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Y-V Plasty

Y-V plasty is an advancement-flap technique in which a Y-shaped incision is made and the triangular flap at the base is advanced into the stem of the Y, converting the wound configuration into a V. This achieves tissue lengthening along the axis of the scar or contracture without undermining or transposing flaps, thereby preserving the subdermal blood supply — a critical advantage over Z-plasty.[1][2] Although best known in genitourinary practice for refractory bladder neck contracture (BNC) and vesicourethral anastomotic stenosis (VUAS), the same geometric principle underlies the Foley Y-V pyeloplasty for ureteropelvic-junction obstruction and the Y-V meatoplasty for post-hypospadias meatal stenosis.

This page is the foundations-level deep dive. The procedure-specific technique pages are listed under See Also.

Geometric Principles​

The fundamental geometry of Y-V plasty involves three elements:

  1. The Y-shaped incision — two limbs diverge from a central point (the upper arms of the Y) and a single stem extends distally. The tissue between the upper limbs forms a triangular (V-shaped) flap.
  2. Advancement mechanism — the triangular flap slides forward along its substratum (without being lifted off its base) into the stem of the Y. This converts the Y into a V configuration, lengthening the tissue along the axis of the original stem.
  3. Blood-supply preservation — unlike Z-plasty, which transposes fully elevated flaps, Y-V plasty displaces tissue by sliding it on its subcutaneous pedicle. Perfusion is maintained, and the risk of flap-tip necrosis is low — particularly important in scarred or irradiated tissue.[1][3]

Mathematical analysis​

For a multiple Y-V plasty applied to a rectangular scar of length l and width a, the gain in length simplifies to:

Gain  =  (l × x) / a

where x is the advancement distance of the triangular flap. Neither the angles of the Y incisions nor the number of triangles affects the ultimate length gained — only the advancement distance x determines the final lengthening.[4]

Y-V vs. V-Y plasty — directional distinction​

These are the same geometric principle applied in opposite directions:

OperationIncision → closureEffectTypical use
Y-V plastyY → VLengthens along the axis of the stemRelease contractures and stenoses
V-Y plastyV → YAdvances tissue into a defectClose wounds; fill defects (vulvar, perineal, scrotal V-Y advancement)
[5][6]

Applications in Plastic Surgery​

Burn-scar contracture release is the classic indication. The "running Y-V plasty" technique uses multiple parallel Y-shaped incisions across a linear scar cord; each triangular flap slides into its respective stem, collectively lengthening the entire contracture without undermining.[1][3]

Key advantages:

  • Extremely low wound-morbidity and flap-necrosis rates compared with Z-plasty[3]
  • Applicability to cord-like or linear contractures of the axilla, extremities, and trunk[2][7]
  • The opposite running Y-V plasty variant uses Y-V flaps from both sides of a broad contracture band, particularly useful for axillary contractures[7]
  • The procedure can be repeated when the initial release is insufficient[7]

Other plastic-surgery applications include release of nostril stenosis, congenital soft-tissue shortening, nasal-tip / alar resurfacing, and supplemental release after Z-plasty.[2][8]

Applications in Urology​

The same geometric principle — advancing healthy tissue into a stenotic or contracted segment — has been adapted across the GU tract.

1. Refractory Bladder Neck Contracture (BNC) and VUAS​

This is the dominant urologic application. Y-V plasty is considered a definitive reconstructive option for refractory BNC / VUAS that has failed endoscopic management — typically defined as ≥ 2 failed endoscopic procedures (dilation, transurethral incision, steroid or mitomycin C injection).[9][10]

Technique​

A Y-shaped incision is made on the anterior bladder wall, with the stem extending through the contracture into healthy urethra. The V-shaped bladder flap is advanced distally to widen the bladder neck, and fibrotic tissue is excised.[11][12]

ApproachNotes
Open Y-V plastyMidline lower-abdominal exposure; full-thickness Y incision through the contracture into healthy bladder; V-flap advanced; layered closure
Extraperitoneal laparoscopic modified Y-VBarbed suture; reduced operative time and anastomotic-leak rate vs. open[12]
Robotic Y-V plasty (RAYV / RYVBNR)Transperitoneal robotic approach; Firefly (ICG) fluorescence localizes the contracture in the scarred field; median operative time ~240 min[10][13]
Endoscopic Y-V plastyCystoscopic incision plus intraluminal suturing — no abdominal incision; 89% success after one procedure, 100% after a second[14]

Outcomes​

OutcomeRange across series
Open Y-V plasty success100% in an 18-patient series (mean follow-up 14.8 mo)[9]
Robotic Y-V plasty success100% at median 8 mo in 7 patients (Granieri)[10]; 83.3% at 24 mo in 30 patients (Abo Youssef RAYV) with IPSS 17 → 6, PVR 90 → 0 mL, Qmax 7.4 → 17 mL/s[13]
Continence retained87–90%[10][13]
Persistent storage symptoms61% post-Y-V plasty; baseline BMI and IPSS are independent predictors[9]

Persistent storage symptoms reflect underlying detrusor pathology rather than surgical failure — important to discuss before surgery.

2. Foley Y-V Pyeloplasty for Ureteropelvic Junction Obstruction​

The Foley Y-V pyeloplasty is the classic non-dismembered technique for UPJ obstruction:[15][16]

  • A Y-shaped incision is made with the stem crossing the stenotic UPJ and the arms extending onto the renal pelvis
  • The resulting V-flap of pelvic wall is advanced across the obstruction
  • Laparoscopic Y-V pyeloplasty achieves success rates of 86–97%, comparable to the Anderson-Hynes dismembered technique (88–95%)[15][16][17]
  • Particularly valuable for patients with a small or intrarenal pelvis where dismembered pyeloplasty is technically difficult[16]
  • A modification extending the cranial limbs in an elliptic fashion allows simultaneous reduction of a hydronephrotic pelvis[18]
  • Not ideal when crossing vessels are present (dismembered pyeloplasty preferred in that setting)[19]

See Pyeloplasty for the full technique page.

3. Y-V Meatoplasty for Meatal Stenosis​

Y-V meatoplasty has been described for post-hypospadias meatal stenosis:[20][21]

  • A small inverted V-flap is elevated at the meatal tip
  • The stenotic ring is excised
  • The flap is advanced into the widened meatus, interrupting the circumferential scar line
  • A 57-patient series reported 96.5% success with median 4-year follow-up[20]

4. Y-V Glanuloplasty in Distal Hypospadias Repair​

Y-V glanuloplasty has been used as part of distal hypospadias repair, where a Y-shaped glans incision is converted to a V to accommodate the advanced urethra.[22]

Indications Across the GU Tract​

  • Refractory BNC after ≥ 2 failed endoscopic treatments
  • VUAS after radical prostatectomy
  • Bladder-neck stenosis after TURP or holmium enucleation
  • UPJ obstruction, especially with small or intrarenal pelvis (Foley Y-V pyeloplasty)
  • Post-hypospadias meatal stenosis (Y-V meatoplasty)
  • Distal hypospadias as part of glanuloplasty
  • Can be combined with AUS placement in patients with concurrent post-prostatectomy stress incontinence

Contraindications and Caveats​

  • Active infection at the operative site
  • Extensive bladder-neck calcification — may require adjunctive debridement
  • Heavily irradiated field — consider omental flap interposition at the time of repair
  • Crossing vessels at the UPJ — favor dismembered Anderson-Hynes pyeloplasty[19]
  • Patient expectation management — 61% persistent storage symptoms after Y-V plasty for BNC is not surgical failure but reflects underlying detrusor pathology[9]

Technical Pearls​

  • Extend the Y well into healthy tissue — V-flap advancement only works if the triangle has perfusion and lax tissue beyond the stenotic segment
  • Full-thickness incision is required — partial-thickness closure recontracts
  • Robotic ICG fluorescence substantially shortens the learning curve in the scarred post-prostatectomy field
  • Concurrent vs. staged AUS — concurrent AUS is reasonable in patients with established stress incontinence; staged AUS after Y-V plasty healing (usually 3–6 months) is the alternative
  • The mathematical insight that lengthening depends only on advancement distance x — not on the angle of the Y or the number of triangles — should reassure the surgeon that an aggressive but safe advancement, not perfectionist angle planning, is what determines the final result[4]

Summary of Advantages Across Applications​

  • Preserves blood supply by avoiding flap elevation and transposition
  • Mathematically predictable lengthening
  • Low necrosis and complication rates
  • Repeatable when the initial result is insufficient
  • Adaptable to open, laparoscopic, robotic, and endoscopic approaches

See Also​

References​

1. Olbrisch RR. "Running Y-V Plasty." Ann Plast Surg. 1991;26(1):52–56. doi:10.1097/00000637-199101000-00008

2. Shaw DT, Li CS. "Multiple Y-V Plasty." Ann Plast Surg. 1979;2(5):436–440. doi:10.1097/00000637-197905000-00013

3. Lai CS, Lin SD, Tsai CC, Tsai CW. "Running Y-V Plasty for Burn Scar Contracture." Burns. 1995;21(6):458–462. doi:10.1016/0305-4179(95)00019-8

4. van Niekerk WJ, Taggart I. "The Size of the Y: The Multiple Y-V Plasty Revisited." Burns. 2008;34(2):257–261. doi:10.1016/j.burns.2007.03.019

5. Andrades PR, Calderon W, Leniz P, et al. "Geometric Analysis of the V-Y Advancement Flap and Its Clinical Applications." Plast Reconstr Surg. 2005;115(6):1582–1590. doi:10.1097/01.prs.0000160693.82527.d4

