IU Indianapolis ScholarWorks :: Browsing by Author "Szymanski, Konrad M."

Browsing by Author "Szymanski, Konrad M."

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A patient- and parent-centered approach to urinary and fecal incontinence in children and adolescents with spina bifida: understanding experiences in the context of other competing care issue
(Elsevier, 2023) Szymanski, Konrad M.; Carroll, Aaron E.; Misseri, Rosalia; Moore, Courtney M.; Hawryluk, Bridget A.; Wiehe, Sarah E.; Pediatrics, School of Medicine
Introduction: Despite significant and known challenges to urinary and fecal incontinence (UI and FI, respectively) among children with spina bifida (SB) and their families, few studies have identified patient-centered measures and approaches to assessing them. This study represents the first stage of a larger study to develop a patient-centered goal-setting tool to guide incontinence management (Figure). Our aim was to understand patient experiences of UI and FI, and what goals should be included in the tool. Methods: We used a qualitative research approach integrated with human-centered design methods. We recruited, in clinic and online, children with SB (8-17 years old) and parents (>=18 years old) of children with SB (8-17 years old). Online activities were analyzed by four experienced design researchers using affinity diagramming, group analysis and modeling activities (mind maps, challenge maps, experience maps). Recruitment and thematic qualitative analysis continued until saturation was reached. Results: Seventeen children with SB participated (9 female, 12 shunted, 13 using bladder catheterizations, 6 using Malone antegrade continence enema, median age: 15 years old). Fifteen parents participated (13 mothers/2 fathers, median age: 42 years old), including six mother-child dyads. Five major themes each were identified for UI and FI experiences: (1) negative emotional impact of incontinence, (2) unpredictability of incontinence, (3) challenging/unpleasant incontinence management, (4) inconvenient/unreliable incontinence management, (5) UI management having unpleasant complications and FI putting much responsibility on parents. We identified six UI goal domains and five FI goal domains. Four overlapping domains included: accidents, independence, interruptions at school and social/friends. Unique domains were: urinary tract infections (UI), catheterizations (UI) and enemas (FI). Comment: Findings of our study improve our understanding of children's and parents' experiences associated with incontinence in SB and potential continence goals. Conclusions: Children with SB experience incontinence as distressing and unpredictable. Incontinence management can be challenging and unreliable. Patient-centered continence goals cluster in domains, indicating how incontinence intermeshes with other life areas and offering potential approaches to structure continence goals in a goals-selection tool.
Age-based risk of end-stage kidney disease in patients with myelomeningocele
(Elsevier, 2023-04) Adams, Cyrus M.; Misseri, Rosalia; Roth, Joshua D.; Whittam, Benjamin M.; Guckien, Zoe E.; King, Shelly J.; Kaefer, Martin; Rink, Richard C.; Szymanski, Konrad M.; Urology, School of Medicine
Objective We aimed to quantify end-stage kidney disease (ESKD) risk after infancy in individuals with myelomeningocele (MMC) followed by urology in the modern medical era and to assess if ESKD risk was higher after surgery related to a hostile bladder. Methods We retrospectively reviewed patients with MMC followed by urology at our institution born ≥ 1972 (when clean intermittent catheterization was introduced) past 1 year of age (when mortality is highest, sometimes before establishing urology care). ESKD was defined as requiring permanent peritoneal/hemodialysis or renal transplantation. Early surgery related to hostile bladder included incontinent vesicostomy, bladder augmentation, detrusor Botulinum A toxin injection, ureteral reimplantation, or nephrectomy for recurrent urinary tract infections. Survival analysis and proportional hazards regression were used. Sensitivity analyses included: risk factor analysis with only vesicostomy, timing of surgery, including the entire population without minimal follow-up (n = 1054) and only patients with ≥ 5 years of follow-up (n = 925). Results Overall, 1029 patients with MMC were followed for a median of 17.0 years (49% female, 76% shunted). Seven patients (0.7%) developed ESKD at a median 24.3 years old (5 hemodialysis, 1 peritoneal dialysis, 1 transplantation). On survival analysis, the ESKD risk was 0.3% at 20 years old and 2.1% at 30 years old (Figure). This was ∼100 times higher than the general population (0.003% by 21 years old, p < 0.001). Patients who underwent early surgery for hostile bladder had higher ESKD risk (HR 8.3, p = 0.001, 6% vs. 1.5% at 30 years). On exploratory analyses, gender, birth year, shunt status and wheelchair use were not associated with ESKD risk (p ≥ 0.16). Thirty-year ESKD risk was 10% after early vesicostomy vs. 1.4% among children without one (p = 0.001). Children undergoing bladder surgery between 1.5 and 5 years old had a higher risk of ESKD. No other statistically/clinically significant differences were noted. Comment Patients with MMC remain at risk of progressive renal damage throughout life. We relied on the final binary ESKD outcome to quantify this risk, rather than imprecise glomerular filtration rate formulas. Analysis was limited by few people developing ESKD, inconsistent documentation of early urodynamic findings and indications for bladder-related surgery. Conclusions While ESKD is relatively uncommon in the MMC population receiving routine urological care, affecting 2.1% of individuals in the first 3 decades, it is significantly higher than the general population. Children with poor bladder function are likely at high risk, underlining the need for routine urological care, particularly in adulthood.
