The initial stages of blood coagulation

Acoustic determination of early stages of intravascular blood coagulation.

The blood coagulation system (BCS) is a complex biological system playing a principal role in the maintenance of haemostasis. Insufficient activity of the BCS may lead to bleeding and blood loss (e.g. in the case of haemophilia). On the other hand, excessive activity may cause intravascular blood coagulation, thromboses and embolization. Most of the methods currently used for BCS monitoring suf...

The effect of heparin on the early stages of blood coagulation.

From experiments reported it is concluded that heparin combines with and inactivates Christman factor (C.F.) to form reversibly a heparin-C.F. complex. Apart from the effect of heparin on C.F. and on thrombin, heparin in moderate concentrations was not shown to inactivate any other coagulation factors."Available" heparin is defined as heparin in such a state that it can delay some clotting syst...

The initial stages of first language acquisition

Blood Coagulation

INTRODUCTION This section covers the means, as far as we now know them, by which components of the blood plasma produce an insoluble protein meshwork, or gel, at a site of blood-vessel damage. The plasma is normally completely fluid, containing all its proteins in soluble form. When the clotting system is activated at a site of blood-vessel damage, a series of proteolytic reactions is set going...

Disorders of the blood coagulation-fibrinolytic system

Most human cells have no direct contact with the external environment and their living conditions are ensured by blood. An essential criterion for normal blood circulation is the ability of the blood to arrest bleeding at sites of tissue injury and to prevent thrombus formation inside the blood vessels under normal conditions. The balance between these two extreme states is rigorously controlle...