0
March 1920, Vol 25, No. 3 >
ARTICLE | March 1920

ON THE PLATELET COUNT AND BLEEDING TIME IN DISEASES OF THE BLOOD

H. C. GRAM, M.D.
Arch Intern Med (Chic). 1920;25(3):325-332. doi:10.1001/archinte.1920.00090320096008.
Text Size: A A A
Published online
Article
References
Comments

The blood platelets, the third corpuscular element of the blood, have since the fundamental work of Bizzozero, been the object of many researches, the results of which, in brief, are the following:

  1. The platelets are a normal element of the blood of great importance for coagulation and thrombosis.

  2. The place of origin of these bodies is not known with absolute certainty, although most authors believe in Wright's theory, that traces their descent to the megakaryocytes of the bone marrow.

  3. The platelet count normally varies more than does the number of red and white cells.

  4. The platelet count is low in genuine, idiopathic purpura, and in certain diseases of the blood and infections (pernicious anemia and typhoid).

  5. When the number of platelets falls below certain values, the symptoms of a hemorrhagic diathesis occur.

The methods for counting the platelets hitherto published, all use blood from a skin prick and may be divided in two groups

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

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

References

Correspondence

Submit a Letter
CME
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.
Clear Answers | Save For Later
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).
Compression-Only CPR: Pushing the Science Forward
Cone
AAM 2010;304:1493-1495.
All you need to read in the other general journals
BMJ 2010;341:c5893-c1494.
Submit a Comment

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

More Listings at
JAMACareerCenter.com >

© 2013 American Medical Association. All Rights Reserved.
Powered bySilverchair Information Systems