Building a prototype of a continence goal-selection tool for children with spina bifida: patient, parental and urology provider recommendations
(Elsevier, 2023) Szymanski, Konrad M.; Carroll, Aaron E.; Misseri, Rosalia; Moore, Courtney M.; Hawryluk, Bridget A.; Wiehe, Sarah E.; Pediatrics, School of Medicine
Introduction: No tools exist to help children with spina bifida (SB) describe their incontinence concerns and to help their providers account for them when evaluating management success. Our aim was to understand patients', parents', and clinicians' preferences about how a SB continence goal-selection tool (MyGoal-C) should look and function, and to create a tool prototype. Methods: We used a qualitative research approach integrated with human-centered design methods. We recruited children with SB (8-17 years old), parents ( ≥ 18 years old) of children with SB (8-17 years old) in clinic and online, and urology healthcare providers at our institution. We surveyed children and parents, and conducted parent and provider Zoom-based prototyping sessions to iteratively design the app. Design researchers analyzed online activities using affinity diagramming, group analysis and modeling activities. Provider sessions were analyzed with qualitative thematic analysis based on grounded theory. Recruitment continued until saturation was reached. Results: Thirteen children with SB participated (median age: 10 years old, 4 female, 9 shunted, 10 using bladder catheterizations). Thirty-seven parents participated (33 mothers, median age: 43 years old). Children and parents unanimously recommended an app and their comments generated 6 major theme domains: goal-setting process, in-app content, working toward goals, urology provider check-in, app customization, and using big data to improve future functionality. Twenty-one of the parents participated in 3 prototyping sessions with 6 breakout groups. The remaining 16 parents and 13 children then completed the Prototype Testing Survey, leading to a refined prototype and a visual flow map of the app experience (Figure). Feedback from 11 urology healthcare providers (7 female, 6 advanced practice providers) generated 8 themes: patient engagement/autonomy, clearly displaying results, integration into clinic workflow, not increasing clinical staff burden, potential clinician bias, parental involvement, limitations of the app, and future app adaptation. These cumulative data allowed for a construction of a final app prototype. Comment: Findings of our study lay the foundation for creating a goal-selection app that meets preferences and needs of children, parents, and providers. Next steps involve building the app, testing its usability and assessing it prospectively in a clinical setting. Conclusions: Children with SB and parents preferred an app to help them set and track continence goals. All stakeholders, including urology providers, offered complementary and mutually reinforcing feedback to guide the creation of an app prototype that would ultimately be integrated into a clinic visit.
