Double-lumen Tube Placement Research Articles

Effect of a 3D-printed reconstruction automated matching system for selecting the size of a left double-lumen tube: a study protocol for a prospective randomised controlled trial

IntroductionLung isolation is primarily accomplished using a double-lumen tube (DLT) or bronchial blocker. A precise and accurate size of the DLT is a prerequisite for ensuring its accurate placement. Three-dimensional...

Individualized rotation of left double lumen endobronchial tube to improve placement success rate: a randomized controlled trial

BackgroundIn conventional practice, the left double lumen tube (DLT) is rotated 90° counterclockwise when the endobronchial cuff passes glottis. Success rate upon the first attempt is < 80%, likely owing to varying morphology of the bronchial bifurcation.MethodsWe conducted a randomized controlled trial to compare 90° counterclockwise rotation versus individualized degree of rotation in adult patients undergoing elective thoracic surgery using left DLT. The degree of rotation in the individualized group was based on the angle of the left main bronchi as measured on computed tomography (CT). The primary outcome was the first attempt left DLT placement success rate.ResultsA total of 556 patients were enrolled: 276 in the control group and 280 in the individualized group. The average angle of the left main bronchi was 100.6±9.5° (range 72° to 119°). The first attempt left DLT placement success rate was 82.6% (228/276) in the control group versus 91.4% (256/280) in the individualized group (P=0.02, χ2 test). The rate of carina mucosal injury, as measured at 30 min after the start of surgery under fibreoptic bronchoscopy, was significantly lower in individualized group than control group (14.0% versus 19.6%, P=0.041). The individualized group also had lower rate of postoperative sore throat (29.4% versus 44.0%, P<0.001) and hoarseness (16.8% versus 24.7%, P＜0.05).ConclusionsIndividualized rotation of left DLT based on the angle of the left main bronchi on preoperative CT increased first attempt success rate in adult patients undergoing elective thoracic surgery.Trial registrationThe trial is registered at Chinese Clinical Trial Registry (ChiCTR2100053349; principal investigator Xiang Quan, date of registration November 19, 2021).

Utilization of an Endobronchial Blocker Through a Double-Lumen Tube as Rescue for Inadequate One-Lung Ventilation.

Failure to provide one-lung ventilation can prohibit minimally invasive thoracic surgeries. Strategies for one-lung ventilation include double-lumen endotracheal tubes or endobronchial blockers, but rarely both. Inability to provide lung isolation after double-lumen endotracheal tube placement requires troubleshooting and sometimes the use of extra equipment. This case describes using a unique Y-shaped endobronchial blocker placed through a left-sided double-lumen endotracheal tube after failure to achieve lung isolation with a double-lumen endotracheal tube alone.

Perioperative Management Challenges for Post-Tuberculous Stage-III Empyema with Massive Pneumothorax Mimicking Vanishing Lung Syndrome: A Case Report

Surgical resection is frequently the intervention required for post-tuberculous empyema or other sequels. However, pneumonectomy may not be feasible in some situations, and video-assisted thoracoscopic surgery (VATS) plays a role in such a scenario. Whether a patient undergoes open resection of VATS, isolation of infected lung is integral to one-lung ventilation and better access to the surgical field, and a double-lumen tube (DLT) remains the preferred choice. Difficulties in DLT placement after pneumonectomy are reported; however, failure to isolate a lung by appropriately placed DLT is scarce or absent. A 28-year cachectic gentleman with poor preoperative lung function was suffering from endobronchial tuberculosis. He also had one episode of tuberculosis twelve-year back. At presentation, he had a massive pneumothorax and stage-III empyema as a sequel, including a rare finding of plastered mediastinum mimicking vanishing lung syndrome. He underwent uniportal-VATS under general anesthesia using one-lung ventilation. Complete lung destruction from active tuberculosis and its sequel leading to the plastered mediastinum and deformed airway pose a significant lung isolation challenge. U-VATS can be considered for therapeutic purpose where standard thoracotomy and pneumonectomy is contra-indicated. However, lung isolation in such patients is tricky and poses a risk. The present case highlights the challenges faced with lung isolation using a DLT and discusses the probable remedy to these problems.

Combination of computed tomography measurements and flexible video bronchoscope guidance for accurate placement of the right-sided double-lumen tube: a randomised controlled trial

ObjectiveTo compare the modified strategy for the right-sided double-lumen tube (R-DLT) placement using a combination of CT measurements and flexible video bronchoscopy guidance with traditional bronchoscopy technique.Trial design, setting and...

Comparison of lung ultrasound technique versus clinical method to evaluate the accuracy of size and placement of left endobronchial double lumen tube in patients undergoing elective thoracic surgery: a prospective observational study.

Anthropometric measurements like height and gender have been frequently found to be inaccurate in prediction of size of double lumen tube (DLT). A tracheal ultrasonography (TUS) is a technique that can be used to predict the size of DLT and its correct placement for lung isolation. We aim to check the accuracy of ultrasound over clinical methods. This prospective study included 68 patients undergoing elective thoracic surgery requiring one-lung ventilation (OLV) with DLT. The groups were assessed for the size of DLT by either anthropometric measurement using height and gender (Group C) or ultrasound method (Group U). Further, the accuracy of placement of DLT was assessed through, either lung auscultation in group C or various ultrasonographic and ventilatory parameters such as lung isolation in the first attempt (lung sliding and lung pulse sign), oxygenation status and peak airway pressure, in group U. Surgeon satisfaction score was also compared in both the groups. The accuracy of predicted DLT size between Group C and Group U was statistically significant (p=0.044). In Group C, 56% of patients showed a mismatch between the predicted DLT size and the actual size required, while in Group U, the mismatch was only 32.4%. The accuracy of DLT placement through group C was 41% as compared to 79% in Group U. Surgeon satisfaction score was also significantly higher in Group U as compared to Group C (p=0.0028). Thus, our study suggests that tracheal and chest ultrasonography for DLT size selection and placement for lung isolation is superior to clinical methods.

Successful Placement of Double-Lumen Tube in a Rare Case of Distorted Tracheobronchial Anatomy

Successful Placement of Double-Lumen Tube in a Rare Case of Distorted Tracheobronchial Anatomy

A comment on 'An algorithm for difficult double lumen tube placement and troubleshooting a malpositioned double lumen tube harnessing A, B, Cs of lung isolation'.

A comment on 'An algorithm for difficult double lumen tube placement and troubleshooting a malpositioned double lumen tube harnessing A, B, Cs of lung isolation'.

Effect of intubation in the lateral position under general anesthesia induction on the position of double-lumen tube placement in patients undergoing unilateral video-assisted thoracic surgery: study protocol for a prospective, single-center, parallel group, randomized, controlled trial

BackgroundThe double-lumen tube (DLT) is an essential equipment for thoracic anesthesia and the precise position of DLT placement is particularly important for anesthesia and surgery. However, the incidence of DLT malposition remains high and it leads to lung isolation failure and hypoxemia during one-lung ventilation. This trial aims to explore the clinical application and efficacy of intubation in the lateral position under general anesthesia induction to reduce the incidence of DLT malposition in patients undergoing unilateral video-assisted thoracic surgery (VATS).MethodsIn this prospective, single-center, parallel group, randomized, controlled trial, we will recruit 108 patients, aged 18–80 years, scheduled for elective unilateral VATS with DLT intubation under general anesthesia, and they will be randomly assigned to two groups: a lateral DLT intubation group (group L) and a conventional supine DLT intubation group (group C). The left-sided DLT will be used to intubate in patients of both groups. The position of DLT will be confirmed and adjusted by using the fiberoptic bronchoscopy (FOB). The primary outcome is the incidence of DLT malposition observed via the FOB, and the secondary outcomes include the time of intubation, the frequency and duration of re-adjustments of DLT placement under FOB, whether to re-intubate, intraoperative vital signs, and postoperative recovery.DiscussionAccurate DLT positioning is crucially important for thoracic surgery, but the incidence of DLT malposition is still high in the present clinical practice of thoracic anesthesia. This trial aims to investigate whether lateral DLT intubation can reduce the incidence of DLT malposition, with more stable intraoperative vital signs and less postoperative complications.Trial registrationThe study protocol was registered at Chinese Clinical Trial Registry (http://www.chictr.org.cn) with registration number: ChiCTR2200060794 on June 11, 2022.

A SINGLE ARM PILOT STUDY TO DETERMINE WHETHER AN EARLY CREATION OF PNEUMOTHORAX IN THE NON-VENTILATED LUNG IMPROVES THE QUALITY OF LUNG COLLAPSE DURING ONE LUNG VENTILATION.

<h3>Objective</h3> Rapid and complete collapse of the non-ventilated lung is desirable in minimally invasive thoracic surgery. Inadequate collapse leads to unsatisfactory surgical exposure resulting in excessive retraction of the lung and surrounding vascular structures causing haemodynamic disturbances, mechanical injury to the lung and longer procedure time. Despite good lung separation and application of various measures, in our practice, the incidence of complete collapse (atelectasis) at the time of insertion of the access port is low (around 15 - 20 %). We theorized that creation of pneumothorax in the non-ventilated lung would reduce the residual lung volume facilitating absorption atelectasis. We therefore conducted a pilot study to investigate if creating pneumothorax early in the non-ventilated lung improved the quality of lung collapse at the time of port insertion. <h3>Design and Method</h3> This single arm pilot study was conducted on a convenient sample size of twenty five patients after Institutional Ethics Committee approval. The study was registered in the national registry. All patients scheduled for minimally invasive video assisted thoracic surgery (VATS) and planned for a left sided double lumen tube (DLT) placement for lung isolation were recruited after written informed consent. After induction of anaesthesia and placement of DLT, lung collapse was confirmed by ultrasonography. Under aseptic precautions, a sterile 16 G cannula was used to puncture the pleura along the mid axillary line in the fourth intercostal space to enter the intrapleural space and create a pneumothorax in the operative hemithorax. The canula was then kept open to atmosphere for around 20 minutes till surgical site preparation. Immediately after insertion of thoracoscopy access port, a video of the collapsed lung was recorded. The time between creation of pneumothorax and insertion of thoracoscopy access port was noted. All video recordings were later assessed by two thoracic surgeons who independently scored the degree of lung collapse. The mean of the two scores was calculated. The lung collapse score was recorded on a numerical scale of 1-10 with 1 signifying complete collapse and 10 signifying a non-collapsed lung touching the chest wall. Cases with failed lung isolation or significant adhesions were excluded. <h3>Results</h3> Out of twenty five patients, one patient had an excellent collapse with a score of 3.5, twenty two patients had collapse scores between 4-7 while the other two had scores between 8-10. The mean score was 6.0 with a standard deviation of 1.24. The mean duration between creation of pneumothorax and port insertion was 29 minutes. <h3>Conclusion</h3> Creation of pneumothorax early during one lung ventilation did not result in high incidence of excellent lung collapse. Modifications to the technique could result in better results and should be explored.

The anatomical landmarks for positioning of double lumen endotracheal tube using flexible bronchoscopy: A prospective observational study

BackgroundTo examine the tracheobronchial anatomy and its common variations after double-lumen tube (DLT) placement, and to determine the anatomical landmarks that can be easily identified by practitioners for DLT positioning. MethodIn total, 200 patients with American Society of Anesthesiologists I–II, who were aged 20–75 years and scheduled for video-assisted thoracic surgery (VATS), were prospectively enrolled. The types of DLT position in each patient was recorded [Type I, the DLT bronchial end was in the left main bronchus (LMB), and the primary carina could be observed; Type Ⅱ, the DLT bronchial end was in the right bronchus intermedius (RBI); and Type III, an unidentified trachea or bronchus wall was observed from the DLT tracheal lumen] and the main tracheobronchial tree images were collected using Flexible bronchoscopy (FB). ResultFive patients were excluded due to excessive bronchus secretions impacting image collection. Type Ⅰ, II, and III positions of DLT were detected in 134 (68.7%) patients, 28 (14.4%) patients, and 33 (16.9%) patients, respectively. Examples of the tracheobronchial tree, common features, and variations in each lung lobe were demonstrated using FB. Furthermore, image analysis showed that each superior segment orifice of the right lower lobe (RLL) and the left lower lobe (LLL) was less variable and recognizable, determining it an important anatomical landmark for DLT positioning. ConclusionThe tracheobronchial tree and its common variations after DLT placement were described. The superior segment orifice of the RLL and LLL can be considered as an important landmark for DLT positioning.

An algorithm for difficult double lumen tube placement and troubleshooting a malpositioned double lumen tube harnessing A, B, Cs of lung isolation.

An algorithm for difficult double lumen tube placement and troubleshooting a malpositioned double lumen tube harnessing A, B, Cs of lung isolation.

Effect of placing double-lumen irrigation-suction tube on closure of anastomotic defect following rectal cancer surgery.

This study aimed to investigate the effect of placement of double-lumen irrigation-suction tubes (DLIST) on the closure of anastomotic defect (AD) after rectal cancer surgery. The study was carried out at two centers managed by one surgeon, both adopted the same treatments. Patients with postoperative AD after rectal cancer surgery from January 2011 to June 2020 were eligible and were divided into a passive drainage (PD) group and a DLIST group according to whether the PD, placed in the rectal cancer surgery, had been replaced with the DLIST. The effect of DLIST on the AL was evaluated. There distributed 76 patients in the DLIST group and 52 in the PD group. A higher closure rate was reported in the DLIST group (46 patients in DLIST group, for a closure rate of 60.5%, and 21 patients in PD group, for a closure rate of 40.4%. HR = 3.05; 95% CI: 1.79-5.19; P < 0.001). Both length of stay and costs of the treatment in the DLIST group were lower (54days [interquartile range, IQR: 41-17] days vs. 112days [IQR: 66-27] days, P = 0.005; and $18,721 [IQR: $14,982-4,960] vs. $40,840 [IQR: $20,932-50,529], P < 0.001). Placement of DLIST might serve as an effective method for treating AD following rectal cancer surgery. In comparison with PD, it costs lower to apply DLIST in the treatment of AD and the length of stay is shorter.

A Randomised Control Study Comparing C-MAC D-Blade Video Laryngoscope (Hyper Angulated Blade) and Macintosh Laryngoscope for Insertion of a Double-Lumen Tube in Patients Undergoing Elective Thoracotomy.

The use of a double-lumen endotracheal tube is one of the common anesthetic techniques for operations in the thoracic cavity. However, when compared to a single-lumen tube, placement of a double-lumen tube is technically more difficult as a result of which it takes more time to insert and is associated with more complications such as mucosal injury, hoarseness, and sore throat, even in patients with no anticipated airway difficulty. The CMAC D-blade that is usually used in patients with anticipated airway difficulty, could assist in smooth and quick placement of double-lumen tube (DLT) even in patients with no anticipated airway difficulty. This study aimed to evaluate the effectiveness of the C-MAC D-blade in reducing the time taken to visualize the glottis and intubate patients with normal airway with a double-lumen tube. This was a prospective open-label randomized control trial in a tertiary hospital. Seventy-three consenting adult patients with physical status classes I and II, as determined by the American Society of Anesthesiologists, scheduled to undergo elective thoracotomy, were randomly allocated to receive either C-MAC D-blade (Group D) or Macintosh blade (Group M). The primary objective was to compare the time taken for visualization of the glottis and intubation. Chi-square/Fisher's exact test and t-test were used for statistical analysis. Seventy-three patients were randomized (Group D = 36; Group M = 37). Time to visualize the glottic structures (4.56 ± 2.396 s vs. 7.27 ± 4.891 s, P = 0.01) was significantly better in Group D; however, the mean intubation time was comparable (55.92 ± 18.749 s vs. 51.08 ± 15.269 s, P = 0.61). C-MAC D-blade videolaryngoscope offers a better glottic view and lesser time to visualize glottis when compared with the Macintosh laryngoscope. However, the time taken to insert the DLT after visualization was longer. We infer that there is no advantage in the routine use of C-MAC D-blade for DLT insertion in patients with no anticipated airway difficulty.

Double-lumen Tube Position Confirmation with Fiberoptic Bronchoscope after Turning Patients into Lateral Position: Is It Necessary?

Background: Our goal was to compare two common methods including auscultation and Fiber-Optic Bronchoscopy (FOB) in confirming the correct placement of Double-Lumen Tube (DLT).&#x0D; Methods: Seventy six patients were enrolled. After DLT insertion, clinical verification was made by auscultation, then FOB was applied. At lateral decubitus, the position of DLT was rechecked by auscultation, and then by FOB. The incorrect position including malposition and misplacement were compared between two routine methods of auscultation and FOB.&#x0D; Results: After blind intubation, 21.1% of DLTs were considered to be in an incorrect position. Meanwhile, FOB showed that 46.1% of DLTs were not placed correctly. Among all the patients, 53.9% of DLTs were in the optimal position. Misplacement was diagnosed in 35.5% and malposition in 10.5% of the patients. After positioning to the lateral decubitus, using auscultation, we found that 5.3% of tubes were dislocated, but according to FOB, it was 10.5%. The agreement coefficient between auscultation and FOB was 0.42 in the supine position and 0.64 in lateral position.&#x0D; Conclusion: Our results showed that although FOB needs more time to check the position of DLT, it should be used to confirm the exact position of DLT.

Comparison of Airtraq DL™ and Macintosh laryngoscope for double-lumen tube placement in simulated difficult airway: A randomised study.

ABSTRACTBackground and Aims:The Airtraq DL ™ is a prototype channeled video laryngoscope, designed specifically for endobronchial intubation with a double-lumen tube (DLT). Evidence on its superiority over Macintosh laryngoscope for DLT placement in the difficult airway is limited. This study compared the efficacy of both these laryngoscopes in the simulated difficult airway.Methods:A prospective randomised controlled study was conducted on 52 patients undergoing elective thoracic surgery with lung isolation using a left-sided DLT. The patients were randomised into Airtraq DL ™ group (group A) and Macintosh group (group M). The primary objective was to compare the time required for intubation, and the secondary objectives were to evaluate time to best glottic view, Cormack–Lehane (CL) grading, intubation difficulty score (IDS), manoeuvres, attempts at intubation, haemodynamic response and complications. Operating anaesthesiologists were also asked to grade the ease of laryngoscopy and intubation for both devices on a 4-point Likert scale.Results:The mean time to intubation was found to be lesser in group A than in group M (18 ± 6.91 s vs 25.48 ± 9.47 s, P = 0.003). Group A showed better CL grading (P ≤ 0.001), lesser requirement of manoeuvres (P = 0.02) and lower IDS (P = 0.003). Also, group A had significantly better Likert scale results as compared to group M.Conclusion:The Airtraq DL ™ is superior to Macintosh laryngoscope as it requires lesser time for intubation and provides favourable intubating conditions (better CL grading, lesser manoeuvres, lower IDS and improved Likert scales) for double-lumen placement in the simulated difficult airway.

Lung ultrasound is non-inferior to bronchoscopy for confirmation of double-lumen endotracheal tube positioning: a randomized controlled noninferiority study

BackgroundAppropriate placement of left-sided double-lumen endotracheal tubes (LDLTs) is paramount for optimal visualization of the operative field during thoracic surgeries that require single lung ventilation. Appropriate placement of LDLTs is therefore confirmed with fiberoptic bronchoscopy (FOB) rather than clinical assessment alone. Recent studies have demonstrated lung ultrasound (US) is superior to clinical assessment alone for confirming placement of LDLT, but no large trials have compared US to the gold standard of FOB. This noninferiority trial was devised to compare lung US with FOB for LDLT positioning and achievement of lung collapse for operative exposure.MethodsThis randomized, controlled, double-blind, noninferiority trial was conducted at the Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand from October 2017 to July 2019. The study enrolled 200 ASA classification 1–3 patients that were scheduled for elective thoracic surgery requiring placement of LDLT. Study patients were randomized into either the FOB group or the lung US group after initial blind placement of LDLT. Five patients were excluded due to protocol deviation. In the FOB group (n = 98), fiberoptic bronchoscopy was used to confirm lung collapse due to proper positioning of the LDLT, and to adjust the tube if necessary. In the US group (n = 97), lung ultrasonography of four pre-specified zones (upper and lower posterior and mid-axillary) was used to assess lung collapse and guide adjustment of the tube if necessary. The primary outcome was presence of adequate lung collapse as determined by visual grading by the attending surgeon on scale from 1 to 4. Secondary outcomes included the time needed to adjust and confirm lung collapse, the time from finishing LDLT positioning to the grading of lung collapse, and intraoperative parameters such has hypotension or hypertension, hypoxia, and hypercarbia. The patient, attending anesthesiologist, and attending thoracic surgeon were all blinded to the intervention arm.ResultsThe primary outcome of lung collapse by visual grading was similar between the intervention and the control groups, with 89 patients (91.8%) in the US group compared to 83 patients (84.1%) in the FOB group (p = 0.18) experiencing adequate collapse. This met criteria for noninferiority per protocol analysis. The median time needed to confirm and adjust LDLT position in the US group was 3 min (IQR 2–5), which was significantly shorter than the median time needed to perform the task in the FOB group (6 min, IQR 4–10) (p = 0.002).ConclusionsIn selected patients undergoing thoracic surgery requiring LDLT, lung ultrasonography was noninferior to fiberoptic bronchoscopy in achieving adequate lung collapse and reaches the desired outcome in less time.Trial RegistrationThis study was registered at clinicaltrials.gov, NCT03314519, Principal investigator: Kasana Raksamani, Date of registration: 19/10/2017.

Abstract No. : ABS0814: Comparison of lung ultrasound technique versus clinical method to evaluate the accuracy of positioning of left endobronchial double lumen tube in patients undergoing elective thoracic surgery- a prospective observational study

Background & Aims:Clinical methods like height and gender were found to be inaccurate in predicting the size of double-lumen tube (DLT).Tracheal ultrasonography (TUS) reliably predicts the size of DLT by measuring tracheal diameter. The aim wasto check theaccuracy of ultrasound over clinical methods.Methods:This study was conducted on 68 patients undergoing elective thoracic surgery requiring one-lung ventilation (OLV) withDLT. The subjects were divided into two groups depending on the prediction of size of DLT by either clinical (Group1) orultrasound method. (Group 2). The transducer was placed perpendicular to skin over cricoid cartilage to measure the transversediameter of the column of air in the cricoid cartilage which denoted the size of the DLT. The primary objective of the study was to assess the accuracy in prediction of size and placement of DLT through various parameters in both clinical andultrasound groups.Results:The accuracy of predicted DLT size between the Group U and Group C was found to be statistically significant (p=0.044). In Group 1, 56% of patients showed a mismatch between the predicted DLT size and the actual size required, while in Group 2, the mismatch was only 32.4%. The accuracy of placement of DLT in the first attempt suggested by adequate lung isolation was also significantly higher (p=0.028) in the ultrasound group compared to the clinical group.Conclusion:The size of DLT can be predicted by using clinical parameters but have low accuracy. In our study, the size of DLT was calculated by measuring tracheal diameter using TUS, which significantly improved the selection of appropriate DLT size, avoiding complications.Actual DLT usedGroup 1Group 2Z test No.%No.%Same as predicted1544.02367.6Z=-2.01, P=0.044*Higher that predicted823.5514.7Lower than predicted1132.5617.6Total34100.034100.0

Fluoroscopy, a useful alternative for confirming accurate placement of double-lumen tube or bronchial blocker.

Fluoroscopy, a useful alternative for confirming accurate placement of double-lumen tube or bronchial blocker.

Novel Use of Flexible Paediatric Video-Ureteroscope to Confirm Double Lumen Tube Placement as an Alternative to the Conventional Bronchoscope

Whilst a double lumen tube (DLT) is the gold standard for one lung ventilation, its double curvatures and increased diameter can make intubation difficult, potentially compounded by a challenging airway. We describe the successful placement of DLT in a difficult airway, and confirmation of the appropriate placement of DLT by using flexible paediatric video-ureteroscope (digital Olympus URF-V2/V2R), without which the purpose of achieving lung isolation was not possible.