Efficacy and Safety of Cryoablation with Robotic Bronchoscopy System in Patients with Lung Cancer

The goal of this single-arm clinical trial is to evaluate the safety and efficacy of robotic bronchoscopy system (RBS)-assisted cryoablation in the treatment of primary lung cancer in adult patients (aged ≥18 years) with histologically confirmed non-resectable primary lung cancer, regardless of gender. The main questions it aims to answer are:

Does RBS-assisted cryoablation achieve a predefined target technical success rate for complete tumor ablation under imaging guidance? Is the incidence of severe procedure-related adverse events within an acceptable safety threshold ?

Participants will:

Provide written informed consent for RBS-assisted cryoablation.

Undergo pretreatment evaluations, including:

Multimodal imaging (CT/PET-CT) for tumor localization and staging. Pulmonary function tests and cardiopulmonary risk assessment. Receive RBS-guided cryoablation therapy under general anesthesia. Be monitored for intraoperative complications and postoperative adverse events for 72 hours.

Complete follow-up assessments at 1, 3, 6, and 12 months post-procedure, including:

Contrast-enhanced CT scans to evaluate local tumor control. Documentation of symptom progression and quality-of-life metrics.

Study Overview

• Status: Not yet recruiting
• Conditions: Lung Cancer Patients
• Intervention / Treatment: Procedure: robotic bronchoscopy system

• Study Type: Interventional
• Enrollment (Estimated): 10
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Changhao Zhong; Phone Number: 020-81566640; Email: vast1982@126.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• (1) Age ≥ 18 years old, regardless of gender. (2) Diagnosed with peripheral lung cancer, with the maximum diameter of the tumor ≤ 3 cm and the number of tumors ≤ 3. (3) The lesion to be ablated is evaluated as suitable for bronchoscopy-guided cryoablation treatment. (4) The subject refuses or is deemed unsuitable for radiotherapy/chemotherapy, or shows no response to previous radiotherapy/chemotherapy, or experiences disease progression after radiotherapy/chemotherapy. (5) Assessed as ineligible for surgery or refuses surgery and radiotherapy, consents to receive initial ablation treatment, and signs the informed consent form.

Exclusion Criteria:

• (1) Diffuse lesions in both lungs where ablation treatment is unlikely to improve the condition. (2) Presence of hilar lymph node metastasis or extrapulmonary metastasis as indicated by examinations within 1 month before the operation (except for extrapulmonary metastasis that has been controlled by local treatment). (3) Presence of contraindications for bronchoscopy, or inability to tolerate or cooperate with bronchoscopy. (4) Severe bleeding tendency, uncorrectable coagulation dysfunction (prothrombin time > 18 s, prothrombin activity < 40%). (5) Platelet count < 70×109/L, or anticoagulant and/or antiplatelet drugs have not been discontinued for more than 1 week before ablation (except for prophylactic use of low-molecular-weight heparin before the operation). (6) Severe impairment of lung function, with maximum ventilation < 40%. (7) Concurrent with other tumors and extensive metastasis, with an expected survival period of less than 3 months. (8) Poor general condition (multiple metastases throughout the body, severe infection, high fever), infectious and radiation-induced inflammation around the lesion, obvious cachexia, severe insufficiency of vital organs, severe anemia and nutritional metabolic disorders that cannot be improved in the short term. (9) Eastern Cooperative Oncology Group (ECOG) performance status score > 2. (10) The lesion to be ablated has received radiotherapy within the past 6 months. (11) Presence of active hepatitis B, active hepatitis C, history of human immunodeficiency virus (HIV) infection (known positive for HIV 1/2 antibodies), or other active infections that may affect the patient's treatment as judged by the investigator. (12) Accompanied by epilepsy, history of mental illness or cognitive impairment. (13) Pregnant or lactating women, and male or female patients planning to conceive or become pregnant during the trial. (14) Participation in any other clinical trial within 3 months before signing the informed consent form (except for non-interventional studies). (15) Other circumstances considered inappropriate for participation in this clinical trial by the investigator.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: RBS group; Cryobiopsy with Unicorn robotic bronchoscopy system	Procedure: robotic bronchoscopy system; cryobiopsy with the help of RBS

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Adverse events incidence	The proportion of complications related to cryoablation (such as bleeding, pneumothorax, infection, etc.) that occurred in the subjects after cryoablation treatment.	1 month after procedure

Collaborators and Investigators

• Sponsor: Guangzhou Medical University

Publications and helpful links

General Publications

• Nakaji H, Niimi A, Matsuoka H, Iwata T, Cui S, Matsumoto H, Ito I, Oguma T, Otsuka K, Takeda T, Inoue H, Tajiri T, Nagasaki T, Kanemitsu Y, Chin K, Mishima M. Airway remodeling associated with cough hypersensitivity as a consequence of persistent cough: An experimental study. Respir Investig. 2016 Nov;54(6):419-427. doi: 10.1016/j.resinv.2016.06.005. Epub 2016 Jul 31.

Study record dates

Study Major Dates

• Study Start (Estimated): February 15, 2025
• Primary Completion (Estimated): December 31, 2025
• Study Completion (Estimated): December 31, 2025

Study Registration Dates

• First Submitted: February 12, 2025
• First Submitted That Met QC Criteria: February 12, 2025
• First Posted (Actual): March 25, 2025

Study Record Updates

• Last Update Posted (Actual): March 25, 2025
• Last Update Submitted That Met QC Criteria: February 12, 2025
• Last Verified: February 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Respiratory Tract Diseases; Lung Diseases; Respiratory Tract Neoplasms; Thoracic Neoplasms; Lung Neoplasms
• Other Study ID Numbers: RBS-cryoablation

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No