activated partial thromboplastin time

time

[tīm] a measure of duration. See under adjectives for specific times, such as bleeding time.activated partial thromboplastin time (APTT, aPTT) the period required for clot formation in recalcified plasma" >blood plasma after contact activation and the addition of platelet substitutes such as brain cephalins or similar phospholipids; used to assess the pathways" >coagulation pathways. A prolonged aPTT can indicate a deficiency of any of various coagulation factors, including factors XII, XI, IX, VIII, X, V, and II, and fibrinogen.AEC minimal response time the shortest duration at which x-ray exposure can be terminated by automatic exposure control.atrioventricular sequential time a fixed nonprogrammable interval that extends from the atrial stimulus to the ventricular stimulus.bleeding time the time required for a standardized wound to stop bleeding; used as a test for platelet disorders; see also bleeding time.circulation time the time required for blood to flow between two given points; see also circulation time.clotting time (coagulation time) the time required for blood to clot in a glass tube; see also clotting.cold ischemia time the time between the placement of a traumatically amputated body part in ice and the time of surgical replantation.inertia time the time required to overcome the inertia of a muscle after reception of a stimulus.ischemia time the total time between traumatic amputation of a limb or portion of a limb and its surgical reimplantation; it is the sum of warm and cold ischemia times.minimal response time in radiology, the shortest possible exposure time for an x-ray film to be exposed automatically.one-stage prothrombin time prothrombin time" >prothrombin time.prothrombin time see prothrombin time.real time a term used to describe a recording device that shows events simultaneously to their occurrence.R peak time intrinsicoid deflection.thrombin time the time required for plasma fibrinogen to form thrombin; see also thrombin time.warm ischemia time the time interval between traumatic amputation of a limb or part and its placement on ice.

ac·ti·vat·ed par·tial throm·bo·plas·tin time (aPTT),

the time needed for plasma to form a fibrin clot after the addition of calcium and a phospholipid reagent; used to evaluate the intrinsic clotting system.

activated partial thromboplastin time

A test that evaluates the clotting factors of the intrinsic pathway—except VII and XIII—by measuring the time required to form a fibrin clot. aPTT is used to screen for bleeding tendencies and to monitor heparin therapy; it is increased in coagulation factor deficiencies (factors V, VIII, IX, X, XI, XII), DIC, Hodgkin lymphoma, hypofibrinogenemia, leukaemia, cirrhosis, vitamin K deficiency, von Willebrand’s disease, and in drug therapy—e.g., heparin and aspirin.

Ref range
30–40 seconds.

activated partial thromboplastin time

aPTT Hematology A test that evaluates the clotting factors of the intrinsic pathway–except VII and XIII, by measuring the time required to form a fibrin clot; aPTT is used to screen for bleeding tendencies and to monitor heparin therapy; it is ↑ in coagulation factor deficiencies–factors V, VIII, IX, X, XI, XII, DIC, Hodgkin's disease, hypofibrinogenemia, leukemia, cirrhosis, vitamin K deficiency, von Willebrand's disease, and in drug therapy–eg, heparin and aspirin Ref range 30-40 secs. See Prothrombin time.

ac·ti·vat·ed par·tial throm·bo·plas·tin time

(aPTT) (ak'ti-vā-tĕd pahr'shăl throm-bō-plas'tin tīm) The time needed for plasma to form a fibrin clot following the addition of calcium and a phospholipid reagent; used to evaluate the intrinsic clotting system.

activated partial thromboplastin time

A measurement of the time taken for the clotting system of the blood to produce the clot protein known as fibrin. The time is generally 25 to 39 seconds. This measurement is a general test of the system and is also used to assess the effectiveness of the anticoagulant drug HEPARIN. It may also be used as the basis of a test for ACTIVATED PROTEIN C RESISTANCE.

