Information Notice No. 86-59: Increased Monitoring of Certain Patients with Implanted Coratomic, Inc, Model C-100 and C-101 Nuclear-Powered Cardiac Pacemakers
SSINS. No.: 6835
IN 86-59
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
July 14, 1986
Information Notice No. 86-59: INCREASED MONITORING OF CERTAIN PATIENTS
WITH IMPLANTED CORATOMIC, INC, MODEL
C-100 AND C-101 NUCLEAR-POWERED CARDIAC
PACEMAKERS
Addressees:
All NRC licensees authorized to use nuclear-powered cardiac pacemakers.
Purpose:
This notice is to alert users of Coratomic, Inc. Model C-100 and C-101
nuclear-powered cardiac pacemakers of the manufacturer's recent warning of
possible problems with certain units. The manufacturer recommends increased
monitoring of patients with these units implanted. It is expected that
licensees will review this information for applicability to their patients
and consider actions, if appropriate. However, suggestions contained in this
information notice do not constitute NRC requirements, therefore, no
specific action or written response is required.
Description of Circumstances:
By letter dated March 14, 1986, the manufacturer, Coratomic, Inc., notified
applicable attending physicians of possible problems with Model C-100 and
C-101 plutonium-powered pacemakers that were manufactured between September
1974 and October 1977. During that time, "2CN potting material," a glue-like
substance, was used in the construction of the pacers. The reversion of the
2CN potting material to a viscous form in some units has lead to a rate drop
and to a higher-than-anticipated random transformer failure rate.
Accordingly, Coratomic recommends that the monitoring of affected patients
be increased to once every 3 months. The March 14 letter included a listing
of affected patients.
Discussion:
There is no radiological hazard associated with the problem described in
Coratomic's March 14, 1986 letter. However, this notice serves as a reminder
that, as a condition of their license, licensees are required to follow the
manufacturer's protocol and to notify the NRC within 10 days of loss of
contact with a nuclear pacemaker patient. If you have any difficulty
locating or contacting any affected patient, the NRC suggests you contact
the manufacturer for assistance. However, since the Coratomic protocol,
dated either August 1, 1974 or November 1, 1975, specifies in-person
followup visits every 6 months for patients with Coratomic Model C-100 or
C-101 pacemakers implanted for more than 6 months, you should have no
difficulty in contacting affected patients.
.
IN 86-59
July 14, 1986
Page 2 of 2
No specific action or written response is required by this information
notice. If you have any questions regarding this matter, please contact the
Regional Administrator of the appropriate NRC regional office or this
office.
James G. Partlow, Director
Division of Inspection Programs
Office of Inspection and Enforcement
Technical Contact: J. R. Metzger, IE
(301)492-4947
Attachment: List of Recently Issued IE Information Notices
Page Last Reviewed/Updated Tuesday, March 09, 2021