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Related Concept Videos

Urine Studies I: Urinalysis01:29

Urine Studies I: Urinalysis

38
Urinalysis is a widely used diagnostic test that analyzes urine's physical, chemical, and microscopic characteristics. Healthcare providers use it to detect and monitor various health conditions, including renal disease, urinary tract infections (UTIs), diabetes, and metabolic or systemic disorders.Components of UrinalysisUrinalysis consists of three primary components: physical, chemical, and microscopic examination. Each provides unique insights into the urine sample and, by extension, the...
38
Urea Cycle01:23

Urea Cycle

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The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
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Urine: Physical and Chemical Properties01:18

Urine: Physical and Chemical Properties

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Urine comprises approximately 95% water and 5% solutes. The primary ingredient, apart from water, is urea - a byproduct of the breakdown of amino acids. Other notable components include uric acid, a residue from nucleic acid metabolism, and creatinine, a metabolite from creatine phosphate breakdown in skeletal muscle tissue.
The concentration of these solutes varies, with urea being the most abundant nitrogenous waste product. Other solutes include sodium, chloride, potassium, phosphate,...
933
Urine Studies II: Urine Culture and Sensitivity Test01:26

Urine Studies II: Urine Culture and Sensitivity Test

54
A urine culture and sensitivity test is a diagnostic procedure used to identify urinary tract bacterial infections and determine the most effective antibiotics for treatment. This test is generally preferred when a patient shows manifestations of a urinary tract infection, such as frequent or painful urination, cloudy or foul-smelling urine, or lower abdominal pain.Purpose of the TestThe primary goals of a urine culture and sensitivity test are to:Determine the specific bacteria causing the...
54
Physiology of Urine Formation01:24

Physiology of Urine Formation

4.5K
Urine formation is an essential function of the human body. It plays a critical role in maintaining homeostasis by regulating the volume and composition of body fluids. The kidneys, the primary organs involved in this process, filter blood to remove waste products and excess substances, ultimately producing urine.
Glomerular Filtration
The first stage in urine formation is glomerular filtration. Each kidney contains approximately 1 million nephrons, the functional units of filtration, with a...
4.5K
Comparative Excretory Systems02:24

Comparative Excretory Systems

19.6K
Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
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Related Experiment Video

Updated: Jul 17, 2025

A Detailed Protocol for Perspiration Monitoring Using a Novel, Small, Wireless Device
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A Detailed Protocol for Perspiration Monitoring Using a Novel, Small, Wireless Device

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Sweat analysis for urea sensing: trends and challenges.

Abhishek Futane1, Mallika Senthil2,3, Jayashree S2

  • 1Fakulti Kejuruteraan Elektronik dan Kejuruteraan Komputer, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia.

Analytical Methods : Advancing Methods and Applications
|August 30, 2023
PubMed
Summary
This summary is machine-generated.

Wearable sweat sensors offer a non-invasive alternative to blood tests for monitoring health. Lab-On-Chips (LOCs) utilizing sweat show promise for quick, economical disease detection and kidney function assessment.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Wearable Technology

Background:

  • Rising global populations increase demand for advanced healthcare solutions.
  • Wearable technologies offer continuous monitoring, overcoming limitations of traditional biofluid sampling.
  • Sweat analysis presents a promising, non-invasive method for biomarker quantification and health assessment.

Purpose of the Study:

  • To review recent advancements in sweat-based Lab-On-Chips (LOCs).
  • To highlight LOCs as a viable alternative to invasive blood-urea testing.
  • To detail sweat collection methods and urea sensing mechanisms.

Main Methods:

  • Comprehensive literature review of sweat-based LOCs and urea sensing technologies.
  • Analysis of various sweat collection techniques (direct skin, near-skin, microfluidic).
  • Explanation of the physiological role and sensing mechanisms of urea in biofluids.

Main Results:

  • Sweat-based LOCs are emerging as effective tools for non-invasive biomarker monitoring.
  • Detailed mechanisms for urea sensing in sweat have been elucidated.
  • Various sweat collection methods offer different advantages for continuous monitoring.

Conclusions:

  • Sweat-based LOCs represent a significant advancement over traditional blood testing for urea.
  • Further research and technological development are crucial for widespread clinical implementation.
  • These technologies promise economical and efficient disease diagnosis and health management.