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Related Concept Videos

Muscles of the Pelvic Floor and Perineum01:26

Muscles of the Pelvic Floor and Perineum

The muscles of the pelvic floor and perineum are crucial for supporting the pelvic organs, controlling continence, and aiding in sexual function, childbirth, and core stability. They are typically divided into the superficial perineal layer and the deep pelvic floor layer.
Perineal Layer
The perineum is a diamond-shaped area below the pelvic diaphragm, divided into an anterior urogenital triangle that contains the external genitals and a posterior anal triangle housing the anus. The urogenital...

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Related Experiment Video

Updated: Jul 2, 2026

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique
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Published on: January 6, 2023

Surgical anatomy for pelvic external fixation.

L B Solomon1, A P Pohl, M J Chehade

  • 1Department of Orthopaedics and Trauma, Royal Adelaide Hospital and University of Adelaide, Adelaide, South Australia, Australia. bogdansolomon@mac.com

Clinical Anatomy (New York, N.Y.)
|September 6, 2008
PubMed
Summary
This summary is machine-generated.

Subcristal pin placement for pelvic external fixation is recommended to minimize complications. This study analyzed iliac morphology and pin configurations, finding subcristal pins offer the most reliable positioning compared to anterosuperior and anteroinferior options.

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Area of Science:

  • Orthopedic surgery
  • Anatomy
  • Medical imaging

Background:

  • Pelvic external fixators are crucial for stabilizing severe pelvic fractures.
  • Complications associated with pelvic external fixation often stem from inaccurate pin placement.

Purpose of the Study:

  • To analyze iliac bone morphology and its relationship with common pelvic external fixator pin configurations.
  • To identify optimal pin placement strategies for reducing complications in pelvic external fixation.

Main Methods:

  • Descriptive analysis of iliac morphology in cadaveric specimens.
  • Comparison with measurements from human pelvic CT scans.
  • Evaluation of three pin positioning configurations: anterosuperior, anteroinferior, and subcristal.

Main Results:

  • Anterosuperior pin placement is challenged by iliac wing morphology and abdominal wall thickness.
  • Anteroinferior pin placement presents risks due to the deep anterior inferior iliac spine and potential hip joint penetration.
  • Subcristal pin placement, utilizing superficial iliac crest landmarks, demonstrated a higher likelihood of accurate placement.

Conclusions:

  • Subcristal pin positioning is suggested as a safer and more reliable method for pelvic external fixation.
  • Understanding pelvic anatomy is critical for optimizing pin placement and minimizing complications.
  • Further research could validate these findings and refine surgical techniques.