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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

4.3K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
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Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

1.6K
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's...
1.6K
Thermosensation01:43

Thermosensation

29.7K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Ultrasonography01:17

Ultrasonography

6.5K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
6.5K
Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

1.4K
Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
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Photoacoustic Cystography
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Absolute photoacoustic thermometry in deep tissue.

Junjie Yao1, Haixin Ke1, Stephen Tai1

  • 1Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA.

Optics Letters
|December 11, 2013
PubMed
Summary

This study introduces a new photoacoustic thermography method for accurate deep tissue temperature measurement. The technique achieves precise absolute temperature readings, crucial for monitoring therapies like thermotherapy.

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Area of Science:

  • Biomedical Optics
  • Acoustic Imaging
  • Thermal Medicine

Background:

  • Accurate temperature monitoring in deep tissues is essential for effective thermotherapy.
  • Traditional methods face challenges in deep tissue penetration and accurate temperature quantification.
  • Photoacoustic thermography offers a non-invasive approach for subsurface imaging.

Purpose of the Study:

  • To develop and validate an absolute temperature measurement method using photoacoustic thermography for deep tissues.
  • To address the limitations of existing methods by compensating for temperature-independent factors.
  • To enable precise temperature monitoring in biologically relevant scenarios.

Main Methods:

  • Utilized the dual temperature dependencies of the Grüneisen parameter and the speed of sound in tissue.
  • Employed ratiometric measurements at two adjacent temperatures to eliminate confounding variables.
  • Validated the method by measuring temperatures of blood-filled tubes ~9 mm deep in chicken tissue.

Main Results:

  • Achieved accurate absolute temperature measurements in the range of 28°C to 46°C.
  • Demonstrated a temperature measurement accuracy of approximately 0.6°C.
  • Successfully quantified temperatures in deep tissue models.

Conclusions:

  • The proposed photoacoustic thermography method enables accurate absolute temperature monitoring in deep tissues.
  • This technique holds significant potential for real-time temperature guidance during therapeutic interventions like thermotherapy.
  • The ratiometric approach effectively overcomes challenges associated with deep tissue imaging and temperature quantification.