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Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
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Cancer Prevention02:59

Cancer Prevention

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Serum Laboratory Studies, Stool Test, Breath Test01:30

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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...
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
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Related Experiment Video

Updated: Feb 22, 2026

Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity Detection
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Colorectal cancer screening: Using evidence-based guidelines.

Suzanne M Mahon1

  • 1Suzanne M. Mahon is a professor at the Department of Internal Medicine, Division of Hematology/Oncology and professor of adult nursing at Saint Louis University, School of Nursing, St. Louis, Mo.

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This summary is machine-generated.

Colorectal cancer screening is crucial for early detection. Nurse practitioners (NPs) should use evidence-based guidelines to choose the best prevention and screening methods based on patient history.

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Area of Science:

  • Oncology
  • Preventive Medicine
  • Primary Care

Background:

  • Colorectal cancer is a leading cause of cancer diagnosis globally.
  • Effective prevention and early detection strategies significantly improve patient outcomes.
  • Clinical practice guidelines offer a framework for evidence-based decision-making.

Purpose of the Study:

  • To emphasize the importance of colorectal cancer screening.
  • To highlight the role of nurse practitioners (NPs) in implementing screening protocols.
  • To guide the selection of appropriate screening modalities based on individual risk factors.

Main Methods:

  • Review of current evidence-based guidelines for colorectal cancer screening.
  • Analysis of factors influencing screening recommendations, including personal and family history.
  • Emphasis on the integration of guidelines into routine clinical practice by NPs.

Main Results:

  • Multiple screening and prevention options exist for colorectal cancer.
  • Personal and family history are key determinants in selecting the optimal screening strategy.
  • Adherence to guidelines ensures appropriate and timely screening.

Conclusions:

  • Nurse practitioners play a vital role in colorectal cancer prevention and early detection.
  • Utilizing evidence-based guidelines is essential for NPs to provide optimal patient care.
  • Personalized screening approaches based on risk assessment improve the effectiveness of colorectal cancer detection.