Bleeding during a bowel movement
It identifies rectal or sigmoid changes that may explain bleeding.
Targeted rectal and sigmoid colon examination to investigate bleeding and bowel changes
Sigmoidoscopy examines the final large bowel for inflammation, lesions, polyps or other changes. Assessment determines whether it provides needed information or the whole colon should be examined.
Dr. Eduardo Navarro LaraColorectal surgeon · Colon and rectal tests

What it shows
The test examines distal large bowel lining. Its targeted scope investigates relevant changes without representing a full colon examination.
The indication depends on symptoms, previous tests and the area needing examination.

When it adds information
Bowel changes do not all require the same test. Assessment chooses the scope answering the clinical question.
It identifies rectal or sigmoid changes that may explain bleeding.
It may help when stool frequency, consistency or pattern changes and distal examination is needed.
Direct examination documents visible extent and whether further assessment is needed.
The follow-up reason and available tests determine whether targeted examination is sufficient.
Sigmoidoscopy or colonoscopy
Both view inside the large bowel but have different scopes.
Focuses on the rectum and sigmoid colon, directly answering questions in that area.
Views the whole colon when history, prevention, symptoms or findings require greater scope.
Learn about colonoscopyFrom assessment to result
First define the goal, then provide instructions and interpret results in the original clinical context.
Check availabilityThe doctor reviews symptoms, history and previous tests to determine whether distal examination is useful.
If scheduled, the team gives procedure- and case-specific instructions.
The test directly shows rectal and sigmoid lining.
Results guide treatment, follow-up, sampling or another test where appropriate.
Possible findings
The value goes beyond viewing: findings are related to symptoms and history to choose care.
Lining changes need interpretation with symptoms, history and other tests.
Visible areas may need documentation, follow-up or further investigation.
Finding polyps may require colonoscopy to examine the remaining large bowel.
Visualization locates rectal or sigmoid changes without excluding sources beyond its reach.
Individual preparation
A clean area improves visibility. Test type, medicines and history change instructions, so generic online preparation is unsuitable.
After testing
The team should explain expected discomfort and signs requiring contact or care afterward.

Specialist care
Dr. Eduardo Navarro Lara is a colorectal surgeon offering sigmoidoscopy in his current practice.
Assessment relates the test to symptoms, history and findings rather than selecting by name alone.
Explore his training and experienceCare for patients in Guadalajara, Zapopan and the metropolitan area
Our support team checks times at Unidad Médica Shakespeare or Torre de Consultorios Hospital Ángeles Andares. Procedure location and scheduling are confirmed during care.
Frequently asked questions
Direct examination of the rectum and sigmoid colon, the large bowel's final segment.
No. Sigmoidoscopy focuses on the final colon segment; colonoscopy examines the whole large bowel.
Yes, when the doctor needs to see the rectum and sigmoid colon. Prior assessment defines the necessary scope.
Yes, adequate visibility requires a clean area, but the team must prescribe exact preparation. Do not use laxatives, enemas or dietary changes from general advice.
This depends on the test type, purpose and facility protocol. Confirm with the team before scheduling.
Some examinations allow sampling or treatment of findings, depending on instruments, findings and protocol. Confirm according to the case before or after examination.
Simply ask about times and assessment availability. Consultation gathers symptoms, tests and clinical details.
Rectal and sigmoid colon examination
Request assessment with Dr. Eduardo Navarro to define scope and receive specific instructions.