When might additional pressure be required at a puncture site to stop bleeding?

Additional pressure may be required at a puncture site to stop bleeding particularly when the patient is on an aspirin regimen. Aspirin is an antiplatelet medication that inhibits blood clotting by preventing platelets from aggregating. This can lead to prolonged bleeding after a procedure such as venipuncture or capillary puncture. Therefore, in patients taking aspirin, the application of sustained pressure on the puncture site is essential to help control bleeding and promote hemostasis effectively.

While it is true that additional pressure may be needed after a venipuncture to ensure bleeding does not continue, the specific emphasis here is on the significant effect that an aspirin regimen has on hemostasis. Other factors such as dehydration or the type of puncture may influence bleeding to some extent, but they do not intrinsicly have the same direct impact on coagulation and bleeding time as the antiplatelet effects of aspirin.