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CATALOGUE # : 850610
# PARTS: 003
Type: OPEN CHEST
Model: S-D4
Serial #: 11/PROTOTYPE
Manufacturer: NRC
Address #:OTTAWA ON CAN
Year Code: X From Date: 1950 To Date: 1955
Article Eng Description: STIMULATOR & DEFIBRILLATOR
Comments:
BREAKDOWN: 1 Stimulator-difibrillator; 2 Foot Padel Micro Switch; 3 Two Electrdes/Foot
Pedal allows surgeon to control flow of electricity while positioning electrodesby
hand/electrodes placed on either side of the heart for open chest model on either side of
chest wall in later closed chest mdels/outcome of hypothermia experiments by hopps and
bigelow/appeared on CBC local TV news Aug.2, 1985.
Canadian Medical Innovation, Developed and Manufactured at National Research Council, Canada.
Example of very early Cardiac Stimulator-Difibrillator. (First was built by Jack Hopps C. 1950) Instrument used 60-Hz current at voltages up to 220V to arrest fibrillation through the open chest. The shocks regulated and/or restarted the beating of heart (stimulation), or were intended to instaneously stop and restart beating of heart muscle.
Function: To stimulate a stopped heart to resume beating, and to regulate heart-beat.
Significance to Technology:
Experimental pacemakers used to study the threshold of pacing,
non- implantable because researchers needed across to the controls to vary the speed.
More sophisticated version of round pacemakers 850601. Prototype variable speed pacemakers for laboratory use to study the threshold of heart pacing, waveform studies and pulse widths.
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CATALOGUE # : 850601
# PARTS: 003
Type : NON-IMPLANTABLE/ROUND
Serial # : PROTOTYPE
Manufacturer : NRC
Address # :OTTAWA ON CAN
Year Code : X From Date: 1965 To Date: 1970
Article Eng Description: PACEMAKER, CARDIAC
Comments : NO. BREAKDOWN:.1-.3 PACEMAKERS/
Used on dogs, plugged into an external opening in the back of the animal, held in palce with a silastic interface. At one time Dr. O.Z. Ror had 6 dogs connected to external pacemakers at once in a long term study of the efficiency of heart pacemakers.
Significance to Canada:
Part of NRC pacemaker program. 1st Pacemaker developed at NRC
in 1950 by John Hopps was approimately 30CM long and several CM high & wide.
Significance to Technology:
Developemnt of transistors & reliable betteries permitted design of pacemaker of
implantable size (1957). Pacemaker regarded as one of the greatest Canadian engineering
achievements of the 20th century.
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CATALOGUE # : 850602 Used on dogs, connected to opening in back of animal & held in place with silastic interface. At one time Dr. O.Z. Roy had 6 dogs connected to external pacemakers at once in a long term study of the efficiency of heart pacemakers. |
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Catalogue # : 850605
# Parts: 003
Type : IMPLANTABLE/OBLONG
Serial # : PROTOTYPE Comp Serial # :
Manufacturer : NRC
Address # : OTTAWA ON CAN
Year Code : X From Date: 1965 To Date: 1970
Article Eng Description: PACEMAKER, CARDIAC
Used in experimental program to delicer electrical stimulus to heart, in order to stimulate rhymthic herat beat.
Used in animal experiment of biological energy supplies, in which metals in contact with body fluids acted as a natural battery.
Reprinted courtesy of National Research Council of Canada