Activated partial thromboplastin time

Partial thromboplastin time test that uses activators to shorten the clotting time, making it more useful for heparin monitoring.Mentioned in: Partial Thromboplastin Time

单词	activated partial thromboplastin time
释义	DictionarySeethromboplastinEncyclopediaSeetime activated partial thromboplastin time time [tīm] a measure of duration. See under adjectives for specific times, such as bleeding time.activated partial thromboplastin time (APTT, aPTT) the period required for clot formation in recalcified plasma" >blood plasma after contact activation and the addition of platelet substitutes such as brain cephalins or similar phospholipids; used to assess the pathways" >coagulation pathways. A prolonged aPTT can indicate a deficiency of any of various coagulation factors, including factors XII, XI, IX, VIII, X, V, and II, and fibrinogen.AEC minimal response time the shortest duration at which x-ray exposure can be terminated by automatic exposure control.atrioventricular sequential time a fixed nonprogrammable interval that extends from the atrial stimulus to the ventricular stimulus.bleeding time the time required for a standardized wound to stop bleeding; used as a test for platelet disorders; see also bleeding time.circulation time the time required for blood to flow between two given points; see also circulation time.clotting time (coagulation time) the time required for blood to clot in a glass tube; see also clotting.cold ischemia time the time between the placement of a traumatically amputated body part in ice and the time of surgical replantation.inertia time the time required to overcome the inertia of a muscle after reception of a stimulus.ischemia time the total time between traumatic amputation of a limb or portion of a limb and its surgical reimplantation; it is the sum of warm and cold ischemia times.minimal response time in radiology, the shortest possible exposure time for an x-ray film to be exposed automatically.one-stage prothrombin time prothrombin time" >prothrombin time.prothrombin time see prothrombin time.real time a term used to describe a recording device that shows events simultaneously to their occurrence.R peak time intrinsicoid deflection.thrombin time the time required for plasma fibrinogen to form thrombin; see also thrombin time.warm ischemia time the time interval between traumatic amputation of a limb or part and its placement on ice. ac·ti·vat·ed par·tial throm·bo·plas·tin time (aPTT), the time needed for plasma to form a fibrin clot after the addition of calcium and a phospholipid reagent; used to evaluate the intrinsic clotting system. activated partial thromboplastin time A test that evaluates the clotting factors of the intrinsic pathway—except VII and XIII—by measuring the time required to form a fibrin clot. aPTT is used to screen for bleeding tendencies and to monitor heparin therapy; it is increased in coagulation factor deficiencies (factors V, VIII, IX, X, XI, XII), DIC, Hodgkin lymphoma, hypofibrinogenemia, leukaemia, cirrhosis, vitamin K deficiency, von Willebrand’s disease, and in drug therapy—e.g., heparin and aspirin. Ref range 30–40 seconds. activated partial thromboplastin time aPTT Hematology A test that evaluates the clotting factors of the intrinsic pathway–except VII and XIII, by measuring the time required to form a fibrin clot; aPTT is used to screen for bleeding tendencies and to monitor heparin therapy; it is ↑ in coagulation factor deficiencies–factors V, VIII, IX, X, XI, XII, DIC, Hodgkin's disease, hypofibrinogenemia, leukemia, cirrhosis, vitamin K deficiency, von Willebrand's disease, and in drug therapy–eg, heparin and aspirin Ref range 30-40 secs. See Prothrombin time. ac·ti·vat·ed par·tial throm·bo·plas·tin time (aPTT) (ak'ti-vā-tĕd pahr'shăl throm-bō-plas'tin tīm) The time needed for plasma to form a fibrin clot following the addition of calcium and a phospholipid reagent; used to evaluate the intrinsic clotting system. activated partial thromboplastin time A measurement of the time taken for the clotting system of the blood to produce the clot protein known as fibrin. The time is generally 25 to 39 seconds. This measurement is a general test of the system and is also used to assess the effectiveness of the anticoagulant drug HEPARIN. It may also be used as the basis of a test for ACTIVATED PROTEIN C RESISTANCE. Activated partial thromboplastin time Partial thromboplastin time test that uses activators to shorten the clotting time, making it more useful for heparin monitoring.Mentioned in: Partial Thromboplastin Time LegalSeeTimeSee APPT See APTT
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