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Related Concept Videos

Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

325
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
325
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

555
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
555
Circular Shafts - Elastoplastic Materials01:24

Circular Shafts - Elastoplastic Materials

257
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
257
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

320
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
320

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Microscopic Electric Rotary Grinding of Plaques Combined with Graft Repair in the Management of Peyronie's Disease
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Shaft-only Phalloplasty: Technical Modifications to Optimize Aesthetics.

Blair R Peters1, Eleanor McCreary2, Carley A Putnam1

  • 1Division of Plastic Surgery, Oregon Health & Science University, Portland, Oreg.

Plastic and Reconstructive Surgery. Global Open
|June 25, 2021
PubMed
Summary

Shaft-only phalloplasty (SOP) offers a lower-risk alternative for gender-affirming surgery. Technical modifications enhance aesthetic outcomes by creating a phallic meatus and increasing phallus girth.

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Area of Science:

  • Urology
  • Plastic Surgery
  • Gender-Affirming Care

Background:

  • Shaft-only phalloplasty (SOP) is a less invasive gender-affirming surgery compared to traditional phalloplasty.
  • SOP may be chosen due to lower surgical risks, personal preference, or medical contraindications for more extensive procedures.
  • Aesthetic concerns in SOP include the absence of a distal urethral meatus and potentially reduced phallic bulk.

Purpose of the Study:

  • To review technical modifications for shaft-only phalloplasty (SOP).
  • To address aesthetic limitations of SOP, specifically meatus creation and phallic girth.
  • To improve patient satisfaction with the aesthetic results of SOP.

Main Methods:

  • Adaptation of the tube-within-tube neo-urethral reconstruction technique for distal meatal creation in SOP.
  • Utilization of a lateral de-epithelialized strip to augment phallic bulk and girth when necessary.
  • Review of technical refinements to enhance the aesthetic appearance of the neophallus.

Main Results:

  • Successful creation of a distal phallic meatus in SOP cases.
  • Ability to increase phallic girth and bulk using described techniques.
  • Enhanced aesthetic outcomes and improved surgeon ability to meet patient goals.

Conclusions:

  • Technical modifications can successfully create a phallic meatus in shaft-only phalloplasty.
  • These refinements allow for increased phallic girth, addressing a common aesthetic concern.
  • The described techniques assist surgeons in achieving more aesthetically pleasing results in SOP.