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An Automatic Cuff Pressure Controller (SmartCuff) Detected Cuff Damage in a Tracheal Tube: A Case Report
Yuzo ImaiDDS, PhD,
Naotaka KishimotoDDS, PhD,
Shigenobu KurataDDS, PhD,
Yutaka TanakaDDS, PhD,
Tatsuru TsurumakiDDS, PhD,
Hiroko KanemaruDDS, PhD,
Toru YamamotoDDS, PhD, and
Kenji SeoDDS, PhD
Article Category: Other
Volume/Issue: Volume 71: Issue 3
Online Publication Date: Sep 09, 2024
DOI: 10.2344/623662
Page Range: 145 – 146

We herein report a case in which an automatic cuff pressure controller (SmartCuff, Murata Manufacturing Co, Ltd) enabled detection of endotracheal tube (ETT) cuff damage. A 23-year-old woman underwent nasally intubated general anesthesia, and several minutes after securing the airway, the device alarm suddenly sounded in response to a drop in cuff pressure. This alerted us to the damaged cuff despite the noted absence of decreased ventilatory volumes or abnormal capnographic waveforms. The damaged ETT was successfully exchanged, and the case proceeded without

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Figure 1.; SmartCuff Connected to the Valve of the ETT Pilot Balloon. (A) The SmartCuff device automatically controls the internal cuff pressure once connected to the ETT pilot balloon valve. An extension tube is used to attach the SmartCuff device to the pilot balloon. (B) Enlarged view of the SmartCuff device showing the set (upper right) and measured (center) cuff pressure values. (C) A decrease in cuff pressure is indicated by the red alarm light on the front of the instrument screen and the downward-pointing arrow. The black dot indicates that the equipment is operating correctly. The numbers “28” and “0” on the screen show the set values and the currently measured values, respectively. ETT, endotracheal tube.
Yuzo Imai,
Naotaka Kishimoto,
Shigenobu Kurata,
Yutaka Tanaka,
Tatsuru Tsurumaki,
Hiroko Kanemaru,
Toru Yamamoto, and
Kenji Seo
Figure 1.
Figure 1.

SmartCuff Connected to the Valve of the ETT Pilot Balloon.

(A) The SmartCuff device automatically controls the internal cuff pressure once connected to the ETT pilot balloon valve. An extension tube is used to attach the SmartCuff device to the pilot balloon.

(B) Enlarged view of the SmartCuff device showing the set (upper right) and measured (center) cuff pressure values.

(C) A decrease in cuff pressure is indicated by the red alarm light on the front of the instrument screen and the downward-pointing arrow. The black dot indicates that the equipment is operating correctly. The numbers “28” and “0” on the screen show the set values and the currently measured values, respectively. ETT, endotracheal tube.

Figure 2.; The Damaged ETT Cuff. Air bubbles (black arrow) leaking from the small hole on the damaged ETT cuff were observed when air was injected into the cuff via the pilot balloon valve. ETT, endotracheal tube.
Yuzo Imai,
Naotaka Kishimoto,
Shigenobu Kurata,
Yutaka Tanaka,
Tatsuru Tsurumaki,
Hiroko Kanemaru,
Toru Yamamoto, and
Kenji Seo
Figure 2.
Figure 2.

The Damaged ETT Cuff.

Air bubbles (black arrow) leaking from the small hole on the damaged ETT cuff were observed when air was injected into the cuff via the pilot balloon valve. ETT, endotracheal tube.