APTT

– Only venous blood is allowed for testing.
– Blood is donated on an empty stomach, after an overnight fast, in the morning.
– Before blood sampling, it is forbidden to drink: tea, coffee, juice, or carbonated drinks.
– 1-2 hours before the blood sampling procedure, you are allowed to drink about 250-300 ml of clean water
– Avoid drinking alcohol and overeating the day before donating blood.
– Exclude fatty, spicy and smoked foods for a day.
– Avoid physical and emotional excitement. Therefore, before the procedure, you should rest for 10-15 minutes to calm down.
– Patients taking hormonal drugs should not violate the dosing schedule on the day of delivery.
– It is advisable to retake the PTI test at the same time.

APTT Blood coagulation function test

Blood clotting function is one of the most important for maintaining the life of the body. It allows you to stop bleeding, which may occur due to injuries, disorders of the vascular system or other causes. One of the methods for determining blood clotting function is the analysis of APTT (activated partial thromboplastin time). This test is important for diagnosing various diseases and monitoring the effectiveness of anticoagulant therapy.

The APTT is one of the main methods for assessing the intrinsic pathway of blood clotting. This pathway is activated when blood flows outside the blood vessels and comes into contact with the subcutaneous tissue. This can occur during trauma or in the presence of pathological processes in the vessels. As a result of activation of the intrinsic pathway, thrombin is formed, which affects the conversion of fibrinogen to fibrin. Fibrin forms a network that maintains the shape of the blood and stops bleeding.

The APTT measures the time it takes for a fibrin clot to form in a blood sample. This time is determined using a special analyzer. The result is usually expressed in seconds. Normal values for the APTT depend on the laboratory and the method, but they usually range from 25 to 35 seconds.

A prolonged APTT can be a sign of various diseases or conditions. For example, hemophilia is a genetic disorder that results in insufficient function of blood clotting factors and is accompanied by a significant increase in the duration of the APTT. It can also be associated with the use of anticoagulants, such as heparin, or other drugs aimed at thinning the blood.

A decrease in the duration of the APTT can be an indicator of hypercoagulability, where the blood clots too quickly. This can be caused by a variety of conditions, including thrombosis, some liver or kidney diseases, and certain genetic disorders.

APTT is an important element of diagnosis and monitoring of treatment of patients with various diseases of the vascular system and blood coagulation. It helps doctors to detect violations of this process in time and choose the optimal treatment strategy. It is also used before surgical interventions to assess the risk of bleeding and monitor the effectiveness of anticoagulant therapy.

To a large extent, APTT helps maintain a balance between blood clotting and blood thinning to ensure normal blood circulation and prevent unwanted blood clots or bleeding. Therefore, the study of blood clotting functions, including APTT methods, is an important direction in modern medicine.