Evaluation of a closed-tracheal suction system

Area of Science:

• Critical Care Medicine
• Respiratory Therapy

Background:

• Mechanical ventilation requires airway suctioning to clear secretions.
• Conventional suctioning involves disconnecting the patient from the ventilator, risking oxygenation and contamination.
• A novel closed-suction system (Trach Care) allows continuous connection to the ventilator during suctioning.

Purpose of the Study:

• To evaluate the benefits and drawbacks of the Trach Care closed-suction system compared to conventional methods.
• To assess the impact of the closed-suction system on oxygenation and ventilation parameters in patients on mechanical ventilation.
• To determine the clinical and economic viability of the Trach Care system.

Main Methods:

• A comparative study involving 20 mechanically ventilated patients.
• Patients were divided into two groups based on Positive End-Expiratory Pressure (PEEP) requirements (≤10 cm H2O and >10 cm H2O).
• Measurements included PaCO2, arterial oxygen saturation, and alveolar-arterial oxygen tension difference before and after suctioning with both conventional and closed-suction techniques.

Main Results:

• Oxygenation deterioration was observed only with the conventional open suctioning technique in patients requiring PEEP >10 cm H2O.
• These changes were statistically significant but not clinically significant.
• The Trach Care system is significantly more expensive (25 times) than conventional catheters.

Conclusions:

• The closed-suction system does not offer universal clinical advantages over conventional suctioning.
• Potential benefits include preventing the dissemination of contaminated secretions.
• The high cost of the Trach Care system makes its routine economic justification difficult; use may be considered case-by-case.