Fisher NS242 User manual

TABLE

INTRODUCTION
PRECAUTIONS
CONTROLS
TEST

PROCEDURE

CONNECTION

OPERATOR

VISUAL

INDICATORS

AUDIO

INDICATORS

ADDITIONAL

REPLACEMENT

ACCESSORIES

SPECIFICATIONS

Fa

OF

AND

FUNCTIONS

TO A PATIENT

CONTROL

FEATURES

OF

BATTERIES

=

CONTENTS

BUTTONS

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P/N

185040541

f

4

INTRODUCTION

PRECAUTIONS

Nerve stimulation
passing

through

not

by

characteristics

many

other nerve

NS242

deliversa

Skin

resistance,

gel

conductivity

electrodes,

way

to
stimulation.
constant
changing
pulse

must

supramaximal

The

INNERVATOR

truly

constant

at

up

to

the

voltage.

achieve

350

Therefore

are

essential

stimulators,

constantcurrentstimulation

electrode
vary

constant

consistent

The voltage

current

must

impedance,

be

of

sufficient

stimulation.

current

volts.

is

effected

tissue

surface

widely.

current

necessary

vary

and

the

NS242

pulses

by

the

between

and

When
is

supramaximal

intensity

is

up

CURRENT

electrodes,

the

pulse

primary,

the

INNERVATOR

resistance,

using

the

most

to

deliver

automatically

stimulating

to

designed

to

80

milliamperes

to

current

Unlike

pulse.

and

surface

effective

nerve

the

with

current

achieve

deliver

WARNING:

the

Risque

d'anesthesiques

The laws

this

This
allows

This
location.

Dangerously
device

batteries.

Triggering

bycertain

can
noise.
sensitive
life
operating

Possible

presence

device

and

7

οἱ

d’explosion.

and

statutes

to

use

device

should

transthoracic

device

should

Do

not

high

for

up

to

ofthis

electrasurgical

generate

The

NS242
electronic
is

totally

room

explosion

flammable

inflammables.

by,

not

use

voltages

10

nerve

high-energy

environments,

anaesthetics.

Ne

pas

utiliser

of

many

or

onthe

order

be

used

stimulation.

not

be

used

with

needle

may

minutes

after

stimulatar

units

has

been
circuitry
compatible

hazard

if

used

in

en

presence

countries

ina

for

(cauterles),Avhich

random

to

increase

restrict

ofa

physician,

manner

which

internal

nerve

electrodes.

exist

within

removal

of

may

be

caused

frequency

designed

battery

with

“normal”

this

the

with

CONTROLS

KEY

(1)

PROXIMAL — Positive

(2)

FAULT

INDICATOR — Set

(3)

REPEAT

iNDIGATOR — Repetitive

DEMAND

BUTTONS — Deliver a pulse

(4)

SINGLETWITCH = *

(5)

TRAIN

OF

{6}

REPEAT
(7) 1 SECOND

(8)
(8)

(10)

(11)

(12)

(13)

(14)

(15)

{16)

(17)

FOUR

TETANUS

BUTTONS — Activate a repetitive

SINGE

10

SECOND

12

SECOND

POWER

MUTE

CURRENT UP/DOWN

PULSE

LOW

BATTERY

MUTE

VISUAL

DISTAL — Negativa

TWITCH

SINGLE
TRAIN

OF

ON/OFF

BUTTON

BUTTON — Mutes

DELIVERY

INDICATOR

INDICATOR

SYMBOL — Audio

DISPLAY

OF

AND

FUNCTIONS

(Red)

current

TWITCH

FOUR

pulse

delivery

BUTTONS

*

pulsa delivery

SET

OUTPUT

(Black)

not

delivered

pulse

pattern

pattern

pulse

sound

sound muted

CURRENT

on

demand

pattern

operating

©

REPEAT

(3)

INN

FAULT

7

|<

FIGURE

1

om

RV/1TOR

NS

242

(19)

(14) 415)

(2

CURRENT

©

TEST

The

following

each

time

the

instrument

1.

Attach

inserting
banana
DISTAL

Connect

m

initiate a short
Switch

>

OFF

button.

Activate a single

>

by

selecting

(1

SEG
indicators
is

delivered

indicator
Emission

followed
warns
shorted

broken.

Whilst

9

single

to

initiate

instigates
attempt
the

normal

operator

beep
tone.

resistance

circuitry.

6.

