Urethrocutaneous fistula complicates 5 to 15 percent of primary hypospadias repairs and a higher share of revisions. No clinical trials test hyperbaric oxygen therapy (HBOT) for these complications. The evidence is case-level: reports and a multicenter registry where hyperbaric oxygen was used to rescue an ischemic flap or prepare a poorly vascularized bed before re-repair. HBOT here is a targeted rescue in a compromised wound, not routine post-operative care.
Why do hypospadias repairs develop wound complications?
Hypospadias repair reconstructs the urethra using local tissue flaps, most often from the foreskin or adjacent penile skin. That new urethra is covered by thin, surgically repositioned tissue that has to establish fresh blood supply quickly to survive. When perfusion falls short, the repair breaks down.
Urethrocutaneous fistula is the most common complication after hypospadias repair, according to a 2026 systematic review and meta-analysis by Khosravi and colleagues in the Journal of Pediatric Surgery.1 Reported fistula rates cluster around 5 to 15 percent for primary repairs and run higher after revision, where scarring and previous surgery leave local tissue less predictable. Wound dehiscence (the wound reopening) and flap or graft ischemia are less common but more urgent, because dusky, poorly perfused tissue can progress to necrosis within days.
Urethrocutaneous fistula rate after primary hypospadias repair, the most common complication and higher after revision surgery
Khosravi et al., J Pediatr Surg, 2026
Key terms
- Urethrocutaneous fistula: an abnormal opening between the reconstructed urethra and the skin surface, leaking urine.
- Dehiscence: a surgical wound that reopens along its repair line before it has healed.
- Flap ischemia: inadequate blood flow to a tissue flap, seen as dusky color and slow capillary refill, risking tissue death.
- Compromised graft or flap: a graft or flap whose survival is threatened by poor perfusion, a recognized indication for adjunctive HBOT.
What does the evidence show for HBOT in hypospadias?
No randomized trials or controlled studies test HBOT specifically for hypospadias complications. The support is indirect and case-level. The strongest anchor is the general indication: hyperbaric oxygen is a covered treatment for compromised skin grafts and flaps under Medicare National Coverage Determination 20.29, the same physiology that applies to a threatened hypospadias flap.2
The mechanism is oxygen delivery to ischemic tissue. Under pressure, oxygen dissolves into plasma and reaches tissue that a fragile blood supply cannot fully perfuse, supporting flap survival and stimulating angiogenesis, the growth of new blood vessels. Thom’s 2011 review in Plastic and Reconstructive Surgery details how hyperbaric oxygen reduces ischemia-reperfusion injury and supports flap survival.3
That HBOT is used for hypospadias at all is documented: the 2024 International Multicenter Registry for Hyperbaric Oxygen Therapy (Tanaka et al.) lists hypospadias repair among the emerging, off-label indications centers are treating and tracking.4 This is a record of real-world use, not proof of benefit. Published case reports describe early post-operative HBOT after signs of tissue compromise (dusky flap color, reduced capillary refill, early separation) where the tissue recovered enough to avoid reoperation, and cases where HBOT improved the tissue bed before planned revision.
Emerging, off-label HBOT indications documented in a 9,726-patient international registry, with hypospadias repair named among them
Tanaka et al., Interactive Journal of Medical Research, 2024
Hypospadias complications and the rationale for HBOT
| Complication | Typical rate | HBOT role |
|---|---|---|
| Urethrocutaneous fistula | 5 to 15% of primary repairs, higher in revision | Optimize tissue quality before or after surgical closure, not to close the tract directly |
| Flap or graft ischemia | Less than 5% | Urgent salvage of threatened tissue (Medicare/UHMS compromised-flap indication) |
| Wound dehiscence | Variable, higher in complex cases | Prepare a poorly vascularized bed for re-repair |
Fistula rates and complication profiles by technique are detailed in Qureshi and colleagues’ 2025 analysis of tubularized incised plate urethroplasty.5 The honest summary: HBOT for hypospadias is a plausible rescue drawn from the broader wound-healing and flap-salvage evidence, applied when the alternative is watching tissue fail. The general principles are covered in our wound healing guide and post-surgical healing article.
Is HBOT safe for infants and young children?
Hyperbaric oxygen has been delivered safely to infants and young children in appropriate clinical settings, but pediatric treatment adds real complexity. Most hypospadias repairs happen in infants and young children, who usually cannot cooperate with a 60 to 90 minute chamber session without sedation or anesthesia. Mild sedation can be used in hyperbaric settings, but it adds risk that has to be weighed against the potential benefit.
Multiplace chambers, which let an attendant stay inside with the patient, are generally preferred for pediatric HBOT. Some centers adapt protocols with shorter sessions or progressive acclimation. The decision to treat a young child should involve pediatric anesthesia and hyperbaric medicine expertise together. Adults undergoing hypospadias repair or revision do not face the same sedation concerns, and those with added risk factors for poor healing (diabetes, smoking history, prior radiation) are the group most likely to be considered for adjunctive HBOT if complications arise.
