A grey wheeled cart supports a beige 1990s era PC with a CRT monitor and a desktop PC case with a single 3.5″ floppy drive. A light pen is cradled in a holder on the side of the CRT monitor. To the right of the PC (from the perspective of the user) an articulate arm is mounted to the frame of the cart. At the end of the arm is a transducer for a 100-MHz ultrasound back scatter microscope.
The cart also contains several other elements:
Below the top surface that supports the PC is a retractable tray that holds a three-button trackball controller with a scroll wheel. This is the primary user interface for the instrument.
Below this is a shelf that holds a Sony Video Graphic Printer (Model UP-850), a monochrome thermal printer. A cardboard pocket holding 3.5″ disks has been placed on the shelf beside the printer.
Below this is a second shelf that holds a PC keyboard and a clear plastic bag containing two additional light pens.
Below this is an empty drawer.
A two-button foot pedal, usually placed on the ground in front of the instrument, can be stored in a metal tray at the back of the instrument.
Accession Number: 2024.ihpst.124
Alternative Name:
Primary Materials: Iron Aloy, Plastic, Glass
Monitor:
A white label on the front of the monitor has the following information handwritten in blue ink: “8-39// CC”
A white adhesive label on the back of the CRT monitor includes the following information:
“MODEL NO.// 38-CO5IMA-PP”, ‘PART NO.// 14L948GE2”, “SERIAL NO.// 383770046”, “PRODUCT NAME// ECM1411DMS”
Just below this, a clear label reads: “MANUFACTURED// MARCH 1993”
PC Case:
A white label on the front of the PC Case has the following information handwritten in blue ink: “8-39// CC”
A green and white adhesive label on the front of the PC case, features a bar code and the following Information: “ST. MICHAEL’S HOSPITAL// CE013709”
A small silver label on the back of the PC case, near the case fan opening, lists the following serial number: “SN 840-1016”.
Printer:
A green and white adhesive label on the front of the printer features a bar code and the following Information: “ST. MICHAEL’S HOSPITAL// CE013708”
Cart:
A silver label on the lower rear of the cart includes the following serial number: “S/N 1243’
A green and white adhesive label on the rear of the cart features a bar code and the following Information: “ST. MICHAEL’S HOSPITAL// CE013707”
Height = ~155, Width = ~110 , Length = ~110,
The ultrasound biomicroscope (UBM) permits the imaging of deep structures of the living eye using ultrasound frequencies of 50 to 100 MHz.
In use, the ultrasound probe tip is applied to the eye of a patient treated with a local anesthetic. A specialized eye cup is used as a coupling medium. Depth is encoded from the return signal using time-gain compensation. After signal processing, an ultrasound image is created representing a 5 x 5 mm area centred at the focal depth. This image can be stored as a video image, printed using the thermal printer, or saved and reviewed using proprietary software.
This item is in good cosmetic condition and is likely functional. One of the four casters of the UBM cart has become detached due to the welds breaking. This damage likely took place during shipment from St. Michael’s Hospital to Robarts Library. As a result, the cart became unstable and prone to tipping, with the risk that the CRT monitor could fall to the floor. To correct this, a removable bolted-on foot made by Curator Erich Weidenhammer was attached on December 13, 2024.
Associated Instruments:
Humphrey Instruments, Inc., San Leandro, Californian, USA.
Date of Manufacture: c. 1994 – 1998.
This instrument was purchased in 1998 during the establishment of the Glaucoma Unit at St. Michael’s Hospital. It was also loaned to Dr. Pavlin at Mount Sinai Hospital for his use while his UBM was in repair.
It was delivered from St. Michael’s Hospital to the University of Toronto collection room in Robarts Library on March 8, 2024.
Charles J. Pavlin, Michael D Sherar, and F. Stuart Foster. “Subsurface Ultrasound Microscopic Imaging of the Intact Eye.” Ophthalmology 97, no. 2 (1990): 244–50.
Charles J. Pavlin, Kasia Harasiewicz, Michael D Sherar, and F. Stuart Foster. “Clinical Use of Ultrasound Biomicroscopy.” Ophthalmology 98, no. 3 (1991): 287–95.
Mingguang He, Dandan Wang, and Yuzheng Jiang. “Overview of Ultrasound Biomicroscopy.” Journal of Current Glaucoma Practice 6, no. 1 (2012): 25–53.
The ultrasound biomicroscope (UBM) was developed over the late 1980s principally by Charles J. Pavlin of the Department of Ophthalmology, Princess Margaret Hospital in Toronto, and by F. Stuart Foster of the Department of Physics, Princess Margaret Hospital, and the Department of Medical Biophysics of the University of Toronto. The former, an ophthalmologist, developed the idea that ultrasound technology could be applied to study the effects of glaucoma on deep structures of the eyes of living patients. The latter, an expert on the engineering of high frequency scanning for medical applications, provided the technical expertise.
The first clinical images were made using a prototype instrument in March of 1990. Subsequent trials and medical publications proved the instruments’ efficacy.
In 1994, the first commercial instrument, the Model 840 was produced by Humphrey Instruments, Inc. of San Leandro, California, a division of Carl Zeiss AG.
In 1998, Paradigm Medical Industries, Inc. of Salt Lake City, Utah acquired the technology from Humphrey-Zeiss. Paradigm produced the P45 and later versions of the UBM workstation.
- Donated to UTSIC