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dental anaesthesia unit

https://mhc.andornot.com/en/permalink/artifact13105
Dates
1950
1960
circa 1950-1960
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020016 a-p
Description
Dental anaesthesia unit, metal enamelled in green and black (a); black top with silver metal railing at sides and back; to the left and right are metal knobs, tank attachments and circular gauges for cyclopropane, nitrous oxide, oxygen and carbon dioxide; gauges have glass coverings, white paper an…
  3 images  
Accession Number
010020016 a-p
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dentistry, Operative -- instrumentation
Ventilators, Mechanical
Anesthesiology, instrumentation
MM= Anesthesia, Inhalation -- machine
Description
Dental anaesthesia unit, metal enamelled in green and black (a); black top with silver metal railing at sides and back; to the left and right are metal knobs, tank attachments and circular gauges for cyclopropane, nitrous oxide, oxygen and carbon dioxide; gauges have glass coverings, white paper and red, black and grey ink; at top are four rectangular gauges for each gas showing litres per minute, c.c's per minute for NO2; front of cabinet has four drawers with black handles and lined with green felt on right side; door to cabinet on left; inside are coiled black rubber tubes attached to a rebreather bag and metal tank; four rubber black wheels at bottom of unit; metal chain hanging from bottom of unit; white metal oxygen tank attached at right (b); black rubber rebreather bag (c) attaches via silver metal attachment to black rubber tubing (d); adult black rubber inhaler (e); two coiled black rubber tubes (f, g); two rubber black straps, perhaps to attach mask to face (h, i); smaller rubber and metal attachment (j); loose black knob (k); five sections of yellow rubber tubing (l, m, n, o, p)
Number Of Parts
16
Part Names
a - unit - Size: Length 90.5 cm x Width 66.0 cm x Depth 36.4 cm
b - oxygen tank - Size: Length 51.0 cm x Diam. 8.5 cm
c - rebreather bag - Size: Length 33.0 cm x Diam. 13.3 cm
d - tubing with attachment - Size: Length 67.0 cm x Width 6.0 cm x Depth 3.0 cm
e - inhaler - Size: Length 11.7 cm x Width 9.0 cm x Depth 7.7 cm
f - coiled tubing - Size: Length 88.0 cm x Diam. 4.0 cm
g - coiled tubing - Size: Length 81.0 cm x Diam. 4.0 cm
h - rubber strap - Size: Length 72.5 cm x Width 15.0 cm x Depth 0.1 cm
i - rubber strap - Size: Length 72.5 cm x Width 15.0 cm x Depth 0.1 cm
j - attachment - Size: Length 7.5 cm x Width 7.0 cm x Depth 5.0 cm
k - knob - Size: Length 8.2 cm x Diam. 6.0 cm
l - tubing - Size: Length 22.6 cm x Diam. 1.3 cm
m - tubing - Size: Length 22.0 cm x Diam. 1.3 cm
n - tubing - Size: Length 22.0 cm x Diam. 1.3 cm
o - tubing - Size: Length 21.5 cm x Diam. 1.3 cm
p - tubing - Size: Length 17.4 cm x Diam. 1.3 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
The Heidbrink Division, The Ohio Chemical & Mfg. Co.
