Related Experiment Video
Updated: Jul 12, 2026

Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics
Published on: April 19, 2024
A recruitment manoeuvre performed after endotracheal suction does not increase dynamic compliance in ventilated
Brenda Morrow1, Merle Futter, Andrew Argent
1University of Cape Town, South Africa. brenda.morrow@uct.ac.za
Insights
Performing a recruitment maneuver after suctioning in pediatric patients did not improve ventilation or gas exchange. This study found no significant short-term benefits, suggesting current practices may not require this additional step.
Area of Science:
- Pediatric critical care medicine
- Respiratory physiology
- Mechanical ventilation
Background:
- Suctioning is a common procedure in mechanically ventilated children.
- Recruitment maneuvers are used to re-expand collapsed alveoli.
- The efficacy of recruitment maneuvers post-suctioning in pediatrics is not well-established.
Purpose of the Study:
- To investigate the immediate and short-term effects of a recruitment maneuver following endotracheal suctioning.
- To assess the impact on ventilation and gas exchange in mechanically ventilated pediatric patients.
Main Methods:
- A randomized controlled trial was conducted with concealed allocation and blinded assessors.
- Forty-eight pediatric patients were included, with 14 excluded due to air leaks.
- The intervention group received suctioning followed by a recruitment maneuver; the control group received only suctioning.
Main Results:
- No significant differences were observed in dynamic lung compliance, airway resistance, or oxygen saturation between groups.
- A transient decrease in mechanical tidal volume and increase in spontaneous tidal volume and respiratory rate were noted immediately post-maneuver.
- These transient changes resolved within 25 minutes, indicating no sustained benefit.
Conclusions:
- There is insufficient evidence to support the routine use of recruitment maneuvers after suctioning in infants and children.
- Further research may be needed to clarify the role of recruitment maneuvers in specific pediatric respiratory conditions.
Question:
Does a recruitment manoeuvre after suctioning have any immediate or short-term effect on ventilation and gas exchange in mechanically-ventilated paediatric patients?
Design:
Randomised controlled trial with concealed allocation, assessor blinding, and intention-to-treat analysis.
Participants:
Forty-eight paediatric patients with heterogeneous lung pathology. Fourteen patients were subsequently excluded from analysis due to large leaks around the endotracheal tube.
Intervention:
The experimental group received a single standardised suctioning procedure followed five minutes later by a standardised recruitment manoeuvre. The control group received only the single suctioning procedure.
Outcome Measures:
Measurements of ventilation (dynamic lung compliance, expiratory airway resistance, mechanical and spontaneous expired tidal volume, respiratory rate) and gas exchange (transcutaneous oxygen saturation) were recorded, on three occasions before and on two occasions after the recruitment manoeuvre, using a respiratory profile monitor.
Results:
There was no difference between the experimental and the control group in dynamic compliance, expired airway resistance, or oxygen saturation either immediately after the recruitment manoeuvre, or after 25 minutes. The experimental group decreased mechanical expired tidal volume by 0.3 ml/kg (95% CI 0.1 to 0.6), increased spontaneous expired tidal volume by 0.3 ml/kg (95% CI 0.0 to 0.6), and increased total respiratory rate by 3 bpm (95% CI 1 to 4) immediately after the recruitment manoeuvre compared with the control group, but these differences disappeared after 25 minutes.
Conclusion:
There is insufficient evidence to support performing recruitment manoeuvres after suctioning infants and children.
Related Concept Videos
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Cardiopulmonary Resuscitation II: ACLS Airway Management
Assessment of Ventilation I: Respiratory Rate
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Mechanical Ventilation III: Noninvasive Ventilation
Noninvasive Positive-Pressure Ventilation (NIPPV)
Factors Affecting Pulmonary Ventilation
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Endotracheal Intubation I: Procedure
The ET tube comprises various components, including a standard adaptor to attach a bag-valve-mask (BVM) or ventilator, a cuff, a pilot balloon, and radiopaque markings along its length to measure the insertion distance. The tube sizes...