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Related Experiment Videos

Prostate biopsy outcome using 29 mm cutting length.

K G Fink1, G Hutarew, A Pytel

  • 1Department of Urology and Andrology, St. Johannsspital, Paracelsus Medical Private University, Salzburg, Austria. k.g.fink@salk.at

Urologia Internationalis
|October 11, 2005
PubMed
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Using a longer needle in prostate biopsies significantly improves cancer detection rates. An extended 29 mm cutting length needle demonstrated an 18% increase in detecting prostate cancer compared to the standard 19 mm needle.

Area of Science:

  • Urology
  • Oncology
  • Medical Device Technology

Background:

  • Prostate cancer diagnosis relies heavily on accurate tissue sampling via biopsy.
  • Standard needle lengths may limit the detection of cancerous tissue, particularly in certain prostate zones.

Purpose of the Study:

  • To compare the efficacy of standard versus extended cutting needle lengths in ex vivo prostate biopsy.
  • To evaluate the impact of needle cutting length on prostate cancer detection rates.

Main Methods:

  • Ex vivo analysis of 74 prostates using simulated transrectal ultrasound-guided biopsies.
  • Comparison of two needle types: 18-gauge with 19 mm cutting length and 18-gauge with 29 mm cutting length.

Main Results:

Related Experiment Videos

  • The 29 mm cutting length needle detected 78% of carcinomas, compared to 66% with the 19 mm needle, an 18% improvement.
  • Longer cores improved cancer detection, though no transition-zone-only cancers were identified in this cohort.

    • Conclusions:

    • Extended cutting length (29 mm) significantly enhances prostate cancer detection in an ex vivo setting.
    • Development of longer tru cut needles is supported for future clinical investigation, pending suitability assessment of end-cutting needles.