6. Pauchot J, Chambert J, Remache D, Elkhyat A, Jacquet E. "Geometrical Analysis of the V-Y Advancement Flap Applied to a Keystone Flap." J Plast Reconstr Aesthet Surg. 2012;65(8):1087–1095. doi:10.1016/j.bjps.2012.03.004

7. Lin TM, Lee SS, Lai CS, Lin SD. "Treatment of Axillary Burn Scar Contracture Using Opposite Running Y-V Plasty." Burns. 2005;31(7):894–900. doi:10.1016/j.burns.2005.04.028

8. Burm JS, Yang WY. "Modification of Running Y-V Plasty to Correct Bilateral Nostril Stenosis With a Circular, Linear Contracture." J Plast Reconstr Aesthet Surg. 2011;64(12):1665–1668. doi:10.1016/j.bjps.2011.04.038

9. Shamout S, Yao HHI, Mossa AH, Carlson KV, Baverstock RJ. "Persistent Storage Symptoms Following Y-V Plasty Reconstruction for the Treatment of Refractory Bladder Neck Contracture." Neurourol Urodyn. 2022;41(5):1082–1090. doi:10.1002/nau.24941

10. Granieri MA, Weinberg AC, Sun JY, Stifelman MD, Zhao LC. "Robotic Y-V Plasty for Recalcitrant Bladder Neck Contracture." Urology. 2018;117:163–165. doi:10.1016/j.urology.2018.04.017

11. Masumoto H, Horiguchi A, Shinchi M, et al. "Effectiveness of Y-V Plasty for Refractory Bladder Neck Stenosis After Transurethral Prostate Surgery." Int J Urol. 2025;32(4):434–440. doi:10.1111/iju.15676

12. Zang Z, Shao D, Zhang H, et al. "Extraperitoneal Laparoscopic Modified Y-V Plasty for the Treatment of Refractory Bladder Neck Contracture." J Vis Exp. 2022;(184). doi:10.3791/64011

13. Abo Youssef N, Obrecht F, Padevit C, Brachlow J, John H. "Short and Intermediate-Term Outcome of Robot-Assisted Inverted YV-Plasty for Recurrent Bladder Neck Stenosis — A Single Centre Study." Urology. 2023;175:196–201. doi:10.1016/j.urology.2023.02.011

14. Abramowitz DJ, Balzano FL, Ruel NH, Chan KG, Warner JN. "Transurethral Incision With Transverse Mucosal Realignment for the Management of Bladder Neck Contracture and Vesicourethral Anastomotic Stenosis." Urology. 2021;152:102–108. doi:10.1016/j.urology.2021.02.035

15. Szydełko T, Kasprzak J, Lewandowski J, Apoznański W, Dembowski J. "Dismembered Laparoscopic Anderson-Hynes Pyeloplasty Versus Nondismembered Laparoscopic Y-V Pyeloplasty in the Treatment of Patients With Primary Ureteropelvic Junction Obstruction: A Prospective Study." J Endourol. 2012;26(9):1165–1170. doi:10.1089/end.2011.0642

16. Szydełko T, Kasprzak J, Apoznański W, Zdrojowy R. "Laparoscopic Anterior Y-V Pyeloplasty: A Valuable Treatment Option in Patients With Small or Intrarenal Pelvis." J Laparoendosc Adv Surg Tech A. 2010;20(7):627–630. doi:10.1089/lap.2010.0223

17. Szydełko T, Kasprzak J, Apoznański W, et al. "Comparison of Dismembered and Nondismembered Y-V Laparoscopic Pyeloplasty in Patients With Primary Hydronephrosis." J Laparoendosc Adv Surg Tech A. 2010;20(1):7–12. doi:10.1089/lap.2009.0210

18. Tsivian A, Tsivian M, Sidi AA. "The Y-V Pyeloplasty Revisited." Urology. 2010;75(1):200–202. doi:10.1016/j.urology.2009.08.062

19. Amón Sesmero JH, Delgado MC, de la Cruz Martín B, et al. "Laparoscopic Pyeloplasty: Always Dismembered?" J Endourol. 2016;30(7):778–782. doi:10.1089/end.2015.0800

20. Sennert M, Fawzy M, Wirmer J, Graumann C, Hadidi AT. "Y-V Meatoplasty: A Simple Novel Technique to Correct Meatal Stenosis." J Sex Med. 2025. doi:10.1093/jsxmed/qdaf236

21. Kim KS, King LR. "Method for Correcting Meatal Stenosis After Hypospadias Repair." Urology. 1992;39(6):545–546. doi:10.1016/0090-4295(92)90013-m

22. Caione P, Capozza N, De Gennaro M, et al. "Distal Hypospadias Repair by Urethral Sliding Advancement and Y-V Glanuloplasty." J Urol. 1991;146(2 Pt 2):644–646. doi:10.1016/s0022-5347(17)37882-5