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Bladder function in the aged rat: a functional and morphological study

G Italiano1, A Calabrò, W Artibani

  • 1Institute of Urology, University of Padua, Italy.

European Urology
|January 1, 1995
PubMed
Summary
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Aging urinary bladder function in rats shows increased volume and mass. Altered sensory information in aged rats contributes to abnormal cystometric findings, unlike in hyperdiuretic rats.

Area of Science:

  • Urology
  • Gerontology
  • Physiology

Background:

  • Urinary bladder function can change with age.
  • Aging may affect bladder capacity and structure.
  • Understanding age-related bladder changes is crucial for geriatric care.

Purpose of the Study:

  • To characterize urinary bladder function in aged rats.
  • To compare aged rats with normal and hyperdiuretic young rats.
  • To investigate the role of sensory information in age-related bladder dysfunction.

Main Methods:

  • Cystometry was performed on aged (27 months) and young (6 months) rats.
  • Groups included normal and hyperdiuretic young rats for comparison.
  • Bladder mass, micturition threshold volume, intravesical pressure, and innervation were analyzed.

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Main Results:

  • Aged and hyperdiuretic rats showed increased threshold volume and bladder mass.
  • No difference in micturition contraction amplitude was observed.
  • Aged rats exhibited increased intravesical pressure and innervation changes, linked to altered sensory input.

Conclusions:

  • Aging alters urinary bladder function, increasing volume and mass.
  • Altered sensory feedback in aged rats is key to abnormal cystometric findings.
  • These changes differ from those seen in hyperdiuretic young rats.