Prothrombin Time | 合法醫療器材資訊網

2019年11月21日—Thereferencerangefortheinternationalnormalizedratio(INR)is0.8-1.1.Possiblecriticalvaluesareasfollows:20seconds.INR:> ...

A basic understanding of the coagulation pathway is required to interpret prothrombin time result (see the image below). The prothrombin time is a measure of the integrity of the extrinsic and final common pathways of the coagulation cascade. This consists of tissue factor and factors VII, II (prothrombin), V, X, and fibrinogen. The test is performed by adding calcium and thromboplastin, an activator of the extrinsic pathway, to the blood sample then measuring the time (in seconds) required for fibrin clot formation. [4]

Prothrombin time chart.

In general, the prothrombin time is more sensitive to factor VII deficiency than factor deficiencies within the final common pathway. [5]

The prothrombin time has significant interlaboratory variability influenced by the instrument, and more importantly, the reagent used. In an effort to offset variation...

Prothrombin time test | 合法醫療器材資訊網

Prothrombin Time and INR | 合法醫療器材資訊網

2018年1月18日 — What are normal results for a PT test? ... Prothrombin time test results are given in a measurement called an INR (international normalized ratio). Read More

Prothrombin Time and International Normalized Ratio (PTINR ... | 合法醫療器材資訊網

2019年2月20日 — This normal range represents an average value of healthy people who live in that area and will vary somewhat from lab to lab. Someone who is ... Read More

A Guide to INR Levels | 合法醫療器材資訊網

2020年11月24日 — A typical INR target ranges from 2-3 but can vary from patient to patient. Patients with a tendency towards clotting may have a range targeting 3-4, ... Read More

International Normalized Ratio (INR) | 合法醫療器材資訊網

由 S Shikdar 著作 · 2020 · 被引用 13 次 — The reference values for INR take into account in PT measurement in device related variations, type of reagents used, ... Read More

Prothrombin Time | 合法醫療器材資訊網

2019年11月21日 — The reference range for the international normalized ratio (INR) is 0.8-1.1. Possible critical values are as follows : 20 seconds. INR: > ... Read More

Prothrombin time | 合法醫療器材資訊網

The normal range for a healthy person not using warfarin is 0.8–1.2, and for people on warfarin therapy an INR of 2.0–3.0 is usually targeted, although the target ... Read More

INR Test | 合法醫療器材資訊網

2018年12月13日 — A result of 1.0, up to 1.5, is therefore normal. A low INR result means your blood is 'not thin enough' or coagulates too easily and puts you at risk ... Read More

Prothrombin time (PT) | 合法醫療器材資訊網

2019年1月29日 — What Abnormal Results Mean · Depending on why you are taking the blood thinner, the desired level may be different. · Even when your INR stays ... Read More

What Do Your PT | 合法醫療器材資訊網

Normal Values — Normal Values for Coagulation Tests. There is a normal range of values in coagulation studies for people who are not taking blood ... Read More

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