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A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was, 'in adult patients who require a tube thoracostomy, is the trocar technique comparable to blunt dissection in terms of rate of tube malposition or complications?' Altogether more than 258 papers were found using the reported search, of which 7 represented the best evidence to answer the clinical question. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers were tabulated. The articles included two retrospective reviews, three prospective observational studies and two prospective randomized studies. Of these, four papers concluded that the trocar technique was associated with a significantly higher rate of tube malposition and complications. One retrospective review found that the rate of tube malposition was similar in both groups; however, the trocar technique was abandoned due to the occurrence of severe complications like lung and stomach injury. Another study found that blunt dissection into the pleural space followed by the use of a trocar to direct the chest tube was as safe as and even more effective than blunt dissection alone. A randomized prospective study in cadavers comparing blunt vs sharp tip trocars reported that the use of blunt tip trocars resulted in less complications. We conclude that the trocar technique for chest tube placement should be avoided in adult patients as it is associated with a higher incidence of malposition and complications. The blunt dissection technique with digital exploration of the pleural cavity prior to chest tube placement is the safest technique and should be considered standard practice.

Is the trocar technique for tube thoracostomy safe in the current era?: Table 1: