Is hemoglobin test significant to determine iron deficiency in a patient?

No. Hemoglobin level determines if u r anemic. However, simplified, the size of red blood cells (rbc) can be small and mean iron deficiency, or large and mean Folic Acid or B12 deficiency. Causes of iron deficiency is loss of blood (iron molecule is in the rbc), without there being a store of iron in the body for the bone marrow to make more of them. Must be treated. Call doc.
Yes. Low hemoglobin, or anemia, is often one of the first indications that someone may be iron deficient.

Related Questions

I have average hemoglobin levels. Will the iron deficiency keep me from donating blood?

? It would be unlikely for a person to have a normal hemoglobin level if they are iron deficient. If iron levels are mildy depressed but hemoglobin levels are within normal ranges, the blood bank would likely still accept your donation.

If you have normal RBC and Hemoglobin does that definitely mean that your oxygen supply is enough At The Moment even though you have Iron deficiency?

Usually not related. If a person has a normal amount of hemoglobin, regardless of how many red blood cells he has, the amount of oxygen supplied to the various parts of his body is related to other factors (not directly related to his normal amount of hemoglobin). Other factors include the amount of oxygen in the air, the quality of oxygen transfer in his lungs, the amount of blood pumped per heart contraction, etc...
No. You're misled on two different points. Both are subtle. First, iron deficiency will make you feel unwell before you become anemic by depleting iron in muscle cells, mitochondria etc. Second, the amount of oxygen in your blood also depends on adequacy of lung function and availability of oxygen. If your labs show iron deficiency and you're a non-vegetarian man, a serious blood-loss workup's needed.

Why do some people have normal hemoglobin levels but iron deficiency?

Low levels precede. Hemoglobin level does not decrease unless all the iron stores are used up. So one follows the other but slowly. Therefore, it is not uncommon to have good hemoglobin level in th eearly phases of iron deficiency.

Low hemoglobin (11.6), low mch, high rdw, low alkaline phosphates, all other values normal including rbc and b12. Possible cause? Iron deficiency?

May be. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, iron deficiency is not uncommon in women in their reproductive years. It would be safe to take oral iron and multivitamin supplements and recheck hemoglobin at your next visit to your doctor. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.

Dr thinks I'm on verge of iron deficiency anemia. Ferritin is only low #.hemoglobin is fine. Platelet is 600. Is high platelet related to pre-anemia?

Anemia. Elevated plata, eats may be due to recent bleeding from your period. Starting iron supplement is a good idea in a young person to compensate for blood loss due to heavy menstrual loss.

Tested very low iron, 1/3 the bottom of normal range but hemaglobin, hematocrit&Transferrin are fine. Non-Anemic iron deficiency... symptoms, worrries?

Why low iron? Iron deficiency in an adult male needs to be investigated to find the cause. It may be poor nutrition or loss of blood, usually in the intestine. Please discuss the issue with your doctor to ascertain the cause.