Dual Vu Teaching Laryngoscope

WLMD ID: akia
For surgeries that require general anesthesia, anesthesiologists often need to insert a plastic tube into a patient's trachea (wind pipe) to maintain an open airway and assist breathing. To do this they use a number of tools, including a laryngoscope. A laryngoscope is an instrument used to view the larynx (voice box), which is the opening to the trachea and lungs. This "Dual-Vu" teaching scope was made by DuPaCo. Before inserting the blade into the patient's mouth, this device is slipped onto the handle of the laryngoscope. A mirror inside the attachment allows a student to see the same view of the patient's larynx that the anesthesiologist sees.

Catalog Record: Dual Vu Teaching Laryngoscope

Access Key: akia
Accession No.: 1995-09-15-1 A

Title: [Dual-Vu scope : intubation teaching aid.]

Corporate Author: Dupaco, Inc.

Title variation: Alt Title
Title: Dual-Vu scope (intubation teaching aid).

Title variation: Alt Title
Title: Dupaco Dual-Vu scope.

Title variation: Alt Title
Title: Dual Vu.

Publisher: [San Marcos, California] : [Dupaco, Inc.], [1965-1980].

Physical Descript: 1 teaching aid : metals, plastic ; 16 x 6 x 8 cm.

Subject: Intubation, Intratracheal – education.
Subject: Teaching – instrumentation.

Note Type: General
Notes: The date range for the possible year of manufacture was estimated based on
the the packaging (1970s) that the device was donated with, and the date of
the only advertisement found for the device (1978). Also different Dual-Vu
was donated in 1981. The title, or name of the object, is based on text
printed on the box that accompanied the device and on the one advertisement

Note Type: With
Notes: The device was donated with the original packaging: a box that measures
approximately 11 x 17 x 8 cm; The text on the box includes a company stamp,
line] 1740 La Costa Meadows Dr. [new line] San Marcos, CA 92069 [new line]
Part No. 25040 Quantity 1”; “Dual-Vu Scope” is handwritten on three sides of
the box.

Note Type: Citation
Notes: Double vision [advertisement]. Food Drug Law J. 1978;57:160.

Note Type: Citation
Notes: Russo SG, Dierdorf SF. Teaching airway management outside the operating room.
In: Hagberg CA, ed. Benumof and Hagberg’s Airway Management. 3rd ed.
Philadelphia, PA: Elsevier, Saunders; 2013:1073-1082.

Note Type: Citation
Notes: Wong R, Naruse RT, Behringer EC. Airway management instruction in the
operating room. In: Hagberg CA, ed. Benumof and Hagberg’s Airway Management.
3rd ed. Philadelphia, PA: Elsevier, Saunders; 2013:1083-1093.

Note Type: Physical Description
Notes: A device to allow a second person see the view of the operator of a
laryngoscope; On one end is a metal “C” clamp for attaching to a medium sized
laryngoscope handle; Attached to the “C” clamp is a metal extension about 9
cm long, with a curve from about the 4 to 7 cm mark; The metal extension of
a viewing port is attached to the extension of the clamp; The viewing ports
extension is curved and approximately 4 cm long; It attached to the port via
a metal C clamp; The viewing port is made of black plastic and is the shape
of a tubular T-piece; Mirrors in the port reflect the view of the person
using the laryngoscope.

Note Type: Reproduction
Notes: Photographed by Mr. Steve Donisch on January 16, 2013.

Note Type: Historical
Notes: This device, from the 1970s or so, was designed to be a teaching aid for
intubation. To intubate means to place a breathing (endotracheal) tube into
the trachea. This is done to protect the patency of the patient’s airway and
assist breathing during anesthesia and surgery. To place an endotracheal tube
anesthesiologists use a tool called a laryngoscope to gently lift the tongue
and other tissue just enough to see the larynx (the opening to the trachea
that contains the vocal cords).

The Dual-Vu Scope clamps onto the handle of the laryngoscope so that a second
individual, looking through the view port, can see what the person using the
laryngoscope sees. It afforded a student observing their first intubations a
perspective that previously only the physician had. If the person performing
the intubation was still learning, it allowed the instructing physician to
better advise on subtle alterations in technique.

The knowledge and skills required to safely intubate patients are not easily
gained. In becoming experts in airway management, anesthesiologists spend a
lot of time learning a broad range of complex concepts, equipment options,
techniques, and standards. Today they gain the necessary physical and
critical thinking skills through a number of learning techniques beyond
observation, such as video-, computer- and manikin-aided simulation.

Note Type: Exhibition
Notes: Chosen for the WLM website (noted July 23, 2013).