ISO 7376-1:1994

INTERNATIONAL
ISO
STANDARD
7376-1
Second edition
1994-12-01
Laryngoscopic fittings -
Part 1:
Conventional hook-on type handle-blade
fittings
f%ments de laryngoscopes -
Partie 7: Systeme conventionnel manche/lame 2 enclenchement
Reference number
ISO 7376-1:1994( E)

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ISO 7376=1:1994(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 7376-1 was prepared by Technical Committee
lSO/TC 121, Anaesthetic and respiratory equipment, Subcommittee
SC 2, Tracheal tubes and other equipment.
This second edition cancels and replaces the first edition
(ISO 7376-1:1984), of which it constitutes a technical revision.
ISO 7376 consists of the following Parts, under the general title
Laryngoscopic fittings:
- Part 1: Conventional hook-on type handle-blade fittings
- Part 2: Ministure electric lamps - Scre w threads and sockets for
conven tional blades
- Part 3: Fibre-Öllumina ted re-usable rigid laryngoscopes
Annex A forms an integral part of this part of ISO 7376.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland

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0 ISO
OS0 737691:1994( E)
Introduction
In clinical anaesthesia and resuscitation, a variety of Paryngoscopes are
widely used for direct laryngoscopy. Because there is a clinical need for
a variety of blade forms and sizes, they are usually manufactured as
detachable blade and handle units.
There are two basic types of rigid laryngoscopes: those in which the light
Source is in the blade with a power Source in the handle, and those in
which the light Source is in the handle with Optical fibres being used to
transmit light to the blade. The former type is specified in this part of
ISO 7376 and ISO 7376-2, while the latter type is specified in ISO 7376-3.
The aim of ISO 7376 is to promote ready interchangeability between
blades and handles of the hook-on type made by different manufacturers.
The primary objective of this patt of ISO 7376 is to ensure interchange-
ability concerning mechanical fit and electrical contact between the
hook-on type of conventional laryngoscope handles and blades. This is
achieved by specifying the critical dimensions of the handle hook-on fit-
ting, combined with the use of two test pieces that affect interchange-
ability with the blades and by designating the minimum Performance
requirements. The secondary objective is to provide test procedures and
values for Performance.
No attempt has been made in this part of ISO 7376 to standardize either
the blade form or handle design except at the handle-blade fitting con-
nection between the two.

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ISO 7376=1:1994(E)
INTERNATIONAL STANDARD 0 ISO
Laryngoscopic fittings -
Part 1:
Conventional hook-on type handle-blade fittings
2.3 engagement: Mechanical attachment of the
1 Scope
blade and handle so that the blade remains securely
coupled to the handle in all positions.
This part of ISO 7376 specifies critical dimensions and
considerations for the junction of any blade and any
2.4 handle: Component held in the hand of the op-
handle of a hook-on type laryngoscope to allow en-
erator during use, one end of which forms the
gagement, lamp illumination and disengagement
hook-on connection for the blade.
through multiple cycles. An electrical lamp in the
blade is supplied with energy from the handle.
2.5 locking mechanism: Mechanism that retains
This part of ISO 7376 does not cover
the blade in the operating Position.
a) the blade form or handle design other than the
2.6 locking Slots: Components of the handle lock-
interchangeability aspects of the connection be-
ing surfaces that accept the locking mechanism of the
tween the blade and the handle;
blade to resist blade displacement from the operating
Position.
b) the measurement and specification of the lamp
illumination intensity;
2.7 operating Position: Position of the engaged
blade and handle when the instrument is ready for
c) disposable or flexible laryngoscopes, or laryngo-
use.
scopes designed for surgery;
d) laryngoscopes without a lamp in the blade.
3 Performance requirements
2 Definitions
3.1 Test method
For the purposes of this patt of ISO 7376, the follow-
ing definitions apply.
The requirements specified in 3.4 to 3.8 shall be de-
termined with the blade attached to test piece 1
2.1 conventional blade: Separate rigid component
(“GO ”) specified in annex A.
to provide direct Vision of the larynx, incorporating a
hook-on base and a lamp which has an electrical con-
nection at the hook-on end of the blade. 3.2 Hook-on blade and handle fittings
2.2 contacts: Components of the fittings which Detachable hook-on blade and handle combinations
come together to make an electrical circuit and thus which engage shall leck and illuminate when in the
operating Positi
...