First trans-rectal lower bowel endoscope for colon
date: label: date made
content: 1953
name: label: Associated Name
content: University of Minnesota
label: Associated Name
content: National Cancer Institute
label: Associated Name
content: National Institutes of Health
label: maker
content: Wild, John J.
label: maker
content: Reid, John M.
notes: label: Description
content: This object is a prototype instrument used to create an ultrasound image of the colon. It was mounted on a wooden base for display by the maker, John Wild. The large, red, green, and silver cylindrical tube contains the drive shaft to control the rotation of the sound head, which is the small oval shaped piece at the end of the tube. This is no longer connected to a power source or display unit. The sound head contains the transducer, a device that converts mechanical signals into electrical signals and vice versa.
label: Description
content: The transducer is held in a small oval shaft at the end of a tube called a sound head. This sound head is specifically crafted for trans-rectal use to image the colon. The sound head is covered with a condom and filled with water from the other end of the instrument. This sound head, in theory, was meant to be inserted into a patient's rectum, after which the power source would begin the ultrasonic pulses. The drive shaft would move the sound head in a 45-degree sweep and an image would be created as the sound head is slowly removed by hand. This object was never used clinically because the drive shaft which rotated the transducer created a jerky and unclear image. The need for a fully rotational sound head that produced a 360-degree image was discovered when the transducer was placed in a fish bowl and could only produce an image in a narrow line of "sight." A fully rotational transducer sound head that moved in a smooth, circular motion was created for later models.
label: Description
content: Two later models were created based on this prototype model.
label: Location
content: Currently not on view
place: label: place made
content: United States: Minnesota, Minneapolis
label: Associated Place
content: United States: Minnesota, Minneapolis, St. Barnabas Hospital
label: Associated Place
content: United States: Minnesota, Minneapolis
topic: label: Subject
content: Ultrasound
label: Subject
content: Radar
label: Subject
content: Diagnostic Equipment
label: Subject
content: Imaging
label: Subject
content: Cancer
label: Subject
content: Medicine
label: associated subject
content: Endoscopy
setName: label: See more items in
content: Medicine and Science: Medicine
label: See more items in
content: Health & Medicine
creditLine: label: Credit Line
content: Gift of Ellen L. C. Wild and Valerie C. Wild
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2015.0300.06
label: accession number
content: 2015.0300
label: catalog number
content: 2015.0300.06
objectType: label: Object Name
content: trans-rectal lower bowel ultrasound endoscope
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: metal (sound head material)
label: Physical Description
content: wood (base material)
label: Physical Description
content: rubber (tube material)
label: Measurements
content: wooden base: 33 cm; 13 in
label: Measurements
content: overall: 25.5 cm x 6.9 cm x 20 cm; 10 1/32 in x 2 23/32 in x 7 7/8 in
label: Measurements
content: sound head: 3.3 cm x 7.2 cm; 1 5/16 in x 2 27/32 in