Clinical signs of hemorrhage, such as blood pressure of 90/70 and pulse of 118, can be seen when blood loss reaches:

In clinical practice, signs of hemorrhage, such as hypotension (indicated by a blood pressure of 90/70) and tachycardia (indicated by a pulse of 118), often emerge as the body begins to respond to significant blood loss. Specifically, the threshold for these vital sign changes typically occurs when a patient has experienced a blood loss of approximately 1200 mL.

When blood loss reaches this level, the body attempts to maintain perfusion to vital organs by activating compensatory mechanisms. As blood volume decreases, the heart rate increases to maintain cardiac output, which explains the elevated pulse. Concurrently, the loss of fluid volume can lead to a drop in blood pressure, reflecting inadequate blood flow and perfusion.

Further understanding of hemorrhagic shock stages is also useful. In the early stages, blood loss of around 15-30% of total blood volume (approximately 750 to 1500 mL in a typical adult) can often present with mild tachycardia without hypotension. Once blood loss exceeds around 30-40%, represented by a loss around 1200 mL, significant changes in vital signs are observed, including both the hypotension and tachycardia seen in the scenario