Related Experiment Video
Updated: Aug 15, 2026

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
Published on: December 7, 2016
Evaluation of portable haemoglobinometer in general practice
The HemoCue system for estimating haemoglobin was evaluated within urban general practice. It gave excellent results when used within a laboratory environment (on 103 paired samples) but disappointing ones when evaluated by practice nurses within general practice (on 235 paired samples). The most likely source of error was inadequate mixing of the blood specimens before sampling, which might be obviated by using a rotating mixer. It is emphasised that equipment intended for use in general practice should be evaluated under normal working conditions envisaged.
The HemoCue system for estimating haemoglobin was evaluated within urban general practice. It gave excellent results when used within a laboratory environment (on 103 paired samples) but disappointing ones when evaluated by practice nurses within general practice (on 235 paired samples). The most likely source of error was inadequate mixing of the blood specimens before sampling, which might be obviated by using a rotating mixer. It is emphasised that equipment intended for use in general practice should be evaluated under normal working conditions envisaged.
Related Concept Videos
Guidelines For Measuring Vital Signs
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
Equipments Used To Measure Blood Pressure
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...
Errors occurring during blood pressure monitoring
Several factors...
Assessment of blood pressure in brachial artery(one-step method)
Prepare for the Procedure:
Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Pre-Procedural Guidelines for Assessing Blood Pressure

