Which of the following would not be a reasonable use for burr holes? 

• A. Taking a biopsy of brain matter.  
• B. Implementation of a medical device such as a shunt. 
• C. Removal of a solid clot.  
• D. Treatment of hydrocephalus. 

Answer: (C)

Verified step by step guidance

1. Step 1: Understand what a burr hole is — it is a small hole drilled into the skull to access the brain for various medical procedures.
2. Step 2: Identify common uses of burr holes, such as taking a biopsy of brain tissue, implanting medical devices like shunts, and treating conditions like hydrocephalus by allowing fluid drainage.
3. Step 3: Recognize that burr holes are typically used for accessing soft tissue or fluid spaces rather than removing large solid masses.
4. Step 4: Analyze why removal of a solid clot would not be reasonable through a burr hole, as solid clots usually require a larger opening or craniotomy for effective removal.
5. Step 5: Conclude that among the options, removal of a solid clot is not a typical or reasonable use for burr holes compared to the other listed procedures.