0
ARTICLE |

WBC Differential Counts

Dennis W. Ross, MD, PhD
JAMA. 1983;250(4):483-484. doi:10.1001/jama.1983.03340040027014.
Text Size: A A A
Published online

To the Editor.—  The editorial (1983; 249:639) and several related articles (1983;249:613 and 1983;249:633) in the Feb 4 issue of The Journal raise some important questions concerning the WBC differential count. The evaluation of the correct use of this test depends to a degree on how it is executed. The manual differential cell count is limited in both precision and accuracy and is particularly poor at recognizing a small number of abnormal cells or evaluating conditions of patients with a low total WBC count.1,2 It works best on "normals." Flow cytometry is a new technology for recognizing cells that is not limited by these shortcomings. At the moment, several manufacturers have flow cytometry systems for the clinical laboratories. The problem of precision is solved by counting greatly increased numbers of cells, and accuracy is based on objective physical measurements rather than subjective morphological findings. The ability to offer simultaneous

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

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();