Step II LDH reference values in UW

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indsha008

Full Member
10+ Year Member
Hello all,

I was going through pleural effusion questions on UW and realized that normal serum LDH range in UW is given as 45-90 U/L. Every other reference (webmd, medscape, etc) show range around 140-280 U/L. One of the Light's criteria for exudative effusion (pleural fluid LDH > 2/3rd of upper limit of normal for serum LDH) is dependant on this!!

Please shed light on which range is more correct.
Thanks.
 
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well to add to the suffering

Maxwell says: LDH 90-190 U/L
Merck: 60-160 U/L

Lesson I learned from this exercise. Just use whatever reference the institution you are in gives you. In this case UW will give you the values that they use in questions and hopefully the actual exam uses the same scale,
 
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