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Roller Clamp

The roller clamp is what we use to control the rate at which the IV fluid infuses. If we roll it one way, it squeezes the IV tubing more tightly, making it more narrow and therefore making the fluid flow through the tubing more slowly; if we roll it the other way, it loosens its pinching of the IV tubing, making the tubing less narrow, and allowing the IV fluid to flow through at a faster rate. So, if for example, we observe (by looking at the drip chamber and counting drops) that an IV is infusing at a rate of 50 gtt/min, but it was ordered to infuse at a rate of 30 gtt/min, we would tighten the roller clamp to slow the drip rate down until we could count only 30 drops going through the drip chamber each minute.