Site Made (City)
Minneapolis
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1950
1960
circa 1950-1960
Date Remarks
Based on donors remarks
Material
metal: silver, brown
enamel: green, black, blue, orange, grey, yellow, white
rubber: black
paper: white
ink: black, grey, red, green
glass: clear
fabric: green
Inscriptions
(a) Printed on gauges on top of unit: "CYCLOPROPANE", "NITROUS OXIDE", "CARBON DIOXIDE", "OXYGEN"; printed on knobs on left: "C3H6", "DIRECT N2O", "N2O"; on right: "O2", "DIRECT O2", "CO2"; printed on gauge on right: "USE NO OIL // CO2 // THE HEIDBRINK DIVISION // THE OHIO CHEMICAL & MFG. CO. // MINNEAPOLIS"; printed on gauge on left: "USE NO OIL // N2O // OHIO CHEMICAL // & SURGICAL EQUIPMENT CO. // A DIVISION OF // AIR REDUCTION COMPANY, INCORPORATED // MADISON, WISCONSIN, U.S.A."; printed on back of unit: "LUNDY // ROCHESTER MODEL // HEIDBRINK // KINET-O-METER // REG. US. PAT. OFF. // HEIDBRINK DIVISION OF // THE OHIO CHEMICAL & MFG. CO. // MINNEAPOLIS MINN. // PAT. NO. 1,412,866 PAT. NO. 1,989,366 // PAT. NO. 1,802,601 PAT.NO. 2,073,372 // PAT. NO. 1,858,084 // OTHER PATS. APP'D FOR // MADE IN U.S.A."; embossed on wheels: "NOELTING FAULTLESS // EVANSVILLE"; (d) printed on attachment: "BEFORE EACH USE // OHIO // TEST ENTIRE UNIT"; (e) embossed on inhaler: "MEDIUM ADULT // CONDUCTIVE"; (m) stamped on pipe: ""PORTEX" No 7 // MADE IN ENGLAND"; (l, o) stamped on pipes: ""PORTEX" No. 8H // MADE IN ENGLAND"
Permanent Location
Storage Room W2
W2-536-4-1
Condition Remarks
Unit scratched at top; enamel chipped at front of unit; metal at wheels, inside drawers and cabinet corroded; paper darkened and faded on nitrous oxide gauge; rubber hardened at end on (f, g); rubber sticky but malleable on yellow piping (l, m, n, o, p)
Copy Type
Original
Reference Types
Document
Person
JPG
Reference Comments
Dr. Harry Tregobov; Dr. P. Ralph Crawford
CD #9
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item was originally used by a colleague of Dr. Harry Tregobov from Winnipeg, Manitoba; it was purchased used in 1962 from a hospital in Saskatchewan and would be used while Dr. Tregobov performed dental work
Images
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dental anaesthesia unit

https://mhc.andornot.com/en/permalink/artifact13115
Dates
1920
1940
circa 1920-1940
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020026 a-f
Description
Dental anaesthesia unit with black plastic top (a); three gauges for oxygen, nitrous oxide and carbon dioxide have silver metal borders, glass coverings, gold-enamelled faces, printed with black, green and red enamel; silver metal knobs with grey-enamelled control panels for control, pressure, mixt…
  1 image  
Accession Number
010020026 a-f
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dentistry, Operative -- instrumentation
Ventilators, Mechanical
Anesthesiology, instrumentation
MM= Anesthesia, Inhalation -- machine
Description
Dental anaesthesia unit with black plastic top (a); three gauges for oxygen, nitrous oxide and carbon dioxide have silver metal borders, glass coverings, gold-enamelled faces, printed with black, green and red enamel; silver metal knobs with grey-enamelled control panels for control, pressure, mixture and flow; green-enamelled dial for oxygen, grey-enamelled dial for carbon dioxide; silver metal pipe comes out of front of stand, bends at 45-degree angle; top is supported by black-enamelled metal pole atop cross-shaped black-enamelled metal base, four black rubber wheels with silver metal casters; silver metal attachment on support pole to hold gas tank; black rubber rebreather bag attached to silver metal valve underneath top; two black rubber tubes with metal ends attached underneath; black rubber tube attached underneath ends with round pump; broken black rubber tube attached to silver metal semi-spherical inhaler with black rubber insert (b); blue metal nitrous oxide tank with silver metal top (c) with diamond-shaped white paper label printed with blue and black ink; white and green metal oxygen tank with silver metal top (d) with diamond-shaped white paper label printed with green, blue and black ink; tanks covered by beige fabric coverings with purple thread drawstring at tops (e, f)
Number Of Parts
6
Part Names
a - unit - Size: Length 88.4 cm x Width 48.0 m x Depth 48.0 cm
b - inhaler - Size: Length 1.34 m x Width 12.1 cm x Depth 7.8 cm
c - tank - Size: Length 51.7 cm x Diam. 11.5 cm
d - tank - Size: Length 51.7 cm x Diam. 11.5 cm
e - covering - Size: Length 40.3 cm x Diam. 11.5 cm
f - covering - Size: Length 40.3 cm x Diam. 11.5 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Heidbrink Division, The Ohio Chemical Mfg. & Co.
Site Made (City)
Minneapolis
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1920
1940
circa 1920-1940
Date Remarks
Based on supplier's catalogue
Material
metal: brown, silver
enamel: black, blue, green, yellow, red
rubber: black
plastic: black
fabric: beige, purple
paper: white
ink: black, blue, green
Inscriptions
(a) Printed on top of unit: "CONTROL VALVE // O2 DIRECT // DIRECT N2O // SHUT// PATIENT CONTROL // MIXTURE", "MIXTURE // O2-N2O // OXYGEN PERCENTAGE CONSTANT // AS PER OXYGEN GAUGE INDICATION"; printed in gauges: "GALLONS PER HOUR // CARBON DIOXIDE", "OFF ON // MEASURED N2O", "OXYGEN PERCENTAGE // THE HEIDBRINK DIVISION // THE OHIO CHEMICAL MFG. & CO. // MINNEAPOLIS"; inscribed on unit: "HEIDBRINK // MINNEAPOLIS, MINN. U.S.A."; "PAT. NO. 1687768"; (c) printed on tank label: "OHIO // MADE IN CANADA // NITROUS OXIDE // OHIO CHEMICAL CANADA // A DIVISION OF // AIR REDUCTION CANADA LIMITED", engraved on top: "Ohio Chemical"; (d) printed on tank label: "OHIO // MADE IN CANADA // FOR MEDICAL USE OXYGEN FOR MEDICAL USE // OHIO CHEMICAL CANADA // A DIVISION OF // AIR REDUCTION CANADA LIMITED // CAUTION - KEEP AWAY FROM OIL AND GREASE", engraved on top: "Ohio Chemical"
Permanent Location
(a, b, c ,d) Storage Room W2
W2-536-1-1
(e, f) Storage Room W2
W2-536-3-2
Condition Remarks
Grey enamel on control panels scratched, worn; metal underneath top rusty in places; crack in plastic at back of unit; large piece of plastic missing at back of unit; rubber pipe broken on (b), covered over with tape; paper labels on tanks (c, d) worn, crinkled, enamel peeling and metal rusty; fabric coverings (e, f) dirty
Copy Type
Original
Reference Types
Book
JPG
Reference Comments
"S.S. White Dental Catalog, Catalog-R", S.S. White Dental Mfg. Co., 1916, p. 7 (similar to outfit C3)
CD #9
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008
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electronic dental anaesthesia kit

https://mhc.andornot.com/en/permalink/artifact13458
Dates
1992
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020337 a-l
Description
Dental electronic anaesthesia kit; rectangular black leather and fabric bag with zipper closure (a); clear plastic videotape case (b) contains black plastic videotape (c) with green labels printed with white ink; rectangular grey plastic unit (d); opening top reveals four grey plastic knobs and rec…
  5 images  
Accession Number
010020337 a-l
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dentistry, Operative -- instrumentation
Ventilators, Mechanical
Anesthesiology, instrumentation
MM= Anesthesia, Inhalation -- machine
Description
Dental electronic anaesthesia kit; rectangular black leather and fabric bag with zipper closure (a); clear plastic videotape case (b) contains black plastic videotape (c) with green labels printed with white ink; rectangular grey plastic unit (d); opening top reveals four grey plastic knobs and rectangular indented space for battery; two clear plastic ziploc bags (e, f) containing paper labels printed with black ink and one pair of grey wires in each bag; stack of 49 advertising brochures (g) printed with colour and black and white ink; photograph of a woman demonstrating use of unit on front, directions and product information inside; manufacturer's pamphlet (h), white page printed with black ink and folded in two; includes features, directions, cleaning, technical information, and ordering information; silver foil-lined white envelope (i) printed with green ink contains one plastic sheet (j) with ten white facial adhesive electrodes printed with green ink; white warranty card folded into three sections (k) printed with black ink; white reply card (l) printed with black ink; one side with manufacturer's address, the other with product survey
Number Of Parts
12
Part Names
a - case - Size: Length 23.0 cm x Width 15.2 cm x Depth 5.2 cm
b - videotape case - Size: Length 20.4 cm x Width 12.0 cm x Depth 3.0 cm
c - videotape - Size: Length 18.8 cm x Width 10.4 cm x Depth 2.4 cm
d - unit - Size: Length 9.5 cm x Width 5.9 cm x Depth 3.1 cm
e - wire package - Size: Length 12.1 cm x Width 10.5 cm x Depth 0.7 cm
f - wire package - Size: Length 12.1 cm x Width 10.5 cm x Depth 0.7 cm
g - stack of brochures - Size: Length 21.6 cm x Width 9.2 cm x Depth 2.7 cm
h - pamphlet - Size: Length 32.2 cm x Width 18.9 cm x Depth 0.1 cm
i - envelope - Size: Length 21.0 cm x Width 10.9 cm x Depth 0.1 cm
j - electrode sheet - Size: Length 16.4 cm x Width 10.8 cm x Depth 0.1 cm
k - warranty card - Size: Length 27.6 cm x Width 21.4 cm x Depth 0.1 cm
l - reply card - Size: Length 15.1 cm x Width 9.5 cm x Depth 0.1 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Site Made (City)
St. Paul
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1992
Date Remarks
Printed on artefact
Material
leather: black
fabric: black
plastic: black, white, clear, grey, green
film: black
paper: white, green
ink: black, white, blue, grey, red, green, brown
metal: silver
Inscriptions
(c) Printed on label: "3M // 3M Dental // Electronic Anesthesia System // INSTRUCTIONAL VIDEOTAPE // Manufactured by // 3M Dental Products Division // St. Paul, MN 55144-1000"; printed on tape: "Scotch TM // T-60 VHS"; (d) printed on unit: "3M Dental // Electronic Anesthesia // Model 8670 // 3M Dental Products Division"; printed inside unit: "3M // Serial No. CT023378 // Battery: // IEC 6LR61 // Alkaline 9V"; (e, f) printed on label: "3M // Dental Electronic // Anesthesia Lead Wires // for Model 8670 Dental Electronic // Anesthesia Unit // No. 8685 // Mfg. Date . Lot // 091792 // Made in U.S.A. for // 3M Dental Products Division // St. Paul, MN 15144-1000 // 34-7031-7103-2 // 70-2010-0406-9 1 pair/pkg // Quantity"
Permanent Location
(a-f): Storage Room 0010
0010-B
(g-l): Storage Room 2005
2005-2-5 Box 23
Condition Remarks
Manufacturer's pamphlet (h) worn at folds; envelope (i) torn open at side
Copy Type
Original
Reference Types
Internet
JPG
Reference Comments
"Health Mantra" website
CD #1
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item was donated by Dr. William Mills from Etobicoke, Ontario; this type of anaesthesia would be used on patients who were needle-phobic, not able to have chemical anaesthetics, or did not want post-treatment numbness; electrodes were taped to the face, and the muscles were stimulated via a signal from the battery-operated unit; the patient themselves controlled the level of stimulation; one study, presented at the 2001 meeting of the American Public Health Association, found that a majority of patients found electronic anaesthesia to be acceptable; it also states that 3M's product was pulled from the market, however, because the marketability wasn't there
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Heidbrink Kinet-O-Meter anaesthesia machine

https://mhc.andornot.com/en/permalink/artifact1886
Dates
1940
circa 1940
Collection
Hotel Dieu Hospital Dept. of Anaesthesia, Kingston Collection
Category
Diagnostic & Treatment Artifacts
Classification
Anaesthesia
Accession Number
997008014 a-d
Description
(a) Heidbrink Kinet-O-Meter, Lundy Rochester Model anaesthesia machine, which consists of a rectangular green painted metal cabinet on four wheels; the front of the cabinet has a switch at the top and is divided into two halves; the right half has three pull-out (and removable) drawers - a fourth a…
Accession Number
997008014 a-d
Collection
Hotel Dieu Hospital Dept. of Anaesthesia, Kingston Collection
Category
Diagnostic & Treatment Artifacts
Classification
Anaesthesia
MeSH Heading
Anesthesiology, instrumentation
MM= Anesthesia, Inhalation -- machine
Description
(a) Heidbrink Kinet-O-Meter, Lundy Rochester Model anaesthesia machine, which consists of a rectangular
green painted metal cabinet on four wheels; the front of the cabinet has a switch at the
top and is divided into two halves; the right half has three pull-out (and removable) drawers - a
fourth and top drawer is missing; the left half has a door which opens on hinges at the left;
the space inside contains a pole which can be pulled out; a trilene absorber can be attached to
the pole (as is 997.008.034a-d) and a plastic hose leads from this to the machine; the right side
as two gauges for oxygen pressure and carbon dioxide pressure; the left side of the machine has
three gas cylinder hook-ups, two for nitrous oxide and one for cyclopropane as well as a gauge to
read the pressure of each has; at the back there is a reducing valve, and at the front is a hook-up
for an absorber (though not one attached); the top of the machine has a set of four disc flowmeter
gauges to read the flow of cyclopropane, nitrous oxide, carbon dioxide and oxygen; (b-d) three identical
pull-out drawers with black plastic handles at the front; the inside base of the drawers is
lined with green felt; these drawers fit into the right side of the machine cabinet
Number Of Parts
4
Part Names
a - machine, anaesthesia - Size: Length 105.4 cm. x Width 64.8 cm. x Depth 40.9 cm.
b-d - drawers (x3) - Size: Length 16.8 cm. x Width 35.9 cm. x Depth 15.2 cm.
Provenance
Purchased by and used at the Hotel Dieu Hospital, Kingston, Ontario, Canada
Maker
The Ohio Chemical & Mfg. Co.
Site Made (City)
Minneapolis
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1940
circa 1940
Date Remarks
Machine dates from the 1940's to early 1950's
Material
plastic: black; clear; white
metal: silver; grey
paint: green
fabric: green
Inscriptions
A manufacturer's label on the top of the back reads, "LUNDY // ROCHESTER MODEL // HEIDBRINK //
KINET-O-METER // REG. U.S. PAT. OFF. // HEIDBRINK DIVISION OF // THE OHIO CHEMICAL & MFG. CO. //
MINNEAPOLIS, MINN // PAT. NO. 1,412,866 // PAT. NO. 1,989,366 // HI-CO // PAT. NO. 1,802,601 //
PAT. NO. 2,073,372 // PAT. NO. 1,858,084 // OTHER PATS. APPL'D FOR // MADE IN U.S.A."; a small label
below this reads, "HOTEL DIEU HOSPITAL // ASSET NO. 04024"; a metal switch on the front of the
machine is stamped, "CIRCLE" on one side and "TO-FRO" on the other
Permanent Location
Storage Room 0009
0009-13-1
Condition Remarks
The machine arrived very dirty and dusty; most exposed metal parts show no corrosion, with the exception
of the nitrous oxide pressure gauge, which has a green corrosion product and the plastic
cover is also cracked; other plastic parts show no cracks or missing sections
Copy Type
Original
Reference Types
Person
Book
Other
Reference Comments
Dr. Ray Matthews; similar to 997.008.004; also see 997.008.034a-c; "Understanding Anaesthesia Equipment
-- Construction, Care and Complications" by Jerry A. Dorsch, M.D. and Susan E. Dorsch, M.D.,
1975, p. 47 (see attached photocopy)
Research Facts
This machine mixed gases according to the doctor's instructions; this machine was used on children
and adults for any type of surgery requiring anaesthesia; the disc flowmeter gauges were very inaccurate;
the central switch could cause patient death if accidentally turned; this TO-FRO or CIRCLE
switch could change the tubes leading to the patient from 1 to 2 (or the other way around, which
could be fatal); the reducing valve reduced the pressure in the gas cylinder
Exhibit History
On exhibit in Museum gallery, anaesthesia exhibit - Oct. 2 1997-Feb. 1998
Less detail

Kinet-O-Meter anaesthesia machine

https://mhc.andornot.com/en/permalink/artifact1876
Dates
1945
circa 1945
Collection
Hotel Dieu Hospital Dept. of Anaesthesia, Kingston Collection
Category
Diagnostic & Treatment Artifacts
Classification
Anaesthesia
Accession Number
997008004
Description
Kinet-O-meter anaesthesia machine which consists of two heavy cylindrical metal poles on a metal stand with four wheels; the top of one pole has two tank hook-ups each, for oxygen, nitrous oxide and carbon dioxide, with regulator on top; the top of the other pole has a hook-up for cyclopropane whic…
  4 images  
Accession Number
997008004
Collection
Hotel Dieu Hospital Dept. of Anaesthesia, Kingston Collection
Category
Diagnostic & Treatment Artifacts
Classification
Anaesthesia
MeSH Heading
Anesthesiology, instrumentation
MM= Anesthesia, Inhalation -- machine
Description
Kinet-O-meter anaesthesia machine which consists of two heavy cylindrical metal poles on a metal
stand with four wheels; the top of one pole has two tank hook-ups each, for oxygen, nitrous oxide
and carbon dioxide, with regulator on top; the top of the other pole has a hook-up for cyclopropane
which leads to a panel with four flow meters (for nitrous oxide, cyclopropane, carbon dioxide and
oxygen) in cc/liters per minute; the four flow meters lead back to the tank hook-ups by tubes; behind
the flow meters, there is a blood pressure cuff manometer with a rubber tube which would originally
have had a rubber bulb; a metal valve in the front was to be hooked up to the patient (via a
soda lime absorber) to administer a mix of the four gases; the back of the machine has a wrench attached
permanently by a metal chain, for turning on cylinders of gas
Number Of Parts
1
Provenance
Purchased by and used at the Hotel Dieu Hospital, Kingston, Ontario, Canada
Maker
Ohio Chemical & Mfg. Co.
Site Made (City)
Minneapolis
Site Made (State)
Minnesota
Site Made (Country)
United States of America
Dates
1945
circa 1945
Date Remarks
Machine dates from the late 1940's to the early 1950's
Material
plastic: black; clear; blue; yellow; grey; green
rubber: black
metal: silver; yellow
Inscriptions
Label on the front of the machine reads, "HI-CO // THE HEIDBRINK CO. // MINNEAPOLIS MINNESOTA //
MADE IN U.S.A. // DES. PAT. NO. 102,632"; a label under this reads, "AMERICAN [---]AL // ACCEPTED
// COUNCIL // OF PHYSICAL // THERAPY"; a label under this reads, "HOTEL DIEU HOSPITAL // ASSET NO.
04026"; a manufacturer's label at the back reads, "LUNDY // ROCHESTER MODEL // HEIDBRINK // KINETO-METER
// REG. U.S. PAT. OFF. // HEIDBRINK DIVISION OF // OHIO CHEMICAL & MFG CO. // MINNEAPOLIS
MINN. // HI-CO // PAT. NO. 1,412,866 // PAT. NO. 1,802,601 // PAT. NO. 1,989,366 // PAT. NO.
2,073,372 // PAT. NO. 1,858,084 // OTHER PATS. APPL'D FOR // MADE IN U.S.A."
Permanent Location
Storage Room W1
W1-7-2
Dimension Notes
Length: 108.0 cm. x Width: 47.8 cm. x Depth: 61.2 cm.
Condition Remarks
The machine arrived very dirty and dusty; the pressure dials for the carbon dioxide and nitrous oxide
gas hook-ups are very corroded; the plastic cover is missing for the carbon dioxide dial and
broken and covered with a corrosion product for the nitrous oxide dial; the rubber hose on the main
pressure dial is cracked in several spots; #2 no new damage
Copy Type
Original
Reference Types
Person
Document
Other
JPG
Reference Comments
Dr. Ray Matthews and John Sikora; item is similar to 997.008.014; similar in function to 997.008
.002, .008 and .014; see photocopy of blood pressure manometer from 1964 Ohio catalogue (attached);
see photocopy of Tycos warranty (attached); CD #1; CD #5
Research Facts
The four flow meter gauges at the front regulate the flow of nitrous oxide, cyclopropane, carbon
dioxide and oxygen and were very inaccurate; carbon dioxide was used to stimulate patient respiration
thus allowing quicker anaesthetizing; this model allows for two cylinders each of oxygen, nitrous
oxide and carbon dioxide; this was an improvement over earlier models, as cylinders sometimes
ran out of gas during operations; it was difficult to determine when the oxygen cylinder was empty
and nitrous oxide pressure falls very quickly; with this model, if a tank ran dry, the patient
could immediately be changed over to a full tank; another improvement was that the tanks were bigger
than those in earlier models; the principle of this machine is the same as other machines in
the same era; the regulators are single-stage regulators
Exhibit History
On exhibit in Museum gallery, anaesthesia exhibit - Oct. 2 1997-Oct. 24, 2001
Images
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