The FDA notes that hyperbaric oxygen is promoted for many uses that are not proven, and cautions consumers to use it only for recognized indications under medical supervision.6 Standard wound-healing parameters (2.0 to 2.4 ATA, 60 to 90 minutes, response assessed after 10 to 15 sessions) would apply. Our session guide covers what treatment involves, though the pediatric experience differs meaningfully from adult care.
How do you decide with your surgeon?
The decision to pursue HBOT for a hypospadias wound complication should be made with the operating surgeon, who knows the flap type used, the tissue quality encountered, and the degree of healing risk observed. That detail is what the hyperbaric physician needs to judge whether HBOT is appropriate and how urgently to start it. Early referral, within days of identifying flap compromise, gives HBOT the best chance of preserving tissue before irreversible necrosis. Hospital-based hyperbaric programs at children’s hospitals or major academic centers are the appropriate setting.
HBOT cannot promise a specific outcome here. It aims to improve the odds in a situation that is already difficult. Many children who experience fistulas or dehiscence still go on to successful revision with good functional results, and the goal of acute management is to preserve tissue and create the best possible bed for any repair that follows.
How old does a child need to be for HBOT?
There is no strict minimum age. Infants and very young children have received HBOT in appropriate clinical settings, usually with sedation. The decision depends on clinical necessity, the center’s capability to manage pediatric patients, and whether the risk-benefit balance favors treatment for the specific complication. Pediatric HBOT is a subspecialty, so a children’s hospital or academic hyperbaric program is the right setting.
Can HBOT close a hypospadias fistula without surgery?
This is unlikely for an established fistula. Once a tract has formed and epithelialized (developed a lining), it generally needs surgical closure. HBOT’s role is to optimize tissue quality before or after that surgery, not to close the fistula through oxygen delivery alone. A 2026 report by Simanjuntak and colleagues describes non-operative management of small early fistulas, but this is distinct from HBOT closing an established tract.
Is HBOT covered by insurance for hypospadias complications?
Coverage is possible only if the complication is documented as a recognized indication, such as a compromised skin graft or flap under Medicare NCD 20.29. The hypospadias complication itself has to be framed in those terms for coverage to apply. Our insurance guide explains how to navigate this, and the cost guide covers out-of-pocket figures.
What pressure and session count would be used?
Standard wound-healing protocols apply: 2.0 to 2.4 ATA for 60 to 90 minutes per session. Session count depends on wound response, typically reassessed after 10 to 15 sessions with continuation if measurable improvement is documented. When perfusion of the repair is compromised, hyperbaric oxygen delivers oxygen to the ischemic tissue and stimulates new blood vessel growth to support healing.
Sources
- Khosravi R, Alizadeh H, Khosravi M, et al. “Risk factors for urethrocutaneous fistula following primary hypospadias repair in children: A systematic review and meta-analysis.” Journal of Pediatric Surgery, 2026. doi:10.1016/j.jpedsurg.2026.162928
- Centers for Medicare & Medicaid Services. “National Coverage Determination (NCD) for Hyperbaric Oxygen Therapy (20.29).” CMS.gov
- Thom SR. “Hyperbaric Oxygen: Its Mechanisms and Efficacy.” Plastic and Reconstructive Surgery, 2011;127 Suppl 1:131S-141S. doi:10.1097/PRS.0b013e3181fbe2bf
- Tanaka HL, Rees JR, Zhang Z, et al. “Emerging Indications for Hyperbaric Oxygen Treatment: Registry Cohort Study.” Interactive Journal of Medical Research, 2024;13:e53821. doi:10.2196/53821. PMID: 39078624
- Qureshi WA, Jelani U, Fazeel H, et al. “Complications of Tubularized Incised Plate Urethroplasty and Spongioplasty.” Cureus, 2025. PMID: 41257130
- U.S. Food and Drug Administration. “Hyperbaric Oxygen Therapy: Get the Facts.” FDA Consumer Update. fda.gov
Medical Disclaimer
The content on BaricBoost.com is for informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
Author
Seph Fontane Pennock is the founder of BaricBoost.com and Regenerated.com, a clinic directory for regenerative medicine serving 10,000+ providers across the United States. He previously built and sold PositivePsychology.com, which grew to 19 million users and became the largest evidence-based positive psychology resource on the web. Seph brings direct experience as an HBOT patient, having completed protocols at clinics across three continents while navigating mold illness, systemic inflammation, and autoimmune conditions. His treatment journey includes hyperbaric oxygen therapy, peptide protocols, NAD+ therapy, and consultations with specialists from Dubai to Cape Town to Mexico. This combination of entrepreneurial track record and lived patient experience shapes everything published on BaricBoost.com. Every article is grounded in peer-reviewed research, informed by real clinical encounters, and written for patients making high-stakes treatment decisions. Seph's focus is on bringing transparency, scientific rigor, and practical guidance to the hyperbaric oxygen therapy space.
