Question

A 15-year-old boy with chronic strep throat has presented with excessive bruising. His coagulation results were as follows: PT 15.5 seconds (reference range 10.8 to 13.5 seconds) aPTT 42.1 seconds (reference range 28.5 to 35.5 seconds) Platelets 325 x 10^9/L (reference range 150-450 x 10^9/L) What coagulation factors are most likely attributing to the abnormal coagulation results, and why?

Name: a 15 year old boy with chronic strep throat has presented with excessive bruising his coagulation results were as follows pt 155 seconds reference range 108 to 135 seconds aptt 421 seconds r 64538
Uploaded: 2022-06-13T16:32:55-08:00
Duration: 2 min 33 s
Channel: Sri K
Description: a 15 year old boy with chronic strep throat has presented with excessive bruising his coagulation results were as follows pt 155 seconds reference range 108 to 135 seconds aptt 421 seconds r 64538

          A 15-year-old boy with chronic strep throat has presented with excessive bruising. His coagulation results were as follows:
PT 15.5 seconds (reference range 10.8 to 13.5 seconds)
aPTT 42.1 seconds (reference range 28.5 to 35.5 seconds)
Platelets 325 x 10^9/L (reference range 150-450 x 10^9/L)

What coagulation factors are most likely attributing to the abnormal coagulation results, and why?

Added by Lidia B.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Sri K

06/13/2022

Step 1

Step 1: The patient's PT (prothrombin time) is prolonged, indicating a deficiency in factor VII, which is responsible for the extrinsic pathway of coagulation. Show more…

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A 15-year-old boy with chronic strep throat has presented with excessive bruising. His coagulation results were as follows: PT 15.5 seconds (reference range 10.8 to 13.5 seconds) aPTT 42.1 seconds (reference range 28.5 to 35.5 seconds) Platelets 325 x 10^9/L (reference range 150-450 x 10^9/L) What coagulation factors are most likely attributing to the abnormal coagulation results, and why?