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Methods of Sterilization II: Chemical Methods01:30

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In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
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As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
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When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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Determining Viral Disinfection Efficacy of Hot Water Laundering
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[The added value of additional testing during the sterilization process].

C Y A van Heusden, L Welling, D E Slot

    Nederlands Tijdschrift Voor Tandheelkunde
    |February 8, 2022
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    Summary
    This summary is machine-generated.

    Weekly steam penetration tests, like TST strips or Helix Tests, did not improve detection of sterilization failures in dental practices. Visual checks and error messages were more effective for ensuring instrument safety.

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    Area of Science:

    • Medical device reprocessing
    • Infection control
    • Sterilization monitoring

    Background:

    • Effective sterilization of dental instruments is crucial for preventing healthcare-associated infections.
    • Standard sterilization monitoring includes physical indicators, chemical indicators, and biological indicators.
    • Additional steam penetration tests (TST strip, Helix Test) are sometimes used to verify sterilization efficacy.

    Purpose of the Study:

    • To evaluate the effectiveness of additional steam penetration tests in detecting sterilization process failures in dental practices.
    • To compare the utility of TST strips and Helix Tests with standard monitoring methods.

    Main Methods:

    • Retrospective analysis of 13,923 sterilization runs from two dental practices (2012-2019).
    • Evaluation of sterilization outcomes with and without additional tests (TST strip, Helix Test).
    • Analysis of reasons for sterilization failures, including damp instruments and error messages.

    Main Results:

    • Complete color change observed in all 635 sterilization runs using TST strips.
    • Incomplete color change in 2 out of 250 sterilization runs using Helix Tests.
    • Damp instruments and error messages were the primary reasons for sterilization failures (35% each).
    • Additional tests did not detect irregularities missed by visual inspection and error message review.

    Conclusions:

    • Weekly use of TST strips or Helix Tests did not enhance the detection of sterilization process irregularities.
    • Visual inspection of instruments and monitoring of sterilization apparatus error messages are effective in identifying sterilization failures.
    • Routine monitoring through visual checks and error logs appears sufficient for ensuring sterilization effectiveness in these practices.