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Steven
had just turned 6 months old. He had recently discovered
the freedom of being mobile and was attempting to follow
his 3 year old sister Heather up the stairs. He had almost
mastered crawling up the first step when he slipped and fell,
hitting his mouth on the linoleum floor of the kitchen. The
screaming brought his mother running who initially thought the
baby must have split his head open because of the amount of blood
that was everywhere. As she cleaned the injury, she
realized that the blood was coming from the baby's mouth.
After applying cold compresses for 15 minutes, the bleeding
eventually stopped. Five minutes later, the bleeding
started up again. She decided to call the pediatrician.
The
baby had stopped bleeding by the time the mother arrived at the
pediatrician's office. During a thorough checkup of
the baby, the pediatrician noticed bruises on the legs and arms.
He noted that the baby had not been circumcised.
Upon examination of the injured gum area, bleeding started again.
The
pediatrician asked the mother if there was any history of
bleeding disorders on the maternal side of her family. The
mother was not sure, although she thought she may have had a
great uncle who died when he was young of a blood disorder.
Instructor's
Note: Review Module 5 of the Workbook: Hemostasis
and Coagulation. Make sure to review objective 1 and
answer the following questions:
1. What 3 processes are involved
to stop bleeding?
2. What steps are required to form a platelet plug?
3. What 3 pathways are involved in coagulation?
4. What activates the extrinsic pathway?
5. What activates the intrinsic pathway?
6. What is the end result of the clotting cascade?
7. Look at the chart on page 5-9 of your workbook.
Based on the names of the clotting factors, which is deficient
in Hemophilia? Which pathway is involved?
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