Skip to content


  • Poster presentation
  • Open Access

How is sedation provided for percutaneous dilatational tracheostomy in English ICUs?

  • 1 and
  • 1
Critical Care201115 (Suppl 1) :P349

  • Published:


  • Bispectral Index
  • Percutaneous Dilatational Tracheostomy
  • Rigid Bronchoscopy
  • Simple Infusion
  • Intermittent Bolus


Percutaneous dilatational tracheostomy (PDT) is commonly performed at the bedside in the ICU. Patients in the ICU often have multiple organ dysfunction, causing alterations in drug effects and metabolism. Alterations in sedative drug handling may make them vulnerable to awareness during PDT. Up to 40% of patients in the ICU report some awareness whilst receiving neuromuscular receptor blocking drugs [1] - these drugs are usually employed when performing PDT. Depth of anaesthesia monitoring may prevent awareness and has been used during PDT [2]. Various depths of anaesthesia monitors are available, including the bispectral index monitor (BIS), the Narcotrend Index and the State and Response Entropy, derived from the EEG. We report the results of a telephone survey on the sedation given for PDT in English ICUs.


We contacted 240 adult ICUs in England by telephone. Two hundred and twenty-four units (93%) participated.


Two hundred and fourteen units (95%) perform PDT as their first-choice technique. Units that do not practice PDT (n = 10, 5%) perform open surgical tracheostomy. Most ICUs use simple infusions of propofol via standard infusion pumps during PDT (n = 202, 94%), and give additional boluses of propofol if necessary. In seven units (3.3%) anaesthesia is provided using intermittent boluses of propofol, without a background infusion. This may be of concern given that one study reported awareness during rigid bronchoscopies [3] and all the patients who reported awareness were anaesthetized using intermittent boluses of propofol. Nine units (4.2%) reported using a BIS during PDT. Three ICUs have used a BIS on a trial basis, but have discontinued. One reason given for discontinuing using a BIS was that it 'made no difference to the amount of sedation' during PDT.


Depth of anaesthesia monitoring is not widely used in English ICUs during PDT. It is unclear whether a BIS is effective for monitoring depth of anaesthesia during PDT, and further studies are needed to clarify this.

Authors’ Affiliations

Royal Liverpool and Broadgreen University Hospital, Liverpool, UK


  1. Wagner , et al.: Patient recall of therapeutic paralysis in a surgical critical care unit. Pharmacotherapy 1998, 18: 358-363.PubMedGoogle Scholar
  2. Phukan , et al.: Percutaneous tracheostomy: a guide wire complication. Br J Anaesthesia 2004, 92: 891-893. 10.1093/bja/aeh141View ArticleGoogle Scholar
  3. Bould , et al.: Bispectral index values during elective rigid bronchoscopy: a prospective observational pilot study. Anaesthesia 2007, 62: 438-445. 10.1111/j.1365-2044.2007.04986.xView ArticlePubMedGoogle Scholar


© Hampshire and McCrossan 2011

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.