Stacey fell down and hurt her knee two days ago. Today she is at the orthopedic surgeon’s office w

Stacey fell down and hurt her knee two days ago. Today she is at the orthopedic surgeon’s office with her knee tender and extremely swollen. The physician tells Stacey that she needs to have the fluid drained from her knee and have an injection to reduce the inflammation. The fluid he drains is watery and bloody.
   1.  What is the normal fluid in the knee joint?
2.  What is the clinical term for the bloody fluid the physician drained?
3.  How did this fluid form?
4.  Which signs of inflammation is Stacey clearly showing?
5.  When the physician gives the “injection to reduce the inflammation,” what is likely in the injection?
6.  If the surgeon prescribes a nonselective COX inhibitor for the pain, how does it work?
7.  How is a selective COX-2 inhibitor different from a nonselective COX inhibitor?