Hemoglobin Measurement Techniques in Anemia Assessment

Accurate determination of haemoglobin concentration underpins the diagnosis and management of anaemia at both individual and population levels. Traditional laboratory methods rely on venous blood samples analysed by automated haematology analysers, considered the gold standard owing to high precision and robust quality control. For settings with limited laboratory infrastructure, point-of-care devices such as portable haemoglobinometers offer rapid results from capillary blood, though they may introduce greater variability. Innovations in non-invasive spectroscopic measurement have sought to bridge accessibility gaps by estimating haemoglobin through tissue optics, eliminating the need for blood draws. Regardless of technology, preanalytical factors—including blood source, sampling technique and environmental conditions—significantly influence readings. Establishing harmonised thresholds for anaemia diagnosis further requires accounting for device-specific biases, population characteristics and practical constraints across diverse healthcare contexts.

Research from Nature Portfolio

Investigations into non-invasive spectroscopic approaches have demonstrated the potential of portable devices for community-level screening. In a recent study of nursing students in India, a cuff-free spectroscopic instrument provided haemoglobin estimates within half a gram per decilitre of laboratory analyser values for the majority of readings. The device’s low cost, ease of use and internet connectivity were highlighted as key attributes for broad deployment in resource-limited regions. Findings underscore the promise of non-invasive methods in enhancing screening coverage without compromising diagnostic precision for moderate anaemia.

Hemoglobin Measurement Techniques in Anemia Assessment publication trend

The graph below shows the total number of articles in hemoglobin measurement techniques in anemia assessment across all publications each year (not limited to Nature Index journals).

Technical terms

Haemoglobin concentration: The mass of haemoglobin per volume of blood, typically expressed in grams per decilitre, used to define anaemia status.

Automated haematology analyser: A laboratory instrument that quantifies blood cell parameters, including haemoglobin, using optical or electronic methods under standardised quality control.

Point-of-care device: A portable testing instrument designed for near-patient use, often employing capillary blood to deliver rapid haemoglobin readings outside traditional laboratories.

Capillary blood: Blood obtained from a peripheral puncture (for example, a finger or heel prick), used in many point-of-care haemoglobin measurement techniques.

Spectroscopic measurement: A non-invasive method that estimates haemoglobin by analysing light absorption or reflection through biological tissues, bypassing the need for blood samples.

References

1. Emerging Evidence and Critical Issues with the Use of Single-Drop Capillary Blood for the Measurement of Hemoglobin Concentration in Population-Level Anemia Surveys. Advances in Nutrition (2024).
2. Comparison of venous and pooled capillary hemoglobin levels for the detection of anemia among adolescent girls. Frontiers in Nutrition (2024).
3. Estimation of haemoglobin using non-invasive portable device with spectroscopic signal application. Scientific Reports (2024).
4. Diagnosing anemia: Challenges selecting methods, addressing underlying causes, and implementing actions at the public health level. Annals of the New York Academy of Sciences (2023).