Once
ensure

PROCEDURE

test

procedure

INNERVATOR

is

connected

the

lead

the

plugs

into

(black)

the

free

the

INNERVATOR

Set a delivery

the

TW).

should

(every 1 second).

should

of a half

by a continuous 2 secand

that

the

together

still

running a 1

twitch,

disconnect

an

alarm

to

deliver a pulse

audio

should

followed

This

procedure

alarm

the

test

procedure

that

the

must

is

used, and

to a patient.

to

the

colour

output

circuit

appropriate

Both

not

open

hear a half
by a continuous 2 second

INNERVATOR

INNERVATOR

coded

the

PROXIMAL

jacks,

ends

of

the

condition,

on

current

twitch

at 1 second

the

audible and

activate

each

be

shown

second

ends

of

the

properly

or

second

the

circuit

conditions

instead

pulse

delivery

second

tests

and

the

device’s

has

monotone

be

carried

before

right-angled

(red)

lead

together

using

the

of

10mA.

intervals

REPEAT

button

visual

time a puise

The

low

battery

on

the

display.

beep

heep,

lead

are

that

the

lead

repetitive

ends

of

the
condition.
and

at

the

of

hearing
sound,the
monotone

the

high

internal

been

completed

is

switched

out

the

by

and

to

ON/

not

is

lead
This
next

skin

off.

CONNECTION

The

following

connecting

1、

n

>

>

output

s

procedure

the

INNERVATOR

Ensure

that

OFF.

Power

of

the

device

unnecessary
Place

two

{disposable

suitable}

on

course

of
cases
figure

Connect
inserting
the
output
coded
that

Connect
patient

output
connected
attached
distal
electrode.
way

achieved
if

Following
switeh
OFF
until
indicates
stimulation

the

this

2).
the

the

PROXIMAL

jacks.

so

that

correct

the

electrodes.

jackis

jack

with

to

connector

If

then

by a somewhat

the

leads

the

button,

observation

that

TO A PATIENT

should

to a patient:

the

INNERVATOR

should

be

off

the

reusable

of

the

to

be
the

to

the

angled

(red)

and

ends

of

matching

end

The

and

proximal

attached

leads

are

then

increase

of

the

desired

attained.

during

patient

ECG

forearm,

stimulated.

the

are

of

PROXIMAL

the

The

electrode,

lower

on

to

discomfort.

standard

or

the

skin

nerve

is

usually

lead

right

The

colour

connections

other

positive,

is

negative.

the

the

proximal

(black)

the

supramaximal

are

reversed.

the

induction

INNERVATOR

and

the

has

been

be

utilised

is

switched

connection

to

prevent

electrodes

electrodes

along

ulnar

INNERVATOR

banana

connected

twitch

or

In

nerve.

jacks

DISTAL

(black)

lead

are

will

ensure

made.

the

lead

DISTAL

(black)

lead

should

connector

and

to

the

stimulation

current

of

anaesthesia

using

the

the

current

response

supramaximal

©

when

are
the

most

(See

by

into

colour

to

the

(red)

be

(red)

the

distal

in

this

is

than

ON/

İİİ

10

IMPORTANT:
tone
indicator this

exist,

delivered

This

dried

leads.

6.

After

INNERVATOR

Distal

Electrode

(Black)

Proximal

heard

and

to

be

or

faulty

use,

the

If a two

after the

indicates

current

the

patient,

caused

by

electrode(s)

always

is

switched

FIGURE

is

may

/

Z

Electrode

(Red)

second

audible

pulse delivery

that

atarm

selected

excessive

or

disconnected

ensure

OFF.

2

continuous

conditions

is

not

being

impedance,

that

the

OPERATOR

Buttons

are

to

A.
ON/OFF

CURRENT
CURRENT

MUTE

grouped

their

function:

CONFIGURATION

On/Off

Switches
operated
off

These
current
decrease

(mA)

{fthe
the
Similarly

DOWN

the

at

instantaneously.

UP
DOWN

buttons

to
the

steps

CURRENT

display

button

decreases

The

INNERVATOR

current

of

Mute

button.

+

This

buttonactivates

can

be

used

sound.

When

indicated

display.
The

mute

pushes

the

mute

off.

audible

used

to

The

mute

the

CONTROL

into

three

categories

BUTTONS

button.

INNERVATOR

any

time

to

turn

Current

Up

button.

Current

Down

are

used

be

currentsetting

each

quickly

by

holding

to

OMA.

more

to

mute

the

by

the

remains

MUTE

mute

pulse

to

delivered.

time

the

UP

button

advances

dewn

the

set

current

can

not

than

80mA.

the

mute

the

audible

mute

is

mute

symbol

in

effect

button

can

only

delivery

the

audio

BUTTONS

according

on,

and

the

INNERVATOR

button.

set

the

amount

They

increase

by 10

milliampere

button

is

is

held

down,

to

the

CURRENT

display

be

set

to

function,

pulse

in

operation

(2% ) on

until

again

to

switch

be

used

sound,

it

alarm

cannot

sound.

11

<

may

be

CURRENT

of

and

pressed.

then

80mA.

quickly

deliver

a

which

delivery

this

is

the

the

user

the

to

mute

he

©

12

B.

DEMAND

Buttons

which
demand.
pattern

TW

TOF

TET

G.

These
pulse
until
cycle,
patterns
indicator

1

10

12

When

will

Twitch

Delivers a single
Train-of-Four
Delivers a train

pulse
Tetanus
Delivers a tetanus

the

button

REPEAT

are

start/stop

pattern.

the

button

When

below

(4)

SEC

TW 1 Second

Pressing

be

delivered
pulse
button

SEC

TW

Pressing

be

delivered

pulse
button

SEC

TOF

Pressing

pulses
pulse
button

BUTTONS

will

deliver a single

the

be

delivered

button.

is

0.5

seconds

button.

is

BUTTONS

The

pulse

is

pressed

any

one

is

in

is

shown

this

at

pattern

is

pressed

10

Second

this

button

pattern

is

pressed

12

Second

this

to

be

repeated

pattern

is

pressed

button

Is

once

pulse.

button,

of

four

apart.

pulse

depressed.

buttons

which

pattern

again

of

the

operation

on

the

Twitch

button

button

causes a single

one

second

will

play

repeatedly

again

to

Twitch

causes a single

at

10

second

will

play

repeatedly

again

to

Train-of-Four

button

causes

every

will

play

repeatedly

again

to

pulse

pressed

only.

pulses

where

train

for

activate

will

play

to

terminate

three

repeat

the

visual

display.

(142).

(E)

intervals.

halt

the

button

intervals.

halt

the

a

train

12

seconds.

halt

the

pattern

on

the

pulse

each

©

as

long

as

a

preset

repeatedly

the

pulse

REPEAT

pulse

to

This

until

the

function.

(0.1Hz).

pulse

to

This

until

the

function.

button.

of

four

This

until

the

function.

VISUAL

The

INNERVATOR

indicators:

(see

INDICATORS

NS242

has

also

the

Figure 3 overleaf)

following

CURRENT

The

current

to

be

shown

in

mA

symbol.

PULSE

DELIVERY

The

pulse

solid

dot

every

time a pulse

MUTE

SYMBOL «x

This

is a speaker

when

visible

signal

is

REPEAT

SYMBOL

This

is

shown
indicates
patterns 1 SEC

TOF

is

running.

FAULT

SYMBOL

This

is

shown

indicates

„

deliver

the
conditions
activated
impedance,
if

the

patient

LOW

BATTERY

This

is

shown
indicates
and

must
INNERVATOR
normally
not

replaced

become

completely

delivered

milliamps

«delivery

in

the

centre

with a cross

it

indicates

muted.

as a small

that

one-of

TW,

as a small

that

the

INNERVATOR

specified

exist.

The

by

conditions

if

the

leads

electrodes

as a picture

that

the

batteries

be

replaced

will

for a short

eventually

to

and

is

indicated

indicator

of a circle.

is

delivered.

that

triangular

the

three

10

SEC

triangular

current

fault

indicator

are

disconnected

are

dry.

of a battery

are

continue

time.

If

the

the

blank

except

the

patient

is

shown

It

flashes

through

audible

arrow

repeat

TW,

or

12

arrow

is

not

and

may

of

excessive

becoming

shortly.

to

operate

batteries

display

for the

13

visual

mA

is

by

the

©

as

a

it

and

pulse

<

and

pulse

SEC

<

and

able

to

alarm

be

or

and

flat

The

are

will

low

ON

ーー

14

Displayed

battery

symbol.
INNERVATOR
replacing

the

Figure 3 —

By

Once

this

can

only

batteries.

Visual

The

(NNERVATOR

has

occurred

be

operated

、

Indicators

NS242

the

by

AUDIO

The

INNERVATOR

indicators:

PULSE

DELIVERY

This

is

every

time a pulse

AUDIBLE

ALARM

Heard
time a pulse
the

completion
second
conditions

This

is
delivers a pulse
+/-5mA

current.
may
disconnected

The

alarm

only

be
to

deliver a pulse.

The

alarm
automatically
the

alarm

THERE

If

the

alarm

+

do

not

*

do

not

fault

causing

INDICATORS

NS242

heard

as a monotone

as a half

second

is

delivered

of

exist.

every

that

The

conditions

leads

sound

is

each

sound

when

is

repaired.

NO

ALARM

sound

continue

deliver

any further

condition

the

limits

excessive

continuous

heard

tolerance

include

heard

JS

has

the

following

is

delivered.

pulse

beep

time

does

or

dry

NOT

time

the

is

occurring

running a repeat

single

monotone

indicating

each

will

MUTE

is

beep

incorrectly,

train

there

thatalarm

the

INNERVATOR

not

fall

within

side

causing

continuous
an

of

this

impedance,

patient

electrodes.

attempt

be

cancelled

condition

FACILITY

repeatedly:

pulses

repaired.

15

audible

beep

each

AND

at

is a 2

the

the

set

alarm

and

will

is

made

causing

function.

until

the

16

ADDITIONAL

Auto

power

shut-off.

The

INNERVATOR

after

20

minutes

off

the

INNERVATOR

no

buttons

the

Pressing

will
minutes,

This
battery
accidently

are

INNERVATOR

any

cancel

button

the

feature

is

deterioration

switched

will

of

non-use.

will

pressed

within

will

automatically

other

automatic

designed

to
if

on,

or

FEATURES

automatically

Prior

emit

than

shut

down

safeguard

the

is

left

to

power

three

beeps,

the

next

one
switch

the

ON/OFF

for

against

INNERVATOR

turned

switch

another

on.

off

shut-

and

if

minute

off.

button

20

rapid

is

REPLACEMENT

The

INNERVATOR

1.5

volt

AA

Batteries

should

indicator

(É%)

To

replace

top

rear

towards

as

the

should

the
down
Batteries.
polarity

cover.

NS242

batteries.

be

replaced

is

first

batteries,

of

the

the

be

inserted

indicated

OF

BATTERIES

is

powered

when

observed

INNERVATOR

bottom

simply

on

the

on

depress

of

observing

inside

the

the

the

low

LCD

the

by

pushing

back

the

of

the

17

by

three

battery

display.

clip

on

panel.
correct
battery

it

Automatic

is

This

monitoring

minutes.

shutdown

running a repeat

feature

also

has

will

function.

serves

not

been

not

occur

if

to

remind

undertaken

the

the

for

at

operator

user

that

least

20

18

ACCESSORIES

The

following

when

accessories:
NS242

Complete
and

operating
200NS001
200NS002

Nylon,

belt

loop.
200NS003

Adhesive,

pregeiled

domed

stimulator

200NS004

Black

inches).

Connect

200NS007
12m

disposable
ends.

200NS008

1.2m
reusuable
ends.

200NS009

185040541
185040547

part

ordering

Constant
Stimulator

with

manual.
Diagnostic
Carry

shock

resistant,

Colour — grey.

Disposable

dual

element

soft

foam

electrodes).

lead

Reusable

silicone

rubber

Non-adhesive.

using

nerve

Nerve

(48)

with alligator

electrodes

Nerve

(48°)

with

electrodes

Mounting

NS242
NS242

numbers

peripheral

nerve

nerve

Current

Peripheral

stimulator

Batteries

Probe

Case

zippered

Electrodes o ©

perforated

pad.

One

per

pack.

200NS007.

Electrodes

electrode,

Pack

stimulator

Stimulator

clips.

200NS003.

Stimulator

2mm

pin

connectors.

200NS004.

Bracket

Operating
Technical

should

stimulators

lead

not

included.

carry

electrode

dual

element

Connect

İ 7 2

51x38mm

of

10

lead

200NS008.

Lead

For

Colour

Lead

For

Colour

Manual

Manual

be

quoted

and

Nerve

200NS007

case

with

with

(two

using

nerve

(2x1.5

electrodes.

use

with

coded

use with

coded

SPECIFICATIONS

Output

current

Tetanus

frequency

Output

pulse

Output

pulse

Output

pulse

Output

voltage

Set

current

offset

Alarm

tolsrance

Power

requirement

Battery

life

Dimensions

一

一

To

display
oscilloscope
instrument.

small

precision

series

with

connected

across

range

form

width

rise/fall

limits

or

record

directly

To

record

resistor

the

patient.

this

0-80milliamperes,

selectable
steps

50Hz

Square

current,

unidirectional

200

+/- 5 microseconds

time<5

350
<5
+/-

current

Three
batteries

More
continuous

alkaline

Height - 160mm

Width - 73mm

Depth-

Weight — 0.18kg

(without

the

to

the

the

must

The

resistor.

in

wave,

monophasic,

microseconds,

microseconds

volts,

maximum
milliamperes
SmA

of

1.5

volt

than

300

batteries

43mm

batteries)

voltage,

output

jacks

current

be

connected

osciltoscope

19

10mA

constant

the

set

“AA”

hours

use

with

connect

delivered,

of

must

an

the

in

be

a