Intramedullary pins, because they are placed in the central axis of the bone, are very good at resisting bending forces in all planes.

Where is the intramedullary?

Intramedullary is a medical term meaning the inside of a bone. Examples include intramedullary rods used to treat bone fractures in orthopedic surgery and intramedullary tumors occurring in some forms of cancer or benign tumors such as an enchondroma.

What are intramedullary pins used for?

Intramedullary Pin (IM Pin) is a thin metal rod commonly used in orthopedic procedures for holding large bone fractures together. These pins function similarly to K Wire, but are larger in diameter.

How do I place an IM PIN?

Place IM pins into the medullary cavity of long bones (femur, tibia, or humerus) with either a drill or Jacobs chuck.
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Use a minimum of 2 cerclage wires and place them:

1. Approximately 1 cm apart.
2. At least 0.5 cm from the beginning and end of the fracture line.
3. Perpendicular to the bone shaft.

How is an intramedullary rod inserted?

Inserting the Rod

An intramedullary rod is inserted into the top of the femur and guided down through the fracture site and into the bottom portion of the bone. Surgical screws are inserted into the top end of the femur, through the rod and into the femoral head to secure the rod.

FEMUR OF DOG : Surgical Anatomy of bone and Intramedullary pinning technique

40 related questions found

How do pins in bones work?

This device helps hold your bone in place from outside your body. Pins may stay in place until the bone is healed. Your doctor will tell you how long the pins will be needed. The places where the pins go into the skin are called the pin sites.

How long does a rod stay in your leg?

“Once the bone or the joint has healed, you don't absolutely need it in there. It's just a matter of what someone wants to go through.” After a full 18 months with a rod in my leg, the bone is 100-percent healed and ready to take its typical beating.

Are intramedullary pins removed?

The protruding part of the pin is cut as close as possible to the level or below the level of the greater trochanter to avoid trauma to the muscle and sciatic nerve. This level will allow pin removal if necessary in the future.

What is intramedullary pinning?

Conclusion: Intramedullary pinning is an attractive alternative for the treatment of shaft fractures involving both forearm bones in adults. Best results are obtained if the fracture (situated outside the 5th sixth) can be stabilized without opening the focus with a single 2.5 mm pin.

Can a dog recover from a broken femur?

Fractures will need a minimum of 4 weeks of healing in young puppies, and 8-12 weeks for older dogs. The entire healing process can take up to 2-3 months if activity is properly restricted, and it will take longer if not.

What does intramedullary mean?

Medical Definition of intramedullary

: situated or occurring within a medulla an intramedullary tumor of the spinal cord especially : involving use of the marrow space of a bone for support intramedullary pinning of a fracture of the thigh.

How long is an intramedullary nail?

Consult the nail manufacturer's instructions. Usually a 10 mm nail is sufficient.

What are IM rods made of?

Rods and nails are long cylinders that are made of surgical grade metal (stainless steel or titanium). These devices are inserted inside the marrow cavity of a long bone (tibia, femur, humerus, or forearm bones). They are also called intramedullary (IM) devices, as they go inside of the bone.

Is intramedullary nailing painful?

Knee pain is a common complication of tibial shaft fractures treated with intramedullary nailing. A significant cause of knee pain appears to be violation of the proximal tibiofibular join by oblique locking screws. The surgeon should be careful not to penetrate tibiofibular joint when utilizing this nail design.

Can an IM nail be removed?

Intramedullary nail removal is safe. Patients with anterior knee pain should be told that their pain may persist and that knee pain may even arise. Most patients will require crutches and an average of 2 weeks away from work.

Can a broken femur heal without surgery?

Most people with a fractured femur need some sort of surgery, usually ORIF. Without the surgery, your broken femur may not heal properly. ORIF can place your bones back into their proper configuration. This significantly increases the chance that your bone will heal properly.

What are cerclage wires?

Cerclage wire refers to a type of orthopedic fixation/stabilization wire placed to approximate fractured bone fragments.

How do you do interlocking nails?

The nail is coupled to an insertion handle via a nail extension. It is introduced along the anatomical axis of the femur and inserted into the medullary canal of the proximal segment by hand or gentle hammering. The fracture is aligned while the nail is further advanced into the distal segment.

What is nailing in Ortho?

Intramedullary nailing is surgery to repair a broken bone and keep it stable. The most common bones fixed by this procedure are the thigh, shin, hip, and upper arm. A permanent nail or rod is placed into the center of the bone. It will help you be able to put weight on the bone.

Does getting pins removed hurt?

Pin Removal

Although patients may be anxious or cry, it is not a painful procedure, so they need not be scared. We usually place an Ace wrap over the pin sites, which can be replaced with a bandage the next day.

How do they take pins out of your hand?

A special tool is used to remove the pins as gently as possible. There may be a tiny bit of blood. The staff will apply a bandage and hold pressure. Once all the pins are removed, the staff will apply a bandage and wrap.

Can you feel metal plates in your body?

Plates and Screws

Examples include those around the knee, ankle, clavicle and elbow. This metalwork often sits just beneath the skin and as a result can be uncomfortable. It is easily knocked when it becomes noticeably tender. If metalwork is prominent around the ankle it can rub.

Are rods in bones permanent?

Your surgeon may use metal screws, pins, rods, or plates to secure the bone in place. These can be either temporary or permanent.

Can a rod in your leg break?

Metal implants can break. Typically they break as a result of fatigue failure. This means that the metal is not broken as a result of one sudden load, but rather it finally succumbs to repetitive cycles of stress.

Is it compulsory to remove rod from leg?

Most of the time, the rods and plates used to help the bone heal will not need to be removed in a later surgery.