advantage of closed suctioning vs open suctioning in icu setting, cite

advantage of closed suctioning vs open suctioning in icu setting, cite articles

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"closed suction" AND "open suction"

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closed versus open endotracheal suction system ICU systematic review guideline

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PMID: 39242302

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PMID: 17943823

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PMID: 8143475

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PMID: 15333426

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https://pubmed.ncbi.nlm.nih.gov/39242302/

In mechanically ventilated ICU patients, closed tracheal suctioning (CTSS) has practical advantages over open tracheal suctioning (OTSS) because suctioning is done without disconnecting the ventilator circuit.

Advantage of closed suctioning	Why it matters in ICU practice
Maintains PEEP and ventilatory support	The ventilator remains connected, reducing loss of positive end-expiratory pressure and alveolar derecruitment. This is especially useful in severe hypoxemic respiratory failure, ARDS, high-PEEP ventilation, or prone patients.
Better short-term oxygenation and physiologic stability	Avoiding circuit disconnection reduces transient desaturation. A small randomized ICU trial found less fall in arterial and mixed venous oxygen saturation, lower post-procedure heart rate, and fewer dysrhythmias with closed suctioning.
Less environmental aerosol and secretion dispersion	A closed circuit limits release of respiratory secretions into the room, improving occupational infection-control conditions. This was a particular consideration during COVID-19.
Potential reduction in VAP	A 2025 systematic review and meta-analysis of 13 studies involving 2,822 adults found lower VAP odds with CTSS: OR 0.77, 95% CI 0.61-0.98.
May reduce cross-contamination	One small RCT found no bronchial-gastric cross-contamination in the closed-system group, compared with five events in the open-system group.
Quicker and easier when frequent suction is needed	CTSS can be used without assembling sterile equipment or repeatedly breaking the circuit. It may be practical for unstable patients and for minimizing staff exposure.

Important qualifications

Closed suction should not be claimed to improve mortality, ventilation duration, or ICU length of stay. The 2025 meta-analysis found no significant difference in these outcomes.
Evidence on VAP is mixed over time. An earlier Cochrane review of 16 trials found no statistically significant difference in VAP or mortality, though many included studies had methodological limitations. The newer meta-analysis suggests a modest VAP benefit.
CTSS may have higher device cost and must be correctly managed and changed according to local infection-control policy. Earlier evidence also found higher airway bacterial colonization with closed systems, without a demonstrated mortality effect.
Either method should be performed only when clinically indicated, with appropriate pre-oxygenation and aseptic technique.

Bottom line

Choose closed suctioning when preservation of PEEP/oxygenation, avoidance of circuit disconnection, frequent suctioning, or reduction of staff exposure is important. It is particularly attractive in patients with ARDS or high oxygen/PEEP requirements. Its strongest established advantage is physiological stability during suctioning. A possible VAP reduction is supported by newer pooled evidence but remains less definitive than the physiologic benefit.

Key articles

Liang Z, et al. (2025). Comparative analysis of open and closed tracheal suction systems on mechanical ventilation efficiency in adults: A systematic review and meta-analysis. Australian Critical Care. PMID: 39242302. Meta-analysis: CTSS reduced VAP, OR 0.77 (95% CI 0.61-0.98), with no clear difference in mortality, ICU stay, or ventilation duration.
Subirana M, Solà I, Benito S. (2007). Closed tracheal suction systems versus open tracheal suction systems for mechanically ventilated adult patients. Cochrane Database of Systematic Reviews. PMID: 17943823. Earlier review: no clear difference in VAP or mortality.
Johnson KL, et al. (1994). Closed versus open endotracheal suctioning: costs and physiologic consequences. Critical Care Medicine. PMID: 8143475. Randomized ICU study: less desaturation, fewer dysrhythmias, and less cardiovascular disturbance with CTSS.
Rabitsch W, et al. (2004). Closed suctioning system reduces cross-contamination between bronchial system and gastric juices. Anesthesia & Analgesia. PMID: 15333426. Small RCT reporting less cross-contamination, fewer hypoxic episodes, and fewer VAP events with CTSS.

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Here are the key articles comparing closed versus open endotracheal suctioning in mechanically ventilated ICU patients:

[Systematic review and meta-analysis . 2025] Liang Z, Liao Q, Xu J, et al. Comparative analysis of open and closed tracheal suction systems on mechanical ventilation efficiency in adults: A systematic review and meta-analysis. Australian Critical Care. 2025. doi: 10.1016/j.aucc.2024.08.003.
PubMed abstract
Included 13 studies and 2,822 patients. Closed suction was associated with lower VAP incidence: OR 0.77, 95% CI 0.61-0.98. No significant difference in mortality, ventilator duration, or ICU length of stay.
[Cochrane systematic review . 2007] Subirana M, Solà I, Benito S. Closed tracheal suction systems versus open tracheal suction systems for mechanically ventilated adult patients. Cochrane Database of Systematic Reviews. 2007;4:CD004581. doi: 10.1002/14651858.CD004581.pub2.
PubMed article | Free full text
Analysed 16 trials with 1,684 patients. It found no statistically clear difference in VAP, mortality, or ICU stay, although the included trials were often methodologically weak.
[Randomized controlled trial . 1994] Johnson KL, Kearney PA, Johnson SB, et al. Closed versus open endotracheal suctioning: costs and physiologic consequences. Critical Care Medicine. 1994;22(4):596-604. doi: 10.1097/00003246-199404000-00023.
PubMed abstract
Closed suctioning led to less oxygen desaturation, fewer dysrhythmias, and less hemodynamic disturbance than open suctioning.
[Randomized controlled trial . 2004] Rabitsch W, Köstler WJ, Fiebiger W, et al. Closed suctioning system reduces cross-contamination between bronchial system and gastric juices. Anesthesia & Analgesia. 2004;99(3):886-892. doi: 10.1213/01.ANE.0000143353.85428.39.
PubMed abstract
In a small medical ICU trial, closed suction was associated with less bronchial-gastric cross-contamination, fewer hypoxic episodes, and fewer VAP events.
[Randomized controlled trial . 2004] Topeli A, Harmanci A, Cetinkaya Y, Akdeniz S, Unal S. Comparison of the effect of closed versus open endotracheal suction systems on the development of ventilator-associated pneumonia. Journal of Hospital Infection. 2004;58(1):14-19. doi: 10.1016/j.jhin.2004.05.005.
PubMed article
This individual trial did not find a significant VAP benefit from closed suctioning, illustrating why the infection-outcome evidence remains mixed.

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