0
ARTICLE |

TESTS FOR OCCULT BLOOD.

JAMA. 1907;XLIX(19):1611. doi:10.1001/jama.1907.02530190045011.
Text Size: A A A
Published online

The clinical significance of traces of blood in the feces, demonstrable only by chemical tests, has been emphasized by numerous investigators since attention was called to this subject by Boas in 1903. In the diagnosis of malignant disease of the gastrointestinal tract, which practically always presents evidence of occult bleeding, and of peptic ulcers which periodically give this sign, it is found to be of the greatest assistance. The experience of Goodman1 tends to confirm the conclusion drawn from other recent researches as to the relative value of the different chemical tests. The benzidin test, while far the most delicate, reacts to a number of other substances, such as oxidizing ferments, iron salts, pus, saliva, bowel detritus, mucus, potassium iodid, animal charcoal, and copper. A negative test, however, is positive proof of the absence of blood. A positive benzidin test may be checked by aloin or guaiac, which are

Topics

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
/>
First page PDF preview

Figures

Tables

References

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

Jobs
brightcove.createExperiences();