LOW WHITE BLOOD CELL COUNT 低白细胞计数

20th Dec 我再次去检验血回来，报告上说明我的白血球过低。本来普通人的白血球的数量应该为5-10。我却只有1.9。为何这样少？我只好上网检查低白细胞计数的原因和导致。以下所有解释来自Chemocare.com (http://www.chemocare.com/managing/low_blood_counts.asp).

LOW WHITE BLOOD CELL COUNT (low WBC)

Leukopenia -A decrease in the total number of white blood cells, which may lead to low white blood cell count.

Neutropenia - A decrease in the number of neutrophils, which may lead to low white blood count.

Granulocytopenia -  Some people use this term in place of Neutropenia.

White blood cells fight infection. The white blood count (WBC) is part of a complete blood count (CBC) that is used to check your blood counts. There are several types of white blood cells. A differential test will show more detail about your white blood cell count:Normal Adult Values

White Blood Cell Total 4-11 k/ul
Lymphocytes 22-44%
Monocytes 0-7%
Granulocytes
Neutrophils 40-70%
Eosinophils 0-4%
Basophils 0-1%


Note: Normal values will vary from laboratory to laboratory.


When you have a low white blood cell count there is an increased risk of infection. The level of risk depends on several factors:
How low your white blood count falls
How long your white blood count is low
Which type of low white blood cell count you have
Other medications you may be taking such as steroids or immunosuppressive agents (cyclosporin).

One measure of risk is the absolute neutrophil count (ANC). The ANC is calculated by multiplying the total white blood count by the percent of neutrophils (also called segmented neutrophils, segs, polymorphoneucleated cells or PMNs, polys)

Total white blood count x % neutrophils* = ANC

* Neutrophils may be reported as segs & bands (a band is slightly less mature form of a seg). In this case add the % of segs to the % of bands then multiply by the total number of white blood cells.

(% segs + % bands) x Total white blood count = ANC
Risk of Infection based on Absolute Neutrophil Count (ANC)

ANC greater than 1500 No increased risk of infection
ANC 1000-1500 Slight increase in risk of infection
ANC 500-1000 Moderate increase in risk of infection
ANC 100-500 High risk of infection
ANC less than 100 Extremely high risk of infection


Things you can do to reduce your risk of infection when you have low white blood count:
Frequent hand washing of both you and those coming in contact with you.
Avoid contact with anyone who is sick. If someone in the home is sick limit contact and consult your doctor or nurse.
Do not have dental work done while your white blood cell count is low.

When your white blood cell count is low you may NOT have the usual signs and symptoms when developing an infection such as:
Redness
Swelling
Pus formation (at the site of an injury or incision)
Cough
Sputum
Nasal drainage (from a sinus or respiratory infection)

Therefore, it is extremely important to be alert to any change in how you feel and report and discuss what you are feeling with your doctor or nurse.

When to call your doctor or health care provider about low blood count:

Call immediately if you have:
A temperature greater than or equal to 100.5°F. (Check with your health care provider, you may be instructed to call for temperature greater than or equal to 100°F)
Chills (rigors) or shakes
Sudden onset of a new unexplained pain.

Call within 24 hours if you experience the following:
Sore throat
Sores in your mouth
A white coating in your mouth, especially your tongue
Signs of a bladder infection
Burning with urination
Blood in your urine
Needing to urinate more frequently than normal
Having to urinate in hurry and possibly not making it to the bathroom in time.