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Related Concept Videos

Pulse Oximetry01:24

Pulse Oximetry

1.7K
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
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Guidelines For Measuring Vital Signs01:19

Guidelines For Measuring Vital Signs

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Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
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Special considerations while measuring pulse01:13

Special considerations while measuring pulse

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Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
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Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
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Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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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...
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Assessment of radial pulse01:11

Assessment of radial pulse

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Assessment of Radial Pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
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Related Experiment Video

Updated: May 4, 2026

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care
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Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care

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Where do pulse oximeter probes break?

S Crede1, G Van der Merwe, J Hutchinson

  • 1Powerfree Education and Technology, Cape Town, South Africa, sarahcrede@gmail.com.

Journal of Clinical Monitoring and Computing
|January 15, 2014
PubMed
Summary

Pulse oximeter probe failures, particularly in wiring, are common in low-resource settings. Improving probe durability, especially wiring, can enhance the accessibility and affordability of pulse oximetry.

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Area of Science:

  • Biomedical Engineering
  • Medical Device Technology
  • Global Health

Background:

  • Pulse oximetry is vital for monitoring blood oxygen saturation (SPO2) but often inaccessible in low-resource settings due to device cost, fragility, and maintenance challenges.
  • Existing pulse oximeter probes are not designed for the demanding conditions of low-resource environments, leading to frequent breakages and high replacement costs.

Purpose of the Study:

  • To investigate the common failure points and nature of pulse oximeter probe breakages in a low to middle-income country.
  • To inform the design of more robust and suitable pulse oximeter probes for resource-limited healthcare facilities.

Main Methods:

  • A retrospective review of 1,840 job cards from a medical device repair company in South Africa specializing in pulse oximeter probes.
  • Analysis of failure sites for various pulse oximeter probe types, including finger-clip and neonatal wrap probes.

Main Results:

  • Finger-clip probes constituted 60.2% of probes sent for repair.
  • Probe wiring was the most common failure point (>50%) for most probe types, excluding neonatal wraps.
  • Neonatal wrap probes most frequently failed at the strap (51.5%).
  • The estimated cost of repairs and assessments exceeded ZAR 738,810 (USD $98,508).

Conclusions:

  • Improving the durability of pulse oximeter probe wiring is crucial for extending probe lifespan.
  • Enhanced probe longevity will significantly improve the affordability and accessibility of pulse oximetry in low-resource settings.
  • Addressing probe failure is a high-priority intervention for healthcare in resource-limited environments.