Feasibility and safety of fine positioning needle-mediated breathing control in CT-guided percutaneous puncture of small lung/liver nodules adjacent to diaphragm

Comparative Evaluation of 2 Different Percutaneous Techniques of Simultaneous Needle Biopsy With Microwave Ablation of Suspected Malignant Pulmonary Nodules

Background: To compare the safety and efficacy of 2 different computed tomography-guided puncture techniques for simultaneous needle biopsy and microwave ablation of suspected malignant pulmonary nodules. Methods: This retrospective comparative before-and-after study analyzed the data of 81 patients (each with a suspected malignant pulmonary nodule) who underwent computed tomography-guided needle biopsy with simultaneous microwave ablation between September 2016 and September 2021. In group A, 41 patients (41 pulmonary nodules) underwent microwave ablation immediately through the biopsy channel, whereas in group B, 40 patients (40 pulmonary nodules) underwent computed tomography-guided percutaneous needle biopsy and microwave ablation through separate needle channels. Clinical data, technical success rates, complications, and short-term efficacy were compared between the groups to evaluate the advantages and disadvantages of both techniques. Results: Of the 81 patients, 78 successfully underwent needle biopsy and microwave ablation, with a technical success rate of 96.3%. The incidence of pneumothorax was 56.1% (23 out of 41) and 30% (12 out of 40) in groups A and B, respectively, while that of chest pain was 34.1% (14 out of 41) and 40% (16 out of 40) in groups A and B, respectively. The differences were statistically insignificant (p = .127 and p = .759). However, the incidence of hemoptysis was 39.0% (16 out of 41) and 17.5% (7 out of 40), respectively, which was statistically significant (P = .015). Air embolism, bronchopleural fistula, and needle implantation metastasis were not observed in both groups. At a 6-month follow-up, there were no other complications in both groups, and complete ablation was observed in all cases. Conclusion: Computed tomography-guided biopsy combined with microwave ablation is safe and effective for the treatment of suspected malignant pulmonary nodules, and clinicians can use both techniques.

Efficacy and safety of computed tomography-guided microwave ablation with fine needle-assisted puncture positioning technique for hepatocellular carcinoma

BACKGROUND

In microwave ablation (MWA), although computed tomography (CT) scanning can overcome gas interference, it cannot achieve real-time localization. Therefore, the puncture technique is more important in CT-guided ablation.

AIM

To compare the fine needle-assisted puncture (FNP) positioning technique and the conventional puncture (CP) technique for the safety and efficacy of CT-guided MWA in treating hepatocellular carcinoma (HCC).

METHODS

This retrospective study included 124 patients with 166 tumor nodules from February 2018 and June 2021. Seventy patients received CT-guided MWA under the FNP technique (FNP group), and 54 patients received MWA under the CP technique (CP group). Intergroup comparisons were made regarding local tumor progression (LTP), recurrence-free survival (RFS), overall survival (OS), and complications. The influencing variables of LTP and RFS were analyzed through univariate and multivariate regressions.

RESULTS

The 1-, 2-, and 3-year cumulative incidences of LTP in the FNP group were significantly lower than those in the CP group (7.4%, 12.7%, 21.3% vs 13.7%, 32.9%, 36.4%; P = 0.038). The 1-, 2-, and 3-year RFS rates in the FNP group were significantly higher than those in the CP group (80.6%, 73.3%, 64.0% vs 83.3%, 39.4%, and 32.5%, respectively; P = 0.008). The FNP technique independently predicted LTP and RFS. Minor complications in the FNP group were lower than those in the CP group (P < 0.001). The difference in median OS was insignificant between the FNP and CP groups (P = 0.229).

CONCLUSION

The FNP technique used in CT-guided MWA may improve outcomes in terms of LTP, RFS, and procedure-related complications for HCC.

Efficacy and Safety Analysis of Multislice Spiral CT-Guided Transthoracic Lung Biopsy in the Diagnosis of Pulmonary Nodules of Different Sizes

Objective

This study is aimed at investigating the efficacy and safety of multislice spiral CT-guided transthoracic lung biopsy in the diagnosis of pulmonary nodules of different sizes.

Methods

Data of 78 patients with pulmonary nodules who underwent CT-guided transthoracic lung biopsy in our hospital from January 2020 to December 2021 were retrospectively analyzed, and they were divided into the small nodules group (n = 12), medium nodules group (n = 35), and large nodules group (n = 31) according to the diameter of pulmonary nodules. The results of puncture biopsy and final diagnosis of pulmonary nodules of different sizes were compared. The incidence of complications in patients with pulmonary nodules of different sizes was compared. Univariate analysis was used to compare the incidence of complications in 78 patients. Logistic multiple regression analysis was used to analyze the independent risk factors of pneumothorax in patients with pulmonary nodule puncture. Logistic multiple regression analysis was used to analyze the independent risk factors of pulmonary hemorrhage in patients with pulmonary nodule puncture.

Results

The diagnostic accuracy, sensitivity, and specificity were 83.33%, 100.00%, and 77.78% in small nodules group. The diagnostic accuracy, sensitivity, and specificity of medium nodules group were 85.71%, 100.00%, and 73.68%, respectively. The diagnostic accuracy, sensitivity, and specificity of large nodules group were 93.55%, 100.00%, and 33.33%, respectively. There was no significant difference in the incidence of pneumothorax among the three groups (P > 0.05). The incidence of pulmonary hemorrhage in small nodule group was higher than that in the medium nodule group and large nodule group, and the difference was statistically significant (P < 0.05). There was no significant difference in the incidence of total complications among the three groups (P > 0.05). There were statistically significant differences in clinical data such as the needle tract length, the puncture position, and the distance of the puncture needle passing through the lung tissue in patients with or without pneumothorax (P < 0.05). There were statistically significant differences in needle tract length, distance of puncture needle passing through lung tissue, and size of pulmonary nodules in patients with or without pulmonary hemorrhage (P > 0.05). Logistic multivariate analysis showed that needle tract length ≤ 50 mm, lateral decubitus position, and the distance of puncture needle passing through lung tissue ≥ 14 mm were independent risk factors for pneumothorax after puncture in patients with pulmonary nodules (P < 0.05). The needle tract length > 50 mm, the distance of puncture needle passing through lung tissue ≥ 14 mm, and small nodules (pulmonary nodules diameter ≤ 10 mm) were independent risk factors for pulmonary hemorrhage after puncture in patients with pulmonary nodules (P < 0.05).

Conclusion

Multislice spiral CT-guided transthoracic lung biopsy is effective in diagnosing pulmonary nodules of different sizes.