URL of this page: //medlineplus.gov/ency/article/000713.htm. A subdural hematoma is a collection of blood between the covering of the brain (dura) and the surface of the brain. A subdural hematoma is usually the result of a serious head injury. When it occurs this way, it is called an acute subdural hematoma. Acute subdural hematomas are among the deadliest of all head injuries. The bleeding fills the brain area very rapidly, compressing brain tissue.
Mitering Inside Corners. 1  1. Measure the angle of the corner. 2  2. Set a compound miter saw with the correct angles. 3  3. Cut the right inside corner.  4. Set the miter saw angle 1  again. 5. Cut the left inside corner.  6. Fit the two pieces together before nailing them in place.
5. Cut the corner to a 45-degree angle using a drywall keyhole saw. Grasp the handle with one hand, and with the other hand grasp the sharp tip of the saw. Hold the saw horizontal to the floor, and pull downward while cutting about 1/2 inch of the corner away.. Cut into the corner with a hack saw at the mark. Hold the hack saw parallel to the floor as you cut into the corner. You must cut through the existing metal corner bead completely.