Penile urethral resection and anastomosis augmentation with regional tissue tension relieving technique: A cadaveric mechanical study and clinical outcome in two dogs

Bertran, Judith; Ham, Kathleen; Gibson, Jordan F.; Litsky, Alan S.; Kieves, Nina R.

doi:10.1111/vsu.13614

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…14 The duration of postoperative urinary catheterization differed between dogs in our study. The duration of catheterization to treat a urethral tear is controversial, 15 with recommendations varying between 5 16 and 21 days. 17 These guidelines concern healing time after urethral tear and not after anastomosis.…”

Section: Discussionmentioning

confidence: 99%

Preputial urethrostomy with preservation of the local anatomy in 4 dogs

et al. 2022

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Objective: To describe a novel modified preputial urethrostomy with preservation of the local anatomy in 4 dogs.Study design: Short case series. Animals: Four client-owned male dogs. Methods: Dogs presented for dysuria and urethral obstruction and underwent a modified preputial urethrostomy as a salvage procedure after the failure of previous treatments. Urethral stenosis or tear was confirmed by cystourethrography in all dogs. The preputial urethrostomy involved anastomosis of the pelvic urethra with the preputial mucosa after caudal laparotomy, without dissection of the prepuce or amputation of the penis. Owner follow up was obtained by telephone interview.Results: Urinary obstruction was due to urethral stenosis in 3 dogs and severe complications following perineal urethrostomy in 1 dog. The urinary obstruction was resolved in all dogs by the modified preputial urethrostomy. None of the dogs had signs of dysuria, urinary tract infection, or dermatitis immediately postoperatively. Two dogs showed signs of urinary incontinence from 15 days to 1 month postoperatively, which persisted throughout the follow-up period. Conclusion:A functional urethral stoma was obtained in all dogs. This technique may be an alternative to prepubic urethrostomy in male dogs.

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Section: Discussionmentioning

confidence: 99%

Preputial urethrostomy with preservation of the local anatomy in 4 dogs

et al. 2022

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The role of tissue biomechanics in the implantation and performance of inflatable penile prostheses: current state of the art and future perspective

Bose,

Fereidoonnezhad,

Akbarzadeh Khorshidi

et al. 2023

Sexual Medicine Reviews

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Introduction Erectile dysfunction (ED) affects to some degree approximately 52% of the male population aged 40–70 years. Many men do not respond to, or are precluded from using, pharmaceutical treatments for ED and are therefore advised to consider penile prostheses. Different types of penile prosthesis are available, such as inflatable penile prostheses (IPPs). IPPs consist of a pair of inflatable cylinders inserted into the corpora cavernosa (CC). During inflation/deflation of these cylinders, the CC and other surrounding tissues such as the tunica albuginea (TA) are highly impacted. Therefore, it is critical to understand the mechanics of penile tissues for successful implantation of IPPs and to reduce tissue damage induced by IPPs. Objectives We explored the importance of the biomechanics of penile tissues for successful IPP function and reviewed and summarized the most significant studies on penile biomechanics that have been reported to date. Methods We performed an extensive literature review of publications on penile biomechanics and IPP implantation. Results Indenters have been used to characterize the mechanical behavior of whole penile tissue; however, this technique applied only local deformation, which limited insights into individual tissue components. Although one reported study addressed the mechanical behavior of TA, this investigation did not consider anisotropy, and there is a notable absence of biomechanical studies on CC and CS. This lack of understanding of penile tissue biomechanics has resulted in computational models that use linear-elastic materials, despite soft tissues generally exhibiting hyperelastic behavior. Furthermore, available benchtop/synthetic models do not have tissue properties matched to those of the human penis, limiting the scope of these models for use as preclinical testbeds for IPP testing. Conclusion Improved understanding of penile tissue biomechanics would assist the development of realistic benchtop/synthetic and computational models enabling the long-term performance of IPPs to be better assessed.

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Ex vivo biomechanical evaluation of tissue construct strength in an equine colopexy model

Gaitan,

Mudge,

Litsky

et al. 2024

Veterinary Surgery

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ObjectiveTo compare strength of left paramedian colopexies using various techniques in equine ex vivo models.Study designExperimental study.Sample populationEquine cadavers euthanized for nongastrointestinal pathology (36 specimens derived from 9 horses).MethodsColopexies were performed after euthanasia. Suture pattern (horizontal mattress vs. cruciate) and incorporation of dorsal sheath of the rectus abdominis (partial‐thickness) versus incorporation of dorsal and ventral sheath of the rectus abdominis (full‐thickness) were evaluated. Single cycle load to failure, work to peak load, stiffness, and mode of failure of colopexy tissue constructs were assessed.ResultsMean load to failure of all constructs ranged from 102.26 to 166.38 N. Partial‐thickness bites demonstrated a mean load to failure and standard deviation (SD) of 111.91 (35.88) N and 102.26 (30.06) N (p < .05) which was significantly lower than the mean and SD of full‐thickness bites (166.3 [72.42] N and 163.21 [51.40 N]), respectively. All full‐thickness bites regardless of suture pattern and over half of partial‐thickness bites failed at the colonic wall. There was no significant difference in load to failure compared to mode of failure.ConclusionA stronger colopexy was achieved with a full‐thickness bite regardless of the suture pattern. The most common mode of failure was the colon wall.Clinical significanceIncorporating ventral and dorsal fascia of the rectus abdominus provided a stronger colopexy structure, which may necessitate a second incision or subcutaneous palpation of the needle when performing a colopexy. The lateral band of the colon failed in most constructs (77%) regardless of technique, which could weaken the colonic wall and risk colonic rupture.

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Penile urethral resection and anastomosis augmentation with regional tissue tension relieving technique: A cadaveric mechanical study and clinical outcome in two dogs

Cited by 3 publications

References 18 publications

Preputial urethrostomy with preservation of the local anatomy in 4 dogs

Preputial urethrostomy with preservation of the local anatomy in 4 dogs

The role of tissue biomechanics in the implantation and performance of inflatable penile prostheses: current state of the art and future perspective

Ex vivo biomechanical evaluation of tissue construct strength in an equine colopexy model

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