Extended use of disposable pressure transducers. A bacteriologic evaluation
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Abstract:
In a prospective randomized study, contamination rates of disposable pressure transducers changed every two days (n = 81) were compared with those changed at four (n = 26) or eight days (n = 50); the mean daily incidence of contamination was 3% for each group. After four days of use, the cumulative prevalences of contamination were similar. However, after eight days, the cumulative prevalence was significantly higher in transducers used without change (6.9%) than in those changed every two days (2.9%). Gram-negative bacilli were present in 63% of contaminated transducers; over half were from the patients' own flora. The only definite transducer-related bacteremia occurred on a day of initial contamination and should have been unaffected by the interval of change. Routine use of disposable transducers can be safely extended to four days, even in a busy intensive care unit.
Insights
Disposable pressure transducer contamination rates were similar for up to four days. Extending use to eight days significantly increased contamination, primarily with Gram-negative bacilli from patient flora. Routine transducer use can be safely extended to four days.
Area of Science:
- Infection Control
- Medical Device Safety
- Microbiology
Background:
- Disposable pressure transducers are critical for monitoring in intensive care units (ICUs).
- Current guidelines often recommend frequent replacement to minimize contamination risks.
- Optimizing replacement intervals balances infection prevention with resource utilization.
Purpose of the Study:
- To compare contamination rates of disposable pressure transducers based on different change intervals.
- To evaluate the safety and efficacy of extending the use of these devices.
- To identify the microbial profile of contaminated transducers.
Main Methods:
- A prospective randomized study design was employed.
- Three groups of disposable pressure transducers were evaluated: changed every two, four, or eight days.
- Contamination incidence and cumulative prevalence were monitored, with microbial identification performed on positive samples.
Main Results:
- The mean daily contamination incidence was consistently 3% across all groups.
- Cumulative contamination after four days was similar across all intervals.
- After eight days, transducers changed every two days had significantly lower contamination (2.9%) compared to those not changed (6.9%).
- Gram-negative bacilli, often from patient flora, predominated in contaminated devices.
Conclusions:
- Routine use of disposable pressure transducers can be safely extended to four days.
- Extending use beyond four days, particularly to eight days, significantly increases contamination risk.
- Frequent transducer changes are crucial for maintaining low contamination rates in high-acuity settings.
