Smiths Hotline Manuel utilisateur

Blood and

Fluid Warmer

Maintenance, Testing

and Calibration

HOTLINE®Blood and Fluid Warmer Technical Service Pack 46

SECTION 5



Maintenance

Before each use

Carefully inspect the HOTLINE®for signs of damage, cracked or

split case, insecure poleclamp, damaged mains cable, etc.

If the Disposable Set does not install easily, lubricate the O-

Ring Seals.

Lubricating the O-Ring Seals

Using a cotton swab, apply a small amount of silicone grease

(Smiths Medical Part Number EZL 80-04-002) to the O-Rings in the

Disposable Set connector block.

If this does not solve the problem, reject the unit.

After each use

Wipe all external surfaces of the HOTLINE®with a soft cloth,

using an aqueous solution of mild detergent. If necessary, the

external surfaces may be disinfected using a solution of 10% bleach

in distilled water.

■Do not autoclave.

■Do not use alcohol or solvents.

■Do not use abrasive cleaning agents.

■Do not use cold sterilants.

■Do not immerse any part of the HOTLINE®in liquids.

HOTLINE®Blood and Fluid Warmer Technical Service Pack 47

SECTION 5



Maintenance

Routine Maintenance Tasks

Smiths Medical recommends that preventative maintenance

be carried out at specified intervals. Some maintenance tasks need

to be repeated at 30-day intervals and others at annual intervals,

depending on your choice of recirculating solution.

The three approved recirculating solutions and their

associated maintenance protocols are:

Precise directions for mixing the above solutions to the correct

strength are given on page 54.

Exceptionally, if the unit has had any non-routine servicing or

repair work, it will need to undergo a more thorough test and

recalibration sequence. This is detailed on page 64 and onwards.

Recirculating

Solution At 30-day Intervals At 12-month Intervals

Sterile

Distilled

Water

Visual Inspection

Lubricate O-Ring Seals

Replace Recirculating

Solution

Test All Alarms

Replace O-Ring Seals

Replace Recirculating Solution

Verify Temperature Calibration

Electrical Safety Test

Isopropyl

Alcohol

Solution

Visual Inspection

Lubricate O-Ring Seals

Replace Recirculating

Solution

Test All Alarms

Replace O-Ring Seals

Replace Recirculating Solution

Verify Temperature Calibration

Electrical Safety Test

Hydrogen

Peroxide

Solution

Visual Inspection

Lubricate O-Ring Seals

Test All Alarms

Replace O-Ring Seals

Replace Recirculating Solution

Verify Temperature Calibration

Electrical Safety Test

HOTLINE®Blood and Fluid Warmer Technical Service Pack 48

SECTION 5



Every 30 days

■Perform a Visual Inspection looking for damage to the case,

poleclamp, mains cable, etc.

■Lubricate O-Ring Seals with a cotton swab, applying a small

amount of silicone grease to the O-Rings.

Either, if using DISTILLED WATER as the

recirculating solution:

■Drain and replace the recirculating solution as described on

page 54.

or, if using ISOPROPYL ALCOHOL as the

recirculating solution:

■Drain and replace the recirculating solution as described on

page 56.

Finally

■Fill in, sign, and date the maintenance log record!

HOTLINE®Blood and Fluid Warmer Technical Service Pack 49

SECTION 5



Every 12 Months

Alarm Testing

Place the HOTLINE®on a suitable firm surface. Visually check

that the recirculating solution level in the reservoir is above the MIN

mark. Attach a Disposable Set, ensuring that it is free from kinks and

twists.

Plug the unit into the electricity supply and switch on. Verify

that the unit is working normally (recirculating solution circulating,

temperature display gradually rising towards 41°C).

General Alarm Test

Press the General Alarm Test button. Observe:

■the GREEN LED extinguishes.

■the THREE RED LEDs light up.

■the AUDIBLE ALARM commences beeping.

■the RECIRCULATING SOLUTION ceases circulating.

If any of the above responses are missing, the unit must be

removed from service and repaired.

HOTLINE®Blood and Fluid Warmer Technical Service Pack 50

SECTION 5



Every 12 Months

Over Temperature Alarm Test

Allow the unit to run for sufficient time to stabilise the

temperature. Press and hold the Over Temperature Alarm Test

button. Observe:

■the DISPLAY rises to 43°C - 44°C .

