Overview The Achilles tendon runs from the calf muscles at the back of the lower leg and inserts at the back of the heel. A torn achilles can be a partial rupture or a total rupture. A total rupture is more common in men affecting them 10 times more than women. Injury typically occurs 30 to 40 minutes into a period of exercise rather than at the start of a session and nearly always happens from a sudden explosive movement or bending the foot upwards. Many patients are able to continue to function following an achilles rupture due to other muscles compensating although the injured leg will be significantly weaker. There are four key tests which can help diagnose a ruptured achilles tendon. Causes The Achilles tendon is a strong bands of fibrous connective tissue that attaches the calf muscle to the heel bone. When the muscle contracts, the tendon transmits the power of this contraction to the heel bone, producing movement. The Achilles tendon ruptures because the load applied to it is greater than the tendon's ability to withstand that load. This usually occurs as a result of a sudden, quick movement where there is a forceful stretch of the tendon or a contraction of the muscles eg: jumping, sprinting, or pushing off to serve in tennis. This occurs most often in sports that require a lot of stopping and starting (acceleration-deceleration sports) such as tennis, basketball, netball and squash. The Achilles tendon is on average 15cm in length. Most ruptures occur 2-6cm above where the tendon inserts into the heel bone. This is the narrowest portion of the Achilles tendon and is also the area with the poorest blood supply. achilles tendon rupture is most common when the muscles and tendon have not been adequately stretched and warmed up prior to exercise, or when the muscles are fatigued. the Achilles tendon has a poor blood supply, which makes it susceptible to injury and slow to heal after injury. During exercise the amount of blood able to travel to the tendon is decreased, further increasing the risk of rupture. Most experts agree that there are no warning signs of an impending rupture. However, frequent episodes of Achilles tendonitis (tendon inflammation) can weaken the tendon and make it more susceptible to rupture. Symptoms Although it's possible to have no signs or symptoms with an Achilles tendon rupture, most people experience pain, possibly severe, and swelling near your heel. An inability to bend your foot downward or "push off" the injured leg when you walk. An inability to stand up on your toes on the injured leg. A popping or snapping sound when the injury occurs. Seek medical advice immediately if you feel a pop or snap in your heel, especially if you can't walk properly afterward. 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 Nonsurgical method is generally undertaken in individuals who are old, inactive, and at high-risk for surgery. Other individuals who should not undergo surgery are those who have a wound infection/ulcer around the heel area. A large group of patients who may not be candidates for surgery include those with diabetes, those with poor blood supply to the foot, patients with nerve problems in the foot, and those who may not comply with rehabilitation. Nonsurgical management involves application of a short leg cast to the affected leg, with the ankle in a slightly flexed position. Maintaining the ankle in this position helps appose the tendons and improves healing. The leg is placed in a cast for six to 10 weeks and no movement of the ankle is allowed. Walking is allowed on the cast after a period of four to six weeks. When the cast is removed, a small heel lift is inserted in the shoe to permit better support for the ankle for an additional two to four weeks. Following this, physical therapy is recommended. The advantages of a nonsurgical approach are no risk of a wound infection or breakdown of skin and no risk of nerve injury. The disadvantages of the nonsurgical approach includes a slightly higher risk of Achilles tendon rupture and the surgery is much more complex if indeed a repair is necessary in future. In addition, the recuperative period after the nonsurgical approach is more prolonged. Surgical Treatment Referral to a surgeon for open or percutaneous repair of the tendon is often necessary, followed by an immobilisation period. Functional bracing and early mobilisation are becoming more widely used postoperatively. There is no definitive protocol for this and it may differ, depending on the surgeon. Operative treatment has a reduced chance of re-rupture compared with conservative treatment (3.5% versus 12.6%) and a higher percentage of patients returning to the same level of sporting activity (57% versus 29%). The patient's desired functional outcome and comorbidities that affect healing will be factors in the decision to operate.