Causes of death among people with myelomeningocele: A multi-institutional 47-year retrospective study
(IOS Press, 2023) Szymanski, Konrad M.; Adams, Cyrus M.; Alkawaldeh, Mohammad Y.; Austin, Paul F.; Bowman, Robin M.; Castillo, Heidi; Castillo, Jonathan; Chu, David I.; Estrada, Carlos R.; Fascelli, Michele; Frimberger, Dominic C.; Gargollo, Patricio C.; Hamdan, Dawud G.; Hecht, Sarah L.; Hopson, Betsy; Husmann, Douglas A.; Jacobs, Micah A.; MacNeily, Andrew E.; McLeod, Daryl J.; Metcalfe, Peter D.; Meyer, Theresa; Misseri, Rosalia; O'Neil, Joseph; Rensing, Adam J.; Routh, Jonathan C.; Rove, Kyle O.; Sawin, Kathleen J.; Schlomer, Bruce J.; Shamblin, Isaac; Sherlock, Rebecca L.; Slobodov, Gennady; Stout, Jennifer; Tanaka, Stacy T.; Weiss, Dana A.; Wiener, John S.; Wood, Hadley M.; Yerkes, Elizabeth B.; Blount, Jeffrey; Pediatrics, School of Medicine
Purpose: This study aimed to analyze organ system-based causes and non-organ system-based mechanisms of death (COD, MOD) in people with myelomeningocele (MMC), comparing urological to other COD. Methods: A retrospective review was performed of 16 institutions in Canada/United States of non-random convenience sample of people with MMC (born > = 1972) using non-parametric statistics. Results: Of 293 deaths (89% shunted hydrocephalus), 12% occurred in infancy, 35% in childhood, and 53% in adulthood (documented COD: 74%). For 261 shunted individuals, leading COD were neurological (21%) and pulmonary (17%), and leading MOD were infections (34%, including shunt infections: 4%) and non-infectious shunt malfunctions (14%). For 32 unshunted individuals, leading COD were pulmonary (34%) and cardiovascular (13%), and leading MOD were infections (38%) and non-infectious pulmonary (16%). COD and MOD varied by shunt status and age (p < = 0.04), not ambulation or birthyear (p > = 0.16). Urology-related deaths (urosepsis, renal failure, hematuria, bladder perforation/cancer: 10%) were more likely in females (p = 0.01), independent of age, shunt, or ambulatory status (p > = 0.40). COD/MOD were independent of bladder augmentation (p = >0.11). Unexplained deaths while asleep (4%) were independent of age, shunt status, and epilepsy (p >= 0.47). Conclusion: COD varied by shunt status. Leading MOD were infectious. Urology-related deaths (10%) were independent of shunt status; 26% of COD were unknown. Life-long multidisciplinary care and accurate mortality documentation are needed.
Characteristics of Female Genital Restoration Surgery for Congenital Adrenal Hyperplasia Using a Large-scale Administrative Database
(Elsevier, 2018) Roth, Joshua D.; Casey, Jessica T.; Whittam, Benjamin M.; Bennett, William E., Jr.; Szymanski, Konrad M.; Cain, Mark P.; Rink, Richard C.; Urology, School of Medicine
Objective To analyze nationwide information on the timing of surgical procedures, cost of surgery, hospital length of stay following surgery, and surgical complications of female genital restoration surgery (FGRS) in females with congenital adrenal hyperplasia (CAH). Materials and Methods We used the Pediatric Health Information System database to identify patients with CAH who underwent their initial FGRS in 2004-2014. These patients were identified by an International Classification of Diseases, Ninth Revision (ICD-9) diagnosis code for adrenogenital disorders (255.2) in addition to a vaginal ICD-9 procedure code (70.x, excluding vaginoscopy only) or perineal ICD-9 procedure code (71.x), which includes clitoral operations (71.4). Results A total of 544 (11.8%) females underwent FGRS between 2004 and 2014. Median age at initial surgery was 9.9 months (interquartile range 6.8-19.1 months). Ninety-two percent underwent a vaginal procedure, 48% underwent a clitoral procedure, and 85% underwent a perineal procedure (non-clitoral). The mean length of stay was 2.5 days (standard deviation 2.5 days). The mean cost of care was $12,258 (median $9,558). Thirty-day readmission rate was 13.8%. Two percent underwent reoperation before discharge, and 1 (0.2%) was readmitted for a reoperation within 30 days. Four percent had a perioperative surgical complication. Conclusion Overall, 12% of girls with CAH underwent FGRS at one of a national collaborative of freestanding children's hospitals. The majority underwent a vaginoplasty as a part of their initial FGRS for CAH. Clitoroplasty was performed on less than half the patients. Overall, FGRS for CAH is performed at a median age of 10 months and has low 30-day complication and immediate reoperation rates.