■the GREEN LED extinguishes.

■the RED Over Temperature LED lights up.

■the AUDIBLE ALARM commences beeping.

■the RECIRCULATING SOLUTION ceases circulating.

If any of the above responses are missing, the unit must be

removed from service and repaired.

Recirculating Solution Level Alarm

Remove the Fill Port plug. Using a non-magnetic tool, gently

depress the float switch arm.

Figure 5 - 1: Depressing the float

switch. Here you see an offcut of

scrap Disposable Set performing

excellently as a non-magnetic probe.

HOTLINE®Blood and Fluid Warmer Technical Service Pack 51

SECTION 5



Every 12 Months

Observe that:

■the GREEN LED extinguishes.

■the RED recirculating Solution Level LED lights up.

■the AUDIBLE ALARM commences beeping.

■the RECIRCULATING SOLUTION ceases circulating.

If any of the above responses are missing, the unit must be

removed from service and repaired. The unit should return to

normal operation upon releasing the float switch.

Disposable Set Interlock Alarm

While the unit is working normally, gently ease the Disposable

Set away from the interlock block. Be aware that a small amount of

recirculating solution may escape during this test. Before the

Disposable Set is fully disconnected, the alarm should operate.

Observe that:

■the GREEN LED extinguishes.

■the RED Interlock Alarm LED lights up.

■the AUDIBLE ALARM commences beeping.

■the recirculating SOLUTION ceases circulating.

If any of the above responses are missing, the unit must be

removed from service and repaired. The unit should return to

normal operation upon correctly reattaching the Disposable Set.

HOTLINE®Blood and Fluid Warmer Technical Service Pack 52

SECTION 5



Every 12 Months

Replace O-Ring Seals

■Remove the socket head screws with an 1/8-inch Allen key.

■Remove the disposable interface block, being careful of the

microswitch lever.

■Using a cotton swab, remove the old O-Rings, and clean out

the empty sockets.

GM-0163_8501-GB-A

Figure 5 - 3: Revealed: the O-Rings in their niches

Figure 5 - 2: Getting access to the O-Ring Seals

HOTLINE®Blood and Fluid Warmer Technical Service Pack 53

SECTION 5



Every 12 Months

■Apply a smear of silicone grease (Smiths Medical Part

Number EZL 80-04-002) to two new O-Rings, and locate

them in the sockets.

■Re-attach the disposable interface block.

■Re-fit the socket head screws. Again, take care not to

damage or bend the microswitch operating lever.

A kit of parts is available to make this task simpler. Please ask for

part number reference EZL 80-04-001.

Either, if using DISTILLED WATER as the

recirculating solution:

■Drain and replace the recirculating solution as described on

page 54.

or, if using ISOPROPYL ALCOHOL as the

recirculating solution:

■Drain and replace the recirculating solution as described on

page 56.

or, if using HYDROGEN PEROXIDE as the

recirculating solution:

■Drain and replace the recirculating solution as described on

page 57.

Finally

■Fill in, sign, and date the maintenance log record!

HOTLINE®Blood and Fluid Warmer Technical Service Pack 54

SECTION 5



Maintenance Solutions

Changing Recirculating Solution (Distilled Water)

If using plain distilled water as the recirculating fluid, then this

must be changed at the 30-day service interval, using the procedure

given here. Smiths Medical currently recommends using the

Hydrogen Peroxide based recirculating solution which allows a

12-monthly recirculating solution change protocol, resulting in a

significant reduction of service time.

Maintenance Solutions

At service intervals of either 12-months or 30-days, depending on the

composition of your recirculating solution, you will need supplies of ready mixed

solutions to perform maintenance. To make up a batch (1.4 litres) of solution, you

will need:

Formula 1

140ml of 3% Hydrogen Peroxide PLUS 1260ml distilled water

This may be used as a disinfectant fluid for flushing the recirculating solution

path during routine maintenance, or as a long-life recirculating solution enabling

fluid change intervals to be extended to 12-monthly.

Formula 2

700ml of 70% Isopropyl Alcohol PLUS 700ml distilled water

This may be used as a disinfectant fluid for flushing the recirculating

solution path during routine maintenance, or as a recirculating solution. It is NOT

suitable for long-term use, and must be replaced at 30-day intervals.

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