18. A 22-year-old man has been stabbed in the left fifth intercostal space at the edge of the sternum. Which structure is most likely to have been penetrated?

When will you upload yesterday’s session ?

Which of the following causes a left shift of the oxygen–haemoglobin dissociation curve?

A patient presents with fever, headache, neck stiffness, and photophobia. CSF analysis shows: - Increased opening pressure - Neutrophilic predominance - High protein - Low glucose What is the most likely diagnosis?