Current opinions regarding care of the mature pediatric urology patient
(Elsevier, 2015-10) Szymanski, Konrad M.; Misseri, Rosalia; Whittam, Benjamin; Large, Tim; Cain, Mark P.; Department of Pediatrics, School of Medicine
Introduction With continued improvements in pediatric urology care of patients with complex congenital genitourinary conditions, many survive into adulthood. This fact has created a challenging situation of transitioning from pediatric to adult care. Establishing long-term follow-up with appropriate specialists is a critical part of a successful transition to adulthood for this population. Objective This study sought to elucidate current practices and opinions regarding the management of adult complex genitourinary patients by pediatric urologists, in order to determine if a consensus for adult care exists. Study design An anonymous, 15-question online survey was created to address practice patterns and opinions regarding the transition of care of complex genitourinary patients. An invitation to participate was distributed via email to 200 pediatric urologists who were members of the American Urological Association. Complex genitourinary patients were defined broadly as those with a history of: spina bifida, bladder exstrophy, cloacal exstrophy, cloacal anomalies, posterior urethral valves or disorders of sex development. Fisher's exact test was used for analysis. Results The response rate was 31.0% (62/200). Two-thirds (67.7%) cared for adults with complex genitourinary conditions. Overall, 51.6% of pediatric urologists felt that general urologists best follow adult patients, but only 6.5% recommended this for patients with prior complex genitourinary reconstruction (P < 0.001). Instead, the majority (80.6%) felt that a pediatric or adult urologist with an interest and training in adolescent/transitional urology who routinely performs such procedures would provide optimal care. Follow-up by a primary care physician alone was not recommended. Recommendations did not change if patients had developmental delay or lived independently (P = 0.47 and P = 0.72, respectively). Overall, 69.4% would refer mature complex genitourinary patients to a urologist with interest and training in adolescent/transitional urology, if one was available. However, only 45.2% had such an individual available in their practice (P < 0.001). Discussion In the present study, the opinions of pediatric urologists regarding optimal providers of long-term follow-up for mature complex genitourinary patients were presented. While the results may not represent the views of the entire pediatric urology community, responses from motivated individuals with a particular interest in transition care may be especially valuable. Although the present study did not outline a mechanism for improving transitional care, it offered valuable information on prevailing opinions in this area. Finally, the opinions of mostly North American Pediatric Urologists were presented, which may not apply to other healthcare settings. Conclusions Pediatric urologists appeared to be virtually unanimous in recommending that urologists provide the most appropriate long-term follow-up of patients with congenital genitourinary conditions. Specifically, 80% recommended that patients with prior complex surgical reconstruction be followed by a urologist with specific interest, training and experience in the area of transitional urology. The data suggest that this may be an unmet need of these specialists and may signify the need for specific training in the care of such patients.
Growing up with clitoromegaly: Experiences of North American women with congenital adrenal hyperplasia
(Elsevier, 2022-12) Szymanski, Konrad M.; Kokorowski, Paul; Braga, Luis H.; Frady, Heather; Whittam, Benjamin; Hensel, Devon J.; Life with Congenital Adrenal Hyperplasia Study Group; Urology, School of Medicine
Introduction To describe experiences of clitoromegaly in women with congenital adrenal hyperplasia (CAH). Methods CAH females (46XX, ≥16 years old) from the United States and Canada were eligible for a cross-sectional online survey (2019–2020) if reporting clitoromegaly (life-long: “growing up with a larger than average clitoris,” secondary: “clitoris grew over weeks or months”). A multidisciplinary team and women with CAH drafted questions assessing net effects of clitoromegaly on 10 activities and 10 life domains. Fisher's exact test was used to compare net effect (positive-negative) vs. no effect (Bonferroni p = 0.05/10 = 0.005). Results Of 97 women with CAH enrolled, 53 women (55%, median age: 36 years, advocacy group recruitment: 81%) reported recognizing clitoromegaly at median 11–13 years old, with 21% identifying it in adulthood. There was no difference in self-reported timing or clitoral shape between life-long or secondary clitoromegaly (p ≥ 0.06). There were no net positive effects of clitoromegaly. Rather, clitoromegaly had net negative effects on 7/10 activities (p ≤ 0.003) and no net effect (neutral) on 3 (Table). Women were less likely to wear tight clothing, change clothes in public locker rooms and play group sports. Women reported net negative effects for most romantic activities (dating, any sexual activity, pain-free sexual activity, having a partner see their genitalia, p=<0.003), but did not report a net effect on pleasurable sexual activity (p = 0.12). Clitoromegaly had net negative effects in 9/10 life domains (p < 0.001) and neutral on job self-perception (p = 0.25). Few women reported any positive impact (2–6%). However, 49–59% of women experienced poor self-esteem, anxiety, gender self-perception and body image, while 36% felt “down or depressed.” Also, 21–23% experienced negative self-perception as friends and parents, 42–47% reported negative effects on plans for romantic and sexual relationships. Responses did not differ with advocacy group membership (p ≥ 0.02). Discussion Our findings support qualitative and case series evidence that clitoromegaly has a negative psychological outcome on women with CAH. Clitoromegaly may add to the burden of living with a chronic endocrine disease. Women with positive and negative experiences had the same opportunity to participate. Since we could not assess objective clitoral size, baseline virilization and exact nature of any childhood clitoral procedures, these data cannot be used to estimate the impact of specific clitoral size or effectiveness of early clitoral treatments. Conclusions Clitoromegaly appears to be common among women with CAH. While experiences of clitoromegaly vary between women, the overall experience is negative in multiple social, romantic, and emotional activities and domains.
