Related Experiment Video
Updated: Aug 19, 2025
07:24
A Precision Medicine Tool for Measurement and Monitoring of Hemoglobin S in Sickle Cell Disease Patients Receiving Transfusion Therapy
1.8K
Blood draw site and analytic device influence hemoglobin measurements
David W Killilea1, Frans A Kuypers2, Sandra K Larkin2
1Office of Research, University of California San Francisco, San Francisco, California, United States of America.
Plos One
|November 30, 2022
Summary
Anemia testing accuracy varies. Capillary blood and point-of-care devices yield higher hemoglobin (Hb) results than venous blood and lab analyzers, potentially misclassifying anemia. Consistency in Hb measurement methods is crucial.
Area of Science:
- Hematology
- Clinical Diagnostics
- Public Health
Background:
- Anemia is a global health issue, with prevalence estimated by hemoglobin (Hb) levels.
- Standardization of Hb measurement procedures is lacking, leading to potential discrepancies.
- Previous studies struggled to isolate the impact of specific variables on Hb measurements.
Purpose of the Study:
- To investigate the impact of blood draw site (capillary vs. venous) and analytical device on Hb measurements.
- To quantify the discrepancies introduced by different measurement methods under controlled conditions.
- To inform best practices for consistent and accurate anemia diagnosis.
Main Methods:
- A controlled protocol was used with sixty healthy adults.
- Sequential capillary and venous blood samples were collected from each participant.
- Hb levels were measured using an automated hematology analyzer (ADVIA-2120) and two point-of-care devices (HemoCue 201+ and HemoCue 301).
Main Results:
- Capillary blood yielded higher mean Hb levels (0.32-0.47 g/dL) compared to venous blood.
- Point-of-care devices (HemoCue) showed higher mean Hb levels (0.19-0.46 g/dL) than the automated analyzer (ADVIA-2120).
- HemoCue devices exhibited significantly higher measurement variance (up to 25% CV) compared to ADVIA-2120 (0.6-2% CV).
Conclusions:
- Blood draw site and analytical device significantly impact Hb measurement means and variability, even in controlled settings.
- Differences in methods can lead to misclassification of anemia status.
- Maintaining consistency in blood draw site and Hb measuring device is essential for reliable anemia assessment and comparison across studies.
More Related Videos
05:35Author Spotlight: Developing a Point-of-Care Hemoglobin Estimation Method for Anemia Management
Published on: January 19, 2024
894
09:33Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
Published on: December 23, 2022
2.3K
Related Concept Videos
01:21Sites for measruring blood pressure
2.1K
Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
The Brachial Artery: Primary Site for Blood Pressure Measurement
2.1K
01:26Blood Studies I: ABG and VBG
652
Blood studies are critical in the medical field, enabling healthcare professionals to assess a patient's health status accurately. This page will focus on two significant blood studies: Arterial Blood Gas (ABG) and Venous Blood Gas (VBG).
Arterial Blood Gas (ABG)
Arterial Blood Gas (ABG) studies are crucial for assessing the lungs' ability to supply oxygen and remove carbon dioxide, reflecting the patient's ventilation status. They also help understand the kidneys' capacity to...
Arterial Blood Gas (ABG)
Arterial Blood Gas (ABG) studies are crucial for assessing the lungs' ability to supply oxygen and remove carbon dioxide, reflecting the patient's ventilation status. They also help understand the kidneys' capacity to...
652
01:25Errors occurring during blood pressure monitoring
826
Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
Several factors...
826
01:10Pre-Procedural Guidelines for Assessing Blood Pressure
613
Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the...
613
01:30Drug Binding to Blood Components
211
When drugs enter systemic circulation, they interact with various components of the blood, including proteins such as human serum albumin (HSA), α1-acid glycoprotein (AAG), lipoproteins, globulins, and red blood cells (RBCs).
HSA is the most abundant plasma protein and is vital in drug binding. It contains distinct drug-binding sites, with different drugs exhibiting affinity for specific sites. There are three main drug-binding domains for HSA: sites I, II, and III. These domains are...
HSA is the most abundant plasma protein and is vital in drug binding. It contains distinct drug-binding sites, with different drugs exhibiting affinity for specific sites. There are three main drug-binding domains for HSA: sites I, II, and III. These domains are...
211
01:30Equipments Used To Measure Blood Pressure
1.1K
Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
1.1K