![]() ![]() The aPTT assesses the intrinsic pathway of coagulation and common pathways. The answer is B: The aPTT assess the intrinsic pathway of coagulation and common pathways. The aPTT only assesses clotting factor VII. The aPTT assesses the intrinsic pathway of coagulation and common pathways.ĭ. The aPTT is an important result used to assess the effectiveness of Warfarin.ī. Which statement is TRUE about this coagulation test?Ī. Your patient is being evaluated for a bleeding disorder. The extrinsic pathway is activated when there is outside/external injury that results in blood loss from the vascular system.Ģ. The PT/INR assesses the extrinsic pathway of coagulation (which uses clotting factor VII) and common pathways (which uses factor I, II, V, X). The answer is A: Extrinsic pathway of coagulation and common pathways. Intrinsic pathway of coagulation and common pathways Extrinsic pathway of coagulation and common pathwaysī. As the nurse you know that this blood test assesses?Ī. A patient is ordered a PT/INR blood test. Good luck.(NOTE: When you hit submit, it will refresh this same page. In that case, treat the underlying condition, if possible, while also treating the symptoms (if possible). Now, some liver conditions create a coagulopathy that can cause the coags (PT, PTT, INR) to elevate. It takes about 5 days off the Coumadin in order for the INR to return to 1. If the pt is taking Coumadin and the INR comes back 4, the dosage of Coumadin is usually decreased a little, and the test repeated, say, in a week to a month, depending on how well the anticoagulation clinic knows this particular pt and his/her patterns of response to Coumadin. In our cath lab, we usually don't cath a pt if the INR is greater than 1.5-1.7, as the risk of hemorrhage from the punctured artery is increased (let's not increase risk to the patient from doing the exam!). An INR of three means the blood takes about three times as long to clot compared with the normal value for that pt. If the pt is taking Coumadin (warfarin) to anticoagulate for a mechanical heart valve, the therapeutic INR should be around 3. ![]() An INR of 1 means the blood clots "normally" for that pt. The greater the INR, the longer it takes the blood to clot. (please note the subtle difference between "normal" and "normal range." if the lab's normal pt is 14, normal range might be 12-16).ĭoes this help? Do I need to clarify anything? ![]() If the pt's pt is 28 and the lab's normal is 14, then the inr is 2. So if the pt's pt is 14, and the lab's normal is 14, then the inr is 1. Inr is pt's pt divided by the labs normal. That "inappropriate adjustment" could have serious consequences. So if your pt sample was sent to lab x one week, where their normal is 12 sec, and to lab z the next week, where their normal is 14 sec, there might be an inappropriate adjustment in your therapy if the difference in reference ranges isn't noted. It was developed because coumadin really doesn't have a wide therapeutic range, and as i mentioned above, different labs have different normals. Inr stands for international normalized ratio. What you posted seemed about right, but I would have to look it up. These goals also vary from facility to facility, but are generally similar. Similarly, you want a higher pt/inr for mechanical heart valve patients that for someone who is receiving coumadin for a-fib. For example, you want a higher ptt if a patient is receiving heparin for a dvt or pe than if it is for cardiac reasons. Goals for pt/inr and ptts vary according to why the patient is on the anticoagulant. ![]() You are correct in that pt/inr is used to monitor coumadin therapy, and ptt is used to monitor heparin therapy. Very important to check the normal ranges for the lab that did the test ). (this, by the way, is true for most every test. Ok, you are going to get different "norms" because different labs use different machines and reagents, and have different normal ranges. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |