0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
ARTICLE |

To the Editor.-Reply

Mitchell L. Rhodes, MD
Arch Intern Med. 1980;140(3):440-441. doi:10.1001/archinte.1980.00330150154042.
Text Size: A A A
Published online

ABSTRACT

I appreciate the opportunity to clarify some misunderstandings of interpretation of our article "Relationship Between Arterial and Venous Bicarbonate Values," as expressed in the letters of Drs Riff, Westhoven, and Marshall. Drs Westhoven and Riff point out the linear correlation found between arterial bicarbonate, calculated from the Henderson-Hasselbalch equation, and measured venous CO,. Dr Riff asked why one cannot substitute the venous value for the arterial value in the equation since it is "virtually identical." We never questioned the validity of the equation as Dr Riff implies. Examination of the shape of the 95% confidence interval on page 441 of our article demonstrates that in the 336 patients with altered arterial bicarbonate values, either above or below normal, the figure progressively widens, indicating greater scatter (nonlinearity) in the relationship to venous CO2. Our points were that one should not try to perform quality control checks on the blood gas

Topics

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

First Page Preview

View Large
First page PDF preview

Figures

Tables

References

Correspondence

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.
Submit a Comment

Multimedia

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

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

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

Jobs
brightcove.createExperiences();