Clinical trial · Observational
Comparison of Ultrasound, CT, and Classical Methods for Selecting Sizes and Placement of Left-Sided Double-Lumen Tubes
Comparison of Ultrasound and CT-Based Anatomical Measurements with Classical Methods for Predicting Size and Optimal Placement Depth of Left-Sided Double-Lumen Endobronchial Tubes in Thoracic Surgery
NCT06731517CI-TRIAL-00083632completedClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Investigators aimed to compare anatomical measurements obtained using ultrasound and computed tomography with classical methods to select the appropriate size of double-lumen tubes more quickly and easily and to determine the optimal depth of placement.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Thoracic Neoplasms | Thoracic Neoplasm | ONTOLOGY_EXACT | 0.98 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| intubation | Procedure | — | UNRESOLVED |
Design
Arms and outcomes
Arms (3)
- label
- Classical group
- description
- In the classical group, Double Lumen Tube selection was based on gender and height. For males, a 41 F tube was chosen if height \>170 cm, and a 39 F tube if height ≤170 cm. For females, a 37 F tube was used if height \>160 cm, and a 35 F tube if height ≤160 cm. The depth was determined using the formula: 12 + (patient height/10). The calculated depth was marked on the DLT, and after intubation, the mark was positioned at the level of the upper teeth.
- interventionNames
- Procedure: intubation
- label
- Ultrasonography group
- description
- In the Ultrasonography (USG) group, Double Lumen Tube selection was based on the transverse cricoid cartilage diameter measured preoperatively using ultrasound. A 41 F tube was selected if the cricoid diameter was ≥18 mm, 39 F for 16-17.9 mm, 37 F for 15-15.9 mm, 35 F for 13-14.9 mm, and 32 F for \<13 mm (Table 5) (5). To determine placement depth, the distance between the vocal cords and the Louis angle was measured (the Louis angle was used as a guide as it anatomically aligns with the carina). The position of the vocal cords was identified using USG. The measured length was marked starting from the bronchial cuff line, and this mark was positioned at the level of the vocal cords during intubation.
- interventionNames
- Procedure: intubation
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
- Maximum age
- 80 Years
Show eligibility criteria text
Inclusion Criteria: * Requiring lung isolation in thoracic surgery, * American Society of Anesthesiologists (ASA) risk score of 1-2-3, * Patients who are literate and able to provide informed consent Exclusion Criteria: * Patients with an ASA score of 4 or higher, * Criteria for difficult intubation, * Difficulty in mouth opening, small jaw deformities, * Abnormal cricoid cartilage appearance, * A history of laryngeal or neck surgery, * Preoperative throat pain and hoarseness, * Tumors and deformities in the main airway
References
Publications (8)
- BACKGROUNDZhang X, Wang DX, Wei JQ, Liu H, Hu SP. Recent advances in double-lumen tube malposition in thoracic surgery: A bibliometric analysis and narrative literature review. Front Med (Lausanne). 2022 Dec 14;9:1071254. doi: 10.3389/fmed.2022.1071254. eCollection 2022. PMID 36590949
- BACKGROUNDChang TR, Yuan MK, Pan SF, Chuang CC, So EC. Double-Lumen Endotracheal Tube-Predicting Insertion Depth and Tube Size Based on Patient's Chest X-ray Image Data and 4 Other Body Parameters. Diagnostics (Basel). 2022 Dec 14;12(12):3162. doi: 10.3390/diagnostics12123162. PMID 36553170
- BACKGROUNDWoo JH, Cho S, Kim YJ, Kim DY, Choi Y, Lee JW. Depth of double-lumen endobronchial tube: a comparison between real practice and clinical recommendations using height-based formulae. Anesth Pain Med (Seoul). 2023 Jan;18(1):37-45. doi: 10.17085/apm.22214. Epub 2023 Jan 10. PMID 36746900
- BACKGROUNDShiqing L, Wenxu Q, Yuqiang M, Youjing D. Predicting the Size of a Left Double-Lumen Tube for Asian Women Based on the Combination of the Diameters of the Cricoid Ring and Left Main Bronchus: A Randomized, Prospective, Controlled Trial. Anesth Analg. 2020 Mar;130(3):762-768. doi: 10.1213/ANE.0000000000003839. PMID 30286004
- BACKGROUNDBrodsky JB, Macario A, Mark JB. Tracheal diameter predicts double-lumen tube size: a method for selecting left double-lumen tubes. Anesth Analg. 1996 Apr;82(4):861-4. doi: 10.1097/00000539-199604000-00032. No abstract available. PMID 8615510
- BACKGROUNDEldawlatly AA. Double lumen tube: Size and insertion depth. Saudi J Anaesth. 2021 Jul-Sep;15(3):280-282. doi: 10.4103/sja.sja_192_21. Epub 2021 Jun 19. PMID 34764835
- BACKGROUNDLiu Z, Zhao L, Jia Q, Yang X, Liang SJ, He W. Chest Computed Tomography Image for Accurately Predicting the Optimal Insertion Depth of Left-Sided Double-Lumen Tube. J Cardiothorac Vasc Anesth. 2018 Apr;32(2):855-859. doi: 10.1053/j.jvca.2017.09.025. Epub 2017 Sep 20.