A tutorial by
Jo Mourisse MD PhD*
Guido Van Der Reijden**
Alberto Grassetto MD***
Tritube may represent an ideal approach to tracheal resection for its small 4.4mm outer diameter. It enables gentle awake intubation in case of difficult airways and sweet awakening. Moreover, no field intubation is needed. Finally, fiberoptic evaluation is made easier.
* Radboud University Medical Centre, Nijmegen (NL)
** Ventinova Medical, Eindhoven (NL)
*** Vittorio Veneto Hospital (IT)
It could be useful to perform a pre-operative evaluation with a flexible bronchoscope of the trachea’s anatomy.
Subsequently, it will be chosen if the patient can be intubated after induction of anesthesia or if it’s safer to proceed to awake intubation.
Consider the use of HFNC (High-flow Nasal Cannula) during pre-oxygenation of a patient with predicted difficult airways, to increase the apnoea time.
Difficult airway (Awake intubation)
Awake nasal
intubation: Tritube in combination with a guidewire
When Tritube is at the desired position, perform the following steps:
NOTE: If mask ventilation fails/insufficient and/or support is desired during induction, consider to start FCV with deflated cuff. This result in leakage, causing that PEAK level might not be reached. Evone remains however insufflating under continuous pressure measurement control AND additional intermittent pressure control.
Intubation (after induction)
NOTE: The patient MUST have a complete neuromuscular block (NMB) before initiating ventilation with Evone in FCV mode. The monitoring of neuromuscular block with TOF should be considered before intubation;
NOTE: Performing flexible bronchoscopy can be challenging during surgery, because of the presence of the surgical drapes/towels. Therefore after intubation Tritube, it can be considered to place a laryngeal mask which can be used as working channel to facilitate the flexible bronchoscope. The laryngeal mask will be placed alongside of Tritube
When a laryngeal mask does not fit, a mayo tube can be considered for this purpose.
TIPS: Very high tracheal resection (cricoid involved in resection)
When the surgical site is high (close to the vocal cords), the surgical view can be worsened due to collapsing structures. Normally this is prevented by the size of a conventional endotracheal tube, however Tritube is too thin for this. To prevent this, an additional tube could be placed (for example tube size 9) to act as a stent in parallel to Tritube. This can then also be used as working channel for the flexible bronchoscope (instead of laryngeal mask/mayo as described above).
Check location resection
Perform fibroscopy to confirm the exact location of the area that must be resected. From the outside it can be challenging for the surgeons to determine the exact location. It can therefore be considered to open the trachea under fiberoptic guidance.
Check
tracheal sutures
Before
closing the skin, the sutures of the trachea must be checked with a flexible
bronchoscope for leakage. This is usually done by building up pressure and
check for bubbles.
- Deflate
cuff Tritube. Built up pressure (e.g. by means of inspiration hold) and close
hereby mouth and nose
- When
laryngeal mask is used: create pressure through laryngeal mask, whereby cuff Tritube
remains inflated.
Length cuff + tip Tritube = 6,5 cm
Mean length left main bronchus = 4,5 cm
The tip of Tritube will end in the junction left upper lobe / left lower lobe when Tritube is placed in the left main bronchus: so that ventilation is then not possible. Consider the following:
NOTE: Due to the angle to
the left main bronchus it can happen that the tip of Titrube ends in the
bronchial wall (also when cuff is inflated). Check with the fiberscope if the
murphy eye of Tritube is at ‘the free /open side’. Otherwise turn Tritube.
DISCLAIMER: The alteration of the cuff size is not approved by the Tritube manifacturer, so the decision to modify in such way the tube is under user's responsability
Awakening / extubation
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