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European Journal of Cardio-Thoracic Surgery, Vol 6, 590-596, Copyright © 1992 by European Association for Cardio-thoracic Surgery

ARTICLES

Does ND-YAG laser extend the indications for resection of pulmonary metastases?

D Branscheid, S Krysa, G Wollkopf, H Bulzebruck, G Probst, M Horn, J Schirren and I Vogt-Moykopf
Chirurgische Abteilung, Thoraxklinik Heidelberg-Rohrbach, FRG.

Surgery forms part of a combined oncological concept in the management of pulmonary metastases. The following questions are relevant for its role: Does survival depend on the type of primary tumor? Are there any prognostic factors? What are the limits on radical resection? We analyzed retrospectively 657 patients who had undergone 759 resections of pulmonary metastases between 1973 and 1990. After conducting in vitro and in vivo experiments with the non-contact neodymium aluminum garnet (Nd-YAG) laser with a generating and delivery power of 10-120 W at the site of operation for 0.1-9.9 s, we have treated 65 patients by laser resection and/or vaporization since January 1990. Our preferred surgical approach was median or transverse thoracotomy. The 5-year survival of all resected patients was 30%, ranging from 21% (soft tissue sarcoma) to 60% (testicular carcinoma). Statistically significant differences in prognosis were seen related to the type of primary tumor, the disease-free interval, the caval or portal type of metastatic spread, the number of metastases and the potential degree of radical resection. The potential degree of conventional radical resections (wedge, anatomical sub-/segmental) was negatively influenced by the number of metastases (n > 9: 79% "radical" surgery = 38% 5-year survival). Laser treatment allowed parenchyma-preserving resection in cases of metastases of more than 0.5 cm in diameter, and vaporization in smaller ones. Resection with the intention of achieving complete remission was possible in up to 72 unilateral metastases. The complication rate was comparable to conventional resections.

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