Incidence of pathologic postobstructive diuresis after resolution of ureteropelvic junction obstruction with a normal contralateral kidney
(Elsevier, 2018) Roth, Joshua D.; Lesier, Jeffrey D.; Casey, Jessica T.; Szymanski, Konrad M.; Whittam, Benjamin M.; Misseri, Rosalia; Rink, Richard C.; Cain, Mark P.; Pediatrics, School of Medicine
Introduction Postobstructive diuresis (POD) after unilateral pyeloplasty or percutaneous nephrostomy (PCN) tube insertion for ureteropelvic junction obstruction (UPJO) in patients with a normal contralateral kidney is not well described. Objective The objective of this study was to determine the incidence and characteristics of POD after relief of unilateral UPJO in patients with a normal contralateral kidney. Study design Children who underwent a unilateral pyeloplasty or PCN for UPJO from 2010 to 2017 with a normal contralateral kidney were retrospectively reviewed. Postobstructive diuresis was defined as urine output (UO) of >300% of expected UO. Patients with a solitary kidney or those who underwent bilateral pyeloplasty or bilateral PCN tube placement were excluded. Results Out of 396 children meeting inclusion criteria, seven (1.8%) developed POD (4 after pyeloplasty and 3 after PCN tube placement). Median age at intervention was 1.7 years (range 11 days–18 years); median weight was 11.4 kg (range 3.7–54.2 kg). Postobstructive diuresis was more likely to occur in patients with grade 4 hydronephrosis (3.0%) and larger kidneys and if a PCN tube was placed before pyeloplasty. There was no significant difference in age, gender, kidney laterality, or function between those who developed POD and those who did not. Postobstructive diuresis was managed with additional intravenous fluids and electrolyte monitoring. Median initial postprocedure UO was 5.9 mg/kg/hr (range 3.2–10.0 mg/kg/hr). In five children who underwent PCN in whom UO could be differentiated between kidneys, median initial postprocedure UO was 6.1 mg/kg/hr (range 2.5–9.1 mg/kg/hr) from the affected side and 0.8 mg/kg/hr (range 0.4–0.9 mg/kg/hr) from the unaffected side. The median length of time to resolution of POD was 3 days (range 2–4 days). One patient developed significant acidosis and lethargy that improved with intravenous fluid management. Mild hyponatremia developed in two, hypokalemia in one, hypophosphatemia in one, acidosis in one, and hypoglycemia in 1 patient. Discussion A low but clinically significant risk of POD occurring after relief of unilateral UPJO in children with a normal contralateral kidney is described. Limitations include retrospective analysis and small sample size due to the rarity of the condition. Conclusion Postobstructive diuresis after decompression of UPJO in patients with a normal contralateral kidney is a rare event (1.8%). However, POD does occur, and patients should be carefully monitored after these procedures given the potential for significant dehydration and electrolyte disturbances.
Linguistic, Content and Face Validity of the Swedish Version of a Quality-of-Life Assessment for Children, Teenagers and Adults with Spina Bifida
(MDPI, 2024-05-15) Dellenmark-Blom, Michaela; Andersson, Marie; Szymanski, Konrad M.; Andréasson, Charlotta Levén; Arnell, Magdalena Vu Minh; Sjöström, Sofia; Abrahamsson, Kate; Pediatrics, School of Medicine
Spina bifida includes a spectrum of different neural tube defects. Myelomeningocele is the most serious type and is associated with a risk of paralysis and sensory dysfunction below the affected level, bladder/bowel dysfunction, brain dysmorphology, and impaired health-related quality of life (HRQoL). The aim of this study was to describe the establishment of linguistic, content and face validity of the Swedish version of a Quality-of-Life Assessment for children (QUALAS-C, n = 10 items), teenagers (QUALAS-T, n = 10 items) and adults with spina bifida (QUALAS-A, n = 15 items) based on the original US English versions. The process included close collaboration with the original instrument developer and complied with international standards on patient-reported outcome measurements. The procedure includes forward translation, expert and patient/parent review and reconciliation, back translation, back translation review and cognitive debriefing interviews with 16 people with spina bifida aged 8 to 33, providing them with the possibility of evaluating the clarity, adequacy, and comprehensiveness of QUALAS-C, QUALAS-T and QUALAS-A, respectively. The interviews lasted a median of 15 min (range 8–16) for QUALAS-C, 10 min (range 9–15) for QUALAS-T and 24 min (range 9–38) for QUALAS-A. Four main issues/topics needed attention and discussion after both the forward and back translation. Following the back translation review, all issues were resolved. The patient feedback revealed recognition of the HRQoL issues included in QUALAS, and also difficulties in understanding some questions. After the patients’ evaluation, four items were reworded for clarity. No study participant reported a wish to add to or remove questions from QUALAS. Hence, the Swedish versions of QUALAS became conceptually equivalent to the original US English versions and achieved linguistic, content and face validity. While empowering the voices of people with spina bifida, these results also enable their HRQoL to be properly assessed in research and clinical care in Sweden and in international studies.
Long-term outcomes of catheterizable continent urinary channels: what do you use, where you put it and does it matter?
(Elsevier, 2015-08) Szymanski, Konrad M.; Whittam, Benjamin; Misseri, Rosalia; Flack, Chandra K.; Hubert, Katherine C.; Kaefer, Martin; Rink, Richard C.; Cain, Mark P.; Department of Urology, IU School of Medicine
Introduction Appendicovesicostomy (APV) and Monti ileovesicostomy (Monti) are commonly used catheterizable channels with similar outcomes on short-term follow-up. Their relative long-term results have not been previously published. Objective Our goal was to assess long-term durability of APV and Monti channels in a large patient cohort. Study design In this retrospective cohort study, we retrospectively reviewed consecutive patients ≤21 years old undergoing APV and Monti surgery at our institution (1990–2013). We collected data on demographics, channel type, location, continence and stomal and subfascial revisions. Kaplan–Meier survival and Cox proportional hazards analysis were used. Results Of 510 patients meeting inclusion criteria, 214 patients had an APV and 296 had a Monti (50.5% spiral Monti). Median age at surgery was 7.4 years for APV (median follow-up: 5.7 years) and 8.7 years for Monti (follow-up: 7.7 years). Stomal stenosis, overall stomal revisions and channel continence were similar for APV and Monti (p ≥ 0.26). Fourteen APVs (6.5%) had subfascial revisions compared to 49 Montis (16.6%, p = 0.001). On survival analysis, subfascial revision risk at 10 years for APV was 8.6%, Monti channels excluding spiral umbilical Monti: 15.5% and spiral umbilical Monti: 32.3% (p < 0.0001, Figure). On multivariate regression, Monti was 2.09 times more likely than APV to undergo revision (p = 0.03). The spiral Monti to the umbilicus, in particular, was 4.23 times more likely than APV to undergo revision (p < 0.001). Concomitant surgery, gender, age and surgery date were not significant predictors of subfascial revision (p ≥ 0.17). Stomal location was significant only for spiral Montis. Discussion Our study has several limitations. Although controlling for surgery date was a limited way of adjusting for changing surgical techniques, residual confounding by surgical technique is unlikely, as channel implantation technique was typically unrelated to channel type. We did not include complications managed conservatively or endoscopically. In addition, while we did not capture patients who were lost to follow-up, we attempted to control for this through survival analysis. Conclusions We demonstrate, durable long-term results with the APV and Monti techniques. The risk of channel complications continues over the channel's lifetime, with no difference in stomal complications between channels. At 10 years after initial surgery, Monti channels were twice as likely to undergo a subfascial revision (1 in 6) than APV (1 in 12). The risk is even higher in for the spiral umbilical Monti (1 in 3).

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