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Related Concept Videos

Imaging Studies VI: Voiding Cystourethrography and Cystography01:22

Imaging Studies VI: Voiding Cystourethrography and Cystography

Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
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Urodynamic Studies: Uroflowmetry

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Updated: Jun 2, 2026

Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology
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Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology

Published on: November 13, 2014

Voiding prior to parachuting.

Andrew B Hall1, Justin M Sanders, Brad Wheeler

  • 1Keesler Medical Center, Keesler Air Force Base, Mississippi 39534, USA. andrew.hall.2@us.af.mil

Journal of Surgical Education
|April 13, 2011
PubMed
Summary
This summary is machine-generated.

Bladder ruptures during parachute jumps require surprisingly little energy. Military personnel should void before jumping to prevent bladder rupture, as the pressure needed is minimal.

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Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
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Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
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Published on: August 9, 2012

Area of Science:

  • Biomedical Engineering
  • Trauma Research
  • Urology

Background:

  • Isolated bladder ruptures have been reported in military parachutists.
  • Understanding the biomechanics of bladder rupture is crucial for injury prevention.

Purpose of the Study:

  • To determine the energy required to rupture a distended bladder.
  • To provide evidence supporting pre-jump bladder voiding for military parachutists.

Main Methods:

  • Euthanized pig bladders were pressurized via a water column until rupture, with measurements of pressure, dimensions, and volume.
  • An acceleration model simulated impact forces on distended bladders.

Main Results:

  • Mean rupture pressure was 116 mm Hg (SD ± 7).
  • Rupture occurred at maximum bladder elasticity.
  • Significant force is not required to cause bladder rupture.

Conclusions:

  • The energy and pressure needed to rupture a distended bladder are low.
  • Laplace's law applies to bladder rupture.
  • Parachutists should be advised or required to void before jumps to mitigate rupture risk.