Final answer:
Hemoximetry can measure various parameters of hemoglobin, but it does not typically measure hematocrit levels. The correct answer to the question of which cannot be obtained from Hemoximetry is 'd- Ht' or hematocrit, which requires a different measurement method involving centrifugation.
Step-by-step explanation:
Hemoximetry and Hemoglobin Derivatives
Hemoximetry is a method used to measure various parameters of hemoglobin in the blood, including derivatives of normal hemoglobin, which arise due to metabolic changes in the red blood cells (RBCs).
Carboxyhemoglobin is a derivative formed when hemoglobin binds with carbon monoxide (CO) rather than oxygen (O₂), which has an affinity for hemoglobin about 200 times more than oxygen. This can lead to tissue hypoxia, as the oxygen-carrying capacity is drastically reduced when hemoglobin binds more readily to CO. City dwellers often have a measurable percent of carboxyhemoglobin in their blood due to pollution exposure.
The question at hand is: which of the following can not be obtained from Hemoximetry?
- Amount of Hb (hemoglobin)
- HbO₂ (oxyhemoglobin)
- HCO (this option seems incomplete and could be a typo or an abbreviation error)
- Hematocrit (Ht) (the volume percentage of erythrocytes in a sample of centrifuged blood)
While hemoximetry can measure the amount of hemoglobin, oxyhemoglobin levels, and carboxyhemoglobin levels, it does not normally measure hematocrit levels. Hematocrit is determined by a different process, typically centrifugation, which separates the red blood cells from the plasma, allowing measurement of the packed cell volume.
Conclusion
The correct answer is hematocrit (d), as all the other components listed (a-c) are directly related to hemoglobin and can be measured via hemoximetry.