Before you begin...

We hope the information given within this aid will help you better understand the risks and benefits of joint replacement surgery. This decision aid has been designed using the National Joint Registry (NJR) to help you understand your own risks from surgery using information from people like you.

We will need to know a few things about you in order to calculate the risks and benefits of surgery you are considering. If you have previously undergone an operation for a joint replacement, the calculated risk may not be as accurate.

If there is anything that you don’t understand after working through the aid, please discuss the options further with your clinician. You may wish to take a printout of the aid results for your consultation. If you have other questions that you would like to answer, please see the useful links menu.

In order to continue, you will need to know:

Your weight in either stones and pounds or kilograms
Your height in either feet and inches or metres
Your age in years
Whether you are considering a knee or hip joint replacement

If you need any help just click the information button to get more information.

About you

In this section, we will ask some questions about you in order to calculate your personalised risk.

Male

Female

Please select an option.

years old

Please enter a valid age. Calculation is possible for age from 30 to 100.

My measurement is in

meters

Please enter a valid height. Calculation is possible for height from 0.5 to 3 meters.

feet and

inches

Please enter a valid height. Calculation is possible for height from 2 feet to 8 feet and 11.9 inches.

My measurement is in

kilograms

Please enter a valid weight. Calculation is possible for weight from 20 to 200 kg.

stones and

pounds

Please enter a valid weight. Calculation is possible for weight from 4 stones to 30 stones and 13.9 pounds.

On a scale of 1 to 4, how is your health generally?

1: I am generally healthy

2: I have mild health problems that do not limit my activities (for example: well-controlled diabetes or high blood pressure)

3: I have significant health problems that limit my activities (for example: poorly controlled angina, breathing problems, complications from diabetes)

4: I have severe illness that is a constant threat to life

Please select an option.

About your surgery

This section will ask some questions about your surgery. You will need the assistance of your clinician for this section.

I am considering...

Knee surgery

Hip surgery

Please select an option.

Full knee replacement (total knee replacement)

Partial knee replacement (unicondylar knee replacement)

Kneecap replacement (patellofemoral replacement)

I don't know

Please select an option.

Regional (spinal/epidural/local) anaesthetic

General anaesthetic

Regional and general anaesthetic

Please select an option.

Foot pump / calf compressions

Thromboembolic disease stockings

Both

Other combinations

No mechanical thromboprophylaxis

Please select an option.

Heparin (with/without aspirin) only

Aspirin only

Other combinations

No chemical thromboprophylaxis

Please select an option.

Unconstrained

Posterior stabilised

Please select an option.

Posterior

Other

Please select an option.

Less than 32 mm

32 mm

Greater than 32 mm

Please select an option.

Uncemented

Cemented

Hybrid

Reverse hybrid

Please select an option.

MoP: Metal on polyethylene

CoC: Ceramic on ceramic

CoP: Ceramic on polyethylene

Please select an option.

How does your hip affect your life?

How does your knee affect your life?

For the next set of questions, think back over the last four weeks.

None

Very mild

Mild

Moderate

Severe

Please select an option.

No trouble at all

Very little trouble

Moderate trouble

Extreme difficulty

Impossible to do

Please select an option.

No trouble at all

Very little trouble

Moderate trouble

Extreme difficulty

Impossible to do

Please select an option.

No pain/More than 30 minutes

16 to 30 minutes

5 to 15 minutes

Around the house only

Not at all/pain severe when walking

Please select an option.

Not at all painful

Slightly painful

Moderately painful

Very painful

Unbearable

Please select an option.

Rarely/never

Sometimes, or just at first

Often, not just at first

Most of the time

All of the time

Please select an option.

Yes, easily

With little difficulty

With moderate difficulty

With extreme difficulty

No, impossible

Please select an option.

No nights

Only 1 or 2 nights

Some nights

Most nights

Every night

Please select an option.

Not at all

A little bit

Moderately

Greatly

Totally

Please select an option.

Rarely/never

Sometimes, or just at first

Often, not just at first

Most of the time

All of the time

Please select an option.

Yes, easily

With little difficulty

With moderate difficulty

With extreme difficulty

No, impossible

Please select an option.

Yes, easily

With little difficulty

With moderate difficulty

With extreme difficulty

No, impossible

Please select an option.

None

Very mild

Mild

Moderate

Severe

Please select an option.

No trouble at all

Very little trouble

Moderate trouble

Extreme difficulty

Impossible to do

Please select an option.

No trouble at all

Very little trouble

Moderate trouble

Extreme difficulty

Impossible to do

Please select an option.

Yes, easily

With little difficulty

With moderate difficulty

With extreme difficulty

No, impossible

Please select an option.

Yes, easily

With little difficulty

With moderate difficulty

With extreme difficulty

No, impossible

Please select an option.

No pain/More than 30 minutes

16 to 30 minutes

5 to 15 minutes

Around the house only

Not at all/pain severe when walking

Please select an option.

Yes, easily

With little difficulty

With moderate difficulty

With extreme difficulty

No, impossible

Please select an option.

Not at all painful

Slightly painful

Moderately painful

Very painful

Unbearable

Please select an option.

Rarely/never

Sometimes, or just at first

Often, not just at first

Most of the time

All of the time

Please select an option.

No days

Only 1 or 2 days

Some days

Most days

Every day

Please select an option.

Not at all

A little bit

Moderately

Greatly

Totally

Please select an option.

No nights

Only 1 or 2 nights

Some nights

Most nights

Every night

Please select an option.