How much pressure is generally needed to stop bleeding in the upper extremity?

To effectively control bleeding in the upper extremity, applying direct pressure is essential. The typical pressure required to occlude arterial blood flow and stop bleeding in this area is around 250 mmHg. This pressure ensures that the blood vessels supplying the injured area are compressed adequately to halt bleeding.

Applying this level of pressure is based on understanding the anatomy of the upper extremities, where major arteries like the brachial and radial arteries play a significant role in bleeding control. The pressure must be sufficient to overcome the arterial pressure in these vessels, which can vary but is often in the range that would require application of around 250 mmHg to be effective.

The ranges suggested by the other choices do not typically provide adequate pressure to achieve hemostasis effectively, which is why 250 mmHg is considered the standard for managing bleeding in this region.