A Patient's guide to Post-Operative Advice Following Pes Cavus Correction

• To prevent further deterioration/deformity
• Pain and decreased function not responsive to simple treatments
• Instability of the ankle (giving way)

Operations to correct the position of your foot include:

• Calcaneal osteotomy – the heel bone can be shifted to bring your heel back under your leg and the position fixed with a screw or plates and screws
• First metatarsal osteotomy – the bone leading to your big toe can be shifted and repositioned

Operations to rebalance the pull of the muscles in order to prevent the deformity returning include:

• Peroneal tenodesis – re-positioning and strengthening of the peroneal muscles (which turn your foot outwards)
• Tibialis posterior transfer – one of the muscles in your lower leg (called the tibialis posterior), which causes the foot to turn inwards (and cause deformity) is transferred to the outside of the foot to assist the weak muscles that turn the foot outwards

• Stable foot in a neutral position
• Improved function/mobility
• Less pain
• Improved walking – able to walk with fewer aids and orthotics (insoles)
• Improved muscle balance
• Decreased callosities (hard skin)/pressure areas
• Maintenance/improvement of range of movement
• Full recovery may take up to twelve months

You will see a pre-admission nurse to check you are medically fit and prepared for surgery. It is important to mention any medications that you are taking, either prescribed or non-prescribed, including over-the counter medications, herbal remedies or aspirin, warfarin, hormone replacement therapy (HRT), the contraceptive pill or medications for high blood pressure.

Before admission for your surgery, there are a number of issues that you need to think about, for example, can someone help you carry out basic every day tasks such as preparing and shopping for food? If you have stairs, how will you get up and down them? Do you have sturdy hand rails? If your toilet is downstairs, would it be easier to have your bed downstairs until you have recovered and able to negotiate the stairs safely?

The pre-admission nurse will discuss these with you and if they have any concerns about you coping at home after your operation, they may refer you to a physiotherapist and/or an occupational therapist. The therapist will telephone you to discuss your needs and it may be necessary to attend a more in-depth assessment. This will ensure that we plan for your discharge home safely and shorten your stay in hospital.

If you smoke, your surgeon may refuse to operate unless you can refrain from smoking before and during the healing phase of your procedure. Research has proven that smoking delays bone healing significantly. Please see Stop before your op leaflet.

Please ensure that you have a flat sturdy shoe to wear on the unoperated foot following surgery.

If you use a walking stick or crutches, please ensure you bring these with you too.

When you arrive back on the ward from theatre, your leg will be in a plaster cast back slab (half plaster) from toe to knee. You need to make sure that you do not get the plaster wet or put any weight to your foot. You will have stitches or staples with a dressing covering the wounds.

It is important to keep your leg elevated to above groin level for 55 minutes in every hour for the first two weeks following the operation. This helps to reduce swelling. It is important that you continue to elevate your leg regularly over the next few weeks/months.

A physiotherapist will see you on the ward and teach you how to walk using a walking aid. If you have to use stairs at home, you will be taught the safest way to do this.

You will usually stay in hospital for approximately one to two days after your operation. You will not be allowed to put any weight through your operated leg for usually six weeks after the operation.

After two weeks, you will see the Clinical Nurse Specialist and have your plaster changed and stitches removed. You will normally come out of the plaster completely six weeks after the operation and you are likely to then have your foot in a supportive walking boot.

Once you are out of the plaster, if everything is progressing satisfactorily, you will be referred for physiotherapy to reduce swelling, encourage movement and regain strength, balance and function. Physiotherapy is aimed at strengthening and co-ordinating your muscle in its ‘new’ position and is an essential part of your treatment.

• Returning to work: If your job is mostly sitting, you may be allowed back to work four weeks following surgery, provided you can keep your leg elevated. However, if your job is more physical and involve long periods on your feet then it may take longer.
• Walking: Most people aim to be walking independently by three months after the operation. However this depends on your walking tolerance before the operation.​​​​​​​
• Footwear: It can take several months for ankle swelling to go down, but most people can wear normal footwear by six months.​​​​​​​
• Driving: If you have an automatic car and undergone surgery on your left ankle, you can usually drive by two to four weeks after your operation. Otherwise, it may take about three months to be able to drive. In order to be safe to drive, you must be able to perform an emergency stop. You must inform your insurance company regarding the type of operation that you have undergone to ensure that your cover is valid.​​​​​​​
• Sport: Resuming sporting activity depends on your operation and will be discussed with you. Generally you can return to low impact sports at approximately six months.

Swelling – you should expect some swelling after your operation. If swelling persists or worsens and you are concerned, seek advice from a member of the foot and ankle team or from your GP.

Infection – any operation is at risk of infection. Fortunately it is not common in this type of surgery but a small number of patients do get a wound infection and these normally settle after a short course of antibiotics. In rare circumstances, the infection may be more severe and require further surgery to remove infected tissue and you may need to take a longer course of antibiotics.

Blood clots – Deep Vein Thrombosis (DVT) or Pulmonary Embolus (PE) are rare but can occur. Please inform the team if you have had a DVT or PE in the past or if you have a family history of clotting disorders. You will be given an anti-embolic stocking to wear on your other leg and daily blood thinning medications while your leg is in plaster.

Numbness or tingling – this can occur at the surgical site(s) if fine, hairlike nerves are cut or more major nerves are stretched. This is normally temporary; however patchy numbness or sensitised areas may be permanent. In rare circumstances, the nerves can become hypersensitive, which is a condition called ‘Complex Regional Pain Syndrome’. This can lead to severe pain as well as colour and temperature changes in the foot. If this happens, your consultant will discuss treatment with you.

Wound healing – if blood supply to the area is not good, wounds may be slow to heal. If this is the case, more frequent wound dressings may be required to ensure that the wound does not become infected.

Scarring – any type of surgery will leave a scar. Occasionally this can cause pain and irritation. If this happens, please discuss this with your consultant.

Metalwork – occasionally screws or plates can cause pain after surgery. If this is the case, please discuss your concern with your consultant as it may be possible to remove the metalwork once the tissues have healed.

REPORT SEVERE PAIN, MASSIVE SWELLING, CHEST PAIN, EXCESSIVE NUMBNESS OR PINS AND NEEDLES.