Overview
An Achilles tendon rupture is also known as a rupture of the gastrocnemius tendon, or the common calcanean tendon. The tendon is actually composed of 5 different tendons, the two most important being the superficial digital flexor and gastrocnemius tendons. The gastrocnemius tendon is the largest of these, and is the most powerful extensor of the hock (ankle) joint. Both the superficial digital flexor and gastrocnemius tendons attach to the heel bone, called the calcaneus bone. A rupture of the Achilles tendon may be a partial tear, which means just the gastrocnemius is torn, or a complete tear, in which all five tendons have been torn. (show diagrams, normal anatomy vs partial vs complete tears).
Causes
There are a number of factors that can increase the risk of an Achilles tendon rupture, which include the following. Youre most likely to rupture your Achilles tendon during sports that involve bursts of jumping, pivoting and running, such as football or tennis. Your Achilles tendon becomes less flexible and less able to absorb repeated stresses, for example of running, as you get older. Small tears can develop in the fibres of the tendon and it may eventually completely tear. There is a very small risk of an Achilles tendon rupture if you have Achilles tendinopathy (also called Achilles tendinitis). This is where your tendon breaks down, which causes pain and stiffness in your Achilles tendon, both when you exercise and afterwards. If you take quinolone antibiotics and corticosteroid medicines, it can increase your risk of an Achilles tendon injury, particularly if you take them together. The exact reasons for this aren't fully understood at present.
Symptoms
You may notice the symptoms come on suddenly during a sporting activity or injury. You might hear a snap or feel a sudden sharp pain when the tendon is torn. The sharp pain usually settles quickly, although there may be some aching at the back of the lower leg. After the injury, the usual symptoms are as follows. A flat-footed type of walk. You can walk and bear weight, but cannot push off the ground properly on the side where the tendon is ruptured. Inability to stand on tiptoe. If the tendon is completely torn, you may feel a gap just above the back of the heel. However, if there is bruising then the swelling may disguise the gap. If you suspect an Achilles tendon rupture, it is best to see a doctor urgently, because the tendon heals better if treated sooner rather than later.
Diagnosis
Some patients mistakenly believe the tendon is working if they can push the foot down, however, patients will usually be able to move the foot up and down while sitting because the other surrounding muscles and tendons are still intact. Trying to push up while standing and applying body weight to the foot will reveal the true weakness. Sensation and circulation to the foot and ankle will be normal. In addition, x-rays will be normal unless the Achilles injury involves pulling off (avulsion) of the bone on the calcaneus (heel bone). This is quite rare, occurring in only a small fraction of patients with Achilles injuries. Patients suffering this type of Achilles avulsion injury tend to be older with weaker bone. Imaging Studies. Plain x-rays will be negative in patients who have suffered an Achilles tendon rupture. The rupture can be seen on ultrasound or MRI. However, these studies are not indicated for acute ruptures unless there is some uncertainty about the diagnosis. For chronic problems of the Achilles or ruptures that are old, an MRI may be very helpful.
Non Surgical Treatment
To give the best prospects for recovery it is important to treat an Achilles' tendon rupture as soon as possible. If a complete rupture is treated early the gap between the two ends of the tendon will be minimised. This can avoid the need for an operation or tendon graft. There are two forms of treatment available for an Achilles' tendon rupture; conservative treatment and surgery. Conservative treatment will involve the affected leg being placed in a cast and series of braces with the foot pointing down to allow the two ends of the tendon to knit together naturally.
Surgical Treatment
The patient is positioned prone after administration of either general or regional anesthesia. A longitudinal incision is made on either the medial or lateral aspect of the tendon. If a lateral incision is chosen care must be taken to identify and protect the sural nerve. Length of the incision averages 3 to 10 cm. Once the paratenon is incised longitudinally, the tendon ends are easily identifies. These are then re-approximated with either a Bunnell or Kessler or Krackow type suture technique with nonabsorbable suture. Next, the epitenon is repaired with a cross stitch technique. The paratenon should be repaired if it will be useful to prevent adhesions. Finally, a meticulous skin closure will limit wound complications. An alternative method is to perform a percutaneous technique, with a small incision (ranging from 2-4 cm). A few salient points include: the incision should be extended as needed, no self-retaining retractors should be used, and meticulous paratenon and wound closure is essential. Postoperatively the patient is immobilized in an equinous splint (usually 10-15) for 2 weeks. Immobilization may be extended if there is any concern about wound healing. At the 2-week follow-up, full weight bearing is permitted using a solid removable boot. At 6 weeks, aggressive physical therapy is prescribed and the patient uses the boot only for outdoor activity. At 12 weeks postoperatively, no further orthosis is recommended.
An Achilles tendon rupture is also known as a rupture of the gastrocnemius tendon, or the common calcanean tendon. The tendon is actually composed of 5 different tendons, the two most important being the superficial digital flexor and gastrocnemius tendons. The gastrocnemius tendon is the largest of these, and is the most powerful extensor of the hock (ankle) joint. Both the superficial digital flexor and gastrocnemius tendons attach to the heel bone, called the calcaneus bone. A rupture of the Achilles tendon may be a partial tear, which means just the gastrocnemius is torn, or a complete tear, in which all five tendons have been torn. (show diagrams, normal anatomy vs partial vs complete tears).
Causes
There are a number of factors that can increase the risk of an Achilles tendon rupture, which include the following. Youre most likely to rupture your Achilles tendon during sports that involve bursts of jumping, pivoting and running, such as football or tennis. Your Achilles tendon becomes less flexible and less able to absorb repeated stresses, for example of running, as you get older. Small tears can develop in the fibres of the tendon and it may eventually completely tear. There is a very small risk of an Achilles tendon rupture if you have Achilles tendinopathy (also called Achilles tendinitis). This is where your tendon breaks down, which causes pain and stiffness in your Achilles tendon, both when you exercise and afterwards. If you take quinolone antibiotics and corticosteroid medicines, it can increase your risk of an Achilles tendon injury, particularly if you take them together. The exact reasons for this aren't fully understood at present.
Symptoms
You may notice the symptoms come on suddenly during a sporting activity or injury. You might hear a snap or feel a sudden sharp pain when the tendon is torn. The sharp pain usually settles quickly, although there may be some aching at the back of the lower leg. After the injury, the usual symptoms are as follows. A flat-footed type of walk. You can walk and bear weight, but cannot push off the ground properly on the side where the tendon is ruptured. Inability to stand on tiptoe. If the tendon is completely torn, you may feel a gap just above the back of the heel. However, if there is bruising then the swelling may disguise the gap. If you suspect an Achilles tendon rupture, it is best to see a doctor urgently, because the tendon heals better if treated sooner rather than later.
Diagnosis
Some patients mistakenly believe the tendon is working if they can push the foot down, however, patients will usually be able to move the foot up and down while sitting because the other surrounding muscles and tendons are still intact. Trying to push up while standing and applying body weight to the foot will reveal the true weakness. Sensation and circulation to the foot and ankle will be normal. In addition, x-rays will be normal unless the Achilles injury involves pulling off (avulsion) of the bone on the calcaneus (heel bone). This is quite rare, occurring in only a small fraction of patients with Achilles injuries. Patients suffering this type of Achilles avulsion injury tend to be older with weaker bone. Imaging Studies. Plain x-rays will be negative in patients who have suffered an Achilles tendon rupture. The rupture can be seen on ultrasound or MRI. However, these studies are not indicated for acute ruptures unless there is some uncertainty about the diagnosis. For chronic problems of the Achilles or ruptures that are old, an MRI may be very helpful.
Non Surgical Treatment
To give the best prospects for recovery it is important to treat an Achilles' tendon rupture as soon as possible. If a complete rupture is treated early the gap between the two ends of the tendon will be minimised. This can avoid the need for an operation or tendon graft. There are two forms of treatment available for an Achilles' tendon rupture; conservative treatment and surgery. Conservative treatment will involve the affected leg being placed in a cast and series of braces with the foot pointing down to allow the two ends of the tendon to knit together naturally.
Surgical Treatment
The patient is positioned prone after administration of either general or regional anesthesia. A longitudinal incision is made on either the medial or lateral aspect of the tendon. If a lateral incision is chosen care must be taken to identify and protect the sural nerve. Length of the incision averages 3 to 10 cm. Once the paratenon is incised longitudinally, the tendon ends are easily identifies. These are then re-approximated with either a Bunnell or Kessler or Krackow type suture technique with nonabsorbable suture. Next, the epitenon is repaired with a cross stitch technique. The paratenon should be repaired if it will be useful to prevent adhesions. Finally, a meticulous skin closure will limit wound complications. An alternative method is to perform a percutaneous technique, with a small incision (ranging from 2-4 cm). A few salient points include: the incision should be extended as needed, no self-retaining retractors should be used, and meticulous paratenon and wound closure is essential. Postoperatively the patient is immobilized in an equinous splint (usually 10-15) for 2 weeks. Immobilization may be extended if there is any concern about wound healing. At the 2-week follow-up, full weight bearing is permitted using a solid removable boot. At 6 weeks, aggressive physical therapy is prescribed and the patient uses the boot only for outdoor activity. At 12 weeks postoperatively, no further orthosis is recommended.