JoVE - Journal of Visualized Experiments
JoVE Visualize
Contact Us

Near-infrared spectroscopy data for foot skin oxygen saturation in healthy subjects

  • 0Department of Plastic Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
International Wound Journal +

|

February 28, 2024

|

February 28, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Near-infrared spectroscopy (NIRS) foot measurements vary by skin type and location. Darker skin (Fitzpatrick skin type 6) shows lower oxygen saturation on the foot

Area Of Science

  • Biomedical Engineering
  • Dermatology
  • Medical Imaging

Background

  • Near-infrared spectroscopy (NIRS) is a non-invasive optical technique used to measure tissue oxygenation.
  • Normative data for NIRS in foot assessment is limited, particularly considering variations in skin pigmentation and anatomical location.
  • Fitzpatrick skin type (FST) is a widely used classification system for skin pigmentation.

Purpose Of The Study

  • To establish normative data for NIRS measurements on the dorsum and plantar surfaces of the foot.
  • To evaluate the influence of Fitzpatrick skin type (FST) on NIRS parameters (oxygen saturation, oxyhaemoglobin, deoxyhaemoglobin).
  • To compare NIRS measurements between the dorsal and plantar regions of the foot.

Main Methods

  • 110 healthy volunteers were enrolled.
  • NIRS measurements were acquired using a SnapshotNIR device on the dorsum and plantar foot.
  • Data was analyzed based on Fitzpatrick skin type (FST 1-6) and foot region.

Main Results

  • On the dorsal foot, individuals with FST 6 exhibited significantly lower oxygen saturation and oxyhaemoglobin compared to lighter skin types (FST 1-5).
  • No significant differences in NIRS parameters were observed on the plantar foot across different FSTs.
  • Higher oxyhaemoglobin and deoxyhaemoglobin levels were found on the plantar compared to the dorsal foot, with no difference in oxygen saturation.
  • Areas with no NIRS data were predominantly on the dorsal foot in FST 5-6, with significantly larger areas in FST 6.

Conclusions

  • Fitzpatrick skin type significantly impacts NIRS measurements on the dorsal foot, necessitating consideration of skin pigmentation in clinical applications.
  • NIRS data should be interpreted cautiously in individuals with darker skin pigmentation, especially on the dorsal foot.
  • Future NIRS studies should incorporate skin pigmentation as a critical covariate for accurate interpretation of results.

Keywords:

Related Concept Videos

Guidelines For Measuring Vital Signs 01:19

1.6K

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.

• Patient Comfort Level: Patients must be relaxed and comfortable before vital sign...

Pulse Oximetry 01:24

328

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...

Special considerations while measuring oxygen saturation 01:19

592

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.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...

IR Frequency Region: Fingerprint Region 01:03

887

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...