Describe the relevant anatomy for insertion of an intercostal catheter. (60% of marks) How does breathing 100% oxygen help in the resolution of a pneumothorax? (40% of marks)
Many candidates described the technique for insertion of an intercostal catheter which was
not requested. Few identified the nerve supply to the area. Most identified the “safe”
triangle but failed to correctly identify its borders or draw a diagram to show anatomic
landmarks. Describing the anatomy from skin to lungs, including the neurovascular bundle,
was needed to pass this part of the question.
Although most knew that 100% oxygen reduce the nitrogen content in a pneumothorax and
this accelerates its adsorption, but did not go on to provide any quantification of partial
pressure changes in blood and in the pneumothorax bubble