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 ......
Other Articles |

A STUDY OF BLOOD-PRESSURE IN NORMAL CHILDREN

MAY MICHAEL, M.D.
Am J Dis Child. 1911;I(4):272-275. doi:10.1001/archpedi.1911.04100040025003.
Text Size: A A A
Published online

It was 100 years after Harvey's discovery of the circulation of the blood that Hales demonstrated blood-pressure (1733), but it was a century later before physiologic experiments gave any reliable results. Ludwig1 in 1847 was the first to obtain a blood-pressure tracing, by means of a recording manometer directly connected with an open artery. These experiments quickly led to the introduction of clinical methods. V. Basch in 1882 constructed the tonometer, the perlotte of which could be placed over any artery. Roy and Adami2 in 1890 constructed the first instrument based on direct compression of the artery—a flexible rubber bag containing water to exert the pressure and a mercurial manometer for a recorder. In 1896 Riva Rocca and Leonard Hill independently substituted air for water in the bag for compression and, although a number of other instruments have since been invented, the Riva Rocca model is the one

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();