title: [Pressure-volume relationship for paediatric cuffed tracheal tube].
abstract: OBJECTIVE
  Define the pressure-volume relationship of the cuff of paediatric cuffed tracheal tubes.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  The cuff pressure was measured after incremental 0.1 ml filling volumes for 6 sizes (3.0 to 5.5 mm of internal diameter) of paediatric high volume-low pressure cuffed-tracheal tubes. The pressure-volume relationship of the cuff was assessed with and without resistance to the filling. Results were expressed with medium +/- SD.
  
  
  RESULTS
  Each increment increased the cuff pressure, without resistance, of 7.3 +/- 1.7 mmHg for sizes 3.0, 3.5 and 4.0, 4.8 +/- 1.6 mmHg for size 4.5, and 2.3 +/- 0.9 mmHg for sizes 5 and 5.5. The resistance decreased the filling volume of the cuff for each size of tracheal tubes.
  
  
  CONCLUSIONS
  The margin of safety provided by cuff of smallest cuffed tracheal tubes is too small. Then, the smallest sizes (3.0 to 4.5) should not be called low pressure-high volume cuff.
authors.affiliation: Département d'anesthésiologie-réanimation-urgences, fondation Adolphe-de-Rothschild, 25-29, rue Manin, 75940 cedex 19, Paris, France. jmdevys@fo-rothschild.fr <jmdevys@fo-rothschild.fr>
authors.forename: J M
authors.initials: JM
authors.lastname: Devys
authors.forename: V
authors.initials: V
authors.lastname: Guellec
authors.forename: J M
authors.initials: JM
authors.lastname: Mourès
authors.forename: B
authors.initials: B
authors.lastname: Plaud
mesh_terms: D000399:Air Pressure; D002648:Child; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D014132:Trachea / Q000033:anatomy & histology