Artificial pneumothorax: a safe and simple method to relieve pain during microwave ablation of subpleural lung malignancy

Abstract

Background: Microwave ablation has been extensively used for eliminating pulmonary tumors; however, it is usually associated with severe pain under local anesthesia. Decreasing the power and shortening the ablation time can help to relieve the pain; however, this leads to incomplete ablation and an increasing recurrence rate. This research aims to employ an artificial pneumothorax to increase both the curative effect and pain relief during the ablation procedure.

Material and methods: From July 2013 to January 2015, nine patients presenting with 10 subpleural lung tumors (age: 44–78 years) with a high possibility of severe pain underwent the artificial pneumothorax during microwave ablation. The pain assessment scores and complications induced by the artificial pneumothorax were recorded and analyzed by a CT scan follow-up.

Results: The tumors of the nine patients were eliminated successfully using microwave ablation with artificial pneumothorax under local anesthesia. The pain caused by the ablation was relieved to a great extent with an average rate of 94.66% (range: 63.3%–100%) and all tumors were ablated completely. No severe complications occurred after the operation.

Conclusions: The artificial pneumothorax is a reliable therapy to improve the curative effect of microwave ablation under local anesthesia by relieving the pain of the patients.

Keywords:

• Artificial pneumothorax
• relieving pain
• microwave ablation
• lung tumor

Acknowledgements

We thank our colleagues from PLA 401 Hospital who provided insight and expertise that greatly assisted the research. We are also immensely grateful to all authors for their comments on an earlier version of the manuscript.

Disclosure statement

The authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript.