Cuff Pressure is Decrease by Manually Checking Cuff Pressure

DOI 1 Citations 3 References
  • TSUYUKI Nao
    杏林大学医学部付属病院（前浜松医科大学医学部附属病院）

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Other Title
  • 気管チューブのカフ圧は調整手技により低下する
  • ―実験研究による検討―

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Description

Backgound - It is important to maintain the pressure in the cuff of an endotracheal tube at a proper level. In order to measure this pressure, a manometer must be connected to the cuff. It has been questioned whether the cuff pressure actually decreases each time a measurement is made. The purpose of this study was to evaluate whether the pressure decreases while measuring the cuff pressure and to evaluate a proposed technique to minimize this decrease in cuff pressure.<br>Method - I made a system for checking cuff pressure continuously. This system has a manometer between the cuff and pilot valve. Using this system, cuff pressure was measured in the standard manner by connecting the bulb manometer, measuring the pressure and disconnecting the bulb manometer. During the procedure, the cuff pressure was measured continuously. An alternative technique was evaluated. The three-way stopcock near the pilot balloon was closed and a syringe was used to pressure the manometer to 30 cmH2O. Then the three-way stopcock was opened and the cuff pressure was measured. <br>Results - When the cuff pressure was measured in the standard manner by connecting the bulb manometer, measuring the pressure, then disconnecting the bulb manometer, the cuff pressure decreased each time the manometer was connected and disconnected. The pressure decreased more when the manometer was connected. When the cuff pressure was measured with the alternative technique using a syringe to pressure the manometer to 30 cmH2O prior to checking the pressure, the pressure decreased only slightly.<br>Conclusion - Maintaining proper cuff pressure is important to prevent aspiration of oral secretions and to prevent ventilator associated pneumonia. Using this alternative technique was useful in this bench test to maintain the pressure in the cuff. Further studies are necessary to determine the value of this technique on patients.

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