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Double lumen tube: Size and insertion depth.

Abdelazeem A Eldawlatly1

  • 1Department of Anesthesia, College of Medicine, King Saud University Medical City, Riyadh, KSA.

Saudi Journal of Anaesthesia
|November 12, 2021
PubMed
Summary

Selecting the right size and insertion depth for left-sided double lumen tubes (LDLTs) is crucial for thoracic surgery. This study suggests smaller LDLT sizes and a height-based formula for insertion depth, alongside fiberoptic confirmation, to minimize airway trauma.

Keywords:
Double lumen tubesurgerythoracic anesthesia

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Area of Science:

  • Anesthesiology
  • Thoracic Surgery
  • Respiratory Medicine

Background:

  • Double lumen tubes (DLTs) are essential for one lung ventilation (OLV) during thoracic procedures.
  • Left-sided DLTs (LDLTs) are predominantly used, but optimal size selection and insertion depth remain challenging.
  • Existing literature lacks clear guidelines for LDLT size and insertion, potentially leading to airway complications.

Purpose of the Study:

  • To address the unresolved issues of ideal size selection and insertion depth for left-sided double lumen tubes (LDLTs).
  • To evaluate the efficacy of using smaller LDLT sizes and a novel height-based formula for insertion depth prediction.
  • To minimize airway trauma associated with LDLT use in thoracic surgery.

Main Methods:

  • Clinical practice involved using smaller LDLT sizes: 35 French (F) for females and 37 F for males.
  • A height-based formula was developed and applied to predict the optimal insertion depth for LDLTs.
  • Fiberoptic bronchoscopy was used for final confirmation of LDLT positioning.

Main Results:

  • The use of smaller LDLT sizes (35 F for females, 37 F for males) resulted in minimal airway trauma.
  • The height-based formula provided encouraging results for predicting LDLT insertion depth.
  • Fiberoptic bronchoscopic confirmation remained a recommended method for ensuring accurate placement.

Conclusions:

  • Smaller LDLT sizes and a height-based insertion depth formula show promise in improving safety and efficacy in thoracic anesthesia.
  • These methods, combined with fiberoptic confirmation, can help reduce airway trauma during OLV.
  • Further research and standardization of these techniques are warranted for widespread clinical adoption.