Home  About us  Contact
 

Tube Cuffs (tube + cuff)

Distribution by Scientific Domains
Medical Sciences100%

Kinds of Tube Cuffs

  • tracheal tube cuff
    		•

    Selected Abstracts

    Simulation as a tool to improve the safety of pre-hospital anaesthesia , a pilot study,

    ANAESTHESIA, Issue 9 2009
    A. J. Batchelder
    Summary We conducted a pilot study of the effects of simulation as a tool for teaching doctor-paramedic teams to deliver pre-hospital anaesthesia safely. Participants undertook a course including 43 full immersion, high-fidelity simulations. Twenty videos taken from day 4 and days 9/10 of the course were reviewed by a panel of experienced pre-hospital practitioners. Participants' performance at the beginning and the end of the course was compared. The total time from arrival to inflation of the tracheal tube cuff was longer on days 9/10 than on day 4 (mean (SD) 14 min 52 s (2 min 6 s) vs 11 min 28 s (1 min 54 s), respectively; p = 0.005), while the number of safety critical events per simulation were fewer (median (IQR [range]) 1.0 (0,1.8 [0,2]) vs 3.5 (1.5,4.8 [0,8], respectively; p = 0.011). Crew resource management behaviours also improved in later simulations. On a personal training needs analysis, participants reported increased confidence after the course. [source]

    Pressures within air-filled tracheal cuffs at altitude , an in vivo study

    ANAESTHESIA, Issue 3 2004
    J. Henning
    Summary Aeromedical transport of mechanically ventilated critically ill patients is now a frequent occurrence. However, the performance of the air filled tracheal tube cuff at altitude has not been studied in vivo. We measured the tracheal cuff pressures at ground level and at 3000 ft, in 10 intubated patients. With air providing the seal in the cuff the mean rise in cuff pressure was 23 cmH2O, which took the pressures above the critical perfusion pressure of the tracheal mucosa. This could lead to tracheal injury. [source]

    Cuff compliance of pediatric and adult cuffed tracheal tubes: an experimental study

    PEDIATRIC ANESTHESIA, Issue 8 2004
    J.-M. Devys MD
    Summary Background :,Tracheal mucosal damage related to tracheal intubation has been widely described in pediatric and adult patients. High volume,low pressure cuffs (HVLPC) are being advertised as safe to avoid this particularly unpleasant complication. Compliances of these supposed pediatric and adult HVLPC are not mentioned by manufacturers and still remain unknown. Methods :,The compliance of HVLPC was measured in vitro and defined as the straight portion of the pressure,volume curve. Cuff pressure was measured after incremental 0.1 ml filling volumes of air for sizes 3.0,8.0 of internal diameter of RüschTM and MallinckrodtTM tracheal tubes. Compliances were assessed in air and in a rigid tube. The filling volume to achieve a 25-mmHg intracuff pressure was also measured. Results :,In air, each 0.1 ml step almost linearly increased cuff pressure by 1 mmHg (size 8.0) to 9 mmHg (size 3). In air, the volume needed to maintain a cuff pressure < 25 mmHg was small for sizes 3,5.5 (0.35,2 ml). The 25 mmHg inflated cuff volume and compliance were decreased within a rigid tube, especially for adult sizes. In a rigid tube simulating a trachea, the compliances of almost every RüschTM tracheal tube were statistically higher than those of the MallinckrodtTM. Conclusion :,We conclude that the tested tracheal tube cuffs have low compliance and cannot be defined as high volume,low pressure. [source]

    The effect of pilot balloon design on estimation of safe tracheal tube cuff pressure

    ANAESTHESIA, Issue 8 2010
    K. M. Janossy
    Summary We studied the effect of pilot balloon design on the ability of experienced anaesthetists to assess and inflate tracheal tube cuffs to safe pressures. A model trachea was designed, incorporating a degree of compliance and an air leak, to evaluate six different pilot balloons grafted onto identical tracheal tubes. Pilot balloons were inflated to one of four pressures and anaesthetists were asked to estimate whether the pressure was acceptable, too low or too high. Anaesthetists were then asked to inflate the cuff of each tube. Overall, 103 (42.9%) of anaesthetists' assessments of tracheal tube cuff pressures were correct (33% correct would be expected by chance, p = 0.002). Pressures generated by anaesthetists inflating tracheal tube cuffs were very variable. Median (IQR [range]) pressures for each pilot balloon ranged from 29 (17,43 [9,56]) cmH2O to 74 (49,114 [4,140]) cmH2O (p < 0.001). The design of the pilot balloon significantly affects anaesthetists' ability to inflate tracheal tube cuffs to safe pressures. [source]

    Leakage of fluid around high-volume, low-pressure cuffs

    ANAESTHESIA, Issue 1 2001
    apparatus
    We studied the ability of high-volume, low-pressure tracheal tube cuffs (Portex Soft Seal®, Portex Profile®, Mallinckrodt Lo-Contour® and Mallinckrodt Hi-Lo® tubes) to prevent leakage of fluid into the airway, in a model trachea and lung. Five tubes (7.0 and 8.0 mm internal diameter) of each type were used. Each tube was inserted into the model trachea and the cuff inflated until the intracuff pressure reached either 20, 30 or 40 cmH2O. The model lung was ventilated with a tidal volume of 700 ml and respiratory rate of 14 breath.min,1 at a compliance of 20 cmH2O. Ten millilitres of 0.01% methylene blue solution were infused over the cuff and the volume of fluid leaking past the cuff over 5 min was measured. The leak volume for the Soft Seal tube was less than that for the Profile or Lo-Contour tubes at all intracuff pressures (all p <,0.05). Compared with the Hi-Lo tube, the volume leaking past the cuff for the Soft Seal tube was greater at an intracuff pressure of 20 cmH2O (p <,0.05), whereas there was no significant difference between these two tubes at an intracuff pressure of 30 or 40 cmH2O. We conclude that the cuff of the Portex Soft Seal tube prevented leakage of fluid significantly more than that of the Portex Profile or Mallinckrodt Lo-Contour tubes, and to a similar degree to that of the Mallinckrodt Hi-Lo tube. [source]