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Insulation failure in laparoscopic instruments.

Paul N Montero1, Thomas N Robinson, John S Weaver

  • 1Department of Surgery, University of Colorado Denver School of Medicine, Aurora, CO 80045, USA.

Surgical Endoscopy
|July 3, 2009
PubMed
Summary
This summary is machine-generated.

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One in five reusable laparoscopic instruments shows insulation failure, a risk not reduced by routine checks. Disposable instruments have significantly lower rates of insulation failure, with most defects occurring in the distal third.

Area of Science:

  • Minimally Invasive Surgery
  • Surgical Technology
  • Patient Safety

Background:

  • Electrosurgery is integral to laparoscopic procedures.
  • Historically, capacitive coupling was blamed for injuries; now, insulation failure is the primary concern.
  • Modern laparoscopy has minimized capacitive coupling, highlighting insulation integrity as critical.

Purpose of the Study:

  • To determine the incidence of insulation failures in laparoscopic instruments.
  • To compare insulation failure rates between reusable and disposable instruments.
  • To identify the common locations of insulation failures.

Main Methods:

  • A high-voltage porosity detector assessed 226 laparoscopic instruments (165 reusable, 61 disposable) across four hospitals.
  • Insulation failure was defined as 2.5 kV crossing the insulation, creating a closed circuit.

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Last Updated: Jun 22, 2026

Laparoscopic Pancreatoduodenectomy for Pancreatic Cancer Using In-Situ No-Touch Isolation Technique
08:12

Laparoscopic Pancreatoduodenectomy for Pancreatic Cancer Using In-Situ No-Touch Isolation Technique

Published on: February 2, 2022

  • Statistical analysis used Fisher's exact or chi-squared tests (p < 0.05).

    • Main Results:

    • Insulation failure was significantly higher in reusable instruments (19%) compared to disposable ones (3%; p < 0.01).
    • 71% of reusable instrument sets contained at least one faulty instrument.
    • Insulation failures were most frequently found in the distal third of instruments (54%).

    Conclusions:

    • Approximately 20% of reusable laparoscopic instruments exhibit insulation failure.
    • Routine institutional checks do not significantly alter the incidence of insulation failure in reusable instruments.
    • Disposable instruments present a lower risk of insulation failure, with the distal aspect being the most common failure site.