Extended use of disposable pressure transducers. A bacteriologic evaluation

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.