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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT05994898
Other study ID # UHFUSGGO01
Secondary ID
Status Recruiting
Phase
First received
Last updated
Start date January 4, 2023
Est. completion date June 30, 2024

Study information

Verified date March 2024
Source Peking Union Medical College Hospital
Contact Xuehan Gao, MD
Phone +86 18801341299
Email gaoxh1299@163.com
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The purpose of this study is to assess the feasibility of UHFUS on detection of GGOs in excised lung tissue and investigate UHFUS features of GGO in vitro. Each GGO was detected by palpation, UHFUS and open biopsy in sequence. The comparison of detection rate and time consumption were analyzed respectively. The Bland-Altman analysis was used to estimate the agreement of tumor size measured by CT, UHFUS and pathology.


Description:

Lung cancer (LC) is a leading cause of mortality worldwide. According to the International Agency for Research (IARC) on Cancer, LC was projected to contribute to 2.3 million new cancer cases and 1.8 million deaths worldwide in 2020. With widespread use of chest computed tomography (CT), LC is increasingly detected at an early stage, in which 63%-95% lesions present as ground glass opacity (GGO). GGO refers to a non-specific radiological appearance, referring to a focal, hazy shadow with increased attenuation that does not obscure the contours of bronchi or blood vessels on CT. It can be benign lesions, preinvasive, or invasive adenocarcinoma. Surgery is the main treatment for suspected malignant GGOs. Whether excised targeted GGOs thoroughly affects patients' prognosis crucially, especially for patients with multiple GGOs. Generally, the most frequent intraoperative location approach of pulmonary nodules is palpation, which distinguished by the texture between normal lung tissue and nodules. However, different from solid nodules, the texture of GGO nodules is similar to lung parenchyma that increases the difficulty of palpation localization. Thus, detection of GGOs and in lung tissue poses a common challenge, particularly in the presence of pure GGO (tumor without an solid component) and small GGO nodules (≤1cm). In the current clinical practice, even with preoperative localization (CT-guided percutaneous and intraoperative electromagnetic navigation bronchoscopy), it remains challenging to confirm complete resection of all small, pure GGOs. Therefore, there is an urgent need for a new method that can accurately evaluate nodules in excised lung tissue. Since Roberto used thoracoscopic ultrasound (TUS) to examine pulmonary nodules in 1999, subsequently, several studies have validated the safety and efficacy for using US in identifying pulmonary nodules intraoperatively. However, past research all focused on solid nodules or large nodules (maximum diameter more than 2cm) using 5-12MHz US transducer. Few studies have studied the detection rate of small GGO nodules. Previous studies have found 12MHz of US probe could show pulmonary nodules better than 5MHz and 7.5MHz. Ultrahigh frequency ultrasound (UHFUS) refers to higher frequency (≥20MHz) ultrasound waves with higher resolution even less than 50μm. It is capable to display nodules less than 3mm distinctively in the extremely superficial tissue, which may satisfy intraoperative GGO imaging requirement. Therefore, the objects of this study are to assess the feasibility of localizing GGOs in excised lung tissue by UHFUS and further summarize its UHFUS features.


Recruitment information / eligibility

Status Recruiting
Enrollment 50
Est. completion date June 30, 2024
Est. primary completion date June 30, 2024
Accepts healthy volunteers No
Gender All
Age group N/A and older
Eligibility Inclusion Criteria: 1. Patients with targeted nodules identified as lesions required surgical removed such as main lesion and high-risk nodules; 2. Patients who accept VATS or RATS resection. Exclusion Criteria: 1. Patients refused enrollment in the trial; 2. Pulmonary nodules were labelled during the operation.

Study Design


Related Conditions & MeSH terms


Locations

Country Name City State
China Department of thoracic surgery Beijing Beijing

Sponsors (1)

Lead Sponsor Collaborator
Peking Union Medical College Hospital

Country where clinical trial is conducted

China, 

References & Publications (9)

Hou YL, Wang YD, Guo HQ, Zhang Y, Guo Y, Han H. Ultrasound location of pulmonary nodules in video-assisted thoracoscopic surgery for precise sublobectomy. Thorac Cancer. 2020 May;11(5):1354-1360. doi: 10.1111/1759-7714.13384. Epub 2020 Mar 17. — View Citation

Matsunaga T, Suzuki K, Takamochi K, Oh S. What is the radiological definition of part-solid tumour in lung cancer?dagger. Eur J Cardiothorac Surg. 2017 Feb 1;51(2):242-247. doi: 10.1093/ejcts/ezw344. — View Citation

Santambrogio R, Montorsi M, Bianchi P, Mantovani A, Ghelma F, Mezzetti M. Intraoperative ultrasound during thoracoscopic procedures for solitary pulmonary nodules. Ann Thorac Surg. 1999 Jul;68(1):218-22. doi: 10.1016/s0003-4975(99)00459-2. — View Citation

Sortini D, Feo CV, Carcoforo P, Carrella G, Pozza E, Liboni A, Sortini A. Thoracoscopic localization techniques for patients with solitary pulmonary nodule and history of malignancy. Ann Thorac Surg. 2005 Jan;79(1):258-62; discussion 262. doi: 10.1016/j.athoracsur.2004.06.012. — View Citation

Sung H, Ferlay J, Siegel RL, Laversanne M, Soerjomataram I, Jemal A, Bray F. Global Cancer Statistics 2020: GLOBOCAN Estimates of Incidence and Mortality Worldwide for 36 Cancers in 185 Countries. CA Cancer J Clin. 2021 May;71(3):209-249. doi: 10.3322/caac.21660. Epub 2021 Feb 4. — View Citation

Ujiie H, Kato T, Hu HP, Hasan S, Patel P, Wada H, Lee D, Fujino K, Hwang DM, Cypel M, de Perrot M, Pierre A, Darling G, Waddell TK, Keshavjee S, Yasufuku K. Evaluation of a New Ultrasound Thoracoscope for Localization of Lung Nodules in Ex Vivo Human Lungs. Ann Thorac Surg. 2017 Mar;103(3):926-934. doi: 10.1016/j.athoracsur.2016.08.031. Epub 2016 Oct 17. — View Citation

Wada H, Anayama T, Hirohashi K, Nakajima T, Kato T, Waddell TK, Keshavjee S, Yoshino I, Yasufuku K. Thoracoscopic ultrasonography for localization of subcentimetre lung nodules. Eur J Cardiothorac Surg. 2016 Feb;49(2):690-7. doi: 10.1093/ejcts/ezv124. Epub 2015 Apr 7. — View Citation

Yamamoto M, Takeo M, Meguro F, Ishikawa T. Sonographic evaluation for peripheral pulmonary nodules during video-assisted thoracoscopic surgery. Surg Endosc. 2003 May;17(5):825-7. doi: 10.1007/s00464-002-8900-0. Epub 2003 Jan 18. — View Citation

Zhang Y, Fu F, Chen H. Management of Ground-Glass Opacities in the Lung Cancer Spectrum. Ann Thorac Surg. 2020 Dec;110(6):1796-1804. doi: 10.1016/j.athoracsur.2020.04.094. Epub 2020 Jun 7. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Other UHFUS imaging features UHFUS imaging features of GGOs From enrollment to the end of surgery
Other Tumor size The agreement of tumor size measured by CT, UHFUS and pathology From enrollment to the pathology of GGOs were confirmed (4 weeks after sugery)
Primary Detection rate Detection rate of UHFUS and palpation methods From enrollment to the pathology of GGOs were confirmed (4 weeks after sugery)
Secondary Detection time Detection time of UHFUS and palpation methods From enrollment to the end of surgery
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