Doctors Lounge - Infections Answers
provided on www.doctorslounge.com is designed to support, not
replace, the relationship that exists between a patient/site
visitor and his/her physician."
Back to Infections Answers List
- Mon Sep 10, 2007 12:41 am
My mom, 73, was admitted to the hospital today. They withdrew two vials of fluid from a swollen knee. It was yellow. They said it tested for a white cell count of 36000. What does that mean?
She has had an unknown cellulitus/infection --redness, swelling, painful to touch--in her foot-same leg as knee issue on and off for the last 5 weeks. Two hospital admits. Several intraveinous antibiotics and pills. No cuts or sore.
Her knee started hurting badly this week after she was discharged from the hospital. She couldn't walk at all and was in much pain. They admitted her early this morning. Now they are talking about surgery on her knee. What does the 36000 WBC count possibly represent? I understand infection, but how, from where? There were no cuts on her foot.
| Dr. Chan Lowe
- Mon Sep 10, 2007 8:09 pm
If I am understanding correctly, the WBC of 36,000 was from the fluid in the knee. Is this correct? White blood cells in the knee fluid indicate infection within the knee joint, a condition called septic arthritis. This condition often needs to have the knee joint opened and washed out by the surgeons. This will help wash out a lot of the bacterial load and allow the antibiotics to work much better and faster. It also minimizes damage to the knee joint from the bacteria.
If the WBC count was from her blood it still would be an indicator of infection or significant inflammation. Given that there was fluid in the knee, the washout may still be needed.
These infections often come from bacteria traveling in the blood that gets to the joint and sets up infection. It may have initially started as a cellulitis of the foot and traveled up to the knee. This is a known possibility (though not particularly common) with a cellulitis of the lower leg.
Antibiotics and drainage should bring the infection under control. As to what caused the initial infection it is hard to say. There may have been a small amount of trauma to the foot that wasn't even noticed, allowing the bacteria from the skin to get in and cause infection.