The comparison of the lengths and diameters of main bronchi measured from two-dimensional and three-dimensional images in the same patients

Lee, Jeong Woo; Son, Ji-Seon; Choi, Jin-Wook; Han, Youngjin; Lee, Jun-Rae

doi:10.4097/kjae.2014.66.3.189

Cited by 15 publications

(18 citation statements)

References 17 publications

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“…Considering that hormone levels may be suppressed in patients with acromegaly, there are two very distinct laboratory scenarios that can be compared from the clinical point of view: active acromegaly and controlled acromegaly. In this study, the only CT variable that showed a significant difference between these groups was the Δ LMB diameter, and the highest values were observed in patients with ‘active disease’ upon both inspiratory and expiratory CT. Because the LMB is narrower than the RMB in terms of both the anteroposterior and transverse diameter in CT images, we believe that the repercussions of the GH‐IGF‐I axis in patients with disease activity may be more easily understood based on LMB geometry relative to the trachea and RMB.…”

Section: Discussionmentioning

confidence: 98%

Computed tomography airway lumen volumetry in patients with acromegaly: Association with growth hormone levels and lung function

et al. 2017

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Section: Discussionmentioning

confidence: 98%

Computed tomography airway lumen volumetry in patients with acromegaly: Association with growth hormone levels and lung function

et al. 2017

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“…As for the selection of ideal DLT size, it is generally accepted that it should be based on the principle of smoothly inserting the largest type of tube into the target bronchus [29,30]. Conventionally, the size selection is based on a person's height and gender, which was also adopted in the control group [5].…”

Section: Discussionmentioning

confidence: 99%

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

Hou

Liu

Shi

et al. 2020

Preprint

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Background: Accurate placement of the right-sided double-lumen tube (RDLT) is still challenging. This study aims to explore the feasibility and accuracy of a modified intubation strategy by using a combination of computed tomography measurements and flexible video bronchoscope guidance.Methods: 108 adults requiring an RDLT for lung isolation were randomly allocated to 2 groups. Conventional fiberoptic bronchoscopy-guided technique was used in the control group. The following specifications applied to the modification group. Firstly, the length of the right main bronchus (RMB-L) and the anteroposterior diameter of RMB were measured in preoperative spiral computed tomography to predict the side and size of the tube; Then, a depth marker was made on RUSCH tube according to the difference between the RMB-L and the length of bronchia cuff (12 mm); Under the guidance of flexible video bronchoscope, the depth marker should be paralleled with the tracheal carina, and a characteristic white line on the tube should be paralleled with the secondary carina.Results: Compared with the control group, our modified strategy significantly increased the optimal plus acceptable position rate (76% vs. 98%, respectively; P < 0.039), decreased tube replacement rate (80% vs. 94%; P = 0.042), shortened the intubation time (101.4 ± 7.3 vs. 75.2 ± 8.1 seconds; P = 0.019), and had a lower incidence of transient hypoxemia (25% vs. 6%; P = 0.022), subglottic resistance (20% vs. 6%; P = 0.037), tracheobronchial injury (35% vs. 13; P = 0.037), and postoperative right upper lobe collapse (15% vs. 2%; P = 0.059).Conclusion: These data suggest the superiority of our modified technique compared to the conventional method for RDLT positioning.Trial registration: Chinese Clinical Trial Registry, ChiCTR1900021676, registered on 5 March 2019. URL of trial registry: http://www.chictr.org.cn/showprojen.aspx?proj=33189

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“…In this study, the airway trees could be extracted through using the 3D software by one-click, and the orthogonal section image perpendicular to the segmental bronchi was selected from the 3D bronchial tree image. In addition, the long and short diameters of the airway in the selected layers were measured by the software automatically, and the accuracy of the inner bronchial diameter measured by the 3D image was much higher than that by the 2D image [26].…”

Section: Discussionmentioning

confidence: 99%

Segmental Bronchial Diameter Measurement at Inspiration-Expiration Phase by Low-dose MSCT in Healthy Volunteers

He¹,

Qingyun²,

Liu³

2019

IJBMR

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Objective: This study aimed to evaluate the normal range of quantitative CT in measuring the airway diameter at inspiration-expiration phase using 3D imaging in healthy adults. Materials and Methods: 68 healthy volunteers, including 42 males and 26 females, with the mean age of 49.3 (SD14.7) years, had undergone low-dose CT scan at full inspiration and the end of expiration. All CT scans were performed within the range from the lung apices to the diaphragm, at a tube potential of 120kVp and an effective mAs of 60. Afterwards, all CT images were analyzed using the 3D software (FUJIFILM Corporation SYNAPSE), and the airway tree was generated according to the automated region-growing technique, which was perpendicular to the cross section measurement of the segmental bronchus in bilateral lower lobes. Meanwhile, the imaging of segmental bronchus was classified as at inspiration and expiration phase in male group, and at inspiration and expiration phase in female group. Moreover, the Din-L and DinS of the segmental bronchus were analyzed quantitatively. Difference in the segmental bronchial diameter between the inspiration and expiration phase group with the same sex was evaluated with paired-t test, while that between the male and female groups was analyzed by a 2-tailed unpaired t test. In addition, the impact of age, height, weight and BMI on Din-L and DinS was assessed through multiple linear regression analysis. Results: 378 segmental branches in the lower lobe of lung from male group and 234 from female group were shown using the low-dose multi-slice spiral CT (MSCT) scan. All segmental bronchi were detected automatically using the 3D software. Our results suggested that, Din-L and DinS in segmental bronchus of both male and female groups at inspiration phase were larger than those at expiration phase; and those in male group were greater than those in female group at both inspiration and expiration phases (P < 0.01). Meanwhile, the average of Din-L and DinS was markedly related to age at both inspiration and expiration phases. Conclusions: The normal reference values and the likely ranges are determined for segmental bronchus diameter in the lower lobe of adult lung at inspiration-expiration phase. The average of Din-L and DinS is evidently correlated with age and sex at both inspiration and expiration phases. The segmental bronchus diameter at inspiration phase in adolescents is larger than that at expiration phase.

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The comparison of the lengths and diameters of main bronchi measured from two-dimensional and three-dimensional images in the same patients

Cited by 15 publications

References 17 publications

Computed tomography airway lumen volumetry in patients with acromegaly: Association with growth hormone levels and lung function

Computed tomography airway lumen volumetry in patients with acromegaly: Association with growth hormone levels and lung function

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

Segmental Bronchial Diameter Measurement at Inspiration-Expiration Phase by Low-dose MSCT in Healthy Volunteers

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