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Multidose vial contamination in anesthesia
Abstract:
The intent of this research was to address the following question: Will an alteration in the drug aspiration technique cause a significant difference in the incidence of multidose vial contamination? The control group consisted of multidose vials collected at the end of each day from staff anesthetists. The use of these vials reflected the practice technique of a single needle and syringe for each vial. The vial, as well as needle and syringe, were used on all cases managed for the day. The experimental group consisted of multidose vials collected at the end of each day from the four investigators. The vials and syringes were utilized in the same manner as the control group with the exception that a new needle was used each time a vial was reentered. Upon completion of the collection period, guaiac testing, using Hemoccult slides and developer, was performed on a 0.1 cc sample from each vial. A multidose vial was considered positive for blood contamination if traces of blue appeared on the Hemoccult slide in a 15-minute period. A chi-square statistic was applied to the cumulative data. The control group consisted of 492 multidose vials. Of the 492 multidose vials tested, 11 were guaiac positive, 2.24%. The experimental group consisted of 369 multidose vials. Of the 369 multidose vials, one tested guaiac positive, 0.27%. A chi-square test on the cumulative data demonstrated a significant (p less than .05) difference between the two groups. The research demonstrated that occult blood may be contained within the used multidose vials suggesting that contaminated drug may then be injected into another patient.(ABSTRACT TRUNCATED AT 250 WORDS)
Insights
Changing drug aspiration techniques significantly reduces multidose vial contamination. Using a new needle for each multidose vial entry prevents blood contamination, enhancing patient safety.
Area of Science:
- Medical Microbiology
- Anesthesiology
- Infection Control
Background:
- Multidose vials (MDVs) are frequently used in healthcare settings.
- Improper aseptic techniques during drug aspiration can lead to vial contamination.
- Previous studies have highlighted the risk of cross-contamination from MDVs.
Purpose of the Study:
- To investigate if altering the drug aspiration technique impacts multidose vial contamination rates.
- To assess the effectiveness of using a new needle for each vial entry in preventing contamination.
Main Methods:
- A comparative study design was employed with two groups: control (standard technique) and experimental (new needle per entry).
- Guaiac testing (Hemoccult slides) was performed on samples from collected MDVs to detect occult blood contamination.
- A chi-square statistic was used to analyze the cumulative data for significant differences between groups.
Main Results:
- The control group (standard technique) showed a contamination rate of 2.24% (11 out of 492 vials).
- The experimental group (new needle per entry) demonstrated a significantly lower contamination rate of 0.27% (1 out of 369 vials).
- The chi-square test confirmed a statistically significant difference (p < .05) in contamination rates between the two techniques.
Conclusions:
- Altering the drug aspiration technique by using a new needle for each multidose vial entry significantly reduces the incidence of blood contamination.
- Occult blood contamination in used MDVs poses a risk of transmitting infectious agents between patients.
- Implementing standardized protocols for needle use with MDVs is crucial for preventing healthcare-associated infections.