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Related Concept Videos

Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

201
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
201
Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

206
Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
206
Serum Laboratory Studies, Stool Test, Breath Test01:30

Serum Laboratory Studies, Stool Test, Breath Test

325
Gastrointestinal (GI) diagnostic studies are pivotal in confirming, ruling out, diagnosing, or staging various diseases, including cancers. Following diagnosis, allocating time for discussions with the patient and providing informational resources is crucial. Diagnostic assessments of the GI tract often occur in outpatient settings like endoscopy suites or GI labs. Preparation for these tests may include dietary restrictions, fasting, liquid bowel preparations, laxatives, enemas, and the...
325

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Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction
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Sample Collection and Processing in Volatile Organic Compound Analysis for Gastrointestinal Cancers.

Weiyang Zheng1, Yiyang Min2, Ke Pang2

  • 1Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China.

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Volatile organic compounds (VOCs) show promise for non-invasive cancer screening. This review covers VOC sampling methods for gastrointestinal cancers, highlighting automation and future improvements for clinical use.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Oncology

Background:

  • Volatile organic compounds (VOCs) are increasingly recognized for their potential in non-invasive disease detection.
  • Gastrointestinal cancers require improved screening methods due to significant unmet needs for effective, affordable, and non-invasive options.

Purpose of the Study:

  • To review current sampling methods for VOC analysis in gastrointestinal cancers.
  • To discuss advancements in automated VOC sampling techniques.
  • To suggest improvements for sample collection and processing to facilitate clinical adoption of VOC analysis.

Main Methods:

  • Literature review of studies on VOCs and gastrointestinal cancer diagnostics.
  • Detailed discussion of various sample collection and preparation techniques.
  • Analysis of recent developments in automated sampling technologies.

Main Results:

  • Sample preparation significantly impacts the quality and feasibility of VOC analysis.
  • Automated sampling techniques represent a key advancement in the field.
  • Standardization and optimization of sample handling are crucial for clinical application.

Conclusions:

  • VOC analysis holds significant promise for non-invasive gastrointestinal cancer screening.
  • Advancements in sampling methods, particularly automation, are critical for clinical translation.
  • Further improvements in sample collection and processing are needed to popularize VOC analysis in healthcare settings.