Radiological review of intercostal artery: Anatomical considerations when performing procedures via intercostal space.

INTRODUCTION: The aim of this study was to closely examine the course of the intercostal arteries within the intercostal spaces particularly with regard to where the arteries were located in relation to their adjacent ribs. The degree of tortuosity of the arteries was also examined, along with anatomical differences in different age groups. METHODS: A total of 81 patients between the age of 30 and 90 years who had underwent a CT examination of the chest for any indication were included in the study. All studies were performed on a dual source 64 slice CT (Siemens Definition Erlangen Germany). Analysis of the intercostal arteries was performed on a CT workstation using volume rendered 3D reconstructions F, or each patient the 10'n intercostals pacesb ilaterally were examined for the course and tortuosity of the intercostal arteries. RESULTS: The ICA is located relatively inferiorly in the intercostal space at costovertebral junction and it gradually becomes more superiorly positioned within the intercostal space it as courses laterally. This finding was consistent in all age groups. In addition, analysis of the data demonstrated increasing intercostal artery tortuosity with advancing age. CONCLUSION: In this study we have examined the course of the posterior intercostal arteries using MDCT. This study confirms the classical description of the course of ICA. We have shown that in the medial chest, posteriorly, the artery is located in the inferior half of the intercostal space. As it moves away from the costovertebral junction it travels closer to the inferior border of the rib above and reaches the intercostal groove. We have also shown that the artery tends to be more tortuous in elderly patients, decreasing the area of "safe" space for interventions. Both of these findings are relevant to radiologists and non-radiologists performing interventional procedures via the intercostal space.