• K Spence, D Gillies, and L Waterworth.
• Department of Neonatology, The Children's Hospital at Westmead, Locked Bag 4001, Westmead, NSW, Australia.
• Cochrane Db Syst Rev. 2003 Jan 1 (3): CD003309.

BackgroundMechanical ventilation is commonly used in Neonatal Intensive Care Units to assist breathing in a variety of conditions. Mechanical ventilation is achieved through the placement of an endotracheal tube (ETT) which is left in-situ. The ETT is suctioned to prevent a build-up of secretions and therefore blockage of the airway. Methods of suctioning the endotracheal tube vary according to institutional practice and the individual clinician performing the task. The depth of suctioning is one of these variables. The catheter may be passed to the tip of the ETT or beyond the tip into the trachea or bronchi to facilitate removal of secretions. However, trauma to the lower airways may result from the suction catheter being passed into the airway beyond the tip of the endotracheal tube.ObjectivesTo compare the effectiveness and complications of deep (catheter passed beyond the tip of the ETT) versus shallow (catheter passed to length of ETT only) suctioning of the endotracheal tube in ventilated infants.Search StrategyUsing text words and subject headings relevant to endotracheal suctioning, searches were made of the Oxford Database of Perinatal Trials, Cochrane Register of Controlled Trials (The Cochrane Library, Issue 3, 2002), MEDLINE (from January 1966 to December 2002, all languages), CINAHL (from 1982 to 2002). In addition, a call was placed on the list servers, NICU-NET and Neonatal-Talk for unpublished trials, conference presentations and current trials.Selection CriteriaControlled trials using random or quasi-random allocation of neonates receiving ventilatory support via an endotracheal tube to either deep or shallow endotracheal suctioning.Data Collection And AnalysisNo studies were found meeting the criteria for inclusion in this reviewMain ResultsNo studies were found meeting the criteria for inclusion in this reviewReviewer's ConclusionsThere is no evidence from randomised controlled trials concerning the benefits or risks of deep versus shallow suctioning of endo-tracheal tubes in ventilated neonates and infants. Further high quality research would be required to conclusively establish whether there are any benefits to deep or shallow suctioning. However, as it may be considered unethical to conduct a trial of deep suctioning given anecdotal evidence regarding possible damage to the airway, it is proposed that a randomised controlled trial comparing deep with shallow suctioning may be considered in a NICU where the standard practice includes a deep suctioning technique.

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