good. CONCLUSIONS: Minimally invasive surgery for urachal remnants is reliable, diagnostic and therapeutic at the same time. In case of complicated urachal cysts the delayed laparoscopic assisted treatment ensure a minimally invasive surgery with